SumUp builds simple, affordable financial tools that help small businesses get paid, manage their money, and grow. Beyond payments, we offer a number of financial products - including business banking, card products, lending, and invoicing - giving merchants everything they need to manage their payments and finances in one place. The Cards squad is a core part of that, owning the systems that power card issuing, lifecycle management, and transaction processing for merchants across Europe.

<p data-pm-slice="1 1 []">SumUp builds simple, affordable financial tools that help small businesses get paid, manage their money, and grow. Beyond payments, we offer a number of financial products - including business banking, card products, lending, and invoicing - giving merchants everything they need to manage their payments and finances in one place.<br><br>The <strong>Cards squad </strong>is a core part of that, owning the systems that power card issuing, lifecycle management, and transaction processing for merchants across Europe. We handle millions of card transactions every day, and we&#39;re now scaling those systems to support new product capabilities while laying the foundations for a more global, resilient platform. That&#39;s why we&#39;re growing the team and looking for a seasoned backend engineer who can take real ownership of complex, high-impact work. If you want to build systems that genuinely matter to small businesses and you&#39;re excited by the technical depth that comes with high-throughput, distributed architecture, this is the role for you.</p>
<p data-pm-slice="1 1 []">🎥 Get a feel for our Berlin office <a class="text-primary underline cursor-pointer" href="https://www.youtube.com/watch?v=9DG64C3moeQ" target="_blank">here</a>.</p>
<h3 data-pm-slice="1 3 []">What you&#39;ll do</h3>
<ul>
<li>Own the end-to-end delivery of backend services within the Cards EU domain, including observability, testing, and production support</li>
<li>Contribute to the technical roadmap by participating in architectural discussions and proposing solutions for complex, distributed systems challenges</li>
<li>Raise well-scoped pull requests, conduct thorough code reviews, and help maintain high standards of code quality and test coverage across the team</li>
<li>Collaborate closely with engineers in adjacent squads and with the product manager to shape and refine the squad backlog</li>
<li>Participate in incident reviews and the on-call rotation, taking accountability for the reliability of the services you build</li>
<li>Apply and champion AI tooling to accelerate engineering workflows, and help raise the team&#39;s overall AI literacy</li>
</ul>
<h3 data-pm-slice="1 3 []">You&#39;ll be great for this role if…</h3>
<ul>
<li>Solid, hands-on experience delivering production-ready backend services end-to-end, including testing, monitoring, and maintenance, on a modern cloud-native stack</li>
<li>Production <strong>experience with Kotlin</strong> and interest in working with a number of other languages (Java, Golang and Elixir)</li>
<li>Solid understanding of distributed systems, API design, data modelling, and working with relational databases</li>
<li>Hands on experience in containerisation, orchestration, and CI/CD practices</li>
<li>Ability to take an ambiguous product problem, define the technical approach, and lead it through to implementation with minimal guidance</li>
<li>Comfort working across teams and communicating clearly in written and spoken English in a professional setting</li>
<li>Genuine curiosity about the product domain — comfortable applying a backend lens during feature refinement and thinking beyond the code to understand how your work shapes the user experience
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</li>
</ul>
<h3 data-pm-slice="1 3 []">Why you should join SumUp</h3>
<ul>
<li>🌎 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</li>
<li>🌈 Commitment to Diversity and Inclusion: be part of a workplace that values and promotes diversity, fostering an inclusive environment where everyone&#39;s perspectives are respected and embraced</li>
<li>🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp&#39;s future success</li>
<li>📚 A dedicated annual L&D budget of €2000 for your individual development, which can be used to attend conferences and/or advance your career through further education</li>
<li>💶 A corporate pension scheme where we match up to 20% of your contributions</li>
<li>🏖 Generous time off: enjoy 28 days of paid leave plus public holidays and special leave days</li>
<li>🏃 Numerous other benefits such as Urban Sports Club subsidy, Kita placement assistance, subsidised office lunches</li>
<li>🌴 Break4me: 1-month sabbatical after 3 years of service</li>
<li>🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team</li>
</ul>
<h3 data-pm-slice="1 1 []">About SumUp</h3>
<p>Be empowered to do more that matters.</p>
<p>At SumUp, we&#39;re on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.</p>
<p>Our commitment to small businesses is reflected in <a class="text-primary underline cursor-pointer" href="https://youtu.be/9DG64C3moeQ?si=YpcWuBNBTOQPzeLI" target="_blank">our diverse team</a> of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. <a class="text-primary underline cursor-pointer" href="https://www.sumup.com/careers/culture/" target="_blank">Our core values</a> lay the foundation for who we are and what we stand for, shaping our work culture and driving our success. We foster inclusivity and a continuous learning culture, providing a safe space for personal and professional growth. Our differences make us unique and strong as we strive to create an environment where everyone belongs and feels supported, no matter how they identify.</p>
<p>SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don&#39;t make hiring or employment decisions based on race, colour, religion or religious belief, ethnic or national origin, nationality, sex, gender, gender identity, sexual orientation, disability, age or any other basis protected by applicable laws or prohibited by company policy. Our commitment extends beyond recruitment to creating a safe and respectful workplace where harassment of any form is strictly prohibited. Discover more about our culture and opportunities on our <a class="text-primary underline cursor-pointer" href="https://www.sumup.com/careers/" target="_blank">careers website</a>, and follow our journey on <a class="text-primary underline cursor-pointer" href="https://www.linkedin.com/company/sumup/" target="_blank">LinkedIn</a>, <a class="text-primary underline cursor-pointer" href="https://www.instagram.com/insidesumup/" target="_blank">Instagram</a>, and <a class="text-primary underline cursor-pointer" href="https://www.tiktok.com/@insidesumup" target="_blank">TikTok</a>.</p><div class="content-conclusion"><p><strong>Job Application Tip</strong></p>
<p><span style="font-weight: 400;">We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.</span></p></div>

