JavaScript is one of the most popular programming languages in the world. If you are looking for a website to be created with sophisticated interactivity or in search of an impressive mobile app, using JavaScript is the way to go. With the help of our expert Javascript Developers, you can bring your idea to life.

A Javascript developer on Freelancer.com can create dynamic web applications with extended features and improved user experiences. They can also design advanced gaming applications, develop cloud applications, and create powerful websites that work with less coding and low complexity.

Here's some projects that our expert Javascript Developers made real:

  • Developed interactive websites & apps with detailed user accounts experience
  • Created powerful applications that streamline complex data into actionable insights
  • Built custom Windows and Mac software designed to fit client specifications
  • Developed mobile apps that enables customers to access data from their phones
  • Connected databases to web interfaces with easy input/output functionality
  • Optimized existing code for faster loading pages and smoother user workflows

Javascript Developers on Freelancer.com know how to turn ideas into reality. They are experienced professionals dedicated to excellence and creating top-notch scripts that are easy to use, reliable and fast. If you have an idea but don’t know how to turn it into technical reality, Freelancer.com is the place to post your project. Hire our expert Javascript developers today!

From 660,965 reviews, clients rate our Javascript Developers 4.9 out of 5 stars.
Hire Javascript Developers

JavaScript is one of the most popular programming languages in the world. If you are looking for a website to be created with sophisticated interactivity or in search of an impressive mobile app, using JavaScript is the way to go. With the help of our expert Javascript Developers, you can bring your idea to life.

A Javascript developer on Freelancer.com can create dynamic web applications with extended features and improved user experiences. They can also design advanced gaming applications, develop cloud applications, and create powerful websites that work with less coding and low complexity.

Here's some projects that our expert Javascript Developers made real:

  • Developed interactive websites & apps with detailed user accounts experience
  • Created powerful applications that streamline complex data into actionable insights
  • Built custom Windows and Mac software designed to fit client specifications
  • Developed mobile apps that enables customers to access data from their phones
  • Connected databases to web interfaces with easy input/output functionality
  • Optimized existing code for faster loading pages and smoother user workflows

Javascript Developers on Freelancer.com know how to turn ideas into reality. They are experienced professionals dedicated to excellence and creating top-notch scripts that are easy to use, reliable and fast. If you have an idea but don’t know how to turn it into technical reality, Freelancer.com is the place to post your project. Hire our expert Javascript developers today!

From 660,965 reviews, clients rate our Javascript Developers 4.9 out of 5 stars.
Hire Javascript Developers

Filter

My recent searches
Filter by:
Budget
to
to
to
Type
Skills
Languages
    Job State
    583 jobs found
    Google Sheet Sync Bug Fix
    6 days left
    Verified

    I’ve wired a Google Sheet to my website and, for the most part, the two talk to each other just fine. Edits I make inside the sheet push through to the site immediately, so the outbound path is solid. The snag is the reverse trip: when I change text on the site, the corresponding cells in the sheet—usually whole columns or defined ranges—stay frozen. No errors pop up publicly; the sheet simply refuses to update. Here’s what I need during a live screen-share session: • Pinpoint why text changes coming from the site stall on arrival—whether it’s a Google Apps Script trigger, a Sheets API call, CORS, or some permission nuance I’ve missed. • Patch the underlying logic so every text edit on the site lands in the correct sheet range in rea...

    $33 Average bid
    $33 Avg Bid
    27 bids

    We need an experienced React developer who can join a small in-house team and, over the course of the next one to two working days, help put our website in top shape. ********Send link of your live project to be considered! The immediate priorities are: • Track down and fix two stubborn layout glitches and a couple of functionality errors that keep re-appearing after every deploy. • Profile the bundle, identify the worst bottlenecks, and guide the team through quick performance wins (code-splitting, memoization, lazy loading—whatever you see fit). • Pair-program a lightweight enhancement Only send proposal if you are available to jump in right away.

    $27 / hr Average bid
    $27 / hr Avg Bid
    107 bids

    I'm looking for someone familiar with to configure my mobile application (front end) to the web application (back end).

    $30 Average bid
    $30 Avg Bid
    36 bids

    HTML5 / .NET Developer Needed – Adult Website (NYC Preferred) Budget: $600 (fixed price) Start: Immediate I’m looking for an experienced HTML5 / .NET developer to work on an fetish website. Important: Applicants must clearly state and verify their current location. New York City–based developers are strongly preferred. Tasks • Batch conversion of images from JPG / PNG to WebP (SEO & performance optimization) • Refactor and optimize model/profile pages • Database cleanup (duplicates, orphan records, invalid entries) • Review, clean, and optimize existing JavaScript code • Identify and fix structural, indexing, and performance issues Required Skills • Proven professional experience with HTML5 and .NET • Strong JavaScript kn...

