Walid Shehzad AliFull-Stack AI Engineer & Systems Architect
I engineer production-grade AI systems, enterprise RAG pipelines, and scalable full-stack applications—bridging experimental LLM demos and reliable enterprise software with Next.js, Node.js, Python, FastAPI, and pgvector.
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Production Engineering Breakdowns
Deep dives into complex production systems: isolating core engineering bottlenecks, designing scalable backend and AI architectures, and measuring verified business impact.
Multi-Tenant Seat Allocation & Distributed Booking Engine
Multiple travel agencies and registered sub-agents were concurrently booking limited seat quotas on high-demand flight routes. Without transactional safety, concurrent requests caused race conditions and double-seat bookings, while data isolation between competing agencies risked cross-tenant exposure.
Engineered an atomic distributed seat-reservation lock mechanism with TTL-based expiration that temporarily holds seats during checkout without blocking system read throughput. Implemented strict tenant-isolated middleware using agency keys and built high-performance MongoDB aggregation pipelines to calculate real-time seat availability and quota balances dynamically.
Completely eliminated race conditions and double-booking errors during high-concurrency reservation spikes, ensured 100% tenant data isolation across agencies, and maintained seat query response times under 65ms.
High Impact Systems & Architectures
Explore robust engineering projects categorized by specialization, complete with tech stacks, industry domains, and visual previews.
AI Customer Service Agent
An AI agent that can answer customer questions and provide support. Integrated with RAG Based Knowledge base. The system is designed to handle a large volume of customer queries and provide accurate responses instantly.
Multi-Tenant Group Management System
Multi-tenant SaaS Platform for managing Groups and booking seats. Travel Agencies Offer Seats to their Registered Agents.Implemented Tenant Isolation Authentication And Authorization.Also Key Challenge was Locking Mechanism for seat booking.
Responsive E-Commerce Storefront with Admin Panel
Fully Functional Ecommerce Store with Payment Gateway Integration and Admin Panel.Implemented Stripe Payment Gateway for secure transactions.implemented Admin Panel for managing products, orders and customers.
Enterprise Headless Content Management System
Custom content management platform containerized with Docker, featuring block-based editing, multi-role publishing workflows, and Azure zero-downtime deployment.
Real-Time Telemetry & Smart Monitoring Dashboard
WebSocket-driven real-time tracking interface displaying live system metrics, anomaly detection notifications, and microservice status heartbeats.
CMS(Content Management System)
This is a content management system for a retail store.They need Dynamic website for managing their products, updating their products, managing their inventory and managing their customers.The website is also inquiry based.
Skills & technical stack
The tools I reach for most, grouped by where they show up in a project.
Languages & Frameworks
AI & Automation
Data, Cloud & DevOps
Let’s engineer your next AI product.
Available for RAG architectures, LLM agent workflows, high-concurrency Node.js/Python backends, and full-stack SaaS builds. Fast turnaround and transparent communication.