Senior Backend Engineer
SumUp is looking for a Senior Backend Engineer to join its Consumer Mission, building a rewarding banking experience that connects people to the small businesses they love. You will take ownership of backend services close to consumers, tackling challenges such as critical infrastructure migrations, uninterrupted payment experiences, open banking integrations and high-availability banking systems. This is an office-first position based in SumUp's central Covent Garden location in London, with no visa sponsorship available.
Responsibilities
- ▹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, using Go with Docker and Kubernetes
- ▹Take ownership of critical infrastructure migrations, including banking core system transitions, without disrupting live customer experiences
- ▹Collaborate with cross-functional teams (product, design, data science, security, operations) and contribute to architecture discussions
- ▹Support fellow developers and help build a collaborative, innovative engineering culture
- ▹Shape technical architecture and lead code reviews, promoting best practices in code quality, testing, automation and security
- ▹Build and integrate tools and systems that improve operational efficiency and reliability, with strong observability, and take part in incident response and post-mortems
Requirements
- ▹Strong proficiency in Go, Kotlin or Python, with a track record of building scalable, production-grade backend services
- ▹Experience 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 high-availability trade-offs
- ▹Comfort navigating complex, regulated environments such as financial services or payments
- ▹A collaborative, product-oriented mindset with the ability to work independently, communicate clearly and adapt when priorities shift
Nice to have
- ▹Previous experience in a Growth-focused engineering team
- ▹Familiarity with the Fintech or Banking regulatory landscape
Soft skills
What we offer
- ▹Virtual Stock Option programme (stake in SumUp's future success)
- ▹28 days of paid leave plus bank holidays and special leaves
- ▹Annual L&D budget for conferences and further education
- ▹Private health insurance, including optical and dental
- ▹Salary-sacrifice commuter benefits via Gogeta
- ▹Retirement scheme (SumUp matches 7% when you contribute 5%)
- ▹Life insurance from MetLife for 2x your salary
- ▹1-month sabbatical after 3 years of service (Break4me)
- ▹Referral bonus
About the company
SumUp is on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships. Its diverse team of over 3,000 SumUppers from over 90 nationalities is united by global collaboration and an innovative mindset. SumUp is proud to be an Equal Employment Opportunity employer.