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Mujtaba S.

Lahore, Pakistan

$40/hr
4.9
78 jobs

Need AI added to your app, a workflow automated, or an MVP finished? I can help you scope it, build it, and ship it without overcomplicating the first milestone. I build AI products that survive real users, real data, and real business workflows: SaaS MVPs, AI agents, RAG systems, voice AI, and automation inside existing products. ⭐ Top Rated Plus | Top 3% of performers on Upwork ✅ 10+ years building SaaS and AI products | 100+ projects delivered ✅ AI that ships: RAG, AI agents, MCP, Voice AI, LLM integration ✅ Full stack: Next.js, React, TypeScript, Python, Node.js, PostgreSQL, AWS ✅ SaaS, MVPs, automation, fintech, healthcare, construction, legal tech, and sales products You can hire me when: - You need one AI feature added to an existing app - You want OpenAI, Claude, Gemini, or MCP integrated into your product - You need a RAG system over PDFs, documents, knowledge bases, or internal data - You want a voice AI agent for calls, bookings, lead qualification, or CRM updates - You have a workflow involving documents, calls, follow-ups, data entry, or reporting that should be automated - Your MVP is half-built, buggy, slow, or stuck before launch - You need someone to build a full SaaS product from idea to deployment I work well on both small and large projects. If the right first step is a quick audit, prototype, bug fix, integration, or one-week milestone, I will tell you that. If the project needs a full build, I can own the architecture, frontend, backend, AI layer, deployment, and documentation. The part most AI freelancers skip: AI is rarely the whole product. It usually needs a backend, dashboard, auth, billing, permissions, logs, human review, and deployment around it. I build both the AI layer and the product around it. WHAT I DO: - AI SaaS & MVP builds: idea to deployed product with auth, billing, dashboards, and AI layer - AI inside existing products: RAG, agents, MCP, LLM features, document AI, and automation - Voice AI: agents that answer calls, book appointments, qualify leads, and log to your CRM - RAG and document AI: source-grounded answers, OCR, extraction, citations, and review queues - Workflow automation: documents, follow-ups, data entry, reporting, and API integrations - Rescue & ship: half-built MVPs refactored, hardened, and launched RECENT DELIVERIES: - AI sales CRM: call transcription, follow-up automation, multi-tenant pipelines - RAG document platform with every answer cited to source - AI financial intelligence platform: open banking + accounting sync into one ledger - AI voice agents for healthcare and sales, answering real calls daily - Turnkey B2B SaaS platform for the construction industry, end to end HOW I WORK: - I start by understanding the workflow, users, data, and business goal - I suggest the smallest useful first milestone when possible - I scope clearly before code is written, so you know cost and timeline up front - I can work on focused tasks, short prototypes, rescue work, or full product builds - I work full time on Upwork with overlap for US and European business hours If you need one AI feature, a quick prototype, a stuck MVP fixed, or a full SaaS product built, send me a short description of what you have and what you want it to do. I will reply with the clearest next step, the likely scope, and the first milestone I would recommend. Tech Stack: AI and LLM: OpenAI, Claude, Gemini, LangChain, LangGraph, CrewAI, MCP, function calling, model routing RAG and vector search: RAG pipelines, embeddings, semantic search, pgvector, Pinecone, document AI, OCR AI agents and automation: multi-agent systems, AI copilots, workflow automation, document extraction with review queues AI reliability: evaluation sets, hallucination reduction, human-in-the-loop workflows Voice AI: Vapi, Retell, ElevenLabs, Deepgram, OpenAI Realtime, Twilio Frontend: Next.js, React, TypeScript, Tailwind CSS, React Native Backend: Node.js, Python, FastAPI, REST and GraphQL APIs, WebSockets Databases: PostgreSQL, Supabase, Redis, MongoDB SaaS architecture: multi-tenant, tenant isolation, RBAC, Stripe billing, admin dashboards Cloud and DevOps: AWS, Docker, Vercel, CI/CD, monitoring Security and compliance: OAuth2, JWT, encryption, audit logs, HIPAA-aware builds, KYC/AML flows Integrations: Stripe, Plaid, open banking APIs, QuickBooks, Xero, Twilio, CRMs, ERPs Industries: AI SaaS, AI agents, document AI, RAG, FinTech, open banking, healthcare, B2B SaaS, startup MVPs, construction tech, legal tech, sales and CRM automation, voice AI, recruiting

