Senior Backend Engineer - MarTech

The MarTech team builds the marketing and growth systems that help SumUp reach more merchants around the world. You will join a diverse and distributed team that works closely with stakeholders across Acquisition Engineering squads, Online Marketing, Content & Localization, Engagement and Platform Infrastructure, working on meaningful problems with multiple technical dependencies and a visible impact on SumUp's acquisition strategy.

What you'll do

• Design, build and operate reliable backend services that support marketing and growth initiatives.
• Own features and engineering projects from discovery and technical design through delivery and production support.
• Build integrations with internal and external platforms, ensuring reliable data flows and maintainable interfaces.
• Define and evolve architectures for distributed services and event-driven systems.
• Improve the reliability, quality and operational excellence of existing services.
• Collaborate with technical and non-technical stakeholders to clarify requirements, communicate trade-offs and shape priorities.
• Support the growth of the team by pairing with peers, sharing knowledge and mentoring less experienced engineers.

What you'll need

• 5+ years of professional backend engineering experience. Strong experience with Go and the wider Go ecosystem.
• Hands-on experience with distributed systems, microservices and event-driven architectures.
• Experience with event-streaming platforms and messaging brokers such as Kafka.
• Practical experience with DevOps practices and CI/CD tools, for example GitHub Actions or Argo CD.
• A strong understanding of software architecture, service boundaries, APIs, data flows, testing and production operations.
• Excellent written and verbal communication skills, with the ability to explain technical concepts and trade-offs to both technical and non-technical stakeholders.

Nice to have

• Experience in marketing technology, growth, acquisition or advertising platforms.
• Familiarity with React, TypeScript, or Python.
• Experience in fintech or a related industry.

What they offer

• Annual L&D budget of €2,000 for conferences and further education.
• Equity ownership through VSOP program.
• Corporate pension scheme with up to 20% matching.
• 30 days sabbatical after 3 years of employment.
• Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches.