Javascript Developers for hire in United States
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Hire Herculesz
Principal / Head AI & Full-Stack Engineer with 25+ years of experience architecting, building, and scaling complex software systems across web, mobile, cloud, CMS/eCommerce, and AI-driven platforms. I specialize in delivering production-ready applications from concept to launch, including SaaS platforms, marketplaces,...Principal / Head AI & Full-Stack Engineer with 25+ years of experience architecting, building, and scaling complex software systems across web, mobile, cloud, CMS/eCommerce, and AI-driven platforms. I specialize in delivering production-ready applications from concept to launch, including SaaS platforms, marketplaces, admin dashboards, mobile applications, automation systems, APIs, CMS websites, eCommerce stores, and intelligent AI-powered workflows. I bring a strong combination of full-stack engineering, cloud architecture, DevOps, CMS/eCommerce development, and AI/LLM expertise, with a proven ability to transform complex business requirements into scalable, secure, and user-focused digital products. My experience covers frontend architecture, backend engineering, database design, third-party integrations, real-time systems, performance optimization, CI/CD, observability, and production deployment. Technical Expertise: Frontend: React, Next.js, Vue.js, TypeScript, JavaScript, Tailwind CSS, Material UI, responsive UI/UX implementation Backend: Node.js, NestJS, Express.js, Laravel, PHP, Python, REST APIs, GraphQL, microservices, server-side architecture Mobile: Flutter, React Native, Expo, iOS, Android, cross-platform mobile app development CMS & eCommerce: WordPress, WooCommerce, Shopify, Wix, Webflow, custom theme development, plugin/app integrations, payment setup, product catalogs, checkout flows, landing pages, blog systems, and SEO-friendly website architecture Databases: PostgreSQL, MySQL, MongoDB, Firebase Firestore, Supabase, Redis, database design, optimization, migrations, and data modeling Cloud & DevOps: AWS, Google Cloud, Azure, DigitalOcean, Docker, Kubernetes, Nginx, CI/CD, GitHub Actions, server deployment, monitoring, logging, and observability AI & LLMs: OpenAI API, LangChain, RAG pipelines, AI copilots, conversational agents, semantic search, embeddings, prompt engineering, fine-tuning, Pinecone, pgvector, vector databases, and agentic workflows Payments & Integrations: Stripe, PayPal, Twilio, SendGrid, Firebase, Google APIs, third-party APIs, webhooks, CRM integrations, automation platforms, and API-based business workflows I have a strong track record of designing and delivering scalable SaaS platforms, marketplace systems, mobile apps, admin dashboards, CMS websites, eCommerce stores, automation tools, and AI-driven products that support real business operations. My work combines clean frontend experiences, secure backend systems, optimized databases, cloud-ready infrastructure, flexible CMS solutions, and practical AI innovation. As a hands-on technical leader, I am experienced in mentoring engineers, leading cross-functional teams, making architecture decisions, and aligning technical execution with business goals. I am passionate about building high-quality software that is scalable, maintainable, and ready for real-world users. less -
Hire CorranForce
CorranForce CorranForce
$70 USD / hour
Web & Mobile Apps | Servers, AI & CybersecurityUnited StatesYour processes shouldn't be slow, manual, or expensive! Most projects don't fail from bad ideas — they fail between the idea and the execution: the prototype that never ships, the automation that breaks in week two, the app that works but nobody can maintain. We exist to close that gap. 🤖 AI & Automation AI...Your processes shouldn't be slow, manual, or expensive! Most projects don't fail from bad ideas — they fail between the idea and the execution: the prototype that never ships, the automation that breaks in week two, the app that works but nobody can maintain. We exist to close that gap. 