  • React
  • Full-Stack Development
  • AI App Development
  • SaaS Development
  • Artificial Intelligence
  • AI Agent Development
  • Next.js
  • Python
  • Node.js
  • TypeScript
  • OpenAI API
  • Large Language Model
  • Retrieval Augmented Generation
  • LangChain
  • AI Model Integration
  • API Integration
  • Stripe
  • PostgreSQL
  • Minimum Viable Product
  • AWS Development
Mykhailo D.

Lviv, Ukraine

$39/hr
4.9
86 jobs

⭐️𝐒𝐞𝐧𝐢𝐨𝐫 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐝𝐞𝐯 𝐰𝐡𝐨 𝐰𝐫𝐢𝐭𝐞𝐬 𝐜𝐨𝐝𝐞 𝐲𝐨𝐮𝐫 𝐟𝐮𝐭𝐮𝐫𝐞 𝐭𝐞𝐚𝐦 𝐰𝐨𝐧'𝐭 𝐜𝐮𝐫𝐬𝐞. 💡 130+ production-grade products delivered (SaaS, MVPs, AI systems, marketplaces) 💰 $16.5M+ revenue generated by client products 👥 157K+ active users powered by systems I built ⚡ 1M+ API requests/month at 99.9% uptime 🚀 MVP → production in 2–6 weeks, architected to scale from day one 🔥 WHAT I DO You're building a SaaS, MVP, or AI-powered product. You need a Full Stack Developer who can own React frontend and Node.js backend end-to-end, ship in weeks (not quarters), and write code your future team won't throw away. That's what I do. Early-Stage MVP, Productionizing a prototype, Scaling a Live SaaS Platform, or Legacy Codebase rebuild - I've built this on React, Next.js, Node.js, TypeScript, Supabase, PostgreSQL, AWS over 10+ years. 🔥 ROLES I TAKE ON (10+ YEARS EXPERIENCE) ✔ Full Stack Developer / Full Stack Engineer — 40+ end-to-end SaaS platforms (React + Node.js), 10+ years ✔ Frontend Developer / Front-End Developer — 30+ production UI builds, 10+ years ✔ React Developer / React.js / ReactJS Developer — scalable React apps since 2015, 10+ years ✔ Node.js / NodeJS Developer / Backend Developer — 25+ APIs, 1M+ req/month, 10+ years ✔ Vue.js Developer / Nuxt.js Developer — 8+ Vue projects, 8+ years ✔ Next.js Developer / NextJS Developer — 15+ SSR/SSG SaaS platforms, 7+ years ✔ TypeScript Developer / JavaScript Developer — 50+ typed and untyped JS codebases, 10+ years ✔ SaaS Developer / Web Application Developer / Web App Developer — MVP to scale, 10+ years ✔ Lead Frontend Engineer / Senior Full Stack Engineer — team leadership on 18+ projects 🔥 INDUSTRIES I SERVE ⚖️ For LegalTech founders — 6+ Case Management Systems, Document Workflows, Client Portals, Compliance SaaS 🏥 For Healthcare & MedTech — 8+ Patient Platforms, Telehealth, HIPAA-Compliant data, Clinic Management SaaS 📦 For Logistics & supply chain — 5+ Logistics Platforms, real-time tracking (sea/air/truck), Project44, INTTRA, EDI 🛒 For Marketplace & e-commerce — 15+ Multi-Vendor Marketplaces, B2B & Two-Sided Marketplace, Stripe, bidding, complex search 🤖 For AI startups — 12+ AI-Powered products: OpenAI / Claude API / LLM, RAG Chatbots, AI Agent Platforms, vector DBs, FastAPI, browser extensions 📝 For No-code & enterprise SaaS — 10+ Form Builders, Admin Dashboards, Internal Tools, Microservices, Multi-tenant 🌐 For Media, AdTech & publishing — 6+ Publisher Platforms, CMS, payment gateways, Analytics Dashboards 🏠 For Real estate & PropTech — Property Listings, Bidding & Auction systems, Agent Dashboards 💰 For FinTech founders — Stripe Connect, subscription billing, multi-currency, KYC, Fintech MVP 📚 For EdTech — course delivery, student dashboards, progress tracking, live sessions 🔥 RESULTS I DELIVER ✔ MVP → production in 2–6 weeks, 35% fewer bugs, 5–8 weeks shorter delivery cycle ✔ Frontend: LCP under 1.5s, Lighthouse 90+, bundle reduced 40%, 18–27% engagement uplift ✔ Backend: 1M+ API requests/month, 99.9% uptime, 40–60% lower latency ✔ Database: 3–5x faster response, 70% less DB load; 90% faster workflows, 65% fewer back-office actions ✔ +30% conversion on React / Next.js apps; 15–22% better marketplace lead quality ✔ 15,000+ shipment operations/month, 2,423+ completed orders, 30,000+ healthcare users ✔ 20+ SaaS MVPs launched, 47% fewer bugs in legacy modernization 🔥 HOW I WORK I think like a product engineer, not a code-monkey. Before writing a line, I align on the business outcome — who the user is, what they pay for, where the product needs to be in 6 months. Then I ship in weekly demos and stay available on Slack / Telegram for fast turnaround. Typical cycle: 1️⃣ Discovery & scoping (2–3 days) — define MVP boundary 2️⃣ Architecture — clean foundations, scalable schema, right stack 3️⃣ Weekly sprints with demos — progress every week 4️⃣ Production launch — CI/CD, monitoring, error tracking 5️⃣ Post-launch support — most clients keep me on 🔥 TECH STACK Frontend: React.js, ReactJS, React Hooks, Next.js, NextJS, Vue.js, Nuxt.js, TypeScript, Redux, Zustand, Tailwind CSS, shadcn/ui Backend: Node.js, NodeJS, Express.js, NestJS, Python, FastAPI, REST, GraphQL, WebSockets Database: PostgreSQL, Supabase, MongoDB, MySQL, Redis, Prisma Supabase: Auth, Row-Level Security, Edge Functions, Realtime, Storage AWS: Lambda, S3, RDS, EC2, CloudFront, API Gateway, SQS, SNS, Cognito, ECS Other cloud: Firebase, Vercel, Netlify, Cloudflare AI / ML: OpenAI API, Claude API, LangChain, RAG, RAG Chatbot, AI Agent, pgvector, Computer Vision Payments: Stripe Subscriptions, Stripe Connect, Stripe Checkout, Stripe Billing, PayPal Integrations: Twilio, SendGrid, Resend, Slack API, Telegram Bot API, EDI, Project44, Mobile: React Native, React Native Expo, iOS / Android DevOps: Docker, GitHub Actions, CI/CD, Sentry 🚀 Building a SaaS, MVP, marketplace, or AI-powered product? Click "Invite" or "Hire" and send the brief.

