[Job - 28513] Senior Java Developer, Brazil at CI&T

We are tech transformation specialists, uniting human expertise with AI to create scalable tech solutions. With over 8,000 CI&Ters around the world, we’ve built partnerships with more than 1,000 clients during our 30 years of history. Artificial Intelligence is our reality. We are looking for a Mid-Level Java Developer help design, build, and maintain scalable, high-quality web applications. You will work across the entire stack, from modern frontend interfaces to robust backend services, collaborating closely with product, design, and other engineering teams.   Responsibilities: Design, build, and maintain backend services using Java 17/21 and Spring Boot. Implement and evolve REST and gRPC APIs following best practices and versioning standards. Ensure service reliability through unit/integration tests, troubleshooting, and root-cause analysis. Work with PostgreSQL (schema design, performance tuning) and integrate with caching layers (Redis). Build and debug containerized services using Docker and deploy them on Kubernetes (GKE). Apply security fundamentals: OAuth2/OIDC, JWT validation, RBAC, and secure coding practices. Collaborate with cross-functional teams, ensuring clear communication and ownership of deliverables. Contribute to CI/CD workflows (Tekton/Jenkins, ArgoCD) and follow GitOps principles. Participate in technical discussions, design reviews, and mentor team members when needed. Requirements: Strong experience with Java (17 or 21) and Spring Boot in production systems. Solid understanding of REST APIs and familiarity with gRPC concepts. Hands-on experience with OAuth2/OIDC, JWT, and backend security fundamentals. Proficiency with PostgreSQL and JPA/Hibernate. Practical experience with Docker and Kubernetes (deployments, debugging, ConfigMaps/Secrets). Ability to troubleshoot distributed systems, analyze logs, and diagnose performance issues. Effective communication, transparency, and resilience working in fast-paced, multicultural teams. Advanced English. Nice-to-have: Kafka or other event-driven technologies. Proficiency in NoSQL databases Redis (caching, ephemeral data). Experience with GitOps (ArgoCD), Tekton pipelines, or Helm/Kustomize. Exposure to GCP services (GKE, IAM, Cloud Logging/Monitoring). Basic understanding of OPA or policy-based access control. Knowledge of WebSockets or streaming APIs. Background in prototyping or integrating AI-driven automation. At CI&T, we are driven by Collaboration, Innovation, and Transformation. Join us to be part of a vibrant team that leverages cutting-edge technologies, including AI, to create impactful solutions. We believe in fostering a culture of learning and growth, where your expertise can shine and make a difference. If you're ready to take your career to the next level, we encourage you to apply! Our benefits: -Health and dental insurance -Meal and food allowance -Childcare assistance -Extended paternity leave -Partnership with gyms and health and wellness professionals via Wellhub (Gympass) TotalPass; -Profit Sharing and Results Participation (PLR); -Life insurance -Continuous learning platform (CI&T University); -Discount club -Free online platform dedicated to physical, mental, and overall well-being -Pregnancy and responsible parenting course -Partnerships with online learning platforms -Language learning platform And many more! More details about our benefits here: [Upgrade to PRO to see link] At CI&T, inclusion starts at the first contact. If you are a person with a disability, it is important to present your assessment during the selection process. See which data needs to be included in the report by clicking here.This way, we can ensure the support and accommodations that you deserve. If you do not yet have the assessment, don't worry: we can support you in obtaining it. We have a dedicated Health and Well-being team, inclusion specialists, and affinity groups who will be with you at every stage. Count on us to make this journey side by side.