Principal Software Developer (Ruby on Rails & React) - Freelancer

Job description

We’re specifically looking for a Principal Software Developer (Ruby on Rails & React) - Freelancer What We’re Looking For: What do we mean by freelance? Read more at Monterail Tech Network - 8+ years of experience in software development, with deep, senior-level expertise in Ruby on Rails and React - A proven senior profile, someone who doesn’t just execute, but defines direction, shapes systems, and confidently makes architectural and product decisions - Strong sense of end-to-end ownership: you are comfortable setting the roadmap, identifying gaps, and continuously building on top of existing systems without needing close guidance - A senior-level commitment to quality, with extensive experience designing and maintaining robust test suites; testing is a core part of how you build, not an afterthought - Clear and demonstrated focus on admin panels and internal tooling, with the maturity to design for usability, maintainability, and long-term evolution (not user-facing products) - Experience working closely with internal stakeholders, with the communication skills and seniority to translate needs into well-structured solutions across varying levels of complexity - Background in sma...