SumUp

Backend Engineer - Cards

SumUp is a leading global financial technology company driven by the purpose of levelling the playing field for small businesses. Founded in 2012, SumUp is the financial partner for more than 4 million small merchants in over 36 markets worldwide, helping them start, run and grow their businesses. We're committed to leveraging our success to make the world a better place. We have become a member of 1% for the Planet and pledged to donate 1% of the net revenue generated by Solo devices to support environmental, educational and entrepreneurial causes. To mark 10 years in business, SumUp secured a new substantial funding round at an $8.5B valuation. With small businesses at the heart of what we do, we'll continue to develop new ways to help our customers do business, and our solutions are always intuitive and inclusive. For the second consecutive year, SumUp has been recognised as a Top Global Employer and received the Silver Award on the Stonewall Workplace Equality Index 20223, a remarkable step up from the Bronze Award in 2022 for its commitment to an inclusive and equitable workplace for the LGBTQ+ community.

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Leading the data science, machine learning and software engineering teams , responsible for reducing and mitigating risk, fraud and financial crime and adhering to compliance and regulatory requirements. Tribe lead for risk and compliance business and member of senior leadership team at SumUp.

Vice President of Engineering

TABLET BASED POS SYSTEM FOR HIGH STREET RETAILERSCost effectiveResilientCloud basedElectronic receiptsHighly customisable

Director and CTO

Chief Information Security Officer (CISO)

VP of Growth EMEA

Get paid easily, process orders quickly, sell online instantly and manage your money more efficiently. SumUp creates the tools you need to make your business thrive.Leading Marketing & Growth teams (again) across 7 markets reporting to the Tribe Lead.Managing a team of 70+ split in 7 work streams:- Brand Activation & Events- Content- Marketing Design- CRM & SEO- Website and Analytics - Growth Engineering & MarketOps- Partnership- Pre-Sales (inbound &…  Get paid easily, process orders quickly, sell online instantly and manage your money more efficiently. SumUp creates the tools you need to make your business thrive.Leading Marketing & Growth teams (again) across 7 markets reporting to the Tribe Lead.Managing a team of 70+ split in 7 work streams:- Brand Activation & Events- Content- Marketing Design- CRM & SEO- Website and Analytics - Growth Engineering & MarketOps- Partnership- Pre-Sales (inbound & Outbound) 

