Full Stack Engineer

Socium - Teams Done Differently; Madrid; Presencial; EUR 50.000 - 75.000; Jornada completa

Descripción de la vacante

Socium - Teams Done Differently is seeking a mid-to-senior fullstack developer to build and evolve our platform end to end, from the Java/Spring backend services to the React-based frontend, while collaborating with teams responsible for third-party integrations, platform infrastructure, and product.

You will design features across the stack, implement Java 17 backend with Maven and React frontend with Yarn, and work with PostgreSQL and MongoDB Atlas.

Formación

• 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.
• Experience with PostgreSQL and MongoDB databases.
• Experience integrating with identity providers (Keycloak).
• Experience with AWS and CI/CD pipelines.

Responsabilidades

• Design, build, and maintain features across the platform stack.
• Develop backend services in Java 17 (Maven) and frontend components in React (Yarn).
• Work with PostgreSQL and MongoDB to model, query, and optimise data.
• Integrate with Keycloak for authentication and with back-office services.
• Contribute to integration with third-party back-office platforms and data flows.
• Write clean, tested, well-documented code and participate in code reviews.
• Collaborate with Product, QA, and DevOps in an agile setup.
• Help troubleshoot issues across the stack and provide 2nd-line support when needed.
• Contribute to CI/CD pipelines and deployments on AWS.
• Keep the portal scalable, modular, and brandable for new clients.

Conocimientos

Fullstack development

Frontend development

Backend development

Communication

Herramientas

Java 17

Maven

React

Yarn

PostgreSQL

MongoDB

Keycloak

AWS

CI/CD

Descripción del empleo

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, testing, and documentation

Nice to Have

• Experience with AWS (ECS, Secrets Manager, VPN/networking basics)
• Familiarity with SSO/OIDC and Keycloak
• Exposure to B2B SaaS platforms, client portals, or back-office integration domains