HAMZA NASAR Full Stack AI and SaaS Engineer Karachi, Pakistan Phone: +92 308 8977132 Email: hamzanasar144@gmail.com Portfolio: https://www.hamzanasar.com GitHub: https://github.com/hamza-nasar LinkedIn: https://www.linkedin.com/in/hamza-nasar-1363a4337 PROFESSIONAL SUMMARY Full Stack AI and SaaS Engineer with 3+ years of experience building AI agents, voice systems, SaaS platforms, realtime applications, dashboards, APIs, automation workflows, and backend-heavy products. Strong hands-on experience with Next.js, React, TypeScript, Python, FastAPI, NestJS, Node.js, PostgreSQL, MongoDB Atlas, Prisma, TypeORM, SQLAlchemy, Redis, OpenAI, Gemini, ElevenLabs, WebRTC, WebSocket, Socket.IO, LiveKit, Stripe, NextAuth, Docker, Vercel, Railway, Render, Playwright, Vitest, and pytest. Focused on maintainable architecture, production-ready user workflows, performance, SEO, authentication, billing, admin systems, and reliable deployment. CORE SKILLS Frontend: React, Next.js, TypeScript, React 19, Tailwind CSS, shadcn UI, Material UI, Framer Motion, TanStack Query, Zustand, React Hook Form, responsive UI, SEO metadata Backend: Python, FastAPI, NestJS, Node.js, Express.js, Django REST Framework, REST APIs, API architecture, JWT, OAuth, RBAC, rate limiting, service layers Databases: PostgreSQL, MongoDB, MongoDB Atlas, Mongoose, Prisma, TypeORM, SQLAlchemy, Alembic, SQLite, Redis AI and Automation: OpenAI API, Gemini AI, Google GenAI, ElevenLabs, AI agents, prompt engineering, tool calling, command routing, document intelligence, workflow automation Realtime and Voice: WebRTC, WebSocket, Socket.IO, LiveKit, PCM audio streaming, realtime messaging, audio bridges, voice workflows, avatar validation SaaS and Product: Stripe Checkout, Stripe Webhooks, NextAuth, admin dashboards, analytics dashboards, paid listings, submission flows, SEO landing pages, billing workflows, SaaS MVPs Quality and Delivery: Git, GitHub, Docker, Docker Compose, Vercel, Railway, Render, Playwright, Vitest, pytest, Postman, CI/CD basics, production debugging PROFESSIONAL EXPERIENCE Full Stack AI and SaaS Engineer Freelance and Client Projects - Karachi 2024 - Present - Built AI agents, voice workflows, realtime systems, SaaS dashboards, and backend-heavy platforms using Next.js, React, TypeScript, Python, FastAPI, NestJS, PostgreSQL, MongoDB, Redis, and OpenAI. - Implemented production patterns including admin consoles, role-based access control, Stripe payments, WebSocket and WebRTC flows, SEO pages, schema validation, database migrations, and deployment checks. - Delivered product systems across AI agents, realtime avatar workflows, SaaS directories, data platforms, and automation dashboards. - Designed product workflows around maintainability, business operations, responsive UI, clean data models, and scalable backend architecture. Full Stack Developer Linkitsoft and Product Delivery - Karachi 2024 - 2025 - Developed and maintained client-facing web applications with React, Next.js, Node.js, MongoDB, authentication, REST APIs, and third-party integrations. - Created responsive dashboards and reusable UI systems with attention to performance, state management, form handling, and operational workflows. - Improved frontend and backend reliability through schema design, request validation, refactoring, debugging, and production deployment support. Junior Full Stack Developer Slash International and Remote - Karachi 2023 - 2024 - Built modern web app interfaces, REST API integrations, authentication flows, dashboard modules, and MongoDB-backed application features. - Translated product requirements into maintainable frontend and backend implementations using React, Next.js, Express, and Tailwind CSS. - Strengthened fundamentals in deployment, debugging, responsive design, database modeling, and end-to-end product delivery. KEY PROJECT HIGHLIGHTS Personal Voice Agent - Local AI Assistant Technologies: Next.js, Python, OpenAI, WebRTC, WebSocket, ElevenLabs, SQLite - Built a local AI assistant with voice commands, realtime dashboard updates, memory, and safe action approvals. - Implemented WebRTC voice capture, OpenAI command routing, and Python-backed local actions. Kayanne Live Avatar - Realtime AI Avatar System Technologies: NestJS, Next.js, LiveKit, WebRTC, WebSocket, Google GenAI, TypeScript, Zod - Built a realtime avatar validation platform with LiveKit video, microphone capture, audio bridge, and runtime metrics. - Implemented a secure NestJS proxy and WebSocket session workflow for avatar validation. Toolverse Atlas - AI Tools SaaS Directory Technologies: Next.js 15, React 19, TypeScript, MongoDB Atlas, NextAuth, Stripe, Recharts, Zod - Built an AI tools SaaS directory with search, submissions, favorites, admin analytics, paid listings, and SEO pages. - Implemented Stripe checkout, webhooks, MongoDB Atlas workflows, and revenue dashboard features. EDUCATION Intermediate in Computer Science (ICS) Board of Karachi - 2023 ADDITIONAL STRENGTHS - AI product engineering - SaaS MVP development - Full stack web development - Backend API architecture - Realtime communication systems - Database schema design - Authentication and role-based access control - Payment and subscription workflows - SEO-friendly web applications - Production debugging and deployment