I will debug, refactor, and build scalable backends in ruby on rails or go

B
bilaldev2811
B
bilaldev2811
Muhammad Bilal

About this gig

As a Senior Backend Engineer with 5 years of industry experience, I help founders, CTOs, and engineering teams debug, modernize, and scale their server-side applications. Whether you need a quick emergency bug fix, a major gem dependency upgrade, or a complete microservice extraction, I write clean, well-tested, and maintainable code.

What I Can Do For You:

  • Ruby on Rails: Version upgrades (Rails 5/6 to 7+), gem dependency fixes, ActiveRecord query profiling, N+1 query elimination, and background job optimization (Sidekiq).
  • Golang (Go): Building high-concurrency microservices, gRPC/REST APIs, memory optimization, and channel-based thread management.
  • Database & Performance: Diagnosing database locks, query indexing, and schema migrations (PostgreSQL / MySQL).
  • Modernization & DevOps: Refactoring legacy codebases, writing unit/integration tests, and containerizing applications with Docker.

Why Choose Me?

  • Production-Grade Code: Clean, documented, and fully tested pull requests.
  • Architecture-First Mindset: Zero downtime migrations and safe database refactoring.
  • Fast Communication: Clear updates and progress tracking throughout the order.

Please message me with a brief summary!

Respect third-party rights

Please be aware that it is against Fiverr's policies for sellers to include themes, templates, or any other elements that infringe third-party rights or applicable laws in the delivered work. Read more about in our Guide to Responsible Digital Creation.

Get to know Muhammad Bilal

Muhammad Bilal

Senior Software Engineer for Custom Web Apps and Cloud Architecture

5.0(7)
  • FromPakistan
  • Member sinceMar 2023
  • Last delivery1 year
  • Languages

    English, Russian, Italian, Spanish
Hi! I’m Muhammad Bilal, a Senior Full-Stack and Backend Engineer with over 4 years of experience building high-performance web applications, scalable APIs, and automated systems. I specialize in backend architecture using Go, Ruby on Rails, and Python, paired with modern frontends in React and Next.js. My expertise covers cloud infrastructure with Docker, Kubernetes, and CI/CD pipelines, alongside advanced integrations like AI agent workflows, WebRTC video, and custom data processing. Whether you need a complete startup MVP or microservices optimization, send me a message to get started!

My Portfolio