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    I’m ready to move my product idea from concept to a working backend and need an experienced Python developer to build a clean, well-documented RESTful API. The service will power a web and mobile interface, so stability, speed, and clear versioning matter. You’ll take charge of: • Designing the endpoint structure and data models • Implementing the API in Python (Flask, FastAPI or Django REST Framework—use the stack you’re fastest with) • Writing concise unit tests and inline docstrings • Adding basic authentication and error-handling middleware • Supplying a README with setup instructions and sample requests Must know MySQL Acceptance criteria: the project spins up locally in one command, all tests pass, and the sample cal...

    $24 / hr Average bid
    $24 / hr Avg Bid
    60 bids

    ...backend. Key expectations • Clean, intuitive UI built with any modern frontend framework (React, Vue, or Angular are all acceptable). • Secure role-based access on the backend (Node/Express, Django, Laravel—open to the stack you are most comfortable with, provided it is well-documented). • A relational database schema that prevents duplicate registrations and supports detailed reporting. • RESTful or GraphQL APIs so future mobile or micro-services can tap into the same data. • Deployment instructions (Docker or a simple cloud setup) so I can run the app on our institute server. Acceptance criteria 1. An Admin can log in, see pending company registrations, and approve or reject them. 2. Student applications appear on a dashboard with ...

    $37 Average bid
    $37 Avg Bid
    25 bids

    Requirements -Proven experience in software development with expertise in one of these stacks; Ruby on Rails, JavaScript, Python, C++, C#, Java, React, Angular, Vue and .NET frameworks. -Strong understanding of RESTful API design, web development practices, and front-end development using React or similar frameworks. -Hands-on experience managing cloud infrastructure on AWS and Azure platforms. -Familiarity with IT infrastructure components including RBAC (Role-Based Access Control), Linux server environments, and application deployment strategies. -Proficiency with version control tools such as GitHub, SVN, and Git. -Knowledge of database systems including MySQL and SQL Server along with SQL query optimization skills. -Experience working within Agile methodologies to deliver high-q...

    $48 / hr Average bid
    $48 / hr Avg Bid
    291 bids

    ...a product page with images and specs, add items to a cart, and move through a secure checkout that supports at least one mainstream payment gateway. A fast in-app product search is essential, and I’m keen on clean architecture so the codebase remains maintainable as the catalog grows. Data & back-end You’re free to recommend the most suitable stack for syncing inventory and orders—Firebase, RESTful APIs, or another proven option. Just be sure whatever you choose can scale and handle real-time updates without slowing the user experience. Deliverables • Full Android Studio project with readable, modular code • Signed release APK / AAB ready for Play Store submission • Basic admin or config documentation showing me how to add new produc...

    $287 Average bid
    $287 Avg Bid
    186 bids

    ...infrastructure, and secure web platforms, and can build a production-grade system capable of handling growing traffic and protecting digital content. Key Responsibilities Design and implement a scalable system architecture for an online tutorial marketplace and streaming platform. Develop backend services using Python and Java to handle core platform functionality. Build and maintain secure RESTful APIs for user authentication, content management, and transactions. Implement video hosting and streaming infrastructure with optimized delivery and playback performance. Integrate secure payment gateway systems for purchasing tutorials and managing transactions. Develop a content management system (CMS) for administrators and creators to: Upload tutorial videos Organize conte...

    $3104 Average bid
    $3104 Avg Bid
    274 bids

    ...and maintain the server-side architecture of our digital loan application platform. The ideal candidate will be responsible for building secure, scalable, and high-performance backend systems that support loan processing, user authentication, data management, and API integrations. **Key Responsibilities:** * Develop and maintain backend services for the loan management system. * Design secure RESTful APIs to support mobile and web applications. * Implement business logic for loan applications, approval workflows, and repayment tracking. * Integrate third-party services such as payment gateways, credit scoring APIs, and KYC verification systems. * Ensure high levels of data security, encryption, and compliance with financial regulations. * Optimize database performance and manag...

