Design and build high-performance Rails APIs, optimize Postgre SQL 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 doDesign and build high-performance APIs using Ruby on Rails.Write optimized Postgre SQL 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 llaborate on architecture decisions and continuously improve system performance.What we're looking for8+ years of software engineering experience or equivalent practical backgroundStrong expertise in Ruby and Rails APIs in production environmentsClear understanding of how databases work and how to write efficient Postgre SQL 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 environmentsStrong grasp of API best practices and backend architectureHow we engineerThe same standards every Icalia engineer is held to — and the reason our clients keep our people through acquisitions.Craft & ownershipWe 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 your team, clear written communication, and the autonomy to move without being managed. Our rituals are why clients call our process de reviews that teach, documented patterns, and senior engineers who lift the bench. You'll grow faster here than on most in-house teams.AI-augmented, human-accountableWe use modern AI tooling to multiply output — but a named human always owns the quality, security, and judgment behind every line that ships.Why IcaliaYour next step.Since 2012 we've embedded engineers into US and general product teams from Monterrey and across Lat Am — doing US-quality work without leaving home. Our people have shipped through real acquisitions (RTS, Everlance) and stayed every time.You work directly with product teams that respect senior engineers, on problems that matter — not ticket factories. Competitive compensation, real career mobility, and a bench of peers worth learning from.10+years placing engineers200+engineers placed95%100%stayed through acquisitions

📌 Senior ruby on rails engineer (Baja California)
🏢 Icalia Labs
📍 Baja California