    $1261 Average bid
    $1261 Avg Bid
    142 bids

    I need a seasoned Zoho professional who can step straight into a live environment, implement several Zoho products, like Zoho Creator, Zoho CRM, Zoho Projects, Zoho Marketing Automation, Zoho Desk. Blueprints and WorkFlows, build reliable integrations across Zoho One, Zoho Creator and Zoho Qntrl. The work is centred on linking external platforms to our Zoho stack through REST APIs and custom Deluge scripts, so hands-on experience doing exactly that for at least three years is essential. Day-to-day you will design and write Deluge functions, map data models, configure API calls, and test every scenario until the sync runs flawlessly. Clear, concise English is important because we discuss requirements in real time and document each step for future reference. Availability during the standard...

    $35 / hr Average bid
    $35 / hr Avg Bid
    118 bids

    To all who have been in contact recently need not apply. Builders out of scope price range also need not apply. Real bids only, Please no place holder bids! We are seeking new bids. No teams or firms. Budget Scope between $500-$1k CDN. I'm seeking an experienced web developer to create a simple, yet visually appealing and modern website. The platform should mirror the functionalities of Kijiji or Craig's List but tailored for a unique purpose of my own, providing a space for users to connect over both services and goods. Custom site coding, PLP. Key Features to Include: - homepage or landing page will be clean with my site logo only. Nothing else. -Search page similar to Kijiji with categories and search. -Google search to narrow search by location. -Basic images for catego...

    $797 Average bid
    $797 Avg Bid
    216 bids

    Summary We’re looking for a senior software engineer with deep expertise in web scraping and automation to join a compact, fast-moving team working directly with one of our clients on a technically diverse and business-critical system. You’ll collaborate closely with the client (technical founder, serial tech entrepreneur) and two of our internal engineers. This role is ideal for someone who thrives in environments that require both technical depth and adaptability, enjoys working autonomously in a small team, and understands how to deliver value by solving the right problems. About the Project The system is designed to automate and streamline data aggregation from third-party ticketing platforms to support real-time event access management. It performs secure, large-scale l...

    $78 / hr Average bid
    $78 / hr Avg Bid
    53 bids

    I am building a web-based SaaS MVP that helps users evaluate and compare real estate investment opportunities by calculating IRR (XIRR) based on complex, time-based cashflows. This is not a property management tool. It is an investment evaluation tool focused on accurate return comparison. I already have: • A detailed SRS • Key screen designs in Figma • Clear functional and non-functional requirements I am looking for an experienced developer to implement the product based strictly on these materials. High-Level Scope (MVP) • User authentication (email + OTP) • Subscription plans with free trial (Payment gateway) and promo codes • Project creation & management • Flexible payment schedules • Exit strategies: Resale; Hold-to-lease (recu...

    $1511 Average bid
    $1511 Avg Bid
    228 bids

    I need to convert an existing React + Express web application into a standalone Windows desktop application using Electron. CURRENT STACK: - React 18 + TypeScript + Vite - Node.js + Express backend - PostgreSQL with Drizzle ORM (needs SQLite conversion) DELIVERABLES: 1. Windows installer (.exe file) 2. SQLite database implementation 3. Must work 100% offline 4. All features working (invoice, Excel export, printing) REQUIREMENTS: - Must sign NDA before receiving source code - Show previous Electron projects - Milestone-based payment Here are the project details: - React 18 + TypeScript + Vite frontend - Node.js + Express backend - PostgreSQL with Drizzle ORM (needs SQLite conversion) - Features: Invoice creation, Excel export, printing - Need: Windows .exe that works 100% offline BUDG...

    $297 Average bid
    NDA
    $297 Avg Bid
    14 bids

    Our Tech-Books–based learning platform needs a lightweight, maintainable chat layer so students can discuss material in the moment without leaving the site. Email-and-password accounts are already part of the project, so the chat module should reuse that authentication flow. Core requirements • Real-time delivery (WebSockets, , or a modern equivalent). • Both private 1-to-1 conversations and multi-user group rooms. • Every message saved to a database and retrievable as a scrollable history. • Clear, well-commented code that drops neatly into the existing Tech-Books repository, with a short README covering setup and any migrations. Tech freedom Choose the backend stack you work fastest with—Node/Express, Django/Channels, FastAPI, Go, etc.&mdas...