  • React
  • React Native
  • JavaScript
  • HTML
  • CSS
  • HTML5
  • Node.js
  • Bootstrap
  • jQuery
  • CSS 3
  • Vue.js
  • Nuxt.js
  • Front-End Development
  • Next.js
  • MongoDB
  • Redux
  • TypeScript
  • React Bootstrap
  • Python
  • Software Development
Oleksandr M.

Kryvyy Rih, Ukraine

$25/hr
5.0
6 jobs

I don't build apps that "should" work at scale. I build ones that do, frontend and backend, and I can show you the numbers. Most developers ship something that looks fine in a demo and then falls apart under real traffic, real data, and real users. That's the gap I get paid to close. Seven years as a Full-Stack Developer across React, Next.js, Node.js, NestJS, and React Native, 100% Job Success Score, covering frontend, backend, databases, and integrations end to end, so you're not stuck coordinating between three different specialists for one project. Recent proof: an e-commerce rebuild went from 3.5s to 1.6s load time with every Core Web Vital green and bounce rate dropping immediately. A multilingual platform with NestJS backend across four languages had SSR, API, and indexing issues fixed, and organic traffic grew within six weeks of launch. React Next.js Node.js / NestJS TypeScript Tailwind React Native PostgreSQL / Supabase / MongoDB REST APIs and auth SSR, SSG technical SEO Core Web Vitals Payment and CMS integrations All handled in-house. If your current site is slow, or your next one needs to not be, that's exactly what I do.

