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$30/hr
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$5K+ earned
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Full-stack and React Native developer who builds web and cross-platform mobile apps, React, Next.js, Node.js, MongoDB · 5-star rated.
Need one developer who can build your web app and mobile app without switching teams or losing context? I deliver complete, production-ready products across web and mobile — using React, Next.js, Node.js, MongoDB, and React Native for iOS & Android.
Whether it's a SaaS web platform, a cross-platform mobile app, or both running off the same backend — I've got the full stack covered.
What I build:
✅ Full-Stack Web Apps — React / Next.js + Node.js / Express backend
✅ Cross-Platform Mobile Apps — React Native (iOS & Android)
✅ REST API & GraphQL API — shared backend for web + mobile
✅ MongoDB & PostgreSQL Database Design
✅ Authentication — JWT, OAuth 2.0, NextAuth.js, Firebase Auth
✅ SaaS Dashboards, Admin Panels & Client Portals
✅ Push Notifications, Offline Support & App Store Deployment
✅ Responsive UI — Tailwind CSS, Material UI, Shadcn
How I work:
Clear communication, realistic timelines, and clean code your team can build on. You'll always know where the project stands — no surprises at delivery.
Tech stack:
JavaScript · TypeScript · React.js · Next.js · React Native · Node.js · Express.js · MongoDB · PostgreSQL · REST API · GraphQL · Firebase · Tailwind CSS · Expo · Git · Vercel · AWS
Building a web platform, mobile app, or both? Send me your project brief and I'll respond promptly.
$15/hr
100%
Job Success
$100+ earned
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Looking for a developer who can turn your idea into a fast, scalable, and stunning product MVP?
My expertise spans both front-end and back-end development, enabling me to build fully integrated, scalable and high-performance web applications from the ground up.
✔️ 𝐅𝐫𝐨𝐧𝐭-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
- React.js with Hooks, Context API & React Router
- Redux / Redux Toolkit for predictable state management
- TypeScript for type-safe, reliable development
- Tailwind, Material UI & Styled Components for responsive UI
✔️ 𝐁𝐚𝐜𝐤-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
- Node.js & Express for secure, scalable REST APIs
- Structured, optimized endpoints for smooth data exchange
- Authentication: JWT, OAuth, Passport.js, Firebase Auth
- Real-time features with Web Sockets & Socket.IO
✔️𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
- 𝖤𝗑𝗉𝖾𝗋𝗂𝖾𝗇𝖼𝖾 𝗈𝖿 𝖻𝗎𝗂𝗅𝖽𝗂𝗇𝗀 𝗁𝗂𝗀𝗁-𝗉𝖾𝗋𝖿𝗈𝗋𝗆𝖺𝗇𝖼𝖾, 𝖼𝗋𝗈𝗌𝗌-𝗉𝗅𝖺𝗍𝖿𝗈𝗋𝗆 𝗆𝗈𝖻𝗂𝗅𝖾 𝖺𝗉𝗉𝗅𝗂𝖼𝖺𝗍𝗂𝗈𝗇𝗌 𝗎𝗌𝗂𝗇𝗀 𝖥𝗅𝗎𝗍𝗍𝖾𝗋, 𝖱𝖾𝖺𝖼𝗍
𝖭𝖺𝗍𝗂𝗏𝖾, 𝖺𝗇𝖽 𝖷𝖺𝗆𝖺𝗋𝗂𝗇
- 𝖬𝗈𝖻𝗂𝗅𝖾 𝖺𝗋𝖼𝗁𝗂𝗍𝖾𝖼𝗍𝗎𝗋𝖾, 𝗌𝗍𝖺𝗍𝖾 𝗆𝖺𝗇𝖺𝗀𝖾𝗆𝖾𝗇𝗍, 𝖠𝖯𝖨 𝗂𝗇𝗍𝖾𝗀𝗋𝖺𝗍𝗂𝗈𝗇, 𝖺𝗇𝖽 𝗉𝖾𝗋𝖿𝗈𝗋𝗆𝖺𝗇𝖼𝖾 𝗈𝗉𝗍𝗂𝗆𝗂𝗓𝖺𝗍𝗂𝗈𝗇 𝗍𝗈 𝖾𝗇𝗌𝗎𝗋𝖾
𝗌𝖼𝖺𝗅𝖺𝖻𝗅𝖾, 𝗌𝖾𝖼𝗎𝗋𝖾, 𝖺𝗇𝖽 𝗉𝗋𝗈𝖽𝗎𝖼𝗍𝗂𝗈𝗇-𝗋𝖾𝖺𝖽𝗒 𝗆𝗈𝖻𝗂𝗅𝖾 𝖺𝗉𝗉𝗌.