    $250 Average bid
    $250 Avg Bid
    99 bids

    We are looking for a skilled web developer to complete and launch NiwasNest, a PG/Hostel booking marketplace. The website is partially built. Core UI decisions are finalized. Your role is to complete remaining development and make it live. Scope of Work Dashboards Super Admin Listing Executive Hostel Owner Authentication Role-based login Google login for users & owners only Admin login separate Features Fix navigation & back arrow Razorpay payment (20% booking fee only) Image auto-resize & lazy loading Restrictions (Strict) ❌ Do not change business logic ❌ Do not redesign UI ❌ Do not add extra features ❌ Do not add subscriptions Requirements Experience with role-based dashboards Experience with payment integration Can deploy on Hostinger Can work independen...

    $389 Average bid
    $389 Avg Bid
    43 bids

    I need a lean, production-ready MVP that lets merchants automatically import daily transactions, apply a 2 % discount to cash and debit payments (none on credit cards), and see the results in real time. Here is the exact flow I want you to implement: – Import: pull sales data either through the POS API or a simple CSV upload. – Classification: flag each line as cash, debit, or credit so the right rule can run. – Discount engine: cash and debit entries receive an automated 2 % rebate; credit remains untouched. – Merchant dashboard (React preferred): totals by payment type, overall revenue, and the dollar value saved through the rebate. – Reporting: generate a monthly PDF that can be downloaded at any time. – Billing: charge the store 0.33 % of...

    $2311 Average bid
    $2311 Avg Bid
    168 bids

    I have a JavaScript-based After Effects plugin that currently stops at a licence-key prompt. I want the key check stripped out so the tool runs freely inside After Effects without altering any of its creation or edit features. You’ll receive the full original script, plus a short video showing where the licence gate appears. Your task is to analyse the code, locate every validation call and dependency, then deliver a cleaned script that loads in the current After Effects release exactly as the original—just without the activation step. Because the add-on is written in Adobe ExtendScript / JSX, solid JavaScript reverse-engineering skills are essential. I’m happy for you to use ESTK, VS Code, or any de-obfuscation utilities you prefer, as long as the final file is human-r...

    $23 Average bid
    $23 Avg Bid
    5 bids

    I’m creating a full-featured directory that showcases both local and online businesses. Every listing must display ratings and reviews, accurate contact information, and up-to-date business hours, all presented in a clean, responsive layout. Visitors should be able to refine results effortlessly with three key filters: location, category, and price range. Smooth, fast search performance across these parameters is essential. Here’s what I need from you: • A secure, scalable codebase (framework or stack of your choice) that powers the listing, review, and search functions • A straightforward admin area where I can add or edit businesses, moderate reviews, and manage filter values • Front-end pages styled for desktop and mobile, ensuring users can read hours...

    $411 Average bid
    $411 Avg Bid
    38 bids

    I already spun up the core structure of my informational site and now need a developer who can take it from “almost there” to polished, public-ready. The framework, navigation, and overall styling are in place; the remaining work centres on integrating final copy, tightening the design, and checking every last detail for quality. All text and images for the three remaining sections—About Us, Services, and Contact Us—are prepared and waiting. Drop the content in, align it with the existing look and feel, then make sure every page is fully responsive on desktop, tablet, and mobile. For Contact Us, I need a working form that delivers to my email with basic spam protection (reCAPTCHA or a lightweight alternative). While you’re inside the codebase, please tidy an...

    $1082 Average bid
    $1082 Avg Bid
    289 bids

    Project Title Shopify Product Page Optimization (Empire Theme) – Mobile-First Implementation from Figma Project Description We are running a Shopify store using the Empire theme and want to optimize our product detail page, with a strong focus on mobile usability and conversion optimization. We already have a complete Figma design that defines the new mobile layout 1:1. Based on this mobile design, a clean and well-adapted desktop version should also be implemented. The task is purely technical implementation. No design work is required. Scope of Work • Implement the mobile product page exactly according to the Figma design (pixel-perfect) • Create an adapted desktop version based on the same layout and components • Work within the existing Shopify Empire theme ...

    $694 Average bid
    $694 Avg Bid
    279 bids

    Required Qualifications - Strong engineering experience with JavaScript and/or PHP - Expert-level proficiency in WordPress, including core architecture and best practices - Deep understanding of performance optimization and scalability considerations - Deep understanding of security principles and secure coding practices - Ability to design and implement complex subsystems - Experience with large-scale, enterprise-level WordPress projects - Strong debugging skills, able to debug both your own code and others' code - Experience using debugging tools - Expert-level knowledge of HTML5 and CSS - Proficiency in using version control systems, especially Git - Solid understanding of MySQL and database-driven application design - Experience using RESTful APIs - Ability to set up and manage lo...