  • React
  • React Native
  • JavaScript
  • Next.js
  • TypeScript
  • Tailwind CSS
  • Redux
  • Firebase
  • Node.js
  • REST API
  • MongoDB
  • HTML5
  • CSS 3
  • Git
  • GraphQL
  • Supabase
  • Swift
  • Android
Arslan R.

Lahore, Pakistan

$20/hr
5.0
133 jobs

𝐀𝐈-𝐍𝐚𝐭𝐢𝐯𝐞 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 𝐰𝐢𝐭𝐡 𝟏𝟓+ 𝐲𝐞𝐚𝐫𝐬 𝐨𝐟 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐀𝐈-𝐩𝐨𝐰𝐞𝐫𝐞𝐝 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, 𝐚𝐧𝐝 𝐜𝐥𝐨𝐮𝐝-𝐛𝐚𝐬𝐞𝐝 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐟𝐨𝐫 𝐬𝐭𝐚𝐫𝐭𝐮𝐩𝐬 𝐚𝐧𝐝 𝐞𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐜𝐥𝐢𝐞𝐧𝐭𝐬. Specialized in full-stack development using 𝐑𝐞𝐚𝐜𝐭.𝐣𝐬, 𝐍𝐨𝐝𝐞.𝐣𝐬, 𝐏𝐲𝐭𝐡𝐨𝐧, 𝐉𝐚𝐯𝐚𝐒𝐜𝐫𝐢𝐩𝐭, 𝐚𝐧𝐝 𝐓𝐲𝐩𝐞𝐒𝐜𝐫𝐢𝐩𝐭, 𝐰𝐢𝐭𝐡 𝐬𝐭𝐫𝐨𝐧𝐠 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬, 𝐀𝐠𝐞𝐧𝐭𝐢𝐜 𝐀𝐈 𝐰𝐨𝐫𝐤𝐟𝐥𝐨𝐰𝐬, 𝐑𝐀𝐆-𝐛𝐚𝐬𝐞𝐝 𝐬𝐲𝐬𝐭𝐞𝐦𝐬, 𝐀𝐈 𝐚𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧, 𝐚𝐧𝐝 𝐦𝐨𝐝𝐞𝐫𝐧 𝐀𝐈 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 Over the years, I have built modern web applications, backend systems, REST APIs, intelligent workflows, and scalable cloud infrastructure using AWS services, including EC2, Lambda, S3, API Gateway, and serverless architectures. I have worked across industries,𝐢𝐧𝐜𝐥𝐮𝐝𝐢𝐧𝐠 𝐀𝐈, 𝐒𝐚𝐚𝐒, 𝐅𝐢𝐧𝐓𝐞𝐜𝐡, 𝐄-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞, 𝐇𝐞𝐚𝐥𝐭𝐡𝐜𝐚𝐫𝐞, 𝐄𝐝𝐓𝐞𝐜𝐡, 𝐋𝐨𝐠𝐢𝐬𝐭𝐢𝐜𝐬, 𝐚𝐧𝐝 𝐞𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, helping businesses build scalable, reliable, and future-ready digital products. 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: React.js, Next.js, JavaScript, TypeScript, HTML5, CSS3 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Node.js, Express.js, Python, REST APIs, Authentication, API Integrations, Microservices 𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧:AI Agents, Agentic AI, RAG (Retrieval-Augmented Generation), AI Automation, OpenAI GPT, Claude AI, Gemini AI, Cursor AI, LLM Integrations, AI Chatbots, Workflow Automation 𝐂𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬:AWS EC2, AWS Lambda, AWS S3, API Gateway, Serverless Architecture, Docker, CI/CD Pipelines, GitHub Actions 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭:MongoDB, PostgreSQL, MySQL 𝐓𝐨𝐨𝐥𝐬 & 𝐂𝐨𝐥𝐥𝐚𝐛𝐨𝐫𝐚𝐭𝐢𝐨𝐧:GitHub, GitLab, Jira, ClickUp, Trello, Slack, Notion, Agile, Scrum 𝐈𝐟 𝐲𝐨𝐮’𝐫𝐞 𝐥𝐨𝐨𝐤𝐢𝐧𝐠 𝐟𝐨𝐫 𝐚𝐧 𝐀𝐈-𝐍𝐚𝐭𝐢𝐯𝐞 𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫 𝐰𝐡𝐨 𝐜𝐚𝐧 𝐜𝐨𝐦𝐛𝐢𝐧𝐞 𝐦𝐨𝐝𝐞𝐫𝐧 𝐟𝐮𝐥𝐥-𝐬𝐭𝐚𝐜𝐤 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐰𝐢𝐭𝐡 𝐢𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐀𝐈 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐭𝐨 𝐛𝐮𝐢𝐥𝐝 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐚𝐧𝐝 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧-𝐫𝐞𝐚𝐝𝐲 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬, 𝐋𝐞𝐭’𝐬 𝐜𝐨𝐧𝐧𝐞𝐜𝐭!!!

