Mid–Senior Level | Engineering – Integrations & Product About the Role We're looking for a mid-to-senior fullstack developer to help build and evolve this platform end to end — from the Java/Spring backend services to the React-based frontend — while working closely with the teams responsible for third-party integrations, platform infrastructure, and the wider product. What You'll Do * Design, build, and maintain features across the platform's stack, spanning multiple regional environments * Develop backend services in Java 17 with Maven, and frontend components in React with Yarn * Work with PostgreSQL and MongoDB (Atlas Database) to model, query, and optimise account and document data * Integrate with regional identity providers (Keycloak) for authentication, and with internal data and document-archive services for account and document data * Contribute to the work needed for integration with a third-party back-office platform, including required user-management functionality, and support both pull and push data flows * Write clean, tested, well-documented code,



and take part actively in code reviews * Collaborate with Product, QA, and DevOps within an agile setup — sprint planning, refinement, and retros * Help troubleshoot issues across the stack, including occasional 2nd-line support and root-cause analysis * Contribute to CI/CD pipelines and deployments on AWS Help keep the portal scalable, modular, and brandable as new clients and integrations come on board What We're Looking For * 4–7 years of professional experience as a fullstack developer * Hands-on backend experience with Java 17 and Maven * Hands-on frontend experience with React and Yarn * Practical experience with both a relational database (PostgreSQL) and a document database (MongoDB) * Comfortable working across the stack and owning a feature from API to UI * Good communication skills and comfort working with distributed, cross-functional teams * A pragmatic, quality-conscious approach to code, tes

📌 Full Stack Engineer (Madrid)
🏢 Socium - Teams Done Differently
📍 Madrid