Software Development Engineer in Test - Quality Infrastructure

SumUp
Berlin, Germany
2 days ago

Role details

Contract type
Permanent contract
Employment type
Full-time (> 32 hours)
Working hours
Regular working hours
Languages
English

Job location

Berlin, Germany

Tech stack

Java
Amazon Web Services (AWS)
Continuous Integration
Python
PostgreSQL
Load Testing
Open Source Technology
Performance Testing
Kotlin
Kubernetes
Performance Monitor
Kafka
Docker
SDET
Go
Microservices

Job description

  • Build performance monitoring and regression-detection platforms
  • Create reusable data-generation systems and merchant/transaction factories
  • Develop shadow-traffic and automated validation infrastructure
  • Implement foundations for deterministic, automation-gated deployments

Developer Productivity & Tooling

  • Improve CI/CD reliability, speed, and observability
  • Build internal SDKs, CLIs, and automation frameworks
  • Drive adoption of contract testing and integration-first patterns
  • Create workflows that turn production incidents into automated coverage

Architecture & Systems

  • Modernize automation architecture and integration patterns
  • Design tooling that reduces deployment lead time and boosts confidence
  • Embed with squads to understand pain points and ship high-leverage solutions

What Success Looks Like:

  • 60%+ reduction in manual validation
  • Faster lead time across all squads
  • 70%+ integration coverage with better tooling
  • Fully automated Dev/Staging deployments for all teams

What You Bring:

Engineering Excellence

  • Experience in Kotlin, Go, Python, Java, or similar
  • Built internal tools, SDKs, or frameworks used by other engineers
  • Deep understanding of microservices, event-driven systems, and CI/CD
  • Hands-on with Docker, Kubernetes, AWS, and modern observability stacks

Requirements

Do you have experience in SDKs?, * Improved CI/CD or DevEx tooling at scale

  • Experience with performance testing, distributed tracing, load testing
  • Designed integration/testing frameworks or developer automation

Mindset

  • You optimize for leverage, not ticket throughput
  • You care deeply about developer happiness and productivity
  • You collaborate, embed with teams, and take ownership
  • You thrive in autonomy and low-bureaucracy environments

Nice to Have:Experience with Kafka, Pact, fintech environments, PostgreSQL, developer portals, or open-source tooling.

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