✔️ 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭
- MongoDB + Mongoose for flexible NoSQL design
- PostgreSQL + Sequelize for relational applications
- Schema design, referential-integrity management, indexing & performance optimization &
security enhancement
✔️ 𝐃𝐞𝐜𝐞𝐧𝐭𝐫𝐚𝐥𝐢𝐳𝐞𝐝 𝐁𝐥𝐨𝐜𝐤𝐜𝐡𝐚𝐢𝐧 𝐏𝐚𝐲𝐦𝐞𝐧𝐭 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬
- 𝖣𝖾𝗏𝖾𝗅𝗈𝗉𝖾𝖽 𝗌𝖾𝖼𝗎𝗋𝖾, 𝗈𝗇-𝖼𝗁𝖺𝗂𝗇 𝖼𝗋𝗒𝗉𝗍𝗈 𝗉𝖺𝗒𝗆𝖾𝗇𝗍 𝗀𝖺𝗍𝖾𝗐𝖺𝗒𝗌 𝗎𝗌𝗂𝗇𝗀 𝖲𝗈𝗅𝗂𝖽𝗂𝗍𝗒, 𝖶𝖾𝖻𝟥.𝗃𝗌, 𝖺𝗇𝖽 𝖤𝗍𝗁𝖾𝗋𝗌.𝗃𝗌.
- 𝖨𝗆𝗉𝗅𝖾𝗆𝖾𝗇𝗍𝖾𝖽 𝗌𝗆𝖺𝗋𝗍 𝖼𝗈𝗇𝗍𝗋𝖺𝖼𝗍 𝖺𝗎𝗍𝗈𝗆𝖺𝗍𝗂𝗈𝗇 𝖿𝗈𝗋 𝗋𝖾𝖺𝗅-𝗍𝗂𝗆𝖾, 𝗍𝗋𝖺𝗇𝗌𝗉𝖺𝗋𝖾𝗇𝗍 𝖻𝗅𝗈𝖼𝗄𝖼𝗁𝖺𝗂𝗇 𝗍𝗋𝖺𝗇𝗌𝖺𝖼𝗍𝗂𝗈𝗇𝗌.
✔️ 𝗔𝗴𝗶𝗹𝗲 𝗦𝗽𝗿𝗶𝗻𝘁 𝗣𝗹𝗮𝗻𝗻𝗶𝗻𝗴 & 𝗧𝗿𝗮𝗰𝗸𝗶𝗻𝗴 𝘄𝗶𝘁𝗵 𝗔𝘇𝘂𝗿𝗲 𝗗𝗲𝘃𝗢𝗽𝘀
- 𝖲𝗍𝗋𝗎𝖼𝗍𝗎𝗋𝖾𝖽 𝖡𝖺𝖼𝗄𝗅𝗈𝗀 𝖬𝖺𝗇𝖺𝗀𝖾𝗆𝖾𝗇𝗍: 𝖠𝗅𝗂𝗀𝗇 𝖮𝖪𝖱𝗌 𝗍𝗈 𝖤𝗉𝗂𝖼𝗌 → 𝖥𝖾𝖺𝗍𝗎𝗋𝖾𝗌 → 𝖯𝖡𝖨𝗌 → 𝖳𝖺𝗌𝗄𝗌, 𝖾𝗇𝗌𝗎𝗋𝗂𝗇𝗀 𝖼𝗅𝖾𝖺𝗋
𝗉𝗋𝗂𝗈𝗋𝗂𝗍𝗂𝗓𝖺𝗍𝗂𝗈𝗇 𝖺𝗇𝖽 𝗍𝗋𝖺𝖼𝖾𝖺𝖻𝗂𝗅𝗂𝗍𝗒 𝖺𝖼𝗋𝗈𝗌𝗌 𝖺𝗅𝗅 𝗅𝖾𝗏𝖾𝗅𝗌.