    $21 / hr Average bid
    $21 / hr Avg Bid
    102 bids

    I want to reproduce my entire Amazon UK storefront () as a clean, minimalistic static website hosted inside my existing Qix page. The site needs ten individual product pages that mirror the current listings—images, titles, descriptions, and pricing exactly as they appear on Amazon—plus an About Us section and a straightforward Contact Us page. Each product page must display authentic customer reviews pulled from Amazon (no comparison tables or cart functions; it’s a purely informational site). I will supply the review text and assets. A short “Our Company Story” video will be embedded on the homepage, so please make sure the build supports smooth playback on desktop and mobile. Strong, eye-catching banners are essential throughout the site; I’m loo...

    $196 Average bid
    $196 Avg Bid
    151 bids

    I need an online GIS map that lets users explore demographic data in an intuitive, visually engaging way. The core goal is data visualization, so the interface must update dynamically when a user pans, zooms, or applies filters. The dataset you will be working with is strictly demographic; the focal layer is a recent survey map that I will supply in GeoJSON. I want to see familiar metrics such as population density, age, and income rendered, but the map must always default to the survey layer so stakeholders can toggle the others on or off as needed. Key tasks • Set up a web-ready map (Leaflet, Mapbox GL JS, or another lightweight JavaScript library you prefer). • Style each demographic attribute with an intuitive legend and smooth, graduated color scales. • Add ...

    $131 Average bid
    $131 Avg Bid
    35 bids
    Discord mass DM Script Needed
    6 days left
    Verified

    I need a small, self-contained Go program that can send direct messages to members of a specific Discord server using an existing token I will supply. The goal is to reach every user in the target group while staying within Discord’s rate-limit guidelines so the account remains safe from flags or blocks. Core requirements • Written entirely in Go js or python (standard library plus popular Discord packages such as discordgo are fine). • Primary job: fetch the member list of the server I specify, then distribute a pre-set message to each user via DM. • Must respect Discord’s official rate limits automatically and back off on errors to minimise any risk of account lock. Extra functionality I want baked in • Basic scheduling: ability to start at a g...

    $224 Average bid
    $224 Avg Bid
    83 bids

    I need a production-ready automation, built entirely in ActivePieces, that links our Notion project database with Slack so the team never misses an important date. Here’s the flow I have in mind: • Poll the main Notion Projects table on a schedule I can adjust. • Detect anomalies—overdue items that are still open, deadlines landing while the assignee is on approved leave, and any other red flags you can surface with simple rule logic or lightweight AI. • Send Slack alerts for past-due items and reminders for upcoming deadlines, posting directly in the project channel and @mentioning the owner. • Hold for a human-in-the-loop step: when a staff member replies in Slack (“update status to In Review”, “push due date to Friday”, etc....

    $60 Average bid
    $60 Avg Bid
    42 bids

    My flutter app is already live on Google Play but i want my adminpanel hosting which is on react native code a new tab or button which i approve or reject and clear see user screen shot upload in my adminpanel and the back-office panel handles most day-to-day tasks. What it still lacks is a single control that lets me manage user screenshots from inside the dashboard itself. Here’s what I need added: a button that is visible to admins only which allows me to both upload new screenshots and mark them as approved in one flow. Once approved, the image should move to the “live” state exactly the way other assets in the system do now. Deliverables – kept short and specific: • New admin-only UI button labelled “Upload / Approve Screenshot”. &bul...

    $17 Average bid
    $17 Avg Bid
    13 bids

    We are looking for a skilled web developer to complete and launch NiwasNest, a PG/Hostel booking marketplace. The website is partially built. Core UI decisions are finalized. Your role is to complete remaining development and make it live. Scope of Work Dashboards Super Admin Listing Executive Hostel Owner Authentication Role-based login Google login for users & owners only Admin login separate Features Fix navigation & back arrow Razorpay payment (20% booking fee only) Image auto-resize & lazy loading Restrictions (Strict) ❌ Do not change business logic ❌ Do not redesign UI ❌ Do not add extra features ❌ Do not add subscriptions Requirements Experience with role-based dashboards Experience with payment integration Can deploy on Hostinger Can work independen...

