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Mohamed Samir

@mohamedsamir1

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Senior backend engineer specializing in Golang, PHP, and scalable API and microservice architectures.

Egypt

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What I'm looking for

I seek senior backend roles focused on scalable APIs, microservices, and performance optimization where I can lead technical direction, mentor teams, and improve system reliability.

I am a senior backend engineer with 6+ years building high-performance web applications, APIs, and microservice systems using Golang, PHP (Laravel), and modern tooling. I focus on performance optimization, database tuning, refactoring for maintainability, and integrating third-party services to deliver scalable, reliable production systems.

As a technical leader I’ve decoupled legacy modules into microservices, reduced API response times by up to 80%, built gRPC services and multi-driver translation packages, and launched production Shopify/BigCommerce integrations and ad-platform tooling. I follow TDD, SOLID principles, and agile practices while mentoring teams to improve code quality and system design.

Experience

Work history, roles, and key accomplishments

Current

Senior Backend Engineer

Current

Gathern

Aug 2024 - Present (1 year 5 months)

Acting as Backend Chapter Lead; decoupled legacy pricing and search modules into microservices, built gRPC server package and dynamic content/segmentation services, and improved system performance and maintainability.

Laravel gRPC Microservices MongoDB MySQL Redis Docker Kubernetes

Backend Software Engineer

WalaPlus

Dec 2023 - Jul 2024 (7 months)

Diagnosed and resolved multiple performance bottlenecks in high-traffic APIs (reducing response times 60–80%), fixed critical SQL injection issues, refactored codebase, and dockerized internal microservices.

PHP MySQL Query Optimization Docker Redis ELK & Security Profiling

Senior Backend Engineer

Convertedin

Dec 2023 - Jun 2024 (6 months)

Built high-performance e-commerce APIs and front-store for vendors and a standalone real-estate app optimized for lead-generation ads, and implemented Google Product Taxonomy API integration.

PHP Laravel MySQL Performance Optimization Docker Golang PostgreSQL Next.js

Backend Developer

Convertedin

Jan 2020 - Dec 2023 (3 years 11 months)

Built and deployed Shopify & BigCommerce apps, integrated ad platforms, optimized database performance (60%+ page load reduction), developed Pixel Tracking SDK, EmailAds service, video creation service, and chatbot engine using OpenAI/Gemini.

PHP Laravel MySQL Redis Shopify BigCommerce API Integration Performance Tuning

Fullstack Developer

Wasel

May 2019 - Sep 2019 (4 months)

Troubleshot and resolved bugs in features used by thousands of users and integrated payment gateways to improve platform reliability and transactions.

PHP JavaScript Payment Integration Debugging MySQL HTML CSS Vue.Js

Fullstack Developer

4Soft

Apr 2019 - Sep 2019 (5 months)

Architected and delivered single-vendor e-commerce and real-estate websites handling thousands of customers, focusing on scalability and user experience.