Full Stack Developer (Ruby On Rails / Javascript / C#)

Senior Full Stack Engineer | Ruby on Rails – Brazil

Supporting: US-Based Fintech Company

Package: Competitive Salary + Growth Opportunity

A rapidly growing US fintech SaaS company is looking for a Senior Full Stack Engineer based in Brazil to help scale a market‑leading platform used within the alternative investments sector.

Responsibilities:

• Leading technical delivery across major product initiatives
• Designing and building scalable backend APIs using Ruby on Rails
• Developing modern frontend applications with React.js
• Collaborating closely with Product and Engineering teams to solve real user problems
• Writing clean, maintainable, and well‑tested code across the full stack
• Contributing to ongoing product and platform improvements

Qualifications:

• 3+ years of software engineering experience
• Strong commercial experience with Ruby on Rails and Reac...