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


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!
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Get to know Muhammad Bilal
Passionate Programmer
- FromPakistan
- Member sinceMar 2023
- Last delivery1 year
Languages
English, Russian, Italian, Spanish
FAQ
What is the main goal or problem you need solved?
Briefly describe the bug, feature request, or optimization task. Please include any specific error logs or screenshot links if applicable.
How is your code repository hosted and structured?
Please share your GitHub/GitLab repository access or invite (if applicable), and mention the relevant language versions (e.g., Rails 7, Ruby 3.2, Go 1.21).
What is your current database and hosting environment?
e.g., PostgreSQL / MySQL running on Heroku, AWS, GCP, Render, or Docker locally.
Is this a live production application with active users?
Yes or No

