2 months ago
Berlin, GermanySenior
Responsibilities
- Design, build, and operate scalable backend services, APIs, event-driven workflows, and system integrations.
- Build reusable capabilities for merchant onboarding, identity verification, and KYC/KYB regulatory data collection.
- Improve reliability and resilience through observability, failure handling, incident response, and long-term risk reduction.
- Develop primarily in Go while maintaining and modernizing Java services.
- Evolve domain models and service boundaries while reducing legacy complexity, duplicated logic, and tightly coupled integrations.
- Own work end-to-end from technical design and implementation through rollout and production follow-up.
- Translate ambiguous product and regulatory requirements into scalable technical solutions across team and domain boundaries.
- Review code and designs, mentor engineers, and raise engineering standards.
Requirements
- Strong professional experience building and operating production backend systems with high business impact.
- Professional experience with Go and Java, including maintaining and evolving Java services.
- Strong knowledge of API design, distributed systems, asynchronous processing, data modelling, testing, and system design.
- Experience with event streaming platforms such as Kafka and observability tools such as Grafana or Honeycomb.
- Experience deploying and operating services in cloud environments such as AWS, ideally using Docker and Kubernetes.
- Experience improving the reliability of business-critical systems and converting recurring incidents into lasting improvements.
- Ability to own complex problems from definition through production.
- Strong communication and collaboration skills across Engineering, Product, Compliance, Risk, and Operations.
- Experience in fintech, payments, KYC/KYB, identity verification, or regulatory systems is a plus.
- Experience translating regulatory and compliance requirements into scalable engineering solutions is a plus.
Benefits
- Office-first setup from SumUp’s Berlin office.
- Global collaboration on large-scale fintech products used by millions of businesses.
- Hack Days every second Friday and global Hack Weeks.
- Annual learning and development budget for conferences or further education.
- Enrollment in the VSOP program.
- Corporate pension scheme with employer contribution matching.
- 30-day sabbatical after three years of employment.
- Referral bonus, Urban Sports Club subsidy, Kita placement assistance, relocation assistance, and subsidized office lunches.
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.