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 CI/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 Google Cloud). Familiarity with REST APIs, GraphQL, and MVC architecture. Experience with DevOps and CI/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