- 𝖲𝗉𝗋𝗂𝗇𝗍 𝖯𝗅𝖺𝗇𝗇𝗂𝗇𝗀 & 𝖤𝗑𝖾𝖼𝗎𝗍𝗂𝗈𝗇: 𝖤𝖿𝖿𝗂𝖼𝗂𝖾𝗇𝗍𝗅𝗒 𝗉𝗅𝖺𝗇 𝗌𝗉𝗋𝗂𝗇𝗍𝗌 𝗂𝗇 𝖠𝖣𝖮, 𝖺𝗌𝗌𝗂𝗀𝗇 𝗍𝖺𝗌𝗄𝗌, 𝖺𝗇𝖽 𝗆𝖺𝗂𝗇𝗍𝖺𝗂𝗇 𝗍𝖾𝖺𝗆
𝖺𝖼𝖼𝗈𝗎𝗇𝗍𝖺𝖻𝗂𝗅𝗂𝗍𝗒 𝗐𝗁𝗂𝗅𝖾 𝖿𝗈𝗌𝗍𝖾𝗋𝗂𝗇𝗀 𝖼𝗈𝗅𝗅𝖺𝖻𝗈𝗋𝖺𝗍𝗂𝗈𝗇.
- 𝖱𝖾𝖺𝗅-𝖳𝗂𝗆𝖾 𝖯𝗋𝗈𝗀𝗋𝖾𝗌𝗌 𝖳𝗋𝖺𝖼𝗄𝗂𝗇𝗀: 𝖫𝖾𝗏𝖾𝗋𝖺𝗀𝖾 𝖠𝖣𝖮 𝖽𝖺𝗌𝗁𝖻𝗈𝖺𝗋𝖽𝗌 𝗍𝗈 𝗆𝗈𝗇𝗂𝗍𝗈𝗋 𝖢𝖥𝖣, 𝖻𝗎𝗋𝗇-𝖽𝗈𝗐𝗇 𝖼𝗁𝖺𝗋𝗍𝗌,
𝗏𝖾𝗅𝗈𝖼𝗂𝗍𝗒, 𝗅𝖾𝖺𝖽 𝗍𝗂𝗆𝖾, 𝖺𝗇𝖽 𝖼𝗒𝖼𝗅𝖾 𝗍𝗂𝗆𝖾 𝖿𝗈𝗋 𝖺𝖼𝗍𝗂𝗈𝗇𝖺𝖻𝗅𝖾 𝗂𝗇𝗌𝗂𝗀𝗁𝗍𝗌.
✔️ 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐃𝐞𝐩𝐥𝐨𝐲𝐦𝐞𝐧𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭
- Docker-based containerization
- CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins, Azure DevOps)
- Deployments on AWS, Digital-Ocean, Heroku with Nginx optimization
✔️𝐐𝐮𝐚𝐥𝐢𝐭𝐲 𝐀𝐬𝐬𝐮𝐫𝐚𝐧𝐜𝐞, 𝐓𝐞𝐬𝐭𝐢𝐧𝐠 & 𝐂𝐨𝐧𝐭𝐫𝐨𝐥
- Jest, Mocha & Chai for unit/integration tests
- Cypress for robust end-to-end testing
🧠 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐁𝐮𝐢𝐥𝐝 𝐟𝐨𝐫 𝐘𝐨𝐮
* 🚀 SaaS Platforms & MVPs ready for launch
* 💼 Business dashboards, portals, and management systems
* 🛍️ E-commerce & subscription-based apps
* 📱 Cross-platform React Native mobile apps
* ☁️ Cloud-integrated systems with AWS / Firebase
𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰:
1. Quick call to understand what we’re building
2. Set up structure: frontend, backend, DB, auth
3. Build core features with real data + roles
4. Test, clean up, deploy (AWS, custom server whatever works best)
𝐖𝐡𝐚𝐭 I 𝐜𝐚𝐧 𝐝𝐨?
✔️ Build end-to-end web applications from scratch using the MERN stack or other modern technologies.
