Muhammad Umar

Backend Software Engineer with 2 years of experience designing and shipping production backend systems in Node.js/Express, with additional experience in Laravel. Skilled in REST API architecture, asynchronous job processing, third-party service orchestration, and multi-gateway payment integrations. Focused on reliability, security, and backend systems that hold up under real production load.

Backend Engineer at Eastlancers (2024-07 – Present)

• API & Service Architecture: Architected and deployed RESTful endpoints and event-driven backend services across production SaaS applications, primarily in Node.js/Express with additional services in Laravel.
• Asynchronous Pipelines: Designed queue-based background processing using BullMQ (Node.js) and Laravel Horizon to handle heavy third-party integrations off the main HTTP thread, eliminating API timeouts.
• Payment & Security Engineering: Built secure multi-gateway billing systems (Stripe, Razorpay) featuring dual-layer webhook signature verification, automated retries, and idempotent transaction processing.
• Performance Optimization: Optimized MongoDB/MySQL schemas and implemented Redis caching strategies for high-frequency endpoints, reducing query overhead and latency.
• Containerization & Reliability: Containerized Node.js and Laravel environments on Docker with AWS (EC2, S3) deployments, backed by Sentry error tracking for rapid failure resolution.

Bachelor of Science in Computer Science – COMSATS University Wah Cantt (2020-09 – 2024-07)