🤖 AI & Automation AI features built into real products: chatbots, assistants, document processing, predictive tools Business automation with GPT, n8n, Make & Zapier — repetitive work, eliminated Automated trading systems for Forex and crypto (MT4/5, NinjaTrader, Pine Script) 💻 Web & Mobile Engineering Web applications with modern, scalable architecture — from MVP to production Cross-platform iOS & Android apps (React Native, Flutter) Responsive websites with brand-consistent UI/UX 2D/3D games for web, mobile, and desktop (Unity, Unreal Engine) 🏢 Business Systems & Data ERP & CRM implementation tailored to your operations (Odoo specialists — custom modules, reports, integrations) Interactive Power BI dashboards fed by automated data pipelines Document workflow automation across Microsoft Office — templates, macros, scripting 🎨 Design & Publishing Product design from wireframe to polished interface Book design: covers, illustrations, and print/digital formats for Amazon KDP, IngramSpark, EPUB & PDF ✅ How we work: every project gets a written scope, staged milestones, and source code + documentation at handover. We build things you own and can maintain — not black boxes that keep you dependent. Whether you're a startup shipping your first product or an established business drowning in manual work — tell us what you're trying to build, and we'll break down exactly how we'd deliver it. less -
Hire diektech
Exceed Your Expectation! Let's Do It Together!! Hi, I'm Elias, founder of Reupped Technologies LLC. Most software projects don't fail because of poor development—they fail because the wrong problems are solved first. That's why every project begins by understanding your business, your users, and the workflow behind...Exceed Your Expectation! Let's Do It Together!! Hi, I'm Elias, founder of Reupped Technologies LLC. Most software projects don't fail because of poor development—they fail because the wrong problems are solved first. That's why every project begins by understanding your business, your users, and the workflow behind the idea before writing a single line of code. For more than 20 years, I've helped startups, entrepreneurs, and established businesses build software that is reliable, scalable, and designed to grow with them. Whether it's a SaaS platform, AI-powered application, mobile app, marketplace, ERP, CRM, fintech product, or custom business system, my focus is always the same: build software that solves real problems while keeping future growth in mind. My team and I handle the complete development process, including: • Product planning • UI/UX • Web development • Mobile apps • Backend architecture • API integrations • AI solutions • Cloud deployment • Long-term support What clients appreciate most isn't just our technical expertise—it's our ability to simplify complex ideas, ask the right questions, and recommend solutions that make sense for the business. If you're looking for a development partner who values communication, thoughtful planning, and long-term success just as much as clean code, I'd be happy to discuss your project. less -
Hire johnnier3
Hi, I'm Johnnie Reece, a Preferred Freelancer and senior full-stack engineer. For 10+ years I've shipped web, mobile, and emerging tech for startups and Fortune 500 companies, on time and without surprises. What I build: - Pixel-perfect web and mobile apps (React, Next.js, React Native, Flutter) scoring 98-100 on...Hi, I'm Johnnie Reece, a Preferred Freelancer and senior full-stack engineer. For 10+ years I've shipped web, mobile, and emerging tech for startups and Fortune 500 companies, on time and without surprises. What I build: - Pixel-perfect web and mobile apps (React, Next.js, React Native, Flutter) scoring 98-100 on Lighthouse - Secure, scalable backends in Node.js/NestJS, Java/Spring Boot, .NET, and Python - High-performance Shopify and WordPress stores, custom apps, and headless setups - Blockchain dApps, smart contracts, and Web3 integrations - Automation bots, scrapers, and AI workflows - AWS infrastructure with 99.99%+ uptime and auto-scaling How I work: Daily updates, live demos, direct access (no middlemen). I act as your technical partner, flagging risks early and writing clean, documented code built to last. Clients come back because I ship faster, cleaner, and more reliably. Ready to start? Message me. I reply fast and can begin immediately. less -
Hire Hubready
