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
EnglishJob 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.