Senior Backend Engineer - Run & Grow
Level inferred from job title
Job description
Backend engineering role in SumUp's Run & Grow tribe, designing and operating production-grade backend services and event-driven systems that support merchant acquisition, identity, marketing technology, operations, risk, and compliance. The role is office-first in Berlin.
At a glance
- Employment
- Full-time
- Work mode
- On-site · Berlin, Germany
- Languages
- English
What you'll do
- Design, build, and operate production-grade backend services, APIs, and integrations, primarily using Go
- Build event-driven workflows and distributed systems using technologies such as Kafka and asynchronous processing
- Define clear service boundaries, data models, schemas, and API contracts that other teams can use confidently
- Build capabilities supporting merchant acquisition, identity, marketing technology, operations, risk, and compliance
- Own technical work end to end, from discovery and system design through implementation, testing, deployment, and production follow-up
- Modernise existing services and improve reliability through observability, security, failure handling, and incident response
- Collaborate with Product, Data, Operations, Compliance, Risk, Sales, Marketing, and other engineering teams to turn complex requirements into practical solutions
- Review code and designs, make pragmatic technical trade-offs, share knowledge, and mentor engineers around you
What we're looking for
- Strong backend engineering background in Go, or a typed-language generalist ready to ramp up quickly
- Have designed APIs and distributed systems with clear contracts, versioning, and integration patterns
- Fluent in relational and analytical databases (PostgreSQL, Snowflake) and comfortable making the right choice for the right use case
- Have built Kafka-based, event-driven systems and understand event sourcing and CDC patterns
- Experience in auditable, high-trust systems where every decision must be traceable — fintech, payments, or similar domains
- Experience with testing, observability, and incident response practices and treat them as first-class concerns
- Take ownership of ambiguous problems and turn them into clear, scalable, and maintainable solutions
- Communicate clearly, collaborate effectively, and explain technical concepts and trade-offs to different audiences
- Value pragmatic engineering, continuous improvement, mentoring, and reliable production operations
Your team
Run & Grow
Where SumUp builds the platforms and capabilities that help merchants discover, join, use, and continue growing with our products; brings together engineering, product, design, and revenue operations teams.
Benefits
Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office
Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches
- Hack Days every second Friday, and entire global Hack Weeks
- Commitment to Diversity and Inclusion
- A dedicated annual L&D budget of €2,000 for attending conferences and/or advancing your career through further education
- Enrolment onto our VSOP program
- A corporate pension scheme where we match up to 20% of your contributions
- 30 Days Sabbatical after completing 3 years of employment with SumUp
- Referral Bonus
Apply
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About SumUp
Be empowered to do more that matters.
SumUp is a financial partner for small businesses, providing tools to manage payments, finance and customer relationships. Over 4 million businesses in 36 markets rely on SumUp.
Mission
Empower small businesses across the globe by providing simple and affordable tools that allow them to thrive.
Key facts
- over 3,000 SumUppers
- Fintech
- Over 4 million businesses in 36 markets rely on SumUp
- Diverse team of over 3,000 SumUppers from over 90 nationalities
- Berlin office