Tech Lead Java Engineer based in Campinas - SP (hybrid). Role requires strong Java (Java 17+), Spring/Spring Boot, Hibernate/JPA, SQL and NoSQL (MySQL, MongoDB) skills, experience with Docker and AWS (EC2, EKS, Lambda, Step Functions, Cognito, API Gateway, SQS, RDS, VPC), and proven technical leadership in building microservices and distributed, highly available systems. Responsibilities include system design, full SDLC ownership, mentoring, code reviews, documentation, and adoption of GenAI/AI-assisted development practices.