Senior Java Developer (Core Platform)

Description

Job Summary: Design, develop, and evolve core platform services and components—including engines supporting business operations—in an agile and collaborative environment. Key Highlights: 1. Work on the development and evolution of core platform services 2. Participate in the technical design of solutions and apply best practices in architecture 3. Develop and evolve interfaces in Angular or React using micro-frontends **Date:** March 18, 2026 **Location:** São Paulo, São Paulo **Company:** B3 S.A. – Brasil, Bolsa, Balcão **About the job** **Position:** Senior Java Developer (Core Platform) **Location:** São Paulo/SP **Publication date:** 03/18/26 **Your day-to-day responsibilities** * Design, develop, and evolve core platform services and components—including workflow engine, integration engine, rules engine, cockpit, and others; * Develop, maintain, and evolve core platform services and components—including engines supporting business operations and the cockpit used by internal teams; * Participate in the technical design of solutions, contributing to the application of architecture and development best practices; * Implement and maintain APIs and integrations with internal and external systems, ensuring security, reliability, and thorough technical documentation; * Develop and evolve interfaces in Angular or React integrated into a micro-frontend architecture; * Apply automated testing (unit, integration, end-to-end, and performance) and CI/CD best practices, contributing to delivery quality and predictability; * Support monitoring and improvement of service performance, resilience, and observability under your responsibility. **Team responsibilities** The team is responsible for developing, evolving, and maintaining the engines that support an event-driven platform critical to the over-the-counter business and modernization of products and services. **What we expect from you** * Completed undergraduate degree; * Experience in Java development using modern frameworks—especially Spring Boot and/or Quarkus; * Experience with microservices architecture, REST APIs, and event-driven solutions; * Knowledge of micro-frontend architecture and frontend development experience with Angular or React in enterprise applications; * Experience with cloud platforms (AWS, Azure, GCP, OCI) and usage of foundational infrastructure, security, and observability resources; * Knowledge of containerization and orchestration (Docker, Kubernetes) and use of CI/CD pipelines; * Experience with messaging and/or event streaming (e.g., Kafka or RabbitMQ); * Knowledge of relational databases and, preferably, familiarity with NoSQL databases; * Experience with CI/CD pipelines (e.g., GitHub Actions, Jenkins, Azure DevOps, or similar); * Knowledge of Java application security (OAuth2, JWT, OWASP Top 10, API hardening); * Familiarity with code quality and security analysis tools (SonarQube, SAST/DAST); * Knowledge of observability applied to applications (structured logs, metrics, distributed tracing, dashboards in tools such as Dynatrace, Prometheus, Grafana, etc.); * Experience working in agile teams and applying engineering best practices (Clean Code, automated testing, code reviews); * Knowledge of agents in the context of artificial intelligence—including concepts of agent orchestration, tools, and integrations with generative AI services—is a plus. **Benefits** **Profit Sharing Program** (PLR) **Medical and dental assistance** (Bradesco Saúde) **Meal allowance** (R$ 600/month) **Food voucher** (R$ 50 per business day) **Transportation voucher** and partial reimbursement for shuttle services **Private pension plan** **Maternity leave** (up to 180 days) and extended paternity leave **Childcare/babysitter allowance** **Wellhub** (Gympass) and **TotalPass**, extended to dependents **Discount club** offering discounts across hundreds of companies **Hybrid work model** and flexible dress code (“Dress like yourself!”) **Alura** online learning platform **Wellness programs:** personal support, workplace gymnastics, birthday day off, free museum entry, quick massage, and more **Funeral assistance** for you and your pet **Recognitions** **Top Employer Brazil** (2020–2025) **Best Companies to Work For** (Financial Institutions, Information Technology, São Paulo, Women, Ethnic-Racial, LGBTI+) Awards reinforcing our commitment to diversity, inclusion, and excellence **Join us in building the future with B3!** We are much more than Brazil’s stock exchange. We are a global reference in financial market infrastructure, with over 100 years of history and direct impact on the country’s sustainable economic development. Here, you’ll find a plural, innovative, and collaborative environment where every person is the protagonist of their own journey. **Want to join a team that connects markets, advances careers, and transforms lives? Then this opportunity is for you!**