Software engineer passionate about system design and distributed architectures. I love solving complex technical challenges and building scalable, production-grade backend systems. 6+ years of experience with Python and Laravel, cloud technologies, and modern frameworks.

Open-source contributor to Apache Airflow — improving code quality and documentation.

I design and architect backend systems that are reliable, scalable, and maintainable. My passion is system design — understanding how components interact, optimizing for performance, and creating architectures that grow with business needs.

• System Design & Architecture — designing distributed systems, microservices, and scalable APIs
• Backend Engineering — Python, FastAPI, Laravel for high-performance applications
• Cloud & Infrastructure — deploying and managing production systems
• Database Architecture — PostgreSQL, MySQL, MongoDB optimization and schema design
• Performance Engineering — profiling, debugging, and optimizing system efficiency
• System Integration — third-party APIs, payment systems, multi-channel synchronization

Backend & Architecture: Python · FastAPI · Django · Flask · PHP · Laravel
Cloud & Infrastructure: Docker · Redis · CI/CD · Linux · AWS Lambda
Queue & Jobs: Laravel Queues · Background Jobs · Async Processing
Frontend: Vue · React · Inertia · Tailwind
Data: PostgreSQL · MySQL · MongoDB
APIs & Integration: Stripe · Shopify · Amazon · eBay · Etsy · Barcode Scanning

Built entire platform from scratch in Laravel 8, managing 50+ warehouse locations processing 10,000+ daily orders:

• Warehouse Management System — Complete WMS with bins, locations, and pallet configuration for optimal space utilization
• Multi-Channel Integration — Real-time order syncing for Shopify, Zid, and regional platforms (Saudi Arabia, UAE) via webhooks
• Smart Container Allocation — Automated bin/pallet pre-allocation before container arrival, reducing receiving time by 40%
• Mobile Picking Application — Web-based barcode scanning for warehouse workers, improving pick accuracy to 99.5%
• Storage Occupancy & Auto-Invoicing — Monthly usage tracking with automated invoice generation at month-end
• Subscription System — Stripe payment processing for recurring warehouse services
• Job Queue Architecture — Async processing with Laravel queues, jobs, and Redis handling 100K+ background tasks daily
• End-to-End Fulfillment — Container arrival → receiving → storage → picking → shipment tracking

Built from scratch, managing 3000+ product listings across multiple marketplaces with 95% listing success rate:

• Dynamic Form Library — Node.js library with Vue.js/Inertia dynamically rendering 2000+ product types (Amazon, Shopify, eBay, Etsy)
• Intelligent Schema Automation — Python microservice on AWS Lambda auto-resolving listing failures via Amazon API, reducing manual fixes by 80%
• AI Content Generation — OpenAI integration for product descriptions and Pebli AI for image generation, processing 1000+ items daily
• Real-Time Inventory Sync — Webhook-driven engine syncing inventory across platforms in under 2 seconds
• Automated Error Recovery — Self-service system notifying operations and sellers, improving resolution time by 60%
• Payment Integration — Stripe processing and subscription management for SaaS revenue

Production support and feature development for enterprise CRM serving 500+ active businesses:

• Legacy System Migration — Migrated entire codebase from legacy PHP to Laravel 11, improving performance by 3x
• Full-Stack Development — Backend APIs, database architecture, and frontend rebranding across 15+ modules
• AI Voice Agent Integration — OpenAI Realtime API voice assistant enabling hands-free CRM operations
• Production Operations — 99.9% uptime maintaining critical business operations with <2hr incident resolution

Open to new opportunities — Looking for my next challenge in system design, backend architecture, or distributed systems.

Active in open source — Contributing to Apache Airflow and other Python-based projects.

Apache Airflow Contributor

• Fixed misleading documentation about Python 3.12 features
• Contributed to improving code quality and developer experience

I focus on understanding the problem before jumping to solutions. I believe in:

• Clear technical specifications and requirements
• Small, shippable increments with fast feedback loops
• Writing maintainable code that others can understand
• Systems that solve business problems, not just technical exercises

Email: mrehsanellahi@gmail.com
LinkedIn: linkedin.com/in/mrehsanellahi
GitHub: github.com/MrEhsanEllahi

I'm actively looking for opportunities to work on challenging technical problems — whether that's designing distributed systems, optimizing performance, or building scalable backend architectures.

If you're building something ambitious and need an engineer who loves system design and owns outcomes, let's talk.