    $137 Average bid
    $137 Avg Bid
    42 bids

    Website Frontend Upgrade Summary and Requirements 1.Frontend Upgrade: Improve UI/UX for both Candidate and Employer dashboards. 2.Job Search & Filters: Enhance job search filters for employers in China and global search for candidates. 3.PayPal Gateway Testing: Ensure proper PayPal payment processing on the frontend. 4.Email Notifications: Verify and test email functionality for registrations. 5.Chat Plugin Testing: Test and ensure the messaging system is functional and optimized. 6.Performance Enhancements: Optimize frontend code for faster page loads and improved responsiveness.( test loading speed ) 7.Documentation: Provide detailed documentation for all work completed. Operating Environment Frontend: , React.js Backend: Node.js, MongoDB Server: Aliyun ECS ( must have experienc...

    $47 Average bid
    $47 Avg Bid
    97 bids

    We are looking for an experienced WordPress developer with expertise in SCORM integration to make our e-learning platform fully dynamic. Currently, SCORM files are manually uploaded and embedded via iframes, which prevents tracking of user progress, quiz scores, completion status, and resume functionality. Your task will include: Implementing full SCORM support within WordPress Tracking user progress, quiz results, and completion percentages in the database Enabling resume/continue functionality for returning users Creating an easy-to-use system to upload SCORM packages (zip files) directly from the course add/edit screen or another workable method Ensuring smooth playback of SCORM content within courses Requirements: Strong experience with WordPress development and plugin integrat...

    $693 Average bid
    $693 Avg Bid
    37 bids
    Finish Web3 Presale System
    6 days left
    Verified

    Most of the presale UI is already implemented. What remains is the critical integration layer between the existing frontend and the deployed presale smart contracts. The goal is to complete and verify the end-to-end presale flow so users can safely and smoothly participate using ETH and USDT. This is primarily an execution and integration task, not a contract redesign. Current Status • Frontend is built with React + TypeScript and already renders the presale flow. • Presale smart contracts are already written and deployed on testnet. • Wallet connection via is live. • Placeholder methods exist where real contract calls need to be wired in. Your Mission You will be responsible for completing and validating the smart-contract interaction layer, including: – ...

    $731 Average bid
    $731 Avg Bid
    226 bids
    Content Area Layout Redesign
    6 days left
    Verified

    I need the main content area of my website re-organized so that information flows more logically and looks cleaner on desktop and mobile. The header, footer, and navigation can stay exactly as they are; the job is limited to a layout redesign focused on rearranging individual sections within the page. Please work with the current HTML/CSS framework already in place, adjust only what is necessary, and preserve existing styles, images, and text. Deliver a revised layout that: • Reorders the sections according to the wireframe I will supply. • Remains fully responsive across common breakpoints. • Uses semantic markup and clean, commented CSS for easy future edits. Once the updated files are in place, I will review on a staging link and provide any final tweaks before sig...

    $18 Average bid
    $18 Avg Bid
    34 bids

    I need a lightweight, custom-built web app that lets any visitor paste a YouTube link and either (a) download the video itself in common resolutions or (b) convert it to MP3 and grab the audio. No user accounts or CMS are involved—everything must be coded from scratch. You’re free to choose the stack (Node.js, Python, PHP, Go, etc.) as long as the code is well-structured, documented, and easy for another developer to maintain. The front end should be clean, mobile-friendly, and show clear progress feedback while the back end handles the heavy lifting through tools such as yt-dlp and ffmpeg (or any alternative you prefer) with automatic cleanup of temporary files. Deliverables • Fully functional site deployed on my server • Complete, commented source code and a sho...

    $48 Average bid
    $48 Avg Bid
    19 bids

    I’m giving my current offers-and-loyalty website a full facelift and I want the end result to feel as seamless to use as it is beautiful to look at. The top priority is smoother navigation and overall usability, so every layout decision should guide visitors quickly to the latest discounts, points balance, and redemption options—whether they’re reading left-to-right in English or right-to-left in Arabic. Modern, elegant styling is essential, but never at the expense of speed. Clean, standards-based HTML5, lightweight CSS3, and graceful JavaScript interactions will form the core; anything that bloats performance is out. The final build must be fully responsive across mobile, tablet, and desktop and switch fluidly between LTR and RTL without separate code bases. Key desig...