    $889 Average bid
    $889 Avg Bid
    83 bids

    ...long-term work on multiple web applications and APIs. You should be comfortable working on: Modern frontends (React and/or ) Backend and API development (Python, JavaScript/Node, Java, or C++) Database integration and performance optimization Deployments and basic cloud infrastructure (AWS or similar) Responsibilities: Build and maintain responsive web applications Develop and integrate RESTful APIs Write clean, maintainable, and well-documented code Collaborate via chat and occasional calls Provide regular progress updates and maintain clear communication Requirements: Strong experience in web development (frontend + backend) Solid understanding of HTML, CSS, and JavaScript Experience with React or (or similar modern framework) Experience with at least one backe...

    $8 / hr Average bid
    $8 / hr Avg Bid
    75 bids

    LeadExec API Integration Developer (Lead Posting, Ping/Post, Call Leads) We are looking for an experienced backend/API developer to implement a full LeadExec lead receiver integration. This is not a basic webhook job. You must have real experience with lead distribution platforms, ping/post logic, and handling async responses, offe.../v2/insert/general, /v2/insert/ping, /v2/insert/transfer, /v2/insert/calldata, /v2/update, /v2/duplicatecheck - Handle async callbacks, orderIds, offerIds, sendDelay, noSell flags, duplicate checks, delivery status, and failure states - PHP based development - scalable, secure with REST/JSON/webhook integration - Full logging and reusable architecture Skills Required: API Development, Twilio API, RESTful Architecture, API Documentation, PHP, Backend D...

    $13 / hr Average bid
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    69 bids

    ...flow I expect: 1. Student self-registration with email / phone verification 2. Guided application submission with document upload and fee receipt capture 3. Real-time application status tracking for applicants 4. AI model that ranks eligible candidates and produces the merit list on demand 5. Role-based access controls splitting the admin and student views 6. Clean, responsive UI plus RESTful (or GraphQL) API layer so we can integrate it with our existing ERP later Please deliver: • Source code (frontend, backend, AI module) in a Git repo • Database schema and seed data • Setup script or Docker file so we can deploy on-prem or to the cloud • Brief technical documentation explaining architecture, models used for ranking, and how to retrai...

    $77 Average bid
    $77 Avg Bid
    16 bids

    ...TypeScript for a responsive, type-safe frontend and Node.js/Express for a robust RESTful API backend. Implemented secure user authentication with JWT and cookie-based sessions, integrated MongoDB for scalable data storage, and connected multiple AI image generation APIs to deliver high-quality results. The application includes a sophisticated credit-based monetization system with tiered pricing (Basic and Premium models), real-time thumbnail preview with dynamic aspect ratio adjustments (16:9, 1:1, 9:16), and extensive customization options including 5+ visual styles, multiple color schemes, and optional photo uploads. Key technical implementations include multipart form data handling for image uploads, RESTful API design with proper error handling, responsive UI built wit...

    $416 Average bid
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    26 bids

    I’m planning a full, responsive e-commerce build in React and Node.js, but the first milestone is far more focused: within the next two weeks I need a product-showcase landing page that looks great on every screen size and loads fast. This page will be the publ...e-commerce build, tightening existing features, and layering in those user accounts and login you’ll have already touched. Product reviews and wish-lists may follow, so there’s plenty of runway if we work well together. Timeline Two weeks from contract start to hand-off. I’m scheduling code reviews midway so we can correct course early if needed. If React hooks, styled-components (or Tailwind), and RESTful Node APIs are second nature to you, and you’re happy to own both design and build for...

    $210 Average bid
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    132 bids

    I’m launching a new service-based startup and need a reliable tech partner who can deliver a complete web platform plus companion apps for both iOS and Android. The core of the pro... 4. Deployment to App Store, Google Play, and our chosen hosting environment Acceptance criteria • Booking flow completes in under three taps on mobile • Push, SMS, and email notifications fire on schedule • All transactions and user data encrypted in transit and at rest • Daily ad performance report delivered by 10 a.m. EST Experience with React Native or Flutter, Swift/Kotlin, RESTful APIs, Stripe (or similar), Firebase/AWS, and Google Ads/Facebook Ads dashboards will help you hit the ground running. If this blend of build-and-grow excites you, let’s talk ...

