---
title: 'Senior Backend Engineer at SumUp'
canonical: 'https://feeny.ai/job/senior-backend-engineer-sumup-london-england-9r9bgnz6t1sm'
type: 'job'
last_seen: '2026-09-08'
---

# Senior Backend Engineer at SumUp

- **Company:** SumUp
- **Location:** London England, United Kingdom
- **Posted:** 2026-09-07
- **Last confirmed live:** 2026-09-08
- **Apply:** https://sumup.com/careers/positions/8773682002?gh_jid=8773682002

## Job description

## About the team

At SumUp, we're on a mission to bring merchants and consumers closer together and help local communities thrive. Within the Consumer Mission, we're building a rewarding banking experience that connects people to the small businesses they love while tackling some of the most technically demanding challenges in fintech: critical infrastructure migrations, smooth, uninterrupted payment experiences, seamless open banking integrations, and high‑availability banking systems that can’t afford to fail – all while enabling free transactions for our merchants.

This role sits at the heart of that work — you’ll take real ownership of backend services that are close to our consumers, directly shaping their everyday experience, with impact that’s visible and felt across the entire platform.

## What you'll do

- Build and maintain Backend services for Core neobanking features including bank transfers, open banking, savings accounts, and payment processing
- Take end-to-end ownership of features and projects, covering scoping, design, development, testing, deployment, and maintenance, leveraging Go along with Docker and Kubernetes for container orchestration.
- Take ownership of critical infrastructure migrations — including our banking core system transitions — without disrupting live customer experiences
- Collaborate closely with cross-functional teams including product, design, data science, security, and operations) to understand requirements, provide technical insights, and contribute to architecture discussions that ship meaningful banking features end-to-end
- Support fellow developers and actively help build a collaborative, innovative engineering culture
- Shape technical architecture and lead code reviews, helping define and promote best practices in code quality, testing, automation, and security to raise the overall engineering bar.
- Build and integrate tools and systems that improve operational efficiency and reliability, with strong observability through monitoring, alerting, and hands‑on involvement in incident response and post‑mortems.

You'll be great for this role if you have…

- Strong proficiency in Go, Kotlin or Python, with a track record of building scalable, production-grade backend services
- Experience working with cloud platforms (AWS or comparable) and container orchestration tools such as Docker and Kubernetes
- Solid understanding of SQL and NoSQL databases, distributed systems, and the trade-offs that come with high-availability requirements
- Comfort navigating complex, regulated environments — whether that's financial services, payments, or similarly high-stakes domains
- A collaborative, product-oriented mindset with the ability to work independently, communicate clearly, and adapt when priorities shift

Any of the following would be considered a plus

- Previous experience in a Growth-focused engineering team.
- Familiarity with the Fintech or Banking regulatory landscape.

No visa sponsorship available with this position

## Why you should join SumUp

- 🌎 Opportunity to work with a truly global, multicultural team from our central London Bridge location. This involves an office-first setup
- 🌈 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
- 🚀 Enrolment onto our Virtual Stock Option programme: you will own a stake in SumUp's future success
- 🏖 Generous time off: enjoy 28 days of paid leave, plus bank holidays and special leaves
- 📚 A dedicated annual L&D budget for attending conferences and/or advancing your career through further education
- 🏥 Health matters: private health insurance, including optical and dental
- 🚗 Life made easier: salary-sacrifice commuter benefits via Gogeta
- 💼 Financial security: retirement scheme (SumUp matches 7% when you contribute 5%)
- 🛡 Peace of mind: life insurance from MetLife for 2× your salary
- 🌴 Break4me: 1-month sabbatical after 3 years of service
- 🔗 Referral Bonus: earn additional rewards by referring talented individuals to join the SumUp team

## About SumUp

Be empowered to do more that matters.

At SumUp, we'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.

Our commitment to small businesses is reflected in [our diverse team](https://youtu.be/9DG64C3moeQ?si=YpcWuBNBTOQPzeLI) of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. [Our core values](https://www.sumup.com/careers/culture/) 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.