    $33 Average bid
    $33 Avg Bid
    18 bids

    My current site functions, but on phones it feels clunky and the call-to-action buttons don’t stand out. I want the whole browsing flow to feel intuitive and fast on any screen size, with special care given to how visitors move around on mobile. Here’s what I need from you: • Re-engineer the responsive layout so pages automatically adapt to common break-points without awkward zooming or horizontal scrolling. • Streamline the mobile navigation—fewer taps, clearer menu hierarchy, and thumb-friendly controls. • Refresh existing CTAs so they grab attention, are easy to tap, and guide users naturally toward conversions. I’ll share the live URL, design assets, and analytics snapshots once we start. Final code should be clean HTML5/CSS3/JS (or a li...

    $3011 Average bid
    $3011 Avg Bid
    213 bids

    Website Frontend Upgrade Summary and Requirements 1.Frontend Upgrade: Improve UI/UX for both Candidate and Employer dashboards. 2.Job Search & Filters: Enhance job search filters for employers in China and global search for candidates. 3.PayPal Gateway Testing: Ensure proper PayPal payment processing on the frontend. 4.Email Notifications: Verify and test email functionality for registrations. 5.Chat Plugin Testing: Test and ensure the messaging system is functional and optimized. 6.Performance Enhancements: Optimize frontend code for faster page loads and improved responsiveness.( test loading speed ) 7.Documentation: Provide detailed documentation for all work completed. Operating Environment Frontend: , React.js Backend: Node.js, MongoDB Server: Aliyun ECS ( must have experienc...

    $60 Average bid
    $60 Avg Bid
    80 bids

    I want to launch a full-featured e-commerce website that feels corporate and professional from the first click. The store must present a polished product catalog, guide shoppers through a friction-free cart, and close sales with a rock-solid payment gateway integration—all wrapped in a clean, modern UI that loads fast on mobile and desktop alike. To speed development and keep visual quality high, please lean on AI tools where they genuinely add value: Copilot or similar for clean, well-commented code; Midjourney, Firefly, or equivalent for crisp section images, banners, and other on-brand visuals; plus any Figma-level AI plugins that streamline wireframing and prototyping. Every asset should feel cohesive with a corporate design language: balanced whitespace, restrained color palett...

    $17 / hr Average bid
    $17 / hr Avg Bid
    34 bids

    WordPress / WooCommerce Performance Optimization (LiteSpeed + Cloudflare) Project Description I’m looking for an experienced WordPress performance expert to diagnose and fix slow website performance on my WooCommerce store. Current setup (already in place): WordPress + WooCommerce Flatsome theme LiteSpeed Enterprise server LiteSpeed Cache plugin already configured Cloudflare CDN already active and configured Dedicated server environment I am not looking for basic setup. I need advanced performance optimization and troubleshooting. Main Issues Slow page load (homepage, product pages, category pages) Too many JS and CSS requests Low scores in GTmetrix and PageSpeed Insights Some plugins loading scripts and database queries on pages where they are not needed Scope of Wor...

    $179 Average bid
    $179 Avg Bid
    132 bids

    Project is mostly complete. I need a web developer to make minor updates to the signup process and moderation tools. Should be a long term project : ) More details on pm.

    $124 Average bid
    $124 Avg Bid
    111 bids

    My web application is already 90 % finished and running well in the browser. What I need now is a skilled mobile developer to wrap it for both Android and iOS, give the interface a final layer of polish, and guide it through store approval. Scope in detail • Wrap the existing codebase using Flutter, Capacitor, or any solid WebView strategy that keeps maintenance straightforward. • Tidy up the overall layout so the look and feel match native expectations on phones and tablets. • Optimise performance—shorter loading times, smoother screen transitions, and, most importantly, fewer crash points on lower-end devices. • Verify and adjust anything required for Google Play and Apple App Store approval, with a particular emphasis on current security standards. &...

    $5620 Average bid
    $5620 Avg Bid
    178 bids

    About the Role We’re hiring an engineer whose primary responsibility is finding bugs, fixing them directly in production code, and verifying the fix end-to-end. This is not a reporting-only QA role. If you find a bug, you own it until it’s fixed and verified. You will not focus on building new features. Your impact is measured by product stability, reduced regressions, and faster bug resolution. What You’ll Do Actively explore and test the product without waiting for tickets Identify bugs through exploratory testing, edge cases, and real usage Reproduce issues locally or in staging Debug frontend and/or backend production code Fix bugs directly in the main codebase Add regression tests for every meaningful fix Verify fixes before and after deployment Reduce recurring bu...

