Sheikh S.

I’m a Senior Full Stack Engineer and Technical Lead with around 10 years of experience building scalable saas platforms, AI powered applications, marketplaces, fintech products, real estate platforms and enterprise software. Over the years I've worked with startups, growing businesses and enterprise clients, taking products from MVP through production while also leading engineering teams, making architectural decisions and mentoring developers. My focus has always been on building software that is maintainable, scalable and reliable rather than simply delivering features. My experience spans the complete software development lifecycle, from architecture and database design through frontend, backend, cloud infrastructure, deployment and long term maintenance. CORE TECHNOLOGIES Frontend: React | Next | TypeScript | JavaScript | Vite | Tailwind CSS | Material UI | Ant Design | Chakra UI | Vue | Nuxt | Angular | Gatsby | Electron Backend: Node | Express | NestJS | Fastify | Python | Django | Flask | REST APIs | GraphQL | WebSockets Databases: PostgreSQL | MySQL | MongoDB | Supabase | Redis | DynamoDB | Firestore | SQLite Cloud & DevOps: AWS | Azure | Docker | Kubernetes | GitHub Actions | GitLab CI/CD | Bitbucket Pipelines | Vercel | Netlify | Nginx AI & LLM: OpenAI | Claude | Gemini | LangChain | LangGraph | LlamaIndex | Pinecone | Weaviate | FAISS | RAG | Semantic Search | AI Agents | Prompt Engineering | Streaming Responses | Vector Search Mobile: React Native | Flutter | Expo | Firebase | Push Notifications | Maps & Geolocation | In App Purchases | App Store & Google Play Deployment Payments: Stripe | PayPal | Paddle | Circle | Google Pay | Apple Pay Headless CMS: Payload CMS | Storyblok | Sanity | Contentful | Strapi AI & LLM DEVELOPMENT Over the past few years, I've worked extensively on AI powered SaaS applications, integrating Large Language Models into production systems rather than simple prototypes. My experience includes AI assistants, RAG pipelines, semantic search, vector databases, streaming responses, prompt engineering, document intelligence, workflow automation, structured outputs, AI agents and cost optimized prod I've built AI powered products including conversational assistants, document intelligence, workflow automation, semantic search and enterprise AI solutions. MOBILE APPLICATION DEVELOPMENT I have around 5 years of hands on experience with React Native and 3 years with Flutter, building production mobile applications for both iOS and Android. My experience includes authentication, real time synchronization, push notifications, maps and geolocation, payment integrations, camera and media features, in app purchases, Firebase, Expo, native modules and production deployments to both app stores. Experience includes: INDUSTRIES AI Platforms | SaaS | Real Estate | FinTech | Healthcare | HR Tech | Education | Marketplaces | Ride Hailing | Wellness | Web3 WHAT CAN I HELP BUILD ✔ AI Powered SaaS Platforms ✔ MVP Development ✔ Enterprise Web Applications ✔ Multi Tenant SaaS Platforms ✔ React & Next.js Applications ✔ Full Stack Development ✔ API Development & Third Party Integrations ✔ Authentication, RBAC & Security ✔ Supabase & PostgreSQL ✔ Stripe & Subscription Billing ✔ AWS Infrastructure & CI/CD ✔ Architecture Reviews & Technical Leadership ✔ Performance Optimization & Production Debugging ✔ Long Term Product Development HOW I WORK I believe successful products come from strong communication, thoughtful architecture and taking ownership rather than simply completing assigned tasks. I proactively identify risks, communicate clearly, challenge technical decisions when appropriate and focus on building software that remains maintainable as products grow. Whether working independently or alongside an existing engineering team, I aim to become a trusted technical partner who helps move the product forward. If you're looking for someone who can build from the ground up, improve an existing platform, integrate AI capabilities or provide senior technical leadership, I'd be happy to discuss how I can help bring your product to the next stage. Whether you need someone to build a product from the ground up, stabilize an existing platform, integrate AI capabilities or provide technical leadership for a growing engineering team, I can help take the product from idea to production while keeping quality, security and maintainability at the center of every decision.