[Job-30394] Senior Fullstack Developer (Java / React), Brazil

We’re looking for a talented Senior-Master Full-Stack Developer with strong expertise in React and Java (Spring Boot). You’ll play a crucial role in designing, building, and supporting enterprise-scale web applications and microservices that are performant, secure, and user-centric.

What You’ll Do:

• Design, develop, unit test, and integrate full-stack application components.

• Build scalable web applications using React on the frontend and Java 21 / Spring Boot on the backend.

• Implement RESTful APIs, microservices, and integrations with enterprise systems.

• Collaborate with UX/UI, product, architecture, and QA teams within an Agile environment.

• Create and maintain architecture, design, and system documentation.

• Ensure code quality, performance, and security, including OAuth2, OIDC, and JWT.

• Work with MySQL, Hibernate, Spring Data, and Spring Security.

• Support production systems using Kibana and APM tools, and participate in on-call rotation when needed. Demonstrated experience in monitoring and troubleshooting applications is essential.

What We’re Looking For:

• Solid experience with full-stack development.

• Strong hands-on experience with React, modern JavaScript (ES6+), DOM APIs, and JSON.

• Proficient in backend development with Java,(including old versions),and Spring Boot; recent hands-on experience is required.

• Experience with microservices and enterprise integration patterns.

• Solid experience with RDBMS (MySQL or similar) and SQL.

• Good understanding of web security standards including JWT, authentication, and other security concepts.

• Excellent problem-solving, debugging, and communication skills;

• Candidates should demonstrate a structured approach to problem-solving and clarity in communication.

• Comfortable working in the EST time zone.

• Production support experience, including a strong understanding of application error handling and standard practices.

Nice to Have:

• Familiarity with micro-frontend architecture and component libraries (e.g., Storybook, styled-components).

• Knowledge of event-driven architecture and Kafka; experience is preferred.

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