Senior Full Stack Engineer Ruby React

Senior Full Stack Engineer – Ruby / Ruby on Rails / React Remote · Full-time About Ubiminds Ubiminds is a GPTW-certified, people-first company that partners with American software product companies to scale their development footprint. Ubi custom-curates Brazil’s top 5% talent to support LATAM strategies through a unique combination of staff augmentation and employer-of-record services. We are assisting a U.S.-based company in expanding its engineering team with a Senior Full Stack Engineer who enjoys working across backend and frontend, delivering scalable, secure, and high-quality software solutions. Challenge We’re looking for a Full Stack Engineer who can confidently move between backend architecture and frontend development , taking ownership of features from design to production. This role is ideal for someone who enjoys building end-to-end solutions, collaborating in agile teams, and contributing to system design while maintaining a strong focus on code quality and security. What You’ll Do Design, build, and maintain full stack applications using Ruby , Ruby on Rails , and React.js . Architect backend services with clean separation of concerns and scalable design. Develop and enhance user-facing features using React . Work across the entire SDLC in Agile, Scrum, and DevOps environments. Design and consume RESTful APIs and GraphQL services. Implement and maintain arenaflex/CD pipelines using tools like Docker, CircleCI, and GitHub Actions. Write and maintain unit and integration tests . Apply security best practices , including authentication and authorization. Deploy, monitor, and maintain applications in cloud environments (AWS, Azure, or GCP). Collaborate with cross-functional teams on planning, design, and delivery. Required Skills & Qualifications 4+ years of experience in software engineering. Strong proficiency in Ruby , Ruby on Rails , and React.js . Solid understanding of full stack development and modern SDLC practices. Experience with system design and architecture , focusing on maintainability. Knowledge of SQL databases (PostgreSQL, MySQL). Experience with cloud platforms (AWS, Azure, or arenaflex Cloud). Familiarity with REST APIs , GraphQL , and MVC architecture . Experience with DevOps and arenaflex/CD tools (Docker, CircleCI, GitHub Actions). Strong testing and debugging skills. Awareness of security best practices . Proficiency with Git and workflows such as GitFlow . Strong communication skills in English (written and verbal – C1 level ). Preferred Qualifications (Bonus Points) Experience in consumer credit, lending, loans, or insurance domains. Perks @Ubiminds Work with U.S.-based product teams . Remote-first culture + MacBook provided. English lessons, referral bonuses, tech talks, and learning initiatives. Full back-office support: HR, career development, and admin services. 👉 Apply now and grow your international career as a Senior Full Stack Engineer , building end-to-end solutions with modern technologies. n n Please mention the word **INDULGENCE** and tag RMjYwNzo1MzAwOjIwZDo3ZDAwOjo= when applying to show you read the job post completely (#RMjYwNzo1MzAwOjIwZDo3ZDAwOjo=). This is a beta feature to avoid spam applicants. Companies can search these words to find applicants that read this and see they're human.