    $11 / hr Average bid
    $11 / hr Avg Bid
    42 bids

    J-Business directory for Joomla developer required for dynamic Joomla website; please supply a reference Joomla site for consideration . Thanks I have a dynamic Joomla website ready for a solid J-Business Directory implementation and I’m looking for someone who knows this extension inside out. Here’s what I need done: • Core setup of J-Business Directory on my existing Joomla install, configured for business listings, user reviews, and advanced search filters. • Moderate visual and layout tweaks so the directory blends naturally with my current template—no full redesign, but it must look polished and branded. • Integration of payment gateways, social-media login, and Google Maps so listings can be purchased, shared, and located without friction. &bu...

    $765 Average bid
    $765 Avg Bid
    176 bids
    Full-Stack Next.js Site Build
    6 days left
    Verified

    I need a seasoned developer to take my informational website from concept to deployment, covering both the public-facing pages and a small but powerful back-office. The public side is straightforward: visitors browse content and, when ready, create an account or sign in. Authentication should be secure (JWT, NextAuth or a comparable approach), and once logged in, users simply access gated articles—no carts or payments for now. Behind the scenes, I want an admin area focused on analytics and reporting. Think concise traffic metrics, top-viewed pages, and user engagement trends presented in a clean dashboard. No extensive CMS is necessary; data can be read-only for this phase, but please structure it so future content-editing modules can slot in easily. Tech notes • (latest ...

    $232 Average bid
    $232 Avg Bid
    136 bids

    I need an additional URL added to my existing cryptocurrency-wallet API that talks directly to Binance Smart Chain. Its sole purpose is to return a clean, paginated transaction history for any wallet address I pass in. What I already have: a running backend with other endpoints live and a BSC node (plus test addresses) you can hit. What I need from you: • A RESTful / JSON endpoint (GET) that queries the chain and returns confirmed transactions in chronological order, with basic metadata (hash, from, to, value, timestamp, block). • Optional query parameters for start-block, end-block, page, and limit. • Error handling for bad addresses or network hiccups. • Brief inline docs and a short README so my front-end dev can plug it in without guesswork. • A...

    $527 Average bid
    $527 Avg Bid
    116 bids

    I need an additional endpoint added to my existing back-end so I can pull transaction history from a digital payment wallet integration similar to PayPal. The new route should return a clean JSON response containing the following fields for each record: • Transaction ID • Amount • Timestamp Please wire it into the current authentication flow, follow our code style, and document the request/response schema in a short README or inline comments so I can test it right away with Postman once delivered.

    $517 Average bid
    $517 Avg Bid
    152 bids
    PYN-TTHotel Auto Check-in API
    6 days left
    Verified

    Project Description We are looking for an experienced backend developer to build an automated integration between PYN Booking (Romanian PMS / Channel Manager with Open API) and TTHotel (TTLock hotel system). The goal is to automatically generate time-limited PIN codes for hotel room access based on reservations received in PYN Booking. ⸻ System Overview Reservations are created in PYN Booking from multiple sources (, Airbnb, website, walk-ins). When a reservation is created, updated, or cancelled, the system must automatically manage room access via TTHotel API. ⸻ Integration Flow 1. Reservation is created in PYN Booking 2. PYN Booking sends reservation data via webhook or API 3. Middleware service processes the reservation 4. Room is mapped to a smart lock 5. TTHotel API gener...

    $737 Average bid
    $737 Avg Bid
    186 bids
    GIF to Lottie Conversion
    6 days left
    Verified

    I have a finished GIF animation that now needs to live as a lightweight Lottie/HTML5 asset. The source is a standard GIF file and I don’t want any alterations to timing, colours, or artwork—just a clean, one-to-one conversion. The goal is smaller file size for broad “conversion media” use, so please optimise it for fast loading in any modern Lottie player. Deliverables • Optimised .JSON Lottie file • Quick HTML demo so I can preview it in a browser • Any asset folder the animation relies on If the finished Lottie looks identical to the original and comes in at a fraction of the weight, we’re done.

    $42 Average bid
    $42 Avg Bid
    43 bids

    I have an Android-only mobile application ready for a full round of quality assurance. I’d like you to install the latest build, explore every user-facing feature, and document anything that interrupts a smooth experience. Because a portion of the experience runs inside an in-app web view, I also need cross-browser checks on Google Chrome and Mozilla Firefox (mobile versions). This means verifying layouts, forms, links, and media playback behave the same way in both browsers. What I expect from you: • A concise spreadsheet or ticket list describing each issue, the exact steps to reproduce it, and your device/OS details. • Screenshots or screen-recordings for visual problems. • A short summary of overall stability, performance, and any edge-case concerns once ...

