You'll join SumUp's Merchant Intelligence squad within the Engagement Mission — a newly formed team building foundational backend services that create a shared source of truth for product and merchant data across the business.
The team is focused on two core services
Product Catalogue Service — a global source of truth for all products SumUp sells across every market, including hardware, subscriptions, and software, as well as market-specific feature and settings configuration.
Merchant Intelligence Service — a centralized platform that aggregates merchant data from across the SumUp ecosystem, helping teams understand the full merchant journey through product adoption, hardware sales, health signals, support interactions, and marketing cohorts.
By building these services, the squad is solving a company-wide challenge: product and merchant data is currently fragmented across multiple systems and teams, creating duplication, inconsistency, and reliance on manual workarounds. The Merchant Intelligence squad is building the platform foundations that will help teams across SumUp move faster and make better decisions with reliable, centralized data.
As a Senior Backend Engineer, you'll help design and build these services from the ground up. You'll work closely with product, data, and engineering teams across SumUp to create scalable systems that are reliable, easy to integrate with, and valuable to a broad range of internal users.
What you'll do
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
You'll be great for this role if you have
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
Why you should join SumUp
🌍 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 day