Djair Carvalho

Senior Ruby on Rails / Backend Engineer with 10+ years of experience building and maintaining production systems, APIs, background jobs, PostgreSQL-heavy applications, and internal tools. I have strong experience with Ruby on Rails, PostgreSQL, REST APIs, background processing, performance improvements, legacy system maintenance, automated testing, and production debugging. I also have solid experience with Node.js and NestJS for building structured backend services and API integrations. I enjoy working on business-critical systems where reliability, maintainability, and clear architecture matter. I have worked with remote teams and I am comfortable communicating in English, collaborating asynchronously, reviewing pull requests, writing technical documentation, and owning features from discovery to delivery. Main stack: Ruby on Rails, PostgreSQL, Sidekiq, Redis, RSpec, Docker, Node.js, NestJS, React, JavaScript/TypeScript, AWS, GitHub Actions.