✔️ Develop secure REST/GraphQL APIs, handle user authentication and implement role-based access control.
✔️ Create highly performant scalable applications by optimizing front-end and back-end architectures.
✔️ Implement real-time features like live chat, notifications, and dashboards using Socket.IO and WebSockets.
✔️ Integrate third-party APIs and services such as Stripe, PayPal, Twilio and more.
𝐖𝐡𝐲 𝐂𝐡𝐨𝐨𝐬𝐞 𝐌𝐞:
✔️ years of experience delivering high-quality, maintainable and scalable code.
✔️ Focus on clean architecture, performance optimization, and writing robust, testable code.
✔️ Expertise in building full-stack applications, handling everything from database design to API integrations and front-end development.
Let’s take your idea and turn it into a high-performing application that works today, tomorrow, and beyond. Drop me a message right now and hire me as a full-stack developer for your project!
$50/hr
100%
Job Success
$100K+ earned
Available now
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I’m a backend developer with 7+ years of experience building scalable, high-performance applications using Node.js, including frameworks like Express and NestJS, along with modern backend technologies.
I specialize in writing clean, maintainable, and optimized code, solving complex challenges, and designing robust system architectures tailored for startups and growing businesses. I'm passionate about building microservices, integrating cloud-native solutions, and continuously learning better ways to ship reliable backend systems.
I've worked with startups, SaaS platforms, and e-commerce teams to launch reliable REST APIs, optimize backend performance, and scale infrastructure cost-effectively across modern cloud environments.
✅ Core Skills & Technologies:
1. Languages: TypeScript, JavaScript, Go (Golang), Python, Java
2. Node.js Frameworks: Express.js, NestJS
3. Databases: MongoDB (Mongoose), PostgreSQL, MySQL, Prisma, TypeORM
4. Caching & Messaging: Redis, Message Brokers (e.g., RabbitMQ, Kafka)
5. Architecture: Microservices, REST APIs, System Design, SOLID principles, OOP
6. Cloud & DevOps: AWS (EC2, S3, Lambda), GCP, Docker, Deployment pipelines
7. Testing: Unit & Integration Testing
Whether you're building a new SaaS product, integrating a payment system, or scaling your backend, I bring a strong foundation in backend engineering and a drive to deliver clean, efficient, and scalable solutions.
Ready to help you bring your product to life — let’s build something great together. 🚀
Mohamed A.
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.
$30/hr
100%
Job Success
$200K+ earned
Available now
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You're probably wondering, among thousands of Top Rated Plus freelancers, what makes this one any different.
And honestly? Skill-wise, not much. Every Top Rated Plus developer on this platform is in the top 3% of Upwork. We've all shipped production-grade products, debugged at 2am, and argued about the right way to structure a database schema. That's just the baseline.
Where I'm different is how I show up.
I don't take a brief and disappear into a code editor. I ask questions. I challenge assumptions. I push back when something doesn't make business sense, and I'll tell you when a simpler solution beats the one you came in with. I've built and run my own SaaS products, and I come from a business background, so I see every project through two lenses at once: what you're building technically, and whether it's actually going to work as a business.
Most developers will build exactly what you ask for. I'll build what you actually need.
That means you get a co-builder, not a contractor, someone who's genuinely invested in the outcome, brings a bit of humor to the process, and won't let you spend six figures heading in the wrong direction.
If that's the kind of working relationship you've been looking for, keep reading.
My core stack: React / Next.js, Node.js, TypeScript, Supabase / PostgreSQL, MySql MongoDB, Mongoose, Prisma, Rest API, GraphQL
AI Integrations: OpenAI, Claude, Open Router, Grok, Gemini, Perplexity, Eleven Labs, Vapi, and AI Agents
Automation: n8n, make, and zapier.
🌟 Here's what founders I've built for are actually saying:
● "Since the new platform launch, our online sales have skyrocketed by 300%!"
● "Customer sign-ups and engagement magnified after the rebuild!"
● "Seamless app and e-commerce integration, our revenue grew by over $2M!"
● "Our redesigned product won the Web Excellence Award for best UI/UX!"