A US-based engineering team — in business since 2008, registered in South Florida. Clients bring us in when systems become too complex, too slow, or unreliable — or when an AI idea needs to become a real, production-ready product, not just a prototype. We don't just write code — we build systems that work in the...A US-based engineering team — in business since 2008, registered in South Florida. Clients bring us in when systems become too complex, too slow, or unreliable — or when an AI idea needs to become a real, production-ready product, not just a prototype. We don't just write code — we build systems that work in the real world. We're a senior Full-Stack & AI engineering team with deep experience designing, building, and scaling production-grade software across AI automation, SaaS platforms, data pipelines, and high-volume e-commerce. We bring both an engineering and a business mindset, so what we deliver is technically sound, maintainable, and ROI-driven. ✓ What we do best – AI & Automation • LLM integrations (OpenAI, RAG pipelines, embeddings, copilots) • Intelligent workflow automation and data processing • AI-powered internal tools and dashboards • Zapier, n8n, Selenium, Python, Beautiful Soup • Stock trading algorithms/bots for Schwab, E*TRADE, and more – Backend & Data Engineering • Custom APIs and event-driven architectures • PostgreSQL at scale (partitioning, optimization, analytics) • ETL pipelines across Shopify, Salesforce, ERP, and custom systems • Node.js, Python, TypeScript – Frontend Development & UX • Modern, responsive frontends built for real users • React, Next.js, and component-driven UI architecture • Data-heavy dashboards built for performance • Clean UI/UX that balances usability, speed, and clarity – Mobile App Development • Cross-platform apps for iOS & Android • React Native, Flutter, and modern mobile stacks • Secure API integration and real-time data sync • Built for performance, stability, and growth – Cloud, DevOps & Reliability • Docker / Podman, CI/CD pipelines, secure deployments • Observability, logging, and performance tuning • Systems designed to scale without constant maintenance ✓ How we work • Clear communication and structured milestones • Production-ready code — no shortcuts or fragile builds • Proactive technical guidance when we see risks or better paths • Long-term thinking: solutions that grow with your business Working with a US company since 2008 means accountability, clear English-language communication, and a team that's still here to support what we build. If you need a senior team that can own frontend, backend, data, mobile, and AI end-to-end — and deliver clean, scalable results — let's build it right. Message us with your project and we'll tell you honestly how we'd approach it. less -
Hire programmatis
Let’s bypass the part where we pretend you just need a standard "developer." If you wanted a generic template or a massive, slow-moving agency, you’d be on a different page. I operate at the intersection of high-end web architecture and brutal technical honesty. For nearly two decades, I’ve been stepping in as a...Let’s bypass the part where we pretend you just need a standard "developer." If you wanted a generic template or a massive, slow-moving agency, you’d be on a different page. I operate at the intersection of high-end web architecture and brutal technical honesty. For nearly two decades, I’ve been stepping in as a fractional CTO / CIO and elite engineer to rescue projects, build rock-solid digital infrastructure, and design scalable systems that don't break under pressure. No hand-holding required, no outsourced communication delays, and absolutely no fluff. Just bulletproof code and strategic execution. You get a senior partner, not just another ticket-taker. Services: Fractional CTO & Tech Strategy - Stop guessing your tech stack. I align your business goals with scalable architecture, map out development roadmaps, and keep you from burning cash on technical debt. High-End Web Application Engineering - From custom enterprise hubs to sleek progressive web apps (PWAs). I build secure, blazing-fast, digital infrastructure that doesn't buckle under heavy user traffic. Legacy Codebase Rescues - Inherited a digital nightmare from a budget agency? I audit, untangle, and stabilize broken codebases, turning technical liabilities back into business assets. Performance & Speed Optimization - No one waits for slow apps to load. I overhaul rendering paths, optimize databases, and strip away the bloat to maximize your conversion rates and SEO. API Design & System Integration - Connecting your disparate software systems seamlessly. I build secure, bulletproof APIs and integrations that ensure your data flows exactly where it needs to. UX/UI Technical Architecture - Bridging the gap between beautiful design and brilliant engineering. I turn complex user flows and high-end, dark-mode aesthetics into pixel-perfect frontend reality. less -
