Lumen Dynamics Senior Java Engineer

SUMMARY: We’re looking for an experienced Java Engineer to join a collaborative, agile engineering team working on Java / Spring Boot / Vue.js solutions. You’ll contribute across the stack, work closely with senior engineers and product stakeholders, and help continuously deliver secure, high-quality software that genuinely makes an impact. This is a hands-on role with strong ownership, technical depth, and real influence over design and engineering standards. WHAT WILL YOU BE DOING: You will be joining our engineering team and will be a valued member working closely in a collaborative, autonomous, cross-functional team. You will help with the following: Design, develop, and maintain backend services using Java Spring Boot, with exposure to Vue.js on the frontend Write and maintain a strong automated test suite (unit, integration, and end-to-end) Participate actively in code reviews, ensuring quality, performance, and maintainability Contribute to service and feature design discussions Debug and resolve complex issues in distributed systems Follow best practices around secure coding, CI/CD, source control, and release processes Coach and mentor junior engineers, raising the overall quality bar Provide predominantly 3rd-line support when required Collaborate with engineering leadership to continuously improve ways of working WHAT WE ARE LOOKING FOR: 5+ years of commercial experience with Java Spring Experience working alongside a modern frontend framework (Vue.js or similar) Strong understanding of RESTful APIs Solid experience with automated testing (unit integration) Hands-on experience with CI/CD pipelines (e.g. GitHub Actions, Drone, similar) Comfortable working in Agile environments with short delivery cycles Confident using Git and modern codebase management practices Strong focus on code quality, security, and performance Experience reviewing code and providing constructive feedback Strong problem-solving skills and a real ownership mentality Clear communicator with both technical and non-technical stakeholders Strong English communication skills, both written and verbal. AWESOME BUT NOT REQUIRED: Experience with large-scale, high-performance systems Exposure to microservices architectures Knowledge of cloud-native development Experience with Docker, Kubernetes, Helm, Kustomize Familiarity with event-driven/event-based architectures Leadership or mentoring experience WHAT’S IN IT FOR YOU? Be part of our collegial environment where responsibility and authority are shared equally amongst colleagues, and help create our company culture A culture in which we don’t criticise failure but ensure we learn from our mistakes An Agile environment where your ideas are welcome The possibility to grow and experience different projects Fully remote Ongoing Training Mentoring The possibility of travelling - ATTENTION! THIS POSITION IS FOR PORTUGAL OR BRAZIL-BASED ONLY