    $17 / hr Average bid
    $17 / hr Avg Bid
    32 bids

    I already have a clean HTML/CSS template for a real-estate site and now need the full stack put in place so the design comes alive. The core of the job is to wire up both the client side and the server side so visitors can browse listings and owners can post their properties once they create an account (Google OAuth sign-up/sign-in only). Search & filtering The search bar must support an advanced filter flow. At a minimum the user can refine results by: • price range • property type • number of bedrooms The front end should update results instantly without a page refresh, while the back end must return fast, paginated data. User accounts After a buyer or seller signs in with their Gmail account, they land in a personalised area that includes: • profi...

    $744 Average bid
    $744 Avg Bid
    255 bids

    I need a lightweight whatsApp business flow developed and integrated with a node.js back end to capture responses and initiate next step of the workflow. Deliverables • Project setup within WhatsApp business * Responsive Whatsapp form • Back-end service that sends messages and captures responses • WhatsApp API hook that sends the real-time alert • Clear setup guide or scripted deployment so I can move it to production without guesswork Acceptance criteria: clean code, integration with whatsapp and messages sending and receiving

    $282 Average bid
    $282 Avg Bid
    73 bids

    The goal is to launch a self-hosted e-learning website that mirrors the core experience of while being focused on Personal Development courses. I need the full cycle: UX/UI design, front-end development, back-end/LMS configuration, and final deployment on my server. Core platform features • Course marketplace – searchable, filterable catalogue with categories, tags, ratings and reviews. • Learning environment – video player, downloadable resources, transcripts, quizzes, progress tracking and a printable certificate generator once a learner meets completion criteria. • User accounts – Social media login, classic email sign-up and the option to browse as Guest (with guest progress saved only after registration). • Monetisation – secure ch...

    $386 Average bid
    $386 Avg Bid
    230 bids

    I’m looking for a complete, white-label platform that covers both loan origination and ongoing loan management, ready for me to rebrand and roll out to multiple lending partners. We want to take ownership of the code as well. For origination, the system must guide applicants smoothly from first touch through to signing. That means: • Application intake with a clean, responsive front-end • Automated or rules-based credit assessment • A configurable approval workflow that can handle multiple user roles and override levels • Generation and e-signing of credit agreements Once a loan is live, I need equally robust servicing tools: • Real-time repayment tracking with alerts for missed or partial payments • An integrated customer-service module wh...

    $10896 Average bid
    $10896 Avg Bid
    157 bids

    I need a robust automation layer that lets one “master” Flutter device trigger an event and have that same event executed instantly on every linked “child” device. We’ll be relying on an internet-based secure channel—WebSocket for low-latency pushes or fallback HTTPS APIs. The payload will be text-only for now (think JSON instructions or simple state keys). This will include webscraping primarily. Your task is to architect and code the synchronization logic, wire it into the existing Flutter app, and prove that a single tap or state update on the primary screen propagates to any number of secondaries in real time without missing, duplicating, or delaying messages. Deliverables • Server-side or cloud function that brokers the WebSocket / REST tra...

    $125 Average bid
    $125 Avg Bid
    19 bids

    I am looking for an experienced freelancer to help improve the SEO performance and make necessary modifications to my website: www.climaxinfotech.com. Key Requirements: - SEO Optimization - Comprehensive website audit (on-page & off-page SEO). - Keyword research and implementation for better ranking. - Meta tags, titles, descriptions, and image alt text optimization. - Improve site speed, mobile responsiveness, and overall performance. - Backlink strategy and content suggestions for higher visibility. - Website Modifications - Enhance UI/UX for better user engagement. - Fix technical issues (JavaScript errors, AJAX calls, iframe conflicts if any). - Update or redesign sections to improve functionality and aesthetics. - Ensure cross-browser compatibility and responsive design. - Add/mod...

    $392 Average bid
    $392 Avg Bid
    83 bids

    My + TypeScript app is live on Vercel and already delivers its core features, but the codebase needs a steady hand to stabilise, clean up, and lightly polish what is there—no rebuilds, no radical redesigns. The immediate focus is improving the overall user experience, especially navigation, ease of use, and the general visual feel, while ensuring nothing breaks in production. You’ll be diving into an existing GitHub repo, opening pull requests for every change, and deploying via our Vercel pipeline. A small, paid test task will come first so we can make sure our workflow meshes smoothly. Non-negotiable stack • (React + TypeScript) • Supabase – Auth, Postgres, RLS rules already in place • Vercel for builds and previews • GitHub PR workflow f...

    $29 / hr Average bid
    $29 / hr Avg Bid
    135 bids

    Recommended Articles Just for You