14 days ago
Cologne, GermanySenior
Responsibilities
- Design, build, and operate production-grade backend services, APIs, and integrations primarily using Go.
- Build Kafka-based event-driven workflows and distributed systems with asynchronous processing.
- Define service boundaries, data models, schemas, and API contracts for use by other teams.
- Develop capabilities for merchant acquisition, identity, marketing technology, operations, risk, and compliance.
- Own technical work from discovery and system design through implementation, testing, deployment, and production follow-up.
- Modernize existing services and improve reliability through observability, security, failure handling, and incident response.
- Collaborate with Product, Data, Operations, Compliance, Risk, Sales, Marketing, and engineering teams.
- Review code and designs, make technical trade-offs, share knowledge, and mentor engineers.
Requirements
- Strong backend engineering experience in Go, or experience as a typed-language generalist able to ramp up quickly.
- Experience designing APIs and distributed systems with clear contracts, versioning, and integration patterns.
- Fluency with relational and analytical databases including PostgreSQL and Snowflake.
- Experience building Kafka-based event-driven systems and understanding event sourcing and CDC patterns.
- Experience with auditable, high-trust systems such as fintech or payments platforms.
- Experience with testing, observability, and incident response practices.
- Ability to own ambiguous problems and deliver clear, scalable, maintainable solutions.
- Clear communication, effective collaboration, and ability to explain technical concepts and trade-offs to varied audiences.
- Commitment to pragmatic engineering, continuous improvement, mentoring, and reliable production operations.
Benefits
- Berlin-based office-first work setup with collaboration across global teams.
- Annual L&D budget of €2,000 for conferences or further education.
- Enrollment in SumUp’s VSOP program.
- Corporate pension scheme matching up to 20% of employee contributions.
- 30-day sabbatical after completing three years of employment.
- Referral bonus.
- Urban Sports Club subsidy, Kita placement assistance, relocation assistance, and subsidized office lunches.
- Inclusive workplace commitment and opportunities for global collaboration, learning, Hack Days, and Hack Weeks.
Tech Stack
Categories
About SumUp
SumUp builds card readers, point-of-sale apps, and payment tools for small businesses, along with accounts, invoicing, and online checkout. It sells hardware and earns fees on payment processing and subscriptions for software and services such as invoicing and loyalty. Founded in 2012 and headquartered in London, the company serves more than 4 million merchants across 30+ markets, and offers options like payment links and Tap to Pay.