Senior Backend Engineer - Golang

Join SumUp as a Senior Backend Engineer to design and build scalable backend services for fintech products. Enjoy a full-time role with a salary range of $90,000 – $135,000 USD, and numerous benefits including a corporate pension scheme and a dedicated L&D budget. SumUp is a fintech company that provides large-scale products used by millions of businesses worldwide. The role is based in Berlin, with an office-first setup.

• •Design, build, and evolve foundational backend services that create a shared source of truth for product and merchant data across SumUp, with a strong focus on scalability, reliability, and ease of adoption by internal teams.
• •Develop and maintain robust APIs, data models, and integration patterns that enable teams across the business to access consistent and trustworthy product and merchant information.
• •Build and improve data ingestion, aggregation, and event-processing pipelines that bring together signals from across the SumUp ecosystem into actionable merchant intelligence.
• •Contribute to shaping the long-term architecture and strategy for the Product Catalogue and Merchant Intelligence services, helping establish platform capabilities that can be used across multiple systems and teams.
• •Write high-quality, maintainable backend code following engineering best practices for testing, observability, and production readiness.
• •Collaborate closely with product managers, data teams, and engineers across SumUp to identify needs, solve complex data challenges, and turn them into effective technical solutions.
• •Work across squad and domain boundaries to support integrations, improve data consistency, and enable better internal tools, workflows, and merchant experiences.
• •Help define engineering standards, technical direction, and ways of working in a newly established squad operating in a complex and evolving domain.

• •🌍 Opportunity to work with SumUppers globally on large-scale fintech products used by millions of businesses worldwide, from our Berlin office. This involves an office-first setup.
• •🧑‍🔬 We take learning and experimentation seriously with Hack Days every second Friday, and entire global Hack Weeks.
• •🌈 Commitment to Diversity and Inclusion: Be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone's perspectives are respected and embraced.
• •📚 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: You will own a stake in SumUp’s future success.
• •💶 A corporate pension scheme where we match up to 20% of your contributions.
• •🔄 30 Days Sabbatical: Enjoy the unique opportunity to take a well-deserved break with our 30 days sabbatical benefit after completing 3 years of employment with SumUp.
• •🔗 Referral Bonus: Earn additional rewards by referring talented individuals to join the SumUp team.
• •🚵🏾‍♂️ Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, relocation assistance, subsidised office lunches.

• •Strong professional experience in backend engineering, building and operating reliable production systems.
• •Solid experience with Golang and designing scalable backend services.
• •Strong knowledge of API design, system design, and data modeling.
• •Hands-on experience with Postgres or similar relational databases.
• •Experience with AWS, Docker, Kubernetes, and infrastructure-as-code tools such as Terraform.
• •Familiarity with event-driven architectures and message brokers such as RabbitMQ or Kafka.
• •A strong ownership mindset, with the ability to work independently and navigate ambiguity.
• •Clear communication skills and a collaborative approach to working across product, data, and engineering teams.