    $27 / hr Average bid
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    337 bids

    Full-Stack MERN E-Commerce Store Development Looking for an experienced MERN stack developer to ...categories, image uploads) Shopping cart & checkout flow Order management system User profiles & order history Admin dashboard with analytics Product reviews & ratings Favorites/wishlist functionality Responsive design Deliverables: Fully functional frontend and backend RESTful API with proper middleware MongoDB database schema Secure authentication system PayPal payment integration Admin panel for product/order/user management Clean, maintainable code Required Skills: Strong experience with MERN stack Redux state management RESTful API design MongoDB/Mongoose JWT authentication Payment gateway integration Responsive UI development Please share your portfolio with...

    $6019 Average bid
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    56 bids

    ...about an academic conference (presentations, authors, and presentation types). The API should be structured and follow good software architecture practices. It will include endpoints to retrieve and manage data such as authors, presentations, and presentation types. The API should return responses in JSON format, support HTTP methods (GET, POST, PATCH, PUT, DELETE) where appropriate, and follow RESTful design principles. Key requirements include: PHP-based REST API (no frameworks) Integration with an existing MySQL database Clean, well-structured code Input validation and secure database queries Pagination support for large datasets Clear API endpoints for authors, presentations, and types The final deliverable should be fully functional API code that can be hosted on a ...

    $107 Average bid
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    72 bids

    ...looking for an experienced Full Stack Developer with strong expertise in Django (Python) and React.js to help build and maintain a scalable web application. This is a long-term opportunity for the right candidate. Responsibilities: Develop and maintain backend services using Django and Django REST Framework Build responsive, high-performance front-end interfaces using React.js Design and integrate RESTful APIs Work with relational databases (PostgreSQL preferred) Implement authentication, authorization, and security best practices Write clean, maintainable, and well-documented code Collaborate with the team on architecture and feature planning Troubleshoot and optimize application performance Required Skills: 3+ years experience with Django 3+ years experience with React.js Stron...

    $48 / hr Average bid
    $48 / hr Avg Bid
    115 bids

    Full-Stack MERN E-Commerce Store Development Looking for an experienced MERN stack developer to ...categories, image uploads) Shopping cart & checkout flow Order management system User profiles & order history Admin dashboard with analytics Product reviews & ratings Favorites/wishlist functionality Responsive design Deliverables: Fully functional frontend and backend RESTful API with proper middleware MongoDB database schema Secure authentication system PayPal payment integration Admin panel for product/order/user management Clean, maintainable code Required Skills: Strong experience with MERN stack Redux state management RESTful API design MongoDB/Mongoose JWT authentication Payment gateway integration Responsive UI development Please share your portfolio with...

    $6246 Average bid
    $6246 Avg Bid
    198 bids

    Full-Stack MERN E-Commerce Store Development Looking for an experienced MERN stack developer to ...categories, image uploads) Shopping cart & checkout flow Order management system User profiles & order history Admin dashboard with analytics Product reviews & ratings Favorites/wishlist functionality Responsive design Deliverables: Fully functional frontend and backend RESTful API with proper middleware MongoDB database schema Secure authentication system PayPal payment integration Admin panel for product/order/user management Clean, maintainable code Required Skills: Strong experience with MERN stack Redux state management RESTful API design MongoDB/Mongoose JWT authentication Payment gateway integration Responsive UI development Please share your portfolio with...

    $6294 Average bid
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    159 bids

    I’m building a new product on AWS using PHP 8, React for web, and React Native for mobile. The front-end foundations are in place; where I need your expertise is the backend. Here’s what I need you to dive into: • API creation and integration – design RESTful (and, where it makes sense, GraphQL) endpoints, document them clearly, and make sure front-end clients can consume them with minimal friction. • User authentication and management – implement secure signup/login, token refresh, and role-based access control, ideally with best-practice libraries such as Laravel Sanctum or AWS Cognito if we decide to offload. • Data processing and storage – wire up efficient flows that read and write to MySQL, PostgreSQL, and the pg-vector ex...

    $4 / hr Average bid
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    27 bids

    I am looking for a professional Interior Designer to create a comprehensive design and 3D render for my 2BHK flat. The goal is to transform the entire home into a serene, clutter-free sanctuary with a clean-lined, modern minimalist aesthetic. ​The Scope Includes: ​Living & Dining Area: Open-plan layout focused on flow, seating comfort, and a TV unit solution. ​Master Bedroom: A calm, restful space with integrated storage. ​Workroom (Home Office): Highly functional, minimalist workspace designed for focus and organization. ​Kitchen: Clean, streamlined cabinetry and layout optimization. ​2 Bathrooms: Modern fixtures and efficient use of space. ​Specific Deliverables Required: ​Full 3D Renderings: High-quality, photorealistic 3D models of all rooms (Living/Dining, Bedroom, Workroom...