10+ years of full-stack development. $10M+ in client revenue powered by platforms I've shipped: SaaS products, web apps, e-commerce engines, real estate portals, and AI-powered platforms across B2B and B2C.
***
⚡ We're probably a great fit if you're thinking:
● "I have a huge market opportunity and need the best engineer to capture it"
● "My product vision has grown, but the codebase hasn't caught up"
● "I know the business side, I need a technical co-builder I can actually trust"
● "I'm not a developer and can't afford to waste months on the wrong hire"
● "My last dev burned me badly, I won't let that happen again"
● "I need a scalable, production-grade platform built to grow with me"
***
What you get when we work together:
★ Full ownership: Architecture, Frontend, Backend, APIs, Deployment, and Product Strategy, handled
★ A production-ready platform your users love and your investors respect
★ Technical debt and architectural mistakes caught before they become expensive
★ A turnkey, scalable codebase built to survive your next funding round
★ Clear communication, on-budget delivery, and no surprises mid-project
★ Core architecture you can reuse across future product lines, cutting long-term dev costs significantly
***
What my clients say:
✅ "Saimul does incredible work! Super passionate, consistently went above and beyond every single time."
✅ "Communication was always smooth, very proactive and easy to reach throughout the entire project."
✅ "Highly solution-oriented with deep skills across his field, a genuine problem solver."
✅ "Great listener who translates complex requirements into a product that actually works."
✅ "Excellent work, sharp attention to detail, and always willing to go the extra mile for the team."
***
I specialize in serious product builds, SaaS MVPs, B2B platforms, AI integrations, e-commerce systems, and complex full-stack applications. No template flips. No shortcuts.
I've shipped 150+ websites and web apps across a decade of development. As an engineer and technical architect, I have a 360° view of the full build lifecycle, from discovery and wireframing through production deployment and post-launch optimization.
My capacity is limited. I carry 80% repeat clients and 40% referrals, and I only take on projects I'm certain I can execute at the highest level.
What I look for in a new client:
● A clear product vision with room to collaborate
● Values clean architecture and long-term thinking over shortcuts
● Focused on real user outcomes, not just shipping pixels
● Knows the scale they're building toward
Not the right fit if:
✗ You need a $300 template site, that's not what I build
✗ You want to micromanage architecture decisions and sprint cycles
✗ Honest communication and mutual respect aren't priorities
***
Sound like a fit?
📋 Review my portfolio and live project examples on this profile
💬 Hit "Invite" or "Message" and send me a short note about your project, I respond within hours.
$20/hr
Available now
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I built the backend for a fintech app with 1M+ active users, using Nodejs, NestJS, MongoDB & Python.
I specialize in NodeJS, NestJS, Express.js, and Python backend development, building scalable REST APIs, microservices, and AI-integrated backends for SaaS platforms, startups, and enterprise products. I also build MCP (Model Context Protocol) servers for AI agent integrations.
What I deliver:
✅ REST APIs & GraphQL backends: Node.js, NestJS, Express.js, Python (FastAPI)
✅ MCP Server development for AI agents & LLM integrations
✅ Microservices & event-driven architecture
✅ Database design & optimization: PostgreSQL, MongoDB, Redis
✅ Auth systems: JWT, OAuth 2.0, Role-Based Access Control (RBAC)
✅ Cloud deployment: AWS (EC2, Lambda, S3), Docker, CI/CD pipelines
✅ Third-party integrations: Stripe, Twilio, SendGrid, OpenAI, Webhooks
✅ Performance-critical services with Golang when speed is critical
I've built backends for SaaS platforms, AI-powered applications, automation systems, and subscription-based products. I write clean, maintainable code, communicate proactively, and treat your project like my own.
Tech Stack: Node.js · NestJS · Express.js · Python · FastAPI · TypeScript · PostgreSQL · MongoDB · Redis · GraphQL · Docker · AWS · Golang · MCP
$15/hr
100%
Job Success
$3K+ earned
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✅ High-Quality Work
✅ Cost-Efficient Services
✅ Fluent English Verified
✅ FAST Deliver of Work
✅ Long term working relationship
I am a full-stack web developer with a track record of delivering large-scale high-performance products and have professional experience in various technologies of frontend and backend development.
