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[Job-30394] Senior Fullstack Developer (Java / React), BrazilCI&T · Brazil
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[Job-30394] Senior Fullstack Developer (Java / React), Brazil

🗓️ Posted 2026-08-28 Brazil Homeoffice Hybrid ICT
💰 Salary Not shared 📊 Market US$12,000–US$22,000/mo

About the Company

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.

Responsibilities

  • ● 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.
  • ● 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.

Requirements

  • ● 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.