    $70 Average bid
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    12 bids

    I’m commissioning a 4-foot bronze sculpture of a man sea...you: • Concept sketches showing pose, clothing cues, and proportion • A small maquette or 3-D model for approval before full casting • Full fabrication in bronze, finished at approximately 4 feet (1.22 m) tall when seated • Progress photos of mould, pour, and patina stages • Crating and shipping to my location (freight details can be worked out together) I can supply reference images of restful poses and Washington-era garments as soon as we start. Timelines are flexible within reason; quality and structural integrity matter most. If this blend of modern minimalism and historic attire excites you, I’d love to see a brief portfolio link and hear how you would approach the casting...

    $2924 Average bid
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    51 bids

    ...support can pull a full customer folder in seconds. I also want an at-a-glance timeline that shows where each customer sits in the overall journey, from first visit to final approval, along with an audit trail of every edit or status change. Core expectations • Responsive web portal for field staff with login, drag-and-drop or camera upload, real-time validation, and progress indicator. • RESTful (or GraphQL if you prefer) API connecting portal to the database. • Database schema that indexes everything by customer ID while still letting me filter by date or document type when needed. • Admin dashboard to search, download, or export complete customer packages and track turnaround metrics. • Clear hand-off documentation and a short screen-share w...

    $454 Average bid
    $454 Avg Bid
    48 bids

    I’m building a new service and need a backend expert who can own the entire authentication layer. The stack is TypeScript end-to-end, PostgreSQL for storage, and a React front-end that will consume your work through a clean RESTful API. Everything lives on a Linux server, so familiarity with its ecosystem is essential. Your main mission is to design and implement a rock-solid user authentication system—think sign-up, login, refresh tokens, password resets—while keeping performance tight and code readable. Alongside the coding, I need you to lock the server down: enforce SSL, fine-tune PostgreSQL roles, manage environment secrets, set up firewalls, and apply best-practice hardening so that security audits pass without a hitch. Deliverables: • Fully documented...

    $641 Average bid
    $641 Avg Bid
    90 bids
    WPF REST Client Development
    Ending left
    Verified

    ...with basic validation. 3. A reusable service class that handles authentication, GET/POST/PUT/DELETE, and graceful error reporting. 4. Simple pages for login, record listing, record details, and record creation/editing—dummy styling is fine, I mainly need the plumbing in place. 5. A short README explaining how to run and extend the project. If you have experience wiring WPF front ends to RESTful backends, this should be a straightforward build. Feel free to mention any existing MVVM frameworks or HTTP libraries you prefer; I’m flexible as long as the code stays clean and easy to maintain....

    $7 - $14 / hr
    Sealed
    $7 - $14 / hr
    36 bids

    ...the business: Managing inventory, Tracking orders as they move through fulfilment, and direct Communication with consumers through a built-in messaging or ticket system. Notifications (email and/or in-app) whenever stock runs low or a customer sends a message will save everyone time. Shared requirements • Single-sign-on or at least a unified authentication layer across the three portals • RESTful (or GraphQL) API that cleanly separates front-end and back-end logic • Modular, well-documented code so future features slot in without rewrites • Modern stack: I’m comfortable with React + Node, Vue + Laravel, or a comparable framework—propose what you do best • Docker-based dev environment and deployment scripts for staging and production...

    $42 Average bid
    $42 Avg Bid
    24 bids

    ...FastAPI-based RESTful interface that links our internal machine-learning pipelines to several external services, making sure the data flows securely, quickly, and reliably. You will work side-by-side with data scientists and algorithm engineers; while they refine models, you will expose their work through well-structured endpoints and schedule long-running jobs with Celery. A deep understanding of asynchronous programming, background job queues, and the nuances of production-grade REST APIs is therefore essential. Key tech you should already be fluent with includes: • Python 3.x, FastAPI, Pydantic • Celery with Redis or RabbitMQ back-ends • OAuth2 / JWT for securing endpoints • Docker and Git for reproducible builds and clean collaboration Deliverab...

    $28 / hr Average bid
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    170 bids

    ...Frontend Developer (React or Angular) 2–4 years experience Experience building production-grade dashboards API integration experience State management (Redux / NgRx or similar) Experience with financial or regulated products is a plus Strong understanding of UX in form-heavy flows - Backend Developer (.NET Core) Strong experience in ASP.NET Core Experience designing RESTful APIs Experience integrating third-party APIs Clean Architecture / DDD knowledge preferred Strong documentation skills (Swagger, API specs, technical docs required) Experience handling payments and secure flows is a major plus - Database Engineer (SQL Server) Strong SQL Server experience Database schema design for transactional systems Indexing, performan...

    $5522 Average bid
    Local
    $5522 Avg Bid
    71 bids

    ...balance updates and a full transaction history. An admin panel should allow me to view, approve, or decline deposits and withdrawal requests, manage user profiles, and monitor all gameplay rounds. Security, input validation, and clean separation between business logic and presentation are essential. Key deliverables • Fully responsive front-end (desktop & mobile). • Laravel backend with RESTful APIs, middleware-protected routes, and secure Razorpay integration. • Wallet subsystem covering deposits, balance updates, withdrawal flow, and ledger storage. • Random result engine, payout calculation, and game history per user. • Admin dashboard with user and transaction management tools. • MySQL schema, seeders, and migration files. &...

    $401 Average bid
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    28 bids

    ...interactive video avatars (e.g., HeyGen, Synthesia, or custom WebRTC-based avatar rendering) tied to STT/TTS pipelines. Data & File Handling: Ability to build robust data parsing pipelines for Excel/CSV files and implement automated batch processing and rollback features. API & Backend Integration: Proven ability to build middleware and integrate AI agents securely with complex ERP databases via RESTful APIs. Vision-Language Models (VLMs) or Advanced OCR: Ability to extract tabular data from PDFs using tools like LayoutLM, AWS Textract, or Azure Document Intelligence. Semantic Mapping Engine: Experience using LLMs for "Schema Matching"—the ability to find the relationship between two different data structures without manual coding. Validation & Sanitiz...

    $8 / hr Average bid
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    16 bids

    ...Platform Integration We are developing platform, a marketplace platform with e-commerce and auction functionality. We already have: - Backend source code (ZIP file provided) - Completed frontend structure (HTML pages ready) We need an experienced Full-Stack Developer to integrate the frontend with the backend, build clean RESTful APIs, and deliver a secure, production-ready platform. - Scope of Work Review and improve backend structure if needed Build proper RESTful APIs for all frontend pages Connect frontend to backend (replace static data with dynamic APIs) Implement JWT authentication & role-based access (User / Supplier / Admin) Complete marketplace features (products, cart, checkout, orders) Implement auction system (bidding, auto-close, history) Bui...

    $215 Average bid
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    95 bids

    ...statistical computations, and dynamic result generation. This is a backend-heavy project requiring strong analytical skills and experience implementing structured business rules. The frontend will be developed in React JS, and the database will be MySQL. Technology Stack (Mandatory) : - Backend: PHP (Laravel Framework) Frontend: React JS (API consumption only) Database: MySQL API Type: RESTful APIs Architecture: Clean, scalable, and well-documented Scope of Work : - The developer will be responsible for: Designing and developing secure Gaming APIs in Laravel Implementing complex game result calculation logic Building statistical processing modules Creating endpoints for: Game results Statistics (daily / weekly / monthly / custom) Historical data Leaderboards (if...

    $751 Average bid
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    55 bids

    I'm looking for an experienced Node.js developer to create an API that interacts with a MySQL database. The API is intended for a web application I'm building. Key requirements: - Building a robust and scalable API - Integrating with MySQL databases Ideal skills and experience: - Proficiency in Node.js and API development - Strong experience with MySQL - Familiarity with RESTful or GraphQL API design - Good understanding of security practices in API development - Ability to write clean, maintainable code and documentation Please include examples of previous work.

