Zeeshan

Full Stack Developer | React, Next.js, Nodejs, Stripe & AI Integration

Upwork • Trabajador autónomo

May 2025 - Present • 1 yr 3 mos

I'm a Senior Full Stack & React Native Engineer with 8+ years of experience helping startups and businesses build fast, secure, and scalable applications from React & Next.js web apps to React Native mobile apps, Node.js backends, Stripe payment systems, and OpenAI-powered features. I don't just write code. I take ownership of the product and deliver clean, maintainable solutions that are built to grow. WHAT I BUILD FOR YOU - Full Stack Web Apps: React.js, Next.js, TypeScript, Tailwind CSS, Redux - React Native Mobile Apps: iOS & Android, Expo, React Navigation, push notifications - Stripe Payment Integration: Subscriptions, PaymentSheet, Checkout, Webhooks, Customer Portal, Billing - AI-Powered Apps & Chatbots: OpenAI API, GPT-4, LangChain, RAG, AI Agents, LLM Pipelines - Scalable Backend & REST APIs: Node.js, NestJS, Express.js, GraphQL, Python FastAPI - SaaS Platforms: Multi-tenant architecture, RBAC, auth, subscriptions, admin dashboards - Real-Time Systems : WebSockets, Firebase, live notifications - Database Design & Optimization: PostgreSQL, MongoDB, MySQL, Redis - Cloud & DevOps: AWS (EC2, S3, Lambda), Docker, Vercel, CI/CD, GitHub Actions - Automation Workflows: AI automation, vector databases, workflow pipelines

FULL STACK DEVELOPER: Reactjs Nextjs Node Wordpress ReactNative Expo!

Fiverr • Trabajador autónomo

Dec 2021 - Present • 4 yrs 8 mos

Delivered high-quality services to clients worldwide through Fiverr. Communicated with clients to understand project requirements. Managed multiple projects while meeting deadlines. Maintained high customer satisfaction through timely delivery and revisions. Built long-term client relationships and handled project management independently.