Job Summary: We are looking for a Senior Java Developer to collaborate with cross-functional teams, focused on building high-performance, low-latency services and identifying and mapping transitional architectures. Key Highlights: 1. Dynamic and challenging environment with opportunities for technological interaction 2. Autonomy and clear goals for professionals 3. Growth in a welcoming and opportunity-rich environment **What We Are Looking For?** **Senior Java Developer** **Main Responsibilities:** * Collaborate closely with cross-functional teams to gather requirements and translate them into technical specifications. * Ability to identify and map applications, dependencies, and purposes within transitional architectures (lift-and-shift / replatform / refactor). * Build high-performance, low-latency services. **Requirements:** * 8+ years of experience with Java or GO * 3+ years of experience with AWS or similar technologies. * 3+ years of experience with CI/CD pipelines and DevOps practices. * In-depth knowledge of microservice design, hexagonal architecture, reactive architecture, Clean Architecture / Vertical Slice. * Experience with messaging via TCP Sockets and Message Brokers (Kafka or RabbitMQ). * Design Patterns (Strategy, Abstract Factory, Chain of Responsibility). * Cloud Native Patterns (CQRS, Retry Pattern, Circuit Breaker). * Software quality (contract testing, load testing, unit testing). * Traceability tools (Splunk, AWS CloudWatch). * Observability tools (Dynatrace, Distributed Tracing – Jaeger / Zipkin, Grafana). * Hands-on experience with Kubernetes (deploys, HPA/VPA). * Hands-on experience with Docker containerization **Preferred Qualifications:** * Card network protocols – ISO 8583. * Security standards (PCI DSS, HSM, Tokenization). * English/Spanish: Advanced **Work Location: São Paulo/SP – or remote, limited to 150 km from the capital** **Why Build Your Career at Meta?** We offer autonomy, clear goals, and a dynamic and challenging environment where professionals have the opportunity to interact with diverse technologies, participate in all types of projects, bring new ideas, and work from anywhere in Brazil—and why not, the world. Additionally, we are one of the best companies to work for in Brazil according to Great Place to Work and among the top 10 fastest-growing companies in the country for three consecutive years, per the Informática Hoje Yearbook. **What Are Our Values?** * We are people serving people * We think and act like owners * We are driven by performance * We grow and learn together * We pursue excellence and simplicity * Innovation and creativity are in our DNA All individuals are welcome, regardless of background, disability, ethnicity, religious belief, sexual orientation, appearance, age, or related factors. We want you to grow with us in a welcoming and opportunity-rich environment. Do you identify with this? Then, #JoinMeta!