    $119 Average bid
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    37 bids

    ...entrepreneurship). 2.8) AI interview feedback system suggesting weak areas, YouTube/Udemy courses, and mock tests. 3) Company Module: 3.1) View student profiles, resumes, projects, and posts. 3.2) Post jobs with role, skills, salary, eligibility, and deadline. 3.3) Collaborate with colleges for placement drives. 3.4) Real-time communication between company, student, and college. Technical Requirements: RESTful API architecture. Modular folder structure. Dashboard analytics with charts. Real-time notifications using Socket.io. Secure APIs, validation, and error handling. Scalable and deployment-ready architecture. Documentation & Deployment Requirements: - Provide complete 50–60 pages detailed project documentation including: - Introduction - Problem Statement - Obje...

    $127 Average bid
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    39 bids

    ...immediate hiring. The developer will work on an existing production codebase, create missing APIs, enhance and maintain current APIs, and ensure a clean and scalable backend architecture. You will collaborate closely with our Flutter frontend developer to ensure smooth API integration, performance optimization, and reliable data handling. The ideal candidate must have solid experience building RESTful APIs, managing authentication and authorization, optimizing database queries, and integrating generative AI solutions such as Google AI Studio (Gemini) and OpenAI into backend systems. Strong communication skills, clean coding practices, and the ability to quickly understand and extend an existing codebase are essential. To apply, please share a short Loom video walking us through A...

    $218 Average bid
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    40 bids

    ...Key Requirements 3+ years of experience with PHP and Laravel in SaaS application development. Proven expertise deploying Laravel apps on shared hosting environments (e.g., cPanel, hostgator, Bluehost, SiteGround) with Apache configuration. Proficiency in JavaScript, jQuery, Bootstrap, and Swiper for front-end functionality. Experience with toastr for notification handling. Strong knowledge of RESTful APIs, MySQL, and subscription billing integrations (e.g., Stripe, Razorpay, Paddle). Familiarity with Cloudflare for CDN and security optimization. Ability to troubleshoot and optimize apps in resource-constrained shared hosting environments. Strong understanding of web security (e.g., XSS, CSRF prevention) and performance optimisation. Preferred Skills Experience with for Larave...

    $39 Average bid
    $39 Avg Bid
    13 bids

    I have an existing front-end codebase for an Instagram-style app here: What I now need is a fully functional backend that plugs straight into that repo. Core requirement basic essentials. Sign up, login, post media, following, block, settings : change Email, c...straight into that repo. Core requirement basic essentials. Sign up, login, post media, following, block, settings : change Email, change Password, privacy, edit profile, logout, delete account. Tech stack guidance Please build against an SQL database (MySQL or PostgreSQL—whichever you prefer). Keep the schema clean and easy to migrate. The front end is written in React/TypeScript, so a RESTful or very lightweight GraphQL layer is fine as long as the endpoints are predictable.

    $153 Average bid
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    93 bids

    Terrace Office-Bedroom Smart Conversion My open terrace has to become a seamless blend of productive workspace and restful bedroom, each given equal importance. On the office side I need a thoughtfully placed workstation area with ergonomic furniture layout, ample power and data points, good task lighting and provision for smart controls. No separate meeting zone or large storage wall is required, though designs that can flex for future add-ons are welcome. The bedroom portion must center on a comfortable sleeping area that flows naturally from the work zone yet still feels private; built-in wardrobes or media units are optional extras if they can fit without crowding the plan. Overall, the look should feel modern, energy-efficient and “smart”—think automated l...

    $654 Average bid
    $654 Avg Bid
    39 bids

    ...(APIs, OAuth, Webhooks) Designing and developing the Admin User Interface (Admin UI) Delivering a professional and practical user experience The role requires someone who is truly skilled technically and design-wise, capable of thinking and executing at the same time. Key Responsibilities Backend Development Develop the application using: Node.js + Express or PHP + Laravel Design and implement RESTful APIs within the application Manage databases (MySQL / PostgreSQL) Build business logic Write clean, scalable, and maintainable code Optimize performance and handle errors API & Integration Integrate the application with: Salla APIs External systems (CRM, payment gateways, marketing tools) Handle: OAuth2 (Authorization Flow) Access & Refresh Tokens Webhooks (customer creat...

    $660 Average bid
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    149 bids

    ...and orchestrated on Kubernetes, with everything running in the cloud. Your focus will be twofold: 1. User-interface enhancements – i have idea , so you’ll translate those visuals into responsive, maintainable front-end code that plugs neatly into our micro-front-end architecture. 2. Back-end service extensions – you’ll design and code new micro-services or extend existing ones, exposing RESTful endpoints and integrating them into our event-driven ecosystem. We’ll collaborate through Git, conduct code reviews, and push continuously via our CI/CD pipeline. Clean code, solid test coverage, and clear documentation are non-negotiable so that our velocity stays high without sacrificing quality. If you’re comfortable pair-programming, worki...

