SeniorBack-EndDeveloper

NEORIS is a Digital Accelerator that helps companies move into the future, leveraging 20 years of experience as Digital Partners to some of the world’s largest organizations. We have more than 4,000 professionals across 11 countries, with a multicultural startup culture where we foster innovation and continuous learning to create high-value solutions for our clients. oWe are looking for a Senior Back-End Developer with strong Java expertise to join our engineering team and play a key role in designing, building, and scaling our enterprise backend systems. You will architect and deliver high-performance APIs and data-intensive services that power our applications, working within a modern cloud-native stack built on GCP. You will work across multiple Java versions, with a strong preference for and expertise in Java 21 including modern language features such as Virtual Threads (Project Loom), Sequenced Collections, Record Patterns, and Pattern Matching. You will collaborate closely with front-end engineers, data engineers, and product teams to deliver robust, secure, and maintainable solutions in a fast-paced Agile environment. Core technologies: Java 7–21 · Spring Boot · PostgreSQL · GCP · OAuth2 · OpenAPI · Docker · SAP integrations · Google BigQuery Key Responsibilities Design, build, and maintain scalable, high-performance backend applications and APIs following RESTful principles and OpenAPI specification standards. Implement and manage secure authentication and authorization flows using OAuth2 and related protocols. Develop and optimize Spring Boot-based services and microservices, ensuring reliability, maintainability, and performance at scale. Work proficiently across multiple Java versions (8, 11, 17, 21), while advocating for incremental migration toward Java 21 and its modern capabilities. Write and optimize complex SQL queries and manage relational database schemas using PostgreSQL. Build and maintain GCP-based cloud solutions, leveraging GCP-native service