Senior Ruby on Rails Engineer (12+ years)
Building scalable, reliable backend systems for SaaS, fintech, and high-traffic platforms.
I specialize in modernizing legacy systems, scaling Rails applications, and designing distributed architectures that teams can evolve safely over time. I care deeply about code quality, observability, and developer experience.
- 🏗 Architect & scale Rails systems (monolith → modular / services when it makes sense)
- 🚀 Improve performance & reliability (profiling, caching, background jobs, DB tuning)
- 🔄 Modernize legacy codebases (Rails upgrades, dependency cleanup, test coverage)
- 🤖 Build developer tooling & CI/CD to remove friction and reduce production risk
- 🧠 Mentor engineers and establish pragmatic engineering standards
- 💮 Full-stack development to create applications E2E from zero to production.
Backend
- Ruby, Ruby on Rails, Go, Node, Nest.js
- PostgreSQL, Redis, Kafka
- Karafka, Sidekiq, Background processing
Frontend (when needed)
- JavaScript, HTML, CSS, Tailwind, React, Stimulus, Hotwire
Infrastructure & Tooling
- Docker, AWS, Heroku
- CI/CD pipelines
- Nix / NixOS
- Git, Neovim, Tmux
Architecture
- Domain Driven Design
- Layered Architecture
- Design Patterns
Declarative NixOS & development environment
- Reproducible system + dev setup
- Fast onboarding across machines
- Opinionated, productivity-focused configs
👉 https://github.com/cesargomez89/dotflakes
Personal dotfiles & editor workflows
- Neovim-first workflow
- Shell + editor automation
- Built for long-term maintainability
👉 https://github.com/cesargomez89/kiddots
- Senior / Staff Backend roles
- Ruby on Rails–heavy systems
- Product-focused teams
- Remote-friendly environments
I value clear ownership, sustainable engineering practices, and teams that care about long-term quality.