  • React Native
  • Full-Stack Development
  • API Integration
  • Python
  • DevOps
  • AI Chatbot
  • Machine Learning
  • FastAPI
  • Automation
  • Flask
  • Solution Architecture
  • Cloud Engineering Consultation
  • Node.js
  • DevOps Engineering
  • SaaS
  • Mobile App
  • MEAN Stack
  • Generative AI
  • Front-End Development
  • Generative AI Software
Oles T.

Lviv, Ukraine

$45/hr
5.0
20 jobs

Expert React Js Developer | Next.Js Developer 📈 5000+ hours of work only on Upwork! ⭐5-Star ratings across all projects 💼 9+ years of experience 🚀 30+ completed projects and 0 negative feedback ⚡ Job success score 100% 💎 Top Rated Plus Freelancer (Top 2% on Upwork) 🙋 I’ve worked as a FrontEnd React Engineer, Frontend Lead, and Senior Software Engineer for prominent companies like ExpoPlatform, DeepChecks, Haystack, Vuukle, and Found.ee. I am a (Top 2% on Upwork) with 9+ years of experience building cutting-edge software solutions for my clients. I focus on creating scalable, robust, and efficient applications using various modern technologies and frameworks. I have experience working with various web projects, including SaaS, web apps, and website development. 🏆 𝗪𝗛𝗬 𝗖𝗛𝗢𝗢𝗦𝗘 𝗠𝗘? 🔹 I’ve worked with clients across various industries, from e-commerce to healthcare, delivering websites that not only look great but also drive conversions and growth. 🔹 Over 9 years of hands-on experience in web development and exceptional feedback from satisfied clients worldwide. 🔹 Experience with Enterprise Clients like ExpoPlatform, DeepChecks, Haystack, Vuukle, Found.ee, and more. 🔹 5000+ working hours on Upwork with proven results. 🔹 Flexible Availability: 50+ hours/week, across time zones. 🔹 Certified JavaScript Developer. 🔹 Certified React Developer. 🔹 Certified React Native Developer. 🔹 Available almost 24/7 to meet your needs and bring your ideas to life. 🔹 Long-Term Contract Focus on Upwork. I'm available for a call to discuss your project needs and ensure we align on your goals. Contact me today to start our journey toward a successful partnership and effective development 🔥 𝗖𝗢𝗥𝗘 𝗦𝗞𝗜𝗟𝗟𝗦 & 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 ✅ Core skills: JavaScript (ES6+), HTML, HTML5, and CSS3. ✅ Front-end frameworks/libraries: Java, JavaScript, React.js, React js, Next.js, NextJs, Next js. Familiar with ReactJS, NextJS, React Query, react-hooks, and React Router, leveraging TypeScript for enhanced type safety. ✅ Experience with CSS preprocessors (Sass, LESS), styled-components, and frameworks like Tailwind CSS, Bootstrap, Ant Design, Material-UI, and Radix UI. ✅ Responsive Web design(RWD) and cross-browser compatibility. ✅ Version control tools: Git, GitHub, GitLab, Bitbucket. ✅ Webpack, Gulp, NPM, Yarn. ✅ State management libraries: Redux, Redux-Saga, MobX, or React Context. ✅ RESTful services and APIs, 3rd part APIs integration for fetching data. ✅ Performance optimization and UX/UI best practices. ✅ Jest, React Testing Library, Playwright, or Cypress. ✅ Storybook. ✅ Firebase (Realtime / Database / Cloud / Hosting). I have limited experience with Node.js, WordPress, Flutter, Java, Vue, Shopify, Python, and Angular, but I am always open to learning new technologies when needed. I have worked on full-stack projects where the backend was built using Firebase, handling authentication, database management, and cloud functions. Additionally, I have basic experience in design, allowing me to collaborate effectively with designers and contribute to UI/UX improvements. 🌟 𝗪𝗛𝗔𝗧 𝗗𝗢 𝗜 𝗣𝗥𝗢𝗩𝗜𝗗𝗘? 📗 Clear Communication: I prioritize effective communication and keep you updated every step of the way. 📗 Problem Solving: I’m detail-oriented and always deliver clean, optimized code to ensure your site runs smoothly. 📗 On-Time Delivery: Meeting deadlines is important to me, and I pride myself on delivering projects on schedule, every time. 📗 Custom Web Applications: CRM systems, project management tools, healthcare platforms, and data-driven dashboards. 📗 SEO & Performance Optimization: I focus on optimizing your website for fast loading speeds, SEO best practices, and mobile compatibility. 📗 Analysis of your requirements and providing tasks' estimation 📗 Writing clear, well-structured code in a timely manner 📗 Build stunning UIs with ReactJS or NextJS. Specialize in SPAs, PWA (Progressive Web Apps), and responsive designs tailored for any device. 📗 I develop tailored solutions for unique business needs, whether it’s building e-commerce platforms, integrating booking systems, or adding custom forms. 💬 𝗟𝗘𝗧’𝗦 𝗖𝗢𝗡𝗡𝗘𝗖𝗧! Feel free to reach out if you're ready to take your project to the next level. I’m excited to collaborate and build something exceptional together! 📞 Available for a call to discuss your project goals and create a clear roadmap. Thanks, Oles Telikhovskyi