SumUp is proud to be an Equal Employment Opportunity employer, actively seeking and embracing diversity in our workforce. We don'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 [careers website](https://www.sumup.com/careers/), and follow our journey on [LinkedIn](https://www.linkedin.com/company/sumup/), [Instagram](https://www.instagram.com/insidesumup/), and [TikTok](https://www.tiktok.com/@insidesumup).

📽 Want to bring this role to life visually? Check out our [Global Employer Brand video library](https://www.notion.so/sumup/Global-Employer-Brand-video-library-Empowering-Talent-Acquisition-partners-and-hiring-managers-194d3d97eb3c4eaca7ee2edff1a9d3fd) to add a video to your job post or create LinkedIn content. Job Application Tip

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.

## About SumUp

## Company Overview
- **One-liner**: SumUp is a global fintech company that provides simple, affordable payment and financial management tools to help small businesses start, run, and grow.
- **Entity Type**: Private (Funding stage not publicly available)
- **Headquarters**: London, United Kingdom
- **Founded**: 2012
- **Founders**: Not specified in provided sources

## Core Business
- **Primary industry**: Financial Services / Fintech (Payments)
- **Target customers**: Small and medium-sized businesses (SMBs), B2B
- **Mission or purpose statement**: "Empower small businesses all over the world." — with the vision of "a world where everyone can build a thriving business."

## Products & Services
- **Payment Processing (Card Readers & POS)**: Hardware and software solutions for in-person and online payments, enabling merchants to accept card and contactless payments.
- **SumUp Business Account**: A digital business account for managing finances and transactions.
- **Invoicing & Customer Relationship Tools**: Tools to create invoices, manage customers, and streamline operations.

## Market Standing
- **Valuation/Market Cap**: Not disclosed (private company)
- **Key Metric**: Over 4 million merchants served across 37 markets; 3,000+ employees from more than 90 nationalities
- **Notable Investors/Partners**: Not listed in provided sources
- **Growth Signals**: Headcount growth to 3,000+; recognition as a Top Global Employer for inclusion (Stonewall Workplace Equality Index 2022/2023) and Fintech Diversity Initiative of the Year (2025); expansion across 4 continents with 20+ offices.

## Competitive Advantages
- **Global reach**: Operating in 37 markets with localized products and support.
- **Merchant focus**: Deep commitment to small business owners, with products designed specifically for their needs.
- **Inclusive culture**: Strong diversity and inclusion programs, gender parity in workforce, and employee-led communities (e.g., Pride Club).
- **Autonomous teams**: Small, empowered teams with servant leadership, fostering innovation and speed.

## Strategic Focus
- Expanding product and service portfolio to become a complete financial partner for small businesses.
- Continuing to invest in a learning culture (SumUp University) and employee development.
- Maintaining an office-first culture while enabling occasional remote work to balance collaboration and flexibility.
- Growing market presence by entering new geographies and deepening existing ones.

## Why Work Here
- **Culture**: Office-first company that values human connection, autonomy, and continuous learning. Core values include Team First, We Care, and Founder’s Mentality.
- **Remote/Hybrid policy**: Office-first with the ability to work remotely occasionally, as agreed with teams.
- **Benefits**: Relocation support for overseas hires, dedicated budget for conferences and external training, and location-specific perks.
- **Engineering culture**: Autonomous teams, servant leadership, and a focus on pragmatic, self-driven problem-solving.
- **Inclusion**: Recognized as a Top Global Employer for inclusion; active LGBTQ+ community and gender parity initiatives.
- **Hiring process**: Transparent, with recruiter screening, hiring manager interview, technical assessment, team interview, bar raiser, and final offer.

## Sources
1. [sumup.com](https://www.sumup.com/careers/)
2. [linkedin.com](https://www.linkedin.com/company/sumup)
3. [sumup.com](https://www.sumup.com/careers/culture/)
4. [sumup.com](https://www.sumup.com/careers/positions/)
5. [sumup.com](https://www.sumup.com/careers/how-we-hire/)

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