Listed below are my experience and skills:
✅ Frontend: ReactJS/Redux, Bootstrap, JavaScript, TypeScript, jQuery, Ajax, HTML5, Material UI, TailwaindCSS.
✅ Backend: NodeJS, ExpressJS, NestJS ,RESTful API, GraphQL
✅ Database: MongoDB, PostgreSQL, MySQL.
Thanks a lot for visiting my profile, You are invited to watch my portfolios. Please see this at a glance. Enjoy your moments have a good time. 🙂
AbdulRahman S.
has worked
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$20/hr
100%
Job Success
$20K+ earned
Available now
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Full-Stack Engineer helping startups and businesses build scalable SaaS, AI-powered web and mobile applications using React, Next.js, Node.js, Python, FastAPI, TypeScript, React Native, Supabase, PostgreSQL, MongoDB, OpenAI, Claude, LangChain, and modern cloud technologies. From MVPs to production platforms, I build products that are fast, maintainable, and ready to scale.
I work with founders, startups, and growing businesses to turn ideas into reliable software. Whether you're validating an MVP, scaling an existing product, integrating AI, or modernizing your application, I focus on building solutions that are clean, scalable, and built for long-term success.
I also leverage modern AI-assisted development workflows using Claude, Cursor, ChatGPT, GitHub Copilot, and other AI tools to accelerate development, improve code quality, and reduce delivery time without compromising engineering standards.
Most products don't fail because of bad ideas. They fail because they're built without scalability, maintainability, or future growth in mind. My goal is to make sure your product is ready for both launch and what comes after.
MVP & Product Development
From an idea on a whiteboard to a production-ready application, I can own the entire development lifecycle.
• Product architecture and technical planning
• End-to-end MVP development
• SaaS platform development
• Feature development and product scaling
• API integrations and third-party services
• Deployment and production support
Full-Stack Development
Frontend
• React
• Next.js
• TypeScript
• JavaScript
• Tailwind CSS
Backend
• Node.js
• Express.js
• REST APIs
• GraphQL
Databases
• PostgreSQL
• MongoDB
• Supabase
• Firebase
Integrations
• Stripe
• Twilio
• SendGrid
• Authentication
• Payment systems
• Third-party APIs
AI Development & Integrations
AI is becoming part of every modern product, and I help businesses integrate it in ways that deliver real value.
• OpenAI API integration
• Claude integration
• LangChain applications
• AI chatbots and assistants
• RAG (Retrieval-Augmented Generation) systems
• Vector databases and semantic search
• AI agents and workflow automation
• AI-powered SaaS features
• Custom internal AI tools
AI-Assisted Engineering
I combine senior engineering practices with modern AI development tools to build software more efficiently.
• Claude
• Cursor
• ChatGPT
• GitHub Copilot
• Faster feature delivery
• AI-assisted debugging and testing
• Rapid prototyping
• Code refactoring
• Documentation generation
• Technical planning
Web3 & Blockchain Development
• Smart contract development with Solidity
• Hardhat and Foundry
• dApp development
• MetaMask and WalletConnect integrations
• Ethers.js and Web3.js
• Token transfers and crypto payments
• Blockchain API integrations (Alchemy, Infura)
• Gas optimization
Web & Mobile Applications
• Responsive web applications with React and Next.js
• Cross-platform mobile apps using React Native
• Performance optimization
• Accessibility improvements
• Clean, intuitive user experiences
Why Clients Choose Me
There are plenty of developers who can write code. What matters is building software that supports your business long after launch.
Here's what you can expect when working with me:
• Clean, maintainable code that scales with your business
• Strong communication and proactive updates
• Fast development without sacrificing quality
• Experience across SaaS, AI, Web, Mobile, and Web3 products
• Product-focused thinking, not just task completion
• Reliable architecture that minimizes technical debt
Core Skills
React • Next.js • Node.js • TypeScript • JavaScript • React Native • Tailwind CSS • PostgreSQL • MongoDB • Supabase • Firebase • REST API • GraphQL • OpenAI API • Claude • LangChain • AI Agents • RAG • Vector Databases • Semantic Search • Prompt Engineering • AI Automation • Cursor • GitHub Copilot • Solidity • Hardhat • Ethers.js • Web3.js • MetaMask • WalletConnect • Stripe • SaaS Development • MVP Development • Full-Stack Development • AI Integration • Mobile App Development • Blockchain Development
If you're building a new product, adding AI capabilities, scaling an existing platform, or need an experienced engineer to rescue a project that's falling behind, let's talk. I'll give you a clear assessment of the best technical approach and what it will take to get your product where it needs to be.