Hire kareemmaize
Great software starts with more than good code. It takes the right architecture, clear technical decisions, and someone who can carry the product from idea to production without losing sight of the business goal. I’m a Senior Full-Stack & AI Engineer with 10+ years of experience building complex web platforms, mobile...Great software starts with more than good code. It takes the right architecture, clear technical decisions, and someone who can carry the product from idea to production without losing sight of the business goal. I’m a Senior Full-Stack & AI Engineer with 10+ years of experience building complex web platforms, mobile applications, AI-powered products, enterprise systems, and connected-device solutions. Core Expertise: React / Next.js, Node.js / NestJS, Python / FastAPI, .NET, Laravel, Flutter, React Native, Kotlin | AI / LLM / RAG | SaaS Platforms | Cloud Architecture | Embedded & IoT | ESP32, Arduino, BLE / GATT, MQTT What I Can Build: ✅ AI & Intelligent Automation LLM-powered applications, RAG systems, AI assistants, document processing, workflow automation, predictive solutions, and AI integrations ✅ SaaS & Full-Stack Platforms Marketplaces, subscription platforms, payment systems, dashboards, admin portals, role-based applications, and real-time products ✅ Mobile Applications iOS and Android apps, Flutter, React Native, native Android, BLE-connected apps, subscriptions, in-app purchases, and store release support ✅ Embedded & IoT Solutions ESP32, Arduino, BLE/GATT, MQTT, sensors, firmware integration, device control, telemetry, OTA workflows, and device-to-cloud systems ✅ Enterprise & Third-Party Integrations ERP/CRM integrations, SharePoint, NetSuite, Stripe, Supabase, APIs, automation platforms, cloud services, and custom business workflows ✅ Production Engineering Existing codebase audits, architecture improvements, performance optimization, security hardening, deployment, release issues, and complex debugging How I Work I take ownership of the technical side of a project, communicate clearly, and focus on building solutions that are reliable, maintainable, and ready for real users. Whether you’re starting with an idea, scaling an existing product, or dealing with a system that needs experienced technical direction, I can step in and move it forward. If you’re looking for an engineer who can understand the bigger picture, handle the difficult technical details, and deliver with confidence, send me your project requirements and let’s build it the right way. less -
Hire codefusion53
I’m Justin, a results-driven AI and Web Developer with a strong background in building intelligent, scalable, and user-focused applications. I specialize in: - AI & Machine Learning – custom models, chatbots, NLP, data automation, and predictive analytics - Web Development – full-stack applications, SaaS platforms,...I’m Justin, a results-driven AI and Web Developer with a strong background in building intelligent, scalable, and user-focused applications. I specialize in: - AI & Machine Learning – custom models, chatbots, NLP, data automation, and predictive analytics - Web Development – full-stack applications, SaaS platforms, e-commerce, and API integrations - Automation – streamlining workflows with AI, APIs, and custom scripts to save time and cut costs My approach is simple: I listen carefully, design smart solutions, and deliver high-quality results on time. Whether you need an AI-powered tool, a modern web platform, or a long-term development partner, I can bring your vision to life. Let’s collaborate to turn your ideas into reliable, high-performing solutions. less -
Hire briannnelson
briannnelson briannnelson
$60 USD / hour
