Design and build high-performance Rails APIs, optimize PostgreSQL at scale, and own backend architecture on production systems that need to last.

Icalia Labs is hiring a Senior Ruby on Rails Engineer with deep expertise in building scalable, production-grade APIs and a strong foundation in modern backend engineering. We're looking for engineers who go beyond implementation — professionals who understand how systems behave under load, how databases perform at scale, and how to design APIs that last. This is a remote contractor engagement working CST hours.

What you'll do
- Design and build high-performance APIs using Ruby on Rails.
- Write optimized PostgreSQL queries and deeply understand how data flows and scales under production load.
- Implement and maintain asynchronous and background processing systems (Sidekiq, Resque, or equivalent).
- Ensure code quality through robust RSpec testing strategies and solid automated testing practices.
- Apply best practices for API design, scalability, and long-term maintainability.




- Collaborate on architecture decisions and continuously improve system performance.

What we're looking for
- 8+ years of software engineering experience or equivalent practical background
- Strong expertise in Ruby and Rails APIs in production environments
- Clear understanding of how databases work and how to write efficient PostgreSQL queries (indexing, query optimization, performance tuning)
- Hands-on experience with background job processing systems (Sidekiq, Resque, or similar)
- Solid knowledge of AWS and Docker for cloud infrastructure and containerized environments
- Strong grasp of API best practices and backend architecture

How we engineer

The same standards every Icalia engineer is held to — and the reason our clients keep our people through acquisitions.

Craft & ownership
We write code we'd be proud to sign. You own outcomes end to end — well-tested, observable, and built to outlast the sprint that shipped it.

Same time zone as

📌 Senior Ruby on Rails Engineer (México)
🏢 Icalia Labs
📍 México