VP of Marketing & Growth, POS Tribe

VP Corporate Development

I joined Tiller Systems as CTO during the summer 2019. Tiller was acquired by Sumup in February 2021.In charge of Sumup POS PRO, the technical strategy, budget, R&D & Data organizations and operations / infrastructure:- Operating mainly in 5 countries (FR, IT, ES, DE, US) and 5 languages- Agile : 9 squads, 50 Staffs- Mobile : iPad, iOS, Swift and Kotlin Multiplatform, multi-devices synchronization- SaaS platform : React, styled components, serverless, CQRS microservices,…  I joined Tiller Systems as CTO during the summer 2019. Tiller was acquired by Sumup in February 2021.In charge of Sumup POS PRO, the technical strategy, budget, R&D & Data organizations and operations / infrastructure:- Operating mainly in 5 countries (FR, IT, ES, DE, US) and 5 languages- Agile : 9 squads, 50 Staffs- Mobile : iPad, iOS, Swift and Kotlin Multiplatform, multi-devices synchronization- SaaS platform : React, styled components, serverless, CQRS microservices, Node.js, Typescript, DynamoDB, ElasticSearch, MySQL- DevOps : CI / CD, automation, micro-services architecture, lambda, AWS- Data : streamline data through pipelines to manage billions of events in a datawarehouse, serve analytics and ad hoc data mining to other departments, based on Fivetran, dbt, Snowflake, Metabase 

Vice President of Engineering (Sumup POS PRO, formerly Tiller)

Leading SumUp's Global Banking ambitions for Merchants and Consumers in Europe, Brazil and new markets.

VP Global Banking

VP of Global Design

Co-founder and former Chief Commercial Officer at SumUp, the SMB fintech company

Co-Founder

Chief Financial Officer Latin America

VP Strategy, CEO Office

VP IT Infrastructure & Operations

SVP Compliance and Regulatory Global

Chief Hardware Officer

Vice President QA and Infrastructure

VP Finance / CFO Europe at SumUp

VP Engineering

VP Revenue and Growth

VP of Engineering

SumUp is a financial technology company that allows businesses of all sizes to receive payments quickly and simply, both in-store and online. Named as Europe’s fastest-growing company in the Inc. 5000, SumUp supports over 3 million merchants globally and operates in 34 markets across Europe, the U.S., Brazil and Chile.

Director Of Engineering

VP Lending Europe

CEO Europe

Product for Europe & Tribe Lead Growth Tribe

VP Product - Europe

SumUp is a financial technology company that allows businesses of all sizes to receive payments quickly and simply, both in-store and online. Named as Europe’s fastest-growing company in the Inc. 5000, SumUp supports over 3 million merchants globally and operates in 34 markets across Europe, the U.S., Brazil and Chile. With its card terminals and online services relied upon by businesses of all sizes from DHL to black cab drivers – SumUp is the partner of choice for small businesses from every…  SumUp is a financial technology company that allows businesses of all sizes to receive payments quickly and simply, both in-store and online. Named as Europe’s fastest-growing company in the Inc. 5000, SumUp supports over 3 million merchants globally and operates in 34 markets across Europe, the U.S., Brazil and Chile. With its card terminals and online services relied upon by businesses of all sizes from DHL to black cab drivers – SumUp is the partner of choice for small businesses from every walk of life. 

