Senior Backend Engineer – Cloud, Microservices & Payments

MediaMarktSaturn Plattform Services GmbH; Barcelona; Hybrid; EUR 70,000 - 110,000; Full time

Benefits offered by this job

Young environment

MediaMarkt discount 10%

Training budget

Language classes

Office in Barcelona

Job summary

MediaMarktSaturn Plattform Services GmbH in Barcelona seeks a seasoned Backend Engineer with Kotlin expertise to build value-added features and guide architectural decisions for a cloud-enabled, microservices-based stack. You will own api design, database integration, and cloud-native deployment, while mentoring peers and driving DevOps practices.

The role emphasizes performance optimization, security, and monitoring using Grafana/Prometheus/Kibana, with flexible hybrid work options in a

Qualifications

• 5+ years of professional experience working with Kotlin
• Strong knowledge of backend technologies and frameworks like Node.js, Express.Nice to have: Quarkus / Spring boot
• Extensive experience in API design and know how to integrate microservices in a fault-tolerant and RESTful manner.
• 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

Responsibilities

• 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.

Skills

Kotlin

Node.js

Express

Quarkus

Spring Boot

API design

Microservices

SQL

PostgreSQL

MySQL

MongoDB

Git

Google Cloud

CI/CD

Stripe integration

PayPal integration

Java

GitOps

Kubernetes

Grafana

Prometheus

Kibana

Design patterns

Testing strategies

Security best practices

English communication

Tools

Terraform

Helm

Flux

Kubernetes

Job description

MediaMarktSaturn Plattform Services GmbH in Barcelona seeks a seasoned Backend Engineer with Kotlin expertise to build value-added features and guide architectural decisions for a cloud-enabled, microservices-based stack. You will own api design, database integration, and cloud-native deployment, while mentoring peers and driving DevOps practices.

The role emphasizes performance optimization, security, and monitoring using Grafana/Prometheus/Kibana, with flexible hybrid work options in a