Summary: Join Capgemini Engineering as a Java Backend Developer to migrate monolithic applications, design event-driven architectures, and build real-time features using cutting-edge technologies. Highlights: 1. Migrating monolithic applications to microservices 2. Designing event-driven architectures with Kafka and Spring WebFlux 3. Engage in exciting national and international projects VNG \- Cais de Gaia, Lisboa \- Expo Java Backend Developer Java Backend Developer At Capgemini Engineering, the world leader in engineering services, we bring together a global team of engineers, scientists, and architects to help the world’s most innovative companies unleash their potential. From autonomous cars to life\-saving robots, our digital and software technology experts think outside the box as they provide unique R\&D and engineering services across all industries. Join us for a career full of opportunities. Where you can make a difference. Where no two days are the same. YOUR ROLE* Migrating monolithic applications to microservices * Designing event\-driven architectures * Working with Kafka (professional or academic experience) * Developing reactive applications with Spring WebFlux * Building real\-time features with WebSockets * Leveraging AWS services for scalable cloud solutions * Implementing advanced security configurations with Spring Security YOUR PROFILE* Minimum 3 years of experience with Java (preferably Java 11\+) * Hands\-on experience with Spring Boot, mainly Spring MVC * Experience with Oracle databases and at least one NoSQL database (e.g., MongoDB) * Familiarity with messaging systems like AWS SQS/SNS or similar * Knowledge of unit testing using JUnit and Mockito * Exposure to observability tools (e.g., Datadog, Grafana) * Basic knowledge of Spring Security * Experience with CI/CD pipelines (e.g., Jenkins) What You’ll Love About Working Here* Join a multicultural and inclusive team environment. * Enjoy a supportive atmosphere promoting work life balance. * Hybrid work. * Your career growth is central to our mission. Our array of career growth programs and diverse professionals are crafted to support you in exploring a world of opportunities. * Access valuable training and certifications in cutting edge technologies. * Engage in exciting national and international projects. * Health and life insurance. * Referral program with bonuses for talent recommendations. * Great office locations. About Capgemini Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you’d like, where you’ll be supported and inspired by a collaborative community of colleagues around the world, and where you’ll be able to reimagine what’s possible. Join us and help the world’s leading organizations unlock the value of technology and build a more sustainable, more inclusive world. Ref. code 388864\-en\_US Posted on 07 Jan 2026 Experience level Experienced Professionals Contract type Permanent Location VNG \- Cais de Gaia, Lisboa \- Expo Business unit Engineering and RandD Services Brand Capgemini Engineering Professional communities Software Engineering