Experienced Fullstack Engineer - Store Apps Platform (m/f/d)

MediaMarktSaturn Plattform Services GmbH; Barcelona; Híbrido; EUR 65.000 - 90.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

Young environment

10% discount on MediaMarkt website

Flexible Pay program

Flexible working

Two Barcelona offices

Descripción de la vacante

MediaMarktSaturn Technology in Barcelona seeks an experienced Fullstack Engineer to join the Technology Hub. You’ll own front and back features with TS/Node.js, React, GraphQL, and MongoDB, building scalable backend orchestration and shared infrastructure across product teams.

You’ll work with GCP and Terraform, improve CI/CD with GitHub Actions, and help teams move fast while keeping reliability. A collaborative culture and international collaboration await.

Formación

• Solid fullstack experience with TypeScript and Node.js, shipping and maintaining production services.
• Frontend capability in React, building interfaces without a dedicated frontend team.
• Strong grasp of GraphQL for API design and data querying; Apollo is a plus.
• Hands-on experience with MongoDB: schema design, indexing, and queries at scale.
• Comfortable with GCP services and Terraform for infrastructure-as-code.
• Experience with CI/CD tooling, particularly GitHub Actions.
• Familiarity with event-driven architectures (Pub/Sub or similar).
• Observes observability with Grafana and a strong testing discipline.
• Excellent communication and collaborative mindset across teams.

Responsabilidades

• Serve as a platform proxy for product teams and unblock cross-team concerns.
• Contribute to the backend orchestration service and ensure reliability and documentation as usage scales.
• Build and maintain shared projects including back office across frontend and backend layers.
• Manage and improve cloud infrastructure on GCP: provisioning and configuration.
• Improve CI/CD pipelines (GitHub Actions) for fast, stable delivery.
• Strengthen observability with monitoring, alerting, and dashboards (Grafana).
• Write clean, well-tested code and promote quality and reliability.
• Support and mentor engineers across product teams on platform practices.

Conocimientos

TypeScript

Node.js

React

GraphQL

MongoDB

GCP

Terraform

GitHub Actions

Pub/Sub

Grafana

Testing

Communication

Herramientas

MongoDB

GraphQL

Apollo

Terraform

GCP

GitHub Actions

Descripción del empleo

Your Tasks

We're looking for an experienced Fullstack Engineer to join our Platform team; a small, high-impact team that boosts the effectiveness of three teams building our store experiences. 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.

Your Tasks

• Serve as a platform proxy for product teams: understanding their needs, unblocking them on shared concerns, and coordinating cross-team technical decisions.
• 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.
• Support and mentor engineers across product teams, sharing knowledge on platform practices, infrastructure, and architectural patterns.

Your Profile

• Solid fullstack experience with TypeScript and Node.js. You've shipped and maintained production services and are comfortable owning them end-to-end.
• Frontend capability in React. You can build and maintain interfaces without needing a dedicated frontend team to carry you. ReactNative experience is a plus.
• 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.
• Familiarity with event-driven architectures using Google Pub/Sub or similar systems; you understand the trade-offs between synchronous and asynchronous patterns.
• 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; you think about failure modes and edge cases from the start.
• Strong communication skills and a collaborative mindset: you can work across team boundaries, synthesise input from multiple stakeholders, and make pragmatic decisions.

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.

(*) 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 with SegurCaixa Adeslas, ...)
• 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 Iberia 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
• There is a training budgetso 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 Infos

Location:Barcelona, El Prat De Llobregat

Media Markt Saturn Th Services Barcelona

Department:HQ - IT

Entrylevel:Professional Level

Type of Employement:Full Time

Working Hours:40

Persona:Job Requisition Tech Employee