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Strong fit if you want senior backend ownership on merchant growth and revenue systems at a scaling European fintech, on-site in Berlin. Thin public DATA on culture and comp—validate team, stack, and leveling in the process.
As Senior Backend Engineer – Activation and Revenue at SumUp, you would design and ship backend services that move merchants from signup to paid usage and keep revenue-critical payment flows reliable. Expect work around activation funnels, billing/revenue paths, and APIs that sit behind card readers and merchant products—collaborating with product and other engineers to measure conversion, reduce drop-off, and harden systems that process real money at scale.
Prioritize solid backend design, distributed systems, and payment-adjacent reliability (idempotency, observability, careful money handling). Pair that with product metrics for activation and revenue, plus API design for merchant-facing services.
The listing is for Berlin, Germany with remote set to no—plan on local presence unless SumUp states otherwise.
It typically means services and data paths that help merchants start using the product and that support monetization—funnels, billing hooks, and reliable payment-related backends rather than pure research or device firmware.
Wiki and news describe a merchant payments company (card readers, online payments/banking tools) expanding markets and consumer/merchant finance features; culture and salary details are not in this DATA set.
Website: sumup.com
SumUp is a British financial technology company headquartered in London. SumUp’s primary product is an EMV card reader and a number of online payment and bank account system for merchants and businesses.
Public cache only — not an employee review.
Senior Backend Engineer - Activation and Revenue at SumUp in Berlin, Germany (Full Time, No Remote) The Opportunity In the Global Bank tribe, you'll be instrumental in building the infrastructure for a digital business account that empowers merchants to manage their banking needs. Our mission is to become the leading banking partner for small merchants globally with an effortless and affordable experience. As part of the Bank Activation and Revenue team, your work will directly impact the conversion rate from SumUp's ecosystem users into active bank users. You'll own the critical journey from account opening until merchants fully integrate their business accounts into daily operations. What You'll Do Build Greenfield Services: Design and implement Banners, Rewards, and Feature Toggles to power global product experimentation. Drive Activation: Create the technical logic that tracks and incentivizes users through their first five meaningful transactions, ensuring a smooth path to becoming a long-term banking partner. Owning the Stack E2E: Follow our "build it, run it, own it" model. You will be responsible for the full lifecycle of your features, from architectural design to production monitoring. Participate in a culture of high-velocity engineering with daily deliveries. Who We're Looking For Strong experience as a backend engineer, preferably in the financial or SaaS industry. Proficiency in building scalable and efficient services using modern technologies like Python, Go, or Java. Experience with microservices architecture and cloud platforms such as AWS or GCP. Adept at designing and implementing complex systems that require high availability and performance. Passionate about solving challenging problems and delivering value to users through technical innovation. About the Company SumUp is a global payments company headquartered in Berlin, Germany. We offer innovative payment solutions for merchants of all sizes, enabling them to accept card payments both online and offline. Our mission is to make commerce easier by providing seamless financial services that help businesses grow. How to Apply To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.
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