  • React
  • Responsive Design
  • React Native
  • JavaScript
  • HTML
  • CSS
  • Web Development
  • HTML5
  • CSS 3
  • Next.js
  • TypeScript
  • Redux
  • Material UI
  • Firebase
  • Front-End Development
  • SaaS Development
  • Tailwind UI
  • Tailwind CSS
  • Senior Adult
  • App Development
Mohan R.

Jaipur, India

$9/hr
5.0
47 jobs

Hi, I’m Mohan, a Full Stack Developer with 10+ years of experience building scalable web platforms, mobile apps, SaaS products, AI powered systems, and eCommerce solutions. I help startups, agencies, and businesses turn ideas into high performance digital products with clean UI, strong backend architecture, and scalable deployment. What I Can Build ✅ Web Applications React.js, Next.js, Vue.js, Angular.js, Node.js, Express.js, Django, Laravel ✅ Mobile Applications React Native, Flutter, Swift, Kotlin for Android & iOS apps ✅ eCommerce Development Shopify, WooCommerce, WordPress, Magento, Wix, Framer, custom stores ✅ UI/UX Design Figma, Adobe XD, wireframes, prototypes, responsive UI systems ✅ Backend & APIs REST APIs, GraphQL, Firebase, Supabase, MongoDB, PostgreSQL, MySQL ✅ AI & Automation AI Agents, OpenAI integrations, LLM apps, chatbot systems, workflow automation ✅ Cloud & DevOps AWS, Docker, CI/CD, Vercel, DigitalOcean, GitHub, deployment optimization Industries I’ve Worked With • ECommerce • Healthcare & Telemedicine • Food Delivery • Education & LMS • Travel & Booking Platforms • Real Estate • FinTech • SaaS Platforms Why Clients Work With Me ✅ End to end development support ✅ Fast communication and regular updates ✅ Clean, scalable, maintainable code ✅ Mobile responsive and SEO friendly development ✅ Long term support and maintenance ✅ Focus on performance, UX, and business growth I can help with: • SaaS platforms • Booking systems • Marketplace apps • AI powered applications • Shopify stores • Mobile apps • Admin dashboards • CRM systems • API integrations • MVP development Tech Stack: Frontend: React.js, Next.js, Vue.js, Angular, HTML5, CSS3, Tailwind CSS, Bootstrap Backend: Node.js, Express.js, Django, Laravel, FastAPI Mobile: React Native, Flutter, Swift, Kotlin Database: MongoDB, PostgreSQL, MySQL, Firebase Tools: Git, Docker, Figma, Postman, Jira, CI/CD Let’s build something valuable together. Send me a message and let’s discuss your project.

