OverviewJoin the Payment & Basket Platform team to strengthen core stack and developer experience.
You will help design high-performance, maintainable services while guiding cloud transition from on-premise.
Collaborate across cross-functional teams to implement automated solutions for recurring support, foster a healthy technical culture, and contribute to scalable, secure payment and data-driven features.
This role offers impact on mission-critical commerce platforms and opportunities to shape the architecture and DevOps practices.
Compensaciones / BeneficiosYoung environment with room to contribute
10% discount on MediaMarkt website
Flexible Pay program (health insurance, restaurant vouchers)
Versátil working hours and home office options
Office choices in Barcelona (HQ or Pier01)
Training budget and language classes
ResponsabilidadesDevelop value-adding features for customers on the core stack
Apply Clean Code principles and DevOps ownership for services from requirements to operation
Make architectural decisions to ensure performance, robustness, and cloud migration readiness




Share knowledge and mentor team members to foster growth
Analyze recurring support requests and implement automated code-based solutions
Promote open, constructive team discussions and continuous improvement
Requisitos principales5+ years of professional Kotlin experience
Strong backend knowledge with Node.js/Express or Spring Boot
Experience in API design and integrating microservices in RESTful, fault-tolerant ways
Experience with SQL (PostgreSQL/MySQL) and NoSQL (MongoDB) databases
Git proficiency
Cloud platform experience, preferably Google Cloud
CI/CD pipelines experience
Understanding of payment gateways (Stripe, PayPal)
Knowledge of microservices architecture and testing strategies
Familiarity with security best practices for web apps
Ability to adapt to rapid technology changes
Excellent English communication skills
knowledge sharing and mentorship
open, constructive communication
cross-functional collaboration
Kotlin
Java
Node.js/Express

📌 Experienced Fullstack Engineer - Payment & Basket (M/F/D) - Barcelona
🏢 Mediamarktsaturn
📍 Barcelona