Descripción de la oferta
Your Tasks
We’re looking for a Senior Full-Stack Developer to design and build modern web applications, process automations and an internal AI platform serving 55,000 employees. You will participate in architecture decisions, lead external and nearshore teams, and partner with stakeholders to ship secure, scalable products that boost enterprise productivity.
Responsibilities:
Design, build, and operate full-stack applications using Node.js, TypeScript, React, n8n, power platform
Develop robust APIs and microservices (Node.js/TypeScript, REST/GraphQL), including authentication/authorization, rate limiting, and observability
Partner in the evolution of our internal AI platform: integrate LLMs and vector search, build reusable AI services and deliver employee-facing AI tools.
Define reference architectures, coding standards, and reusable component libraries; champion performance, accessibility, and security by design
Own CI/CD and DevOps workflows (GitHub Actions/Azure DevOps, Docker, Kubernetes); automate testing and deployments; establish blue/green or canary releases
Coordinate and quality-assure external vendors and development partners; plan sprints, review deliverables, and ensure on-time, on-budget outcomes
Collaborate with product and business stakeholders to translate needs into clear technical roadmaps, user stories, and measurable outcomes
Enforce engineering excellence through code reviews, automated tests (unit/integration/e2e), and monitoring/alerting (OpenTelemetry/Prometheus/Grafana)
Apply secure engineering practices (OWASP, secrets management, least privilege), data privacy, and compliance requirements
Your Profile
6+ years of software engineering with a focus on full-stack web development
Advanced proficiency in Node.js, TypeScript, React, and modern front-end tooling.
Strong back-end skills: API design, microservices, relational and NoSQL databases, caching (Redis)
Hands‑on experience with cloud‑native delivery: containers (Docker), orchestration (Kubernetes), CI/CD, and infrastructure as code (Terraform or Pulumi)
Excellent communication, stakeholder management, and mentoring skills
Readiness to learn new technologies
Passion for new and upcoming tech trends
Preferred
Experience in RAD tools (powerplatform, n8n, K2 etc)
Experience building AI‑powered applications: integrating LLMs (OpenAI/Azure OpenAI, etc.), vector databases (Pinecone/pgvector/Elasticsearch), embeddings, and RAG patterns
Knowledge of identity and access management (OIDC/OAuth 2.0, SSO), API gateways, and zero‑trust patterns
Observability and reliability engineering (SLOs, error budgets, chaos testing)
Experience with performance optimization at scale (web vitals, SSR/SSG, CDN, edge runtimes)
Familiarity with Microsoft ecosystem and M365 (Entra ID/Azure) for integration in a large enterprise
About Us
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 has a total headcount of more than 60,000.
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 global deployment plan for the entire group.
Modern Workplace at MediaMarkt Saturn is seeking a skilled M365 Power Platform Developer to enhance our digital processes across offices and stores, improving the overall digital workplace experience for all employees.
Diversity and equal opportunities are important to us. Research shows that women and people from underrepresented groups are less likely to apply if they don’t meet all the criteria. If you are interested in this position but your experience doesn’t align perfectly with every requirement, we still encourage you to apply.
Additional Benefits
Young environment, where not everything is written in stone, and where you are expected to contribute and co‑create the culture of the Tech Hub and international collaboration model
You’ll have a 10% discount on the entire MediaMarkt website, so you can treat yourself at a lower price whenever you want!
On top of your compensation package, you can request Flexible Pay “MediaFlex program” (a.e. Ticket Restaurant, Private Health Insurance)
Flexible working time and possibility to combine home office / presential working. Intensive workday every Friday and during summer
The possibility to choose between 2 offices: The first one is the MediaMarkt Spain HQ with a very attractive menu at a price. You’ll eat for less than €4! And the second office is located at Pier01, in Barceloneta, right in the center of Barcelona. Free coffee and free fruit once a week
If you need a VISA, don’t worry, we’ll assist you with the visa process and accompany you throughout the entire process!
There is a training budget so you can continue developing the skills you need most to keep growing professionally and personally!
We offer language classes: English, Spanish, and German
On your birthday , you won't work! It’s a day for you to enjoy without thinking about work
You’ll be working with the most cutting‑edge technological stack of the moment
Job Details
Location: Barcelona, El Prat De LlobregatDepartment: HQ - ITType of Employment: Full TimeWorking Hours: 40
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