Full-Stack Web & Mobile App Developer | 10+ yearsUnited StatesWith over 10 years of hands-on experience developing and scaling web applications across the insurance, telecom, and restaurant tech industries, I help businesses turn complex requirements into clean, maintainable, and high-performance code. I’m passionate about modernizing legacy systems — from migrating SQL stored...With over 10 years of hands-on experience developing and scaling web applications across the insurance, telecom, and restaurant tech industries, I help businesses turn complex requirements into clean, maintainable, and high-performance code. I’m passionate about modernizing legacy systems — from migrating SQL stored procedures to Node.js + MongoDB, to rebuilding jQuery/PHP frontends into fast, SEO-friendly Next.js applications. I stay current with industry best practices and love solving problems that truly impact users and business metrics. Whether you need a landing page for A/B testing, a complete frontend overhaul, REST API development, or CI/CD pipeline setup — I deliver production-ready code with attention to performance, testing, and scalability. 𝐂𝐨𝐫𝐞 𝐂𝐨𝐦𝐩𝐞𝐭𝐞𝐧𝐜𝐢𝐞𝐬 - Frontend: React, TypeScript, Next.js (SSR/SSG), Vite.js, JavaScript, jQuery, HTML5, CSS3, SASS, Tailwind CSS, Bootstrap - Mobile: React Native, Ionic Framework, Swift, Flutter - Backend: Node.js, Express.js, REST APIs, MongoDB, PostgreSQL, SQL, PHP - Desktop: Electron.js - Testing & Optimization: Unit Testing, E2E Testing, A/B Testing - DevOps & Cloud: CI/CD pipelines, AWS, Azure, Google Cloud Platform, Vercel, Bitbucket - State Management: Redux, React Hooks, React Context - CMS & SEO: WordPress, Open Graph - Tools: Git, GitHub, npm, Postman, Sentry, Auth0, Axios 𝐖𝐡𝐲 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞? ✅ Fast learner — I adapt quickly to your stack and codebase. ✅ 13+ years of real-world, full-cycle development experience. ✅ Strong communicator — worked with onshore and offshore teams. ✅ Focus on best practices, testing, and performance. ✅ Available for short-term fixes, long-term collaborations, or legacy migrations. 𝐀𝐯𝐚𝐢𝐥𝐚𝐛𝐢𝐥𝐢𝐭𝐲 Open to both fixed-price and hourly contracts. Flexible with time zones (experience with US-based and international teams). less -
Hire skysystemsinc
skysystemsinc skysystemsinc
$30 USD / hour
Web & Mobile Apps | UX/UI | CMS Development | OdooUnited StatesWelcome to our Profile! Your Gateway to Exceptional Digital Experiences! We are a digital Agency known as Sky System, Inc. based in Raleigh, NC, USA. We are new to this platform but you can easily find us on other platforms with good reviews and ratings. We are a dynamic team of expert full-stack developers, UX/UI...Welcome to our Profile! Your Gateway to Exceptional Digital Experiences! We are a digital Agency known as Sky System, Inc. based in Raleigh, NC, USA. We are new to this platform but you can easily find us on other platforms with good reviews and ratings. We are a dynamic team of expert full-stack developers, UX/UI designers, SEO engineers, QA engineers, and Project Managers. Our skills span across various domains, with particular expertise in: ⭐ UX/UI Designing: Figma, AdobeXD, Sketch, and InVision Studio. ⭐ CMS: WordPress, Shopify, Webflow, Wix, and Squarespace. ⭐ Frontend - JavaScript/Typescript, HTML/CSS, Tailwind CSS, React, React Native, Flutter, Next, Vue, and Angular. ⭐ Backend - Node.js, Nest.js, PHP/Laravel. ⭐ Databases - MongoDB, MySQL, NoSQL, and PostgreSQL. ⭐ Cloud services - AWS. ⭐ Tools - Git, GitHub, bug trackers, Jira. We have extensive experience collaborating with various startups, medium-sized enterprises, and large-scale businesses across diverse industries. Also, we have great expertise in creating custom coding platforms/Software such as ✅ Non-Profit, Crowdfunding, NGO ✅ HRM, Payroll, Workforce Management system ✅ Task Management system / Project Management system ✅ Real Estate Investor/ Agent Portals ✅ Healthcare / TeleHealth / Doctor / Patient Portal ✅ Job Board ✅ E-commerce Marketplaces ✅ SaaS platforms ✅ ERP and CRM System Why Choose Us for Your Business? 1. Innovative Excellence: Elevate your business with our innovative solutions, setting you apart in the market. 2. Client-Centric Approach: Your success is our focus. We tailor services to meet your unique needs for a personalized experience. 3. Proven Track Record: Trust in our expertise with a proven track record of successful projects and satisfied clients. 4. Timely Delivery, Quality Results: Expect on-time delivery without compromising on the quality of our work, ensuring your project's success. Let's collaborate and elevate your digital presence to new heights! Whether it's a stunning website, an efficient e-commerce platform, or a robust application, we are here to turn your ideas into reality. Regards, Team Sky Systems, Inc. less