Associated with
OptimusFox
$20K+
earned
$90/hr
$300 earned
Available now
Start of list.
End of list.
I design and deliver AI-driven SaaS platforms, trading systems, and embedded solutions from architecture to deployment. My background combines low-latency algo-trading (Rust, HFT, OMS/EMS) with scalable cloud-native SaaS and embedded firmware, giving me the ability to build products that span cloud, web, and hardware.
I stay current with emerging AI trends to improve development efficiency while balancing speed and quality. I’m experienced in both traditional hands-on development and AI-assisted workflows using tools like Claude, Cursor, and GitHub Copilot.
I’m comfortable diving into complex or legacy codebases, including AI-generated code, to debug, refactor, and bring systems up to production standards.
I partner with founders and early-stage teams to rapidly validate and launch MVPs, using a pragmatic mix of custom development and no-code/low-code platforms (e.g., Webflow, Bubble, Zapier).
Highlights:
- AI & SaaS
Architected Trademind.pro, a SaaS trading journal (Next.js + Postgres + Supabase) and built LLM routing engines that cut inference cost 6× and latency 4× on AWS.
- High-Frequency Trading
Built autonomous Rust microservices for futures & equities, including an algorithm runtime under 1 ms and multi-account trade execution engine.
- Cloud & DevOps
Deployments on AWS, Azure, Docker Compose, GitHub Actions CI/CD, Cloudflare; microservice orchestration with secure APIs.
- SOC2& Compliance
Experience with data-sensitive systems, CI/CD reliability, and secure data handling.
- Embedded & Robotics
ESP32/FreeRTOS firmware with concurrent BLE, Wi-Fi, and SD logging; FPGA/Verilog systems; robotics M.S. track at Oregon State.
- Leadership
CTO & founder of Vcrypt Financial, leading 16 engineers across three squads (Web, Algo, Marketing); cross-functional management of sales, strategy, and engineering.
Tech Stack:
Python, TypeScript, .NET, Node.js, React/Next.js, Rust, Angular, C/C++, PostgreSQL/Prisma, Docker, AWS, Azure, gRPC/WebSockets, Supabase, Qt, FreeRTOS, FPGA/Verilog, OAuth2, Terraform.
I work best when I can own a vertical slice from cloud architecture and backend APIs to front-end UX or firmware at the edge and deliver systems that are fast, compliant, and production-ready.
$20/hr
$1K+ earned
Available now
Start of list.
End of list.
🚀 𝘏𝘦𝘭𝘱𝘪𝘯𝘨 𝘧𝘰𝘶𝘯𝘥𝘦𝘳𝘴 𝘵𝘶𝘳𝘯 𝘪𝘥𝘦𝘢𝘴 𝘪𝘯𝘵𝘰 𝘚𝘢𝘢𝘚, 𝘉𝘭𝘰𝘤𝘬𝘤𝘩𝘢𝘪𝘯, 𝘢𝘯𝘥 𝘈𝘐 𝘱𝘭𝘢𝘵𝘧𝘰𝘳𝘮𝘴.
I help startups and businesses build SaaS platforms, Blockchain/Web3 applications, and AI tools using modern technologies like React, Node.js, Solidity, and cloud services.
I have 5+ years of experience, I have built real platforms including NFT marketplaces, token launchpads, DeFi dashboards, blockchain systems, subscription-based SaaS products, and AI tools. I focus on writing clean and reliable code and building products that work smoothly for real users.
𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗕𝘂𝗶𝗹𝗱
• SaaS platforms with subscriptions and Stripe billing
• Blockchain and smart contracts (ERC20, ERC721, ERC1155)
• NFT marketplaces, token launchpads, and DeFi dashboards
• Web3 wallet integrations
• AI tools and automation systems
• Backend APIs and admin dashboards
𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸
React.js, Next.js, Node.js, Nest.js
MongoDB, PostgreSQL
Solidity, Web3.js, Ethers.js
AWS, Docker
I communicate clearly, deliver on time, and focus on building reliable products for your business.