CEO, North America

VP Industrial Design

Vice President of Global Operations

Chief Operating Officer (SumUp Ltd)

VP - SME, Europe

VP e-commerce

VP Business Operations, POS tribe

SVP of Sales, SumUp USA

Leading POS Sales teams at SumUp.SumUp is a leading financial technology company, operating across 32 markets on three continents.We're building a world where small businesses can be successful doing what they love.We empower business owners by enabling them to accept card payments in-store, in-app and online, in a simple, secure and cost-effective way. Today, our card readers are used by over 2 million merchants aroundthe world.We're continually developing new…  Leading POS Sales teams at SumUp.SumUp is a leading financial technology company, operating across 32 markets on three continents.We're building a world where small businesses can be successful doing what they love.We empower business owners by enabling them to accept card payments in-store, in-app and online, in a simple, secure and cost-effective way. Today, our card readers are used by over 2 million merchants aroundthe world.We're continually developing new ways to help our customers do business, and our solutions are always intuitive and inclusive. We've launched multiple new products in 2020, including SumUP Invoices and Mobile Payments. 

VP of Sales, POS Tribe

VP Marketing & Communications

Chief of Staff Europe

SumUp - We are the leading mobile point-of-sale (mPOS) company in Europe. We started out 6 years ago and built our payment service from scratch to shake up the industry and wake up the entrepreneur within anyone. We created a unique device that with the smartphone that’s in your pocket, allows small merchants to accept card payments anywhere.Whether our merchants are brewing coffee or fixing cars, we want to make technology that anyone can use - so our merchants can get on with what…  SumUp - We are the leading mobile point-of-sale (mPOS) company in Europe. We started out 6 years ago and built our payment service from scratch to shake up the industry and wake up the entrepreneur within anyone. We created a unique device that with the smartphone that’s in your pocket, allows small merchants to accept card payments anywhere.Whether our merchants are brewing coffee or fixing cars, we want to make technology that anyone can use - so our merchants can get on with what they do best. From our paperless onboarding to taking the first payment, we make it easy. Traditional offerings leave out small businesses, we don’t. We are open and honest about our pricing and have no hidden fees.Launched in August 2012, our company enjoys impressive global reach and has since expanded into 31 countries, including Germany, the U.S. and Brazil. SumUp continues to grow and is backed by American Express, BBVA, Groupon, Holtzbrinck Ventures and other renowned venture capital investors.Today, hundreds of thousands of small businesses around the world rely on SumUp to get paid. Beyond our original hardware, mobile and web apps, we have gone on to develop a suite of APIs and SDKs for integrating SumUp payment into other apps and services. 

Managing Director - USA

CEO - USA

VP Engineering - Point of Sale

CEO SumUp Lithuania & global compliance/KYC/AML

SumUp's financial services "Super App for merchants" seamlessly integrates proprietary card terminals and point-of-sale registers with free business account & card, invoicing, online shops and online payments. More than 4 million businesses ‒ from taxi drivers and coffee shop owners to large sports stadiums ‒ trust SumUp for their needs. Our team of 3,000+ people support merchants in 35 countries worldwide. In recent years, SumUp has also expanded with the acquisitions of Goodtill…  SumUp's financial services "Super App for merchants" seamlessly integrates proprietary card terminals and point-of-sale registers with free business account & card, invoicing, online shops and online payments. More than 4 million businesses ‒ from taxi drivers and coffee shop owners to large sports stadiums ‒ trust SumUp for their needs. Our team of 3,000+ people support merchants in 35 countries worldwide. In recent years, SumUp has also expanded with the acquisitions of Goodtill (UK), Tiller (France), and Fivestars (USA). 

Chief Product Officer

Strategy - Global CEO Office

Team Member

Senior Backend Engineer

Senior Backend Engineer - Cards

A team that takes time and effort for its members to develop their skills and knowledge.

A team that prioritizes its members' personal commitments and wellbeing alongside work.

A team that is friendly and enjoys each other's company, chatting, and doing social activities together.

A team that motivates its members through rewards, incentives, and bonuses.

A team that has aggressive goals and motivates its members to achieve their individual goals through competition.

Backend Engineer - Cards at SumUp | Parallel