  • React
  • React Native
  • Hybrid App Development
  • Mobile App Development
  • Node.js
  • Laravel
  • PHP
  • MySQL
  • Web Design
  • Web Application
  • WordPress
  • Mobile App
  • Flutter
  • AI Builder
  • Swift
  • Kotlin

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Resources to help you hire

Cost to hire a React.js Developer

Cost to hire a React.js Developer

Explore typical React.js Developer rates and what businesses pay to hire top talent.

React.js Developer job description template

React.js Developer job description template

Get tips to write a job post that attracts qualified React.js Developers.

React.js Developer interview questions

React.js Developer interview questions

Top interview questions to help you hire the right React.js Developers, faster.

React.js developer hiring guide

React.js has become the standard for building dynamic, high-performance user interfaces. Companies hire React.js developers to create scalable single-page applications, enhance user experience through reactive components, and modernize legacy front-end architectures. By leveraging component-based structures, these professionals ensure your application remains flexible and easier to test as requirements evolve.

What does a React.js developer do?

React.js developers build scalable, interactive web applications using React, a JavaScript library for creating user interfaces. They focus on component-based architecture, state management, and API integration to deliver seamless user experiences. Beyond writing code, these developers collaborate with designers and back-end teams to ensure application performance, accessibility, and responsiveness across devices.

Typical activities for React.js developers include:

  • Build user interfaces. Develop interactive web app components using React.js

  • Create reusable components. Design modular UI elements that can be reused across the application

  • Manage application state. Handle data flow and state using tools like hooks, Redux, or Context API 

  • Integrate APIs. Connect the front end to back-end services and external data sources

  • Optimize performance. Improve load times and responsiveness through efficient rendering and code splitting

  • Ensure responsiveness. Make applications work seamlessly across devices and screen sizes

  • Debug and maintain code. Fix issues and update features to keep applications running smoothly

  • Collaborate with teams. Act as a bridge between visual designers, back-end developers, and product managers to deliver aesthetics, features, and functionality

Whether your needs are for a startup launching a new product or an enterprise optimizing a complex dashboard, a skilled React.js developer can translate design concepts into efficient, maintainable code that drives business growth. 

How to hire a React.js developer on Upwork

Finding the right React.js developer requires a clear understanding of your project needs and a systematic evaluation process. The steps below outline a practical hiring workflow, from defining technical requirements to establishing working terms.

Step 1: Craft a targeted job post

Your job post serves as the first point of contact with potential candidates and directly influences applicant quality. A well-defined job post attracts developers who possess the exact technical skills your project requires.

  • Review our React.js developer job description template for starting ideas.

  • Outline your project goals, required technical stack (React, Next.js, TypeScript, etc.), and expected deliverables.

  • List must-have technical skills such as JavaScript (ES6+), JSX, Redux or Context API, React hooks, and familiarity with testing frameworks.

  • Include a realistic project timeline and budget.

Get started fast with Job Post Generator, powered by Uma™, Upwork's Mindful AI. Begin with a few sentences describing your needs and Uma will create a customizable draft for your review in minutes.

Step 2: Filter and evaluate candidates

A structured approach to candidate assessment helps you identify developers whose demonstrated experience aligns with your project's technical demands.

  • Use Upwork's filters (budget, time zone, expertise level, Top Rated status) to narrow your candidate pool efficiently.

  • Review portfolios for React-based projects and look for live links, GitHub repositories, or deployed applications.

  • Check client testimonials for feedback on technical ability, communication skills, and collaboration style.