    $381 Average bid
    $381 Avg Bid
    37 bids

    ...applications from the ground up. Your work will revolve exclusively around new feature development—no legacy maintenance—so you’ll get to shape architecture decisions, choose modern patterns, and drive best practices. We’re a fully remote company; you’ll collaborate daily with product managers, UX designers, and back-end engineers through Azure DevOps, Git, and Teams. A typical sprint involves designing RESTful APIs in ASP.NET Core, integrating them into a Xamarin or .NET MAUI front end, writing unit tests, and pushing clean, well-documented code through our CI/CD pipeline. To thrive here you should be fluent in C#, comfortable with SOLID principles, and confident optimizing performance for mobile workloads. Experience with cloud services (Azure Fu...

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

    ...Key Requirements 3+ years of experience with PHP and Laravel in SaaS application development. Proven expertise deploying Laravel apps on shared hosting environments (e.g., cPanel, hostgator, Bluehost, SiteGround) with Apache configuration. Proficiency in JavaScript, jQuery, Bootstrap, and Swiper for front-end functionality. Experience with toastr for notification handling. Strong knowledge of RESTful APIs, MySQL, and subscription billing integrations (e.g., Stripe, Razorpay, Paddle). Familiarity with Cloudflare for CDN and security optimization. Ability to troubleshoot and optimize apps in resource-constrained shared hosting environments. Strong understanding of web security (e.g., XSS, CSRF prevention) and performance optimisation. Preferred Skills Experience with for Larave...

    $110 Average bid
    $110 Avg Bid
    23 bids

    ...features I want working from day one: • Remote control via app – low-latency commands to each device, with acknowledgements coming back to the UI. • Automated routines – time- or sensor-driven rules that run even when the user’s phone is offline. • Real-time monitoring – live status dashboards plus historical logging for later analytics. You’re free to choose the stack, but MQTT, WebSockets, RESTful APIs and a modern backend language (Node.js, Python or similar) make sense here. The code must be well-structured, container-ready and include straightforward deployment instructions so I can spin up new environments quickly. Security, authentication and OTA update hooks are all part of the brief. Hand-over package: full source, sch...

    $631 Average bid
    $631 Avg Bid
    96 bids

    ...scale cutting-edge web applications. You will work with the MERN stack and other modern technologies to design, develop, and deploy scalable systems, collaborating closely with product managers, designers, and cross-functional teams. Key Responsibilities: Design, develop, test, and deploy robust, scalable, and high-performance web applications. Build and maintain efficient server-side logic and RESTful microservices using Node.js, , and TypeScript. Create and manage MongoDB schemas, optimize queries, and ensure database scalability. Collaborate with front-end developers to integrate React components and APIs seamlessly. Implement security, authentication, and data protection best practices. Contribute to system architecture and design discussions to ensure scalability and mainta...

    $858 Average bid
    $858 Avg Bid
    48 bids

    We operate a Python-b...make the system more robust, faster, or easier to maintain – Working within a Dockerized environment and following existing code conventions Ideal Candidate – Strong hands-on experience with Playwright in Python, particularly using the async API – Comfortable working with headless browsers, managing browser contexts, and debugging flaky or timing-sensitive automation – Familiar with FastAPI and RESTful API design – Experience with MongoDB or similar document-based databases – Able to read, understand, and contribute to an existing codebase without extensive onboarding – Self-directed and comfortable working independently with minimal supervision – Communicative, responsive, and dependable — we value peopl...

    $26 / hr Average bid
    $26 / hr Avg Bid
    140 bids

    ...applications from the ground up. Your work will revolve exclusively around new feature development—no legacy maintenance—so you’ll get to shape architecture decisions, choose modern patterns, and drive best practices. We’re a fully remote company; you’ll collaborate daily with product managers, UX designers, and back-end engineers through Azure DevOps, Git, and Teams. A typical sprint involves designing RESTful APIs in ASP.NET Core, integrating them into a Xamarin or .NET MAUI front end, writing unit tests, and pushing clean, well-documented code through our CI/CD pipeline. To thrive here you should be fluent in C#, comfortable with SOLID principles, and confident optimizing performance for mobile workloads. Experience with cloud services (Azure Fu...

