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Senior Backend Engineer with 6+ years of experience, including 2+ years in full-time freelance roles, specializing in payment-driven, scalable backend systems, APIs, and multi-tenant SaaS platforms. Expert in Laravel, PHP, MySQL, AWS, and Go microservices, with proven experience building high-scale, mission-critical systems handling thousands of users and millions in transactions. Strong track record in ownership, team leadership, and backend architecture, delivering reliable, high-performance platforms for international clients and remote-first teams.…Senior Backend Engineer with 6+ years of experience, including 2+ years in full-time freelance roles, specializing in payment-driven, scalable backend systems, APIs, and multi-tenant SaaS platforms. Expert in Laravel, PHP, MySQL, AWS, and Go microservices, with proven experience building high-scale, mission-critical systems handling thousands of users and millions in transactions. Strong track record in ownership, team leadership, and backend architecture, delivering reliable, high-performance platforms for international clients and remote-first teams.

Muhammad Afaq Umar

Back-End Developer, Full Stack Developer, Web Developer, +2

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Senior Backend Engineer with 6+ years of experience, including 2+ years in full-time freelance roles, specializing in payment-driven, scalable backend systems, APIs, and multi-tenant SaaS platforms. Expert in Laravel, PHP, MySQL, AWS, and Go microservices, with proven experience building high-scale, mission-critical systems handling thousands of users and millions in transactions. Strong track record in ownership, team leadership, and backend architecture, delivering reliable, high-performance platforms for international clients and remote-first teams.…Senior Backend Engineer with 6+ years of experience, including 2+ years in full-time freelance roles, specializing in payment-driven, scalable backend systems, APIs, and multi-tenant SaaS platforms. Expert in Laravel, PHP, MySQL, AWS, and Go microservices, with proven experience building high-scale, mission-critical systems handling thousands of users and millions in transactions. Strong track record in ownership, team leadership, and backend architecture, delivering reliable, high-performance platforms for international clients and remote-first teams.

Available to hire

Senior Backend Engineer with 6+ years of experience, including 2+ years in full-time freelance roles,
specializing in payment-driven, scalable backend systems, APIs, and multi-tenant SaaS
platforms. Expert in Laravel, PHP, MySQL, AWS, and Go microservices, with proven experience
building high-scale, mission-critical systems handling thousands of users and millions in
transactions. Strong track record in ownership, team leadership, and backend architecture,
delivering reliable, high-performance platforms for international clients and remote-first teams.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Backend Engineer at CodeTalker Innovations

November 1, 2023 - Present

Freelance / Remote role for Prescription Hope — a healthcare medication assistance platform. Led backend development in PHP/Laravel/CodeIgniter on AWS, designing two interconnected platforms: RXI (internal operations) and Manage (patient & broker-facing). Built scalable backend systems supporting 90,000+ patients and $10M+ monthly recurring payments; designed scalable DB architecture (indexes, views) and implemented REST APIs with custom authentication powering an Angular front-end. Created 20+ cron jobs for billing, renewals, notifications, and automation. Implemented secure APIs and GraphQL endpoints enabling real-time collaboration for thousands of paying clients. Owned backend architecture, deployment, and production stability in collaboration with frontend and QA teams. Tech: PHP (Laravel, CodeIgniter), MySQL, Redis, S3, SQS, Lambda, GraphQL, AWS; Docker, Nginx, Linux; Go microservices; Node.js, Python (working knowledge).

Senior Backend Engineer at Contrive Solutions

February 1, 2021 - November 1, 2023

Led backend development for Veva Collect, a high-traffic B2B music collaboration platform used by major labels and Grammy-winning producers. Owned backend architecture, deployment, and production stability while collaborating with frontend and QA teams. Scaled backend to handle ~5,000 file uploads/day; individual files up to 10GB; aggregated shares exceeding 25GB per session. Built components using AWS load balancing to prevent production outages under peak loads. Implemented secure REST APIs and GraphQL endpoints powering real-time collaboration and file handling for thousands of paying clients. Implemented ZIP archiving for asset bundles (SQL + Lambda + Go) and integrated Redis, S3, SQS, Lambda-based microservices. Technologies used: Laravel, AWS, Go, Docker, Nginx, Linux; MySQL, Redis.