We're looking for an experienced Fullstack Engineer to join our Platform team; You'll be embedded in the centre of how we build and run software: owning shared infrastructure, shaping our backend orchestration service, and helping different teams move faster without sacrificing quality or reliability. Contribute to our backend orchestration service used across all products: reviewing contributions, improving its design, and ensuring it remains reliable and well-documented as usage scales. Build and maintain shared projects such as the back office, taking ownership of both frontend and backend layers.

Manage and improve our cloud infrastructure on GCP: provisioning, configuring, and maintaining environments used across product teams. Improve and extend our CI/CD pipelines (GitHub Actions), ensuring fast, stable, and repeatable delivery across all teams.

Strengthen our observability: setting up and refining monitoring, alerting, and dashboards with Grafana to give teams clear visibility into production health. Write clean, well-tested code and contribute to a culture where quality and reliability are default. Solid fullstack experience with TypeScript and Node.js. Frontend capability in React. You can build and maintain interfaces without needing a dedicated frontend team to carry you. Strong grasp of GraphQL for API design and data querying;

experience with Apollo is a plus. Hands-on experience with MongoDB: schema design, indexing strategies, and query optimisation at scale. Comfortable with GCP services and Terraform for infrastructure-as-code; you understand how cloud environments are structured and managed.

Experience with CI/CD tooling, particularly GitHub Actions: you can build and maintain pipelines that teams actually trust.

Experience with Grafana (or equivalent):



you think about observability as part of building, not as an afterthought. A solid testing discipline covering unit, integration, and end-to-end scenarios; MediaMarktSaturn is Europe's leading consumer electronics retailer. It sees itself as a partner, daily companion and navigator for its customers in the digital world.

Its over 1,000 MediaMarkt and Saturn stores are closely integrated with their online shops. MediaMarktSaturn Technology is working on making Europe's number one consumer electronics retailer the technology leader in its sector. To this end, several hundred developers, UX designers and system architects using state-of-the-art technology work hand in hand with business owners in agile teams to develop customer-focused technology solutions for more than 6 million customers every day in 11 countries.

Technology

Hub located in Barcelona , is one of the service units of MediaMarktSaturn Technology to deliver adequate staffing and engineering skills for the agreed deliveries of the general deployment plan for the entire group. (*) Research shows that women and people from underrepresented groups are less likely to apply if they don't meet all the criteria.

Ticket

Restaurant, Private Health Insurance with SegurCaixa Adeslas , ...) Flexible working time and possibility to combine home office / presential working. Intensive workday every Friday and during summer And the second office is located at Pier01, in Barceloneta , right in the center of Barcelona. Free coffee and free fruit once a week There is a training budget so you can continue developing the skills you need most to keep growing professionally and personally!

English, Spanish, and German It's a day for you to enjoy without thinking about work Department: HQ - IT Entrylevel: Type of Employement: Full Time Persona: Job Requisition Tech Employee

📌 Experienced Fullstack Engineer - Store Apps Platform (m/f/d) (Barcelona)
🏢 Mediamarktsaturn Plattform Services
📍 Barcelona