- Company: Sum Up
- Location: Berlin, Germany
- Salary: Pay not listed
Sum Up at a glance
sumup.com- Founded 2011
SEC filings mentioning "SumUp": 177 — search EDGAR
252 employees covered under a retirement plan (2024 filing) — via DOL Form 5500 / EFAST2
Registered as a global legal entity (LEI 984500CC08275B948278, US) — via GLEIF
SumUp is a British fintech firm founded in 2011 and headquartered in London. Its core products include EMV card readers plus online payments and bank-account tools for merchants (Wikipedia). Recent coverage highlights Europe consumer banking, Canada expansion, merchant investing with Upvest, and a consumer account that rewards shopping local.
2,703 Wikipedia views in June 2026 — a rough gauge of public visibility.
Senior Backend Engineer - Accounts at SumUp in Berlin, Germany (Full Time, No Remote)
Role Overview
In the Global Bank tribe, you'll contribute to building the infrastructure for digital business accounts that empower small merchants globally. Your role involves designing and implementing a unified global infrastructure from scratch, ensuring scalability, resilience, and compliance across regions. You will work on migrating existing systems to a modern, event-driven architecture using Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes.
Key Responsibilities
- Contribute to the design and implementation of a newly architected global accounts platform.
- Migrate existing systems to a modern, event-driven, decoupled architecture that enables scalability and resilience across regions.
- Master event-driven architecture by building a truly decoupled, resilient system using Kafka.
- Prioritize technical design quality and deep problem understanding in Extreme Programming practices involving small iterations and daily deliveries.
Skills & Qualifications
- Experience with Kotlin, Golang, Elixir, Java, AWS, Kafka, PostgreSQL, and Kubernetes.
- Proficiency in event-driven architecture and distributed systems design.
- Aptitude for problem-solving and a passion for delivering high-quality software solutions.
- Experience with observability tools like Prometheus, Grafana, and Honeycomb is a plus.
- Familiarity with AI-assisted development tools such as Cursor and GitHub Copilot.
More About SumUp
At SumUp, we're on a mission to become the most popular banking partner for small merchants globally. Our team practices Extreme Programming, focusing on technical design quality and deep problem understanding through small iterations and daily deliveries. Join us in creating an effortless, simple, and affordable experience for millions of merchants worldwide.
Apply Today
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You’ll finish your application on the employer’s website. We don’t ask for a resume on this page.
Explore Sum Up online
What people say about Sum Up
- Ask HN: How to deal with a hard to work with Start-up CEO?
- Living in Switzerland ruined me for America and its lousy work culture
- The 'No True Programmer' Fallacy
- Ask HN: What's the hardest problem you've ever solved?
Recent news
- SumUp expands into consumer banking across Europe - FinTech Global
- SumUp Launches in Canada, its 38th Market - Finovate
- SumUp Partners with Upvest to Launch In-app Investing, Enabling Merchants to Grow Their Cash with Money Market Funds - FF News
- SumUp launches consumer account paying users to shop small - Sifted
- Iowa Agronomists Share One Word to Sum Up June’s Impact on the Corn Crop - Successful Farming
Aggregated from public discussions and news; opinions are the authors’ own.
Working in Berlin, Deutschland
Weather right now in Berlin, Deutschland: checking… · Local time: · Air quality: · Daylight: · UV index: · Wind: · Pollen:
Berlin is Germany’s capital and largest city, with about 3.7 million residents—the highest city-limit population in the EU—and is also a federal state. The role is listed on-site (not remote) in Berlin.
🇩🇪 Relocation safety for Germany: Very Safe — via Warnely, CC BY 4.0
National unemployment rate in Germany: 3.7% — via World Bank
Wage growth in Germany (year over year): 3.4% — via Eurostat
GDP per capita in Germany: $60,496 — via World Bank
Consumer price inflation in Germany: 2.2% (annual) — via World Bank
Real GDP growth in Germany: 0.2% (annual) — via World Bank
Statutory minimum wage in Germany: €2,343/month — via Eurostat
Cost of living in Germany: 9.1% above the EU average — via Eurostat
Job vacancy rate in Germany: 2.8% — via Eurostat
Average hours worked per year in Germany: 1,332 — via OECD
Nearby green space: 10 parks within 1.5km — closest is Lustgarten. via OpenStreetMap
Nearest public transit: Staatsoper (bus stop, 55m). via OpenStreetMap
- Elevation 36m (118 ft)
About this role & career path
Senior backend work at a payments company typically means ownership of high-throughput services, production readiness, and mentoring—skills that transfer to other fintech and platform engineering paths.
Build the skills for this role
- freeCodeCamp — Full Stack curriculum (free)
- Saylor Academy — Computer Science courses (free)
- CS50 (Harvard, via edX) (free to learn)
- Microsoft Learn — developer training paths (free to learn)
Free & low-cost learning resources
- freeCodeCamp — Full Stack curriculum (free)
- Saylor Academy — Computer Science courses (free)
- CS50 (Harvard, via edX) (free to learn)
- Microsoft Learn — developer training paths (free to learn)
- System design for payment or ledger-style backends (idempotency, retries, consistency).
- API design, observability, and failure modes under load.
- Trade-offs when shipping merchant-facing features across many markets.
Strong fit if you want senior backend ownership in fintech payments at SumUp in Berlin, building merchant and banking infrastructure rather than pure consumer apps.
Job details above are provided by the employer/source. The sections on this page are compiled from public data sources with AI assistance.
Accommodations: if you need a workplace accommodation to apply for or perform this job, see ADA.gov or EEOC.gov for guidance on your rights and how to request one.
Listing facts
- Role Senior Backend Engineer
- Employer Sum Up
- Location Berlin, Germany
- Type Full Time
- Pay (from listing) Pay not listed
- Posted July 29, 2026
- Apply by August 28, 2026
- Country Germany
- Overview Full job description on this page (273 words)
Facts above come from this job record on Get A Job.AI — not copied from third-party review sites.
Public discussions & open sources
Attributed public threads and profiles — not employee reviews or star ratings.
- Hacker News — Ask HN: How to deal with a hard to work with Start-up CEO?
- Hacker News — Living in Switzerland ruined me for America and its lousy work culture
- Hacker News — The 'No True Programmer' Fallacy
- Hacker News — Ask HN: What's the hardest problem you've ever solved?
Cached public sources (Hacker News, Dev.to, GitHub, etc.).
Employer website
Explore related openings
4 other opening(s) at Sum Up on Get A Job.AI
- Senior Backend Engineer
- Senior Backend Engineer – Activation and Revenue
- Android Engineer – Engagement Mission
- Senior Product Analyst
Occupation family: Senior Backend Engineer
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