💬 𝘓𝘦𝘵’𝘴 𝘥𝘪𝘴𝘤𝘶𝘴𝘴 𝘺𝘰𝘶𝘳 𝘱𝘳𝘰𝘫𝘦𝘤𝘵 𝘢𝘯𝘥 𝘣𝘶𝘪𝘭𝘥 𝘴𝘰𝘮𝘦𝘵𝘩𝘪𝘯𝘨 𝘨𝘳𝘦𝘢𝘵.
$50/hr
100%
Job Success
$200K+ earned
Available now
Start of list.
End of list.
I'm a Senior Full-Stack & AI Engineer with 15+ years of experience building scalable web, mobile, and AI-powered applications. I help startups and enterprises turn ideas into production-ready products using modern frontend frameworks, cloud infrastructure, and cutting-edge AI technologies.
My development lifecycle is hyper-optimized. I build intelligent applications—utilizing the MERN stack and Next.js—and deploy them seamlessly on modern infrastructure like Vercel. More importantly, my workflow is driven by advanced AI: I leverage Claude, Antigravity, Cursor, and custom-built IDE agents to write, refactor, and debug code at an unprecedented speed. Whether you need a sophisticated LLM integration (OpenAI, Anthropic, LangChain) or a high-performance web app delivered ahead of schedule, I bring enterprise-level project management and engineering to your team.
I have successfully delivered 50+ projects, including SaaS platforms, AI applications, mobile apps, enterprise dashboards, and high-scale APIs.
My expertise covers the entire product lifecycle — from architecture and development to deployment, scaling, and automation.
Core Expertise
Frontend Development
Modern, fast, and scalable user interfaces.
HTML5, CSS3, Tailwind
JavaScript (ESNext), TypeScript
React, Next.js, Redux
Angular, Angular Universal, Angular Material
Vue.js, Vuex
Progressive Web Apps (PWA)
Mobile App Development
Hybrid cross-platform mobile apps.
React Native
Flutter
Ionic
Mobile-first UI architecture
App Store & Play Store deployment
Backend Development
High-performance APIs and scalable backend systems.
Node.js
Express.js
NestJS
Sails.js
LoopBack
Microservices architecture
REST APIs & GraphQL
Databases
Designing scalable and optimized data systems.
MongoDB
MySQL / PostgreSQL
DynamoDB
Redis
Firebase / Firestore
FaunaDB
Cloud & DevOps
Reliable cloud infrastructure and automated deployments.
AWS
Google Cloud Platform (GCP)
Microsoft Azure
Docker & containerized deployments
CI/CD pipelines
Serverless architecture
Auto-scaling infrastructure
Kubernetes (basic/optional if you want)
AI / Machine Learning Expertise
I build AI-powered applications, automation systems, and intelligent tools using modern LLM and ML platforms.
Generative AI & LLMs
Google Gemini Models
Vertex AI
OpenAI APIs
AI chatbots
AI assistants
RAG systems (Retrieval Augmented Generation)
AI workflow automation
Machine Learning Platforms
Microsoft Azure AI
Azure Bot Services
Face API
Cognitive Search
Form Recognizer
Azure Machine Learning
Video Indexer
AWS AI Services
Amazon Rekognition
AI-powered image analysis
Google AI
Vertex AI
Gemini models
AI model deployment
What I Can Do For You
✔ Full-Stack Web Application Development
✔ AI-powered SaaS Products
✔ Mobile Apps (React Native / Flutter)
✔ API Development & Integration
✔ Cloud Infrastructure Setup
✔ DevOps Automation (CI/CD)
✔ Scalable Backend Architecture
✔ AI Chatbots & Intelligent Systems
✔ Performance Optimization & Scaling
Types of Projects I Build
SaaS platforms
AI applications
Startup MVPs
Enterprise dashboards
E-commerce platforms
Progressive Web Apps
Mobile apps
Automation systems
API platforms