Backend engineer for payment systems

MediaMarktSaturn Technology is working to make Europe’s number-one consumer electronics retailer thetechnology leader in its industry. To this end, several hundred developers, UX designers and system architectsusing 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 13 countries.

• Develop value-adding features for our customers and leverage your technical expertise to create the best possible solutions following the Clean Code principles.
• Embrace DevOps, taking responsibility for your team’s services from requirement analysis to operation.
• Make architectural decisions with your team to ensure high performance, robustness, and maintainability of the application, especially during the transition from on-premise to the cloud.
• Share your knowledge with your team colleagues, assist them, and contribute to the growth of the entire team.
• Understand recurring support requests and implement automated solutions in the code.
• Foster an open, honest, and constructive discussion culture within the team through your confident yet reflective manner.

• 5+ years of professional experience working with Kotlin
• Strong knowledge of backend technologies and frameworks like Node.js, Express.
• You have extensive experience in API design and know how to integrate microservices in a fault-tolerant and RESTful manner.
• You have experience working with SQL (PostgreSQL, MySQL) and NoSQL (MongoDB) databases.
• Knowledge of version control systems like Git.
• Proficiency in cloud platforms, preferrably Google Cloud
• Experience with continuous integration and continuous deployment (CI/CD) pipelines.
• Understanding of payment gateways and integration (e.g., Stripe, PayPal).
• Familiarity with performance optimization techniques for web applications.
• In addition to solid knowledge of object-oriented programming languages (preferably Java), you have practical experience with GitOps (Terraform, Helm, Flux) and Kubernetes.
• You are familiar with operating a business-critical service and know how to monitor it using tools like Grafana, Prometheus, and Kibana.
• Understanding of microservices architecture and implementation.
• You are knowledgeable about common design patterns and testing strategies, and you do not see quality and speed as contradictory.
• Knowledge of security best practices for web applications.
• Ability to adapt to rapidly changing technologies and methodologies.
• Excellent English language skills, both written and spoken
• Будет плюсом: Nice to have: Quarkus / Spring boot

• 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 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 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