  • Use Uma to conduct instant video interviews and review side-by-side candidate comparisons with AI-powered insights.

Step 3: Interview your top choices

The interview stage validates technical expertise and reveals how candidates approach real-world development challenges.

  • Schedule interviews within Upwork Messages and receive AI-generated transcripts and summaries to compare candidates objectively.

  • Conduct interviews using focused React.js questions to assess problem-solving approach and technical depth. Drawing from front-end developer interview strategies can help evaluate comprehensive UI development skills.

  • Consider incorporating JavaScript-specific interview questions to evaluate fundamental programming skills.

  • Inquire about component structure, testing strategies, and use of tools like Redux, Context, Recoil, or Zustand. 

  • Discuss performance optimization strategies, including memoization, lazy loading, and code splitting.

  • Consider a small paid technical assessment to directly evaluate coding style.

Step 4: Agree on scope and begin work

Formalizing project parameters in a contract before development begins protects both parties and creates a foundation for successful collaboration.

  • Finalize contract terms with clear payment structures (fixed-price for well-defined scope or hourly for ongoing development).

  • Establish clear, measurable milestones (e.g., wireframe approval, core component delivery, integration testing, final UAT) to track progress.

  • Define specific deliverables, deadlines, and communication expectations in the contract.

  • Utilize Upwork's built-in messaging, contract workroom, identity verification, payment protection, and hourly tracking for security and transparency.

Upwork is not affiliated with and does not sponsor or endorse any of the tools or services discussed in this article. These tools and services are provided only as potential options, and each reader and company should take the time needed to adequately analyze and determine the tools or services that would best fit their specific needs and situation.

The rates and information provided in this article are based on current data and industry sources available at the time of publication. Freelance rates can vary depending on factors such as experience, location, project scope, and market conditions. Readers are encouraged to conduct their own research to confirm current rates and trends, as this information may change over time.

How much does hiring a React.js developer cost?

React.js developers on Upwork generally charge $20-$38 per hour, based on experience level, location, and project complexity. Senior specialists may command rates of $51-$150 per hour. 

Below are typical project costs for React.js jobs commonly found on Upwork:

Basic component development

$500-$2,000 /project

Entry-level to mid-level
  • Single feature component
  • UI element implementation
  • Basic bug fixes

Standard web application

$2,000-$8,000 /project

Mid-level to senior-level
  • Multipage responsive web app
  • API integration setup
  • State management implementation

Complex enterprise solution

$8,000+ /project

Senior-level or specialist
  • Large-scale application architecture
  • Performance optimization
  • Advanced security implementation

Ongoing maintenance and updates

$2,000-$6,000 /month

Mid-level to senior-level
  • Continuous feature development
  • Performance monitoring and tuning
  • Regular bug fixes and updates

Strategic consultation and architecture

$5,000-$15,000+ /project

Expert-level
  • Technical roadmap creation
  • Architecture design planning
  • Code review standards setup

FAQs about React.js developers

Frequently asked questions

Is hiring a React.js developer worth it?

Hiring a professional React.js developer is worth it when you need robust, scalable web applications that perform well under load. Experienced developers bring deep knowledge of component architecture, security best practices, and performance optimization that helps ensure your application is maintainable and future-proof.

What technical skills should a React.js developer have?

React.js developers should possess strong fundamentals in JavaScript (ES6+), HTML5, and CSS3, along with deep expertise in React core concepts like hooks, virtual DOM, and component life cycle. They should be proficient with state management libraries, routing tools, and version control systems like Git.

What types of projects can React.js developers handle?

React.js developers excel at building interactive single-page applications (SPAs), complex data dashboards, e-commerce platforms, and social media interfaces. They’re also capable of developing cross-platform mobile applications using React Native. Their skills are particularly suited for projects requiring real-time data updates and highly responsive user experiences.

Can a React.js developer handle full-stack development?

Yes, many React.js developers possess full-stack capabilities, often utilizing the MERN stack (MongoDB, Express, React, Node.js). When evaluating these broader skills, consider using full-stack interview questions alongside React-specific assessments. If your project requires full-stack work, explicitly look for experience with back-end technologies in their profile.