Senior Fullstack Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Fullstack Engineer based in Brazil.

As a Senior Fullstack Engineer, you will help build and evolve the technology powering critical financial and billing operations. You will work across the full stack, with a strong focus on developing modern, reliable front-end applications using React and TypeScript. You will also contribute to back-end services and APIs built with Ruby on Rails, using GraphQL to connect applications and systems. Working closely with Product and engineering colleagues, you will help translate business needs into scalable technical solutions. This role offers opportunities to take ownership of technical initiatives, improve development practices, and influence the evolution of the codebase. You will also contribute to team growth through collaboration, knowledge sharing, and mentoring.

Accountabilities

You will contribute to the design, development, testing, and continuous improvement of applications supporting financial operations, while taking an active role in technical decision-making and team collaboration.

• Develop clean, efficient, maintainable, and testable code using React, TypeScript, and Ruby.
• Build, update, and integrate front-end features and components within React applications.
• Implement and maintain Ruby on Rails APIs to ensure reliable communication between front-end and back-end systems.
• Work with GraphQL to support data exchange between single-page applications and their back-end services.
• Write automated tests, perform manual testing, and review colleagues’ code to maintain high-quality standards.
• Collaborate with Product and engineering teams to align technical solutions with business objectives and non-functional requirements.
• Contribute ideas, improve team pr...

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