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Abdou Shalby

@abdoushalby

Message

Senior backend engineer specializing in high-concurrency systems, performance, and cost-optimized architectures.

Egypt

Message

What I'm looking for

I seek remote roles that value building highly reliable, high-concurrency systems, enabling ownership of architecture, performance optimization, and cost-efficient infrastructure.

I am a Senior Backend Engineer with 7+ years building high-traffic, fault-tolerant systems focused on scale, performance, and reliability.

As a Principal Engineer / Technical Lead, I architected a real-time multi-vendor marketplace supporting 30,000+ concurrent connections and 200k+ users, implemented distributed locking and event-driven patterns, and led a migration from monolith to microservices.

I have reduced AWS infrastructure costs through containerization and resource optimization, improved API latency by 40% via indexing and query tuning, and designed distributed order processing and idempotency solutions to eliminate race conditions.

I bring deep expertise in Laravel, Node.js, Redis, RabbitMQ, MySQL/PostgreSQL, Docker/Kubernetes, and AWS, and I seek to apply that experience to systems that require high concurrency, reliability, and efficient infrastructure usage.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Codeivity

Jan 2021 - Present (5 years 1 month)

Acted as principal engineer to architect a real-time multi-vendor marketplace supporting 30,000+ concurrent connections and 200k+ users; reduced AWS costs by 30% via containerization and improved API latency by 40% through indexing and query optimization.

WebSockets Redis Docker Kubernetes AWS Event Driven Architecture Microservices

Senior Backend Consultant

Remote Projects

Jan 2020 - Jan 2021 (1 year)

Delivered scalable backend systems for healthcare, logistics, and enterprise clients, designing a national medical verification platform and secure RESTful APIs with strict validation and transaction consistency.

API Design & Security Transaction Consistency Laravel Scalability Fraud Detection System Integration

Backend Developer

MsarWeb

Jan 2019 - Jan 2020 (1 year)

Developed and refactored production RESTful APIs using Laravel, integrated payment gateways, and optimized MySQL queries and indexing to improve response times and database efficiency.