Muhammad Ahmad

Senior Full-Stack AI Engineer & SaaS Architect

Nov 2025 - Feb 2026 • 3 mos

Architected and engineered a production-grade Multi-Modal AI SaaS platform that transforms product images into professional marketing assets (thumbnails, product ads). The system handles real revenue, AI orchestration, and high-concurrency scaling with a "production-first" mindset. Live Demo: https://advizi.vercel.app Key Engineering Achievements: Atomic Financial Logic: Implemented MongoDB atomic operators ($inc with pre-conditions) for a high-integrity credit system, preventing double-spending and fraud in high-concurrency environments without distributed locks. Multi-Modal AI Orchestration: Integrated Google Gemini models (3 Pro for images, VEO3 for video) into a unified content generation pipeline. Asynchronous Pipeline: Built a non-blocking video processing workflow using 202 Accepted + client-side polling for 2–5 minute generation tasks, avoiding HTTP timeouts and server overload. Stateless Serverless Scaling: Designed a stateless Vercel serverless backend that scales horizontally from 1 to 1,000+ concurrent requests automatically. Secure Webhooks: Implemented an idempotent webhook receiver for Clerk & Svix, ensuring 100% financial accuracy for user credits and subscription tiers. Production DevOps: Integrated Sentry for real-time error tracking and Cloudinary CDN, reducing global latency by up to 60%. Business Impact: Delivered a Zero-Ops, cost-efficient platform capable of supporting a funded startup's operational needs with high reliability for paying customers.

Full-Stack Developer | MERN E-Commerce Platform

Aug 2025 - Dec 2025 • 4 mos

Designed and developed a production-ready full-stack e-commerce platform using the MERN stack with TypeScript, from schema design to frontend UI, prioritizing performance, security, and scalability. Live Demo: https://ecamp.vercel.app Key Responsibilities: Full-Stack Architecture: Built the entire application from scratch using MongoDB, Express, React, Node.js (TypeScript). API Development: Designed and documented 60+ RESTful APIs using a clean controller–service–repository pattern. Security & Auth: Implemented JWT-based auth (access/refresh tokens) and Firebase Google Auth. Transactional Systems: Built real-time cart management, multi-step checkout, and automated order processing. Payment Integration: Integrated Stripe API for secure transactions plus flexible Cash on Delivery (CoD). Admin Dashboard: Created a role-based access control (RBAC) dashboard for inventory, orders, and analytics. Optimization: Optimized MongoDB queries and implemented custom middleware for global error handling and data validation. Key Achievements: Designed a backend capable of handling concurrent requests via efficient load management and DB indexing. Reduced API response times through query optimization and efficient data fetching. Established a type-safe, maintainable codebase, significantly reducing runtime errors and improving development velocity. Impact: Delivered a production-grade e-commerce system with strong data consistency and security, suitable for a growing startup or retail business.