Java Back-End Spark Developer

Founded in 2005 in Lisbon by three visionary entrepreneurs, MoOngy quickly became a leading group in Engineering and Information Technology (IT) across Europe and North Africa. Today, with a presence in 14 countries and more than 40 subsidiary companies, MoOngy employs over 9,500 talents who share a common passion for innovation and excellence. Position: Java Back-End Spark Developer Location: Lisbon Work Model: Hybrid – 2 days/week onsite Eligibility: Valid work permit for Portugal required Languages: English (B2 minimum). French is a strong plus (francophone profiles will be prioritized). About the Role You’ll be part of an IT team responsible for designing and developing a large-scale Data Processing application, executed in batch mode and powered by Spark. Expect a technical playground involving cloud-native architectures, containers, and high-performance data pipelines. Work Experience Required 8+ years of Java/J2EE development, ideally within data-processing environments. 3+ years of hands-on Apache Spark development. Solid experience building and deploying cloud-native applications using Docker and Kubernetes . Must-Have Skills Strong, hands-on experience with Apache Spark . Deep knowledge of modern Java features: lambdas, streams, futures . Solid understanding of solution design patterns and performance optimization. Java/J2EE 9, Spring , Spring MVC . Expertise in Transactional SQL and Spark SQL . Experience with relational databases: PostgreSQL , Oracle ExaCC . Familiarity with object storage (e.g., S3 ). Proficiency with containers and orchestration: Docker , Kubernetes . Hands-on experience with Maven , GitLab , ArgoCD , Liquibase . Key Responsibilities Design, build, and optimize Java/J2EE back-end components for large-scale data processing. Develop, maintain, and tune Apache Spark batch pipelines. Contribute to architecture and solution design, applying best practices and avoiding anti-patterns. Work with containerized workloads in Kubernetes/Docker environments. Implement and maintain CI/CD pipelines using modern tooling. Advantages of joining MoOngy: International Mobility: Access to a dedicated international mobility department with personalized relocation programs to facilitate your move to a new country. Career Development: Opportunities to work on projects with cutting-edge technologies in different countries and various sectors. Continuous Learning: Access to ongoing and free training and career-oriented certifications. Personal Growth: Exchange of ideas and best practices among professionals across Europe, fostering creativity and innovation in IT. Global Citizen in the World of Technology: Opportunity to work in a global network of companies, with access to a wide range of challenging projects in different European markets. @MoOngy Group we stand for equality and value diversity. We create a safe, diverse environment where opportunities are equal for everyone We do not discriminate based on age, ethnicity, sexual orientation, gender, disability, or any factor other than merit. All applications with skills needed for the position are welcome