    $795 Average bid
    $795 Avg Bid
    68 bids

    ...Key Requirements 3+ years of experience with PHP and Laravel in SaaS application development. Proven expertise deploying Laravel apps on shared hosting environments (e.g., cPanel, hostgator, Bluehost, SiteGround) with Apache configuration. Proficiency in JavaScript, jQuery, Bootstrap, and Swiper for front-end functionality. Experience with toastr for notification handling. Strong knowledge of RESTful APIs, MySQL, and subscription billing integrations (e.g., Stripe, Razorpay, Paddle). Familiarity with Cloudflare for CDN and security optimization. Ability to troubleshoot and optimize apps in resource-constrained shared hosting environments. Strong understanding of web security (e.g., XSS, CSRF prevention) and performance optimisation. Preferred Skills Experience with for Larave...

    $70 Average bid
    $70 Avg Bid
    41 bids

    ...backend architecture, work closely with the frontend team on API integration, and help migrate legacy C#/.NET code to a modern Node.js stack. This is a long-term engagement with room to grow as the platform scales. **Core Responsibilities** - Design and build scalable backend architecture using NestJS and TypeScript - Database design and optimization with PostgreSQL + TypeORM / Prisma - Implement RESTful APIs, JWT authentication, CQRS, and Clean Architecture principles - Integrate Firebase Auth and push notifications - Set up and manage MinIO / AWS S3 file storage - Containerization and deployment management using Docker - Collaborate with frontend team on API integration - Migrate legacy C#/.NET codebase to Node.js - Write unit and integration tests; participate in code revie...

    $20 / hr Average bid
    $20 / hr Avg Bid
    203 bids

    ...records in real time, perform full CRUD on member and contribution data, and expose filtered datasets for simple exports. A clear audit trail for every change is essential, as is role-based permissioning on each data operation. I am open to PHP, Django, or Node.js on the server side as long as the final codebase is cleanly structured, documented, and easy to maintain. Responsive front-end screens, RESTful APIs, and secure session handling all form part of the scope. Deliverables • Complete source code with comments • Normalised MySQL schema and seed data • Brief deployment script or Dockerfile • One-page user guide covering the data-management workflow I’ll review work against the ability to ingest sample pension files, manipulate records wi...

    $25 / hr Average bid
    $25 / hr Avg Bid
    141 bids

    I need an Android developer to modify the API of my existing application. Ideal skills and experience: - Strong experience with Android development - Proficiency in working with APIs (RESTful, GraphQL, or SOAP) - Ability to understand and implement API documentation - Experience in modifying or updating app functionalities

    $939 Average bid
    $939 Avg Bid
    65 bids

    I’m looking for an extra set of hands on the backend side of my project. Everything we build is written in Python and centres on clean, well-documented RESTful APIs. You’ll pick up tickets that range from adding new endpoints to refactoring existing ones for better performance, always working in a Git-based workflow and submitting pull requests for review. Day-to-day you’ll: • Implement or extend API endpoints in Python (we’re using Flask and FastAPI right now). • Write concise unit tests so every new piece of code ships with coverage. • Document each endpoint clearly in OpenAPI / Swagger so the frontend team can integrate without guesswork. Acceptance criteria for each ticket will be: the new endpoint passes automated tests, meets PEP...

    $30 Average bid
    $30 Avg Bid
    43 bids

    ...end-to-end product development: planning features with our product managers, writing clean and well-documented code, performing peer reviews, and shipping stable releases on a regular sprint cycle. We handle both web and mobile solutions, so a strong command of at least one modern back-end language (Java, Python, Node.js) and a front-end framework (React, Angular, or Vue) is essential. Familiarity with RESTful API design, Git-based workflows, and cloud deployment (AWS or Azure) will help you hit the ground running from day one. Successful delivery means: • Contributing production-ready modules that pass our automated CI/CD pipeline and peer review • Documenting architecture decisions in concise technical notes • Pairing with junior developers to share best practic...

    $1567 Average bid
    $1567 Avg Bid
    116 bids

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