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)

Adaptable 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

📌 Fullstack Node.js Engineer (Barcelona)
🏢 Mediamarktsaturn
📍 Barcelona