Zup InnovationSenior Java Software Engineer
Apr. 2024 - Feb. 2026São Paulo, BrasilDesigned and maintained microservices using Java 17 and 21, supporting ~12–18 million API requests/day with 99.95% uptime. Reduced average API latency from ~420ms to ~190ms (≈55%) by introducing async processing, connection pooling, and caching strategies. Implemented Kafka, SQS, and SNS pipelines processing 8k–12k TPS during peak financial operations. Deployed cloud infrastructure on AWS ECS Fargate and EC2, reducing infrastructure costs by ≈28% through right‑sizing and autoscaling policies. Automated infrastructure provisioning with Terraform, decreasing environment setup time from 2 days to 45 minutes. Improved deployment frequency from bi‑weekly to multiple releases per day using CI/CD pipelines. Implemented observability dashboards, reducing production incident detection time by ≈60%. Integrated OAuth2 and SSO, securing 100% of Open Finance endpoints under regulatory compliance. Technologies: Java 17/21, Spring Boot, Liferay, AWS, Kafka, SQS, SNS, Docker, Terraform, PostgreSQL, Oracle, MySQL, OAuth2, Datadog, Kubernetes