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

At CI&T, we help large enterprises transform the potential of AI into real business impact with AI Deployment, AI-native execution, and tech-integrated business solutions. With 30 years of experience in technological transformation, we accelerate innovation with expertise in Agentic SDLC, Application modernization, Data & AI, Martech and Business strategy.

We are 8,000 CI&Ters across more than 25 countries, collaborating to build solutions with real impact. AI is already part of how we work, evolve, and innovate every day.

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. #LI-TO1