KeyStep

Software Engineer II

SumUp
Barcelona, Spain
6 days ago
full-time

Skills & Technologies

PythonJavaGolangKotlinBackendScalabilityOOPCash FlowIntegration

Job Description

About SumUp

We believe in the everyday hero.

Small business owners are at the heart of all we do, so we're creating tools that help them run their businesses. With a founder’s mentality and a 'team-first’ attitude, our diverse teams across Europe, South America and the United States work together to ensure that the small business owners we partner with can be successful doing what they love.

Team Description

The Lending team offers a fair, easy, timely, and financially relevant lending experience to small merchants. Empower small business owners to manage their financing independently of the stage of their business, either funding their growth, managing their cash flow,w or covering their operational costs. Enable capital to be available to our merchants and consumers, always and everywhere.

We are looking for new Engineers for our team responsible for developing and maintaining the backend of a critical piece of a lending business: Dunning & Collection. This process is responsible for reaching out our merchants, building repayment plans, and providing alternative payment methods for our customers to stay on track with their financial obligations with SumUp. This includes designing, implementing, and testing new features, as well as improving the performance and scalability of existing ones.

What you’ll do

The goal is to improve the functionality and user experience of SumUp's lending platform and to ensure that it meets the needs of our merchants.

Design and implement new micro-services to cover different use-cases on Dunning & Collection journey, considering nuances between markets;

Improve the performance and scalability of the systems;

Design and develop integration with external partners to enable growth.

Contribute to the development of a high-performing team.

You’ll be great for this role if

1-3 years of experience as a Software Engineer

Experience with Golang or other OOP languages such as Java, Kotlin, Python, etc.

Experience in creating an

Company & Role Analysis

JobSeeker+
Likely perks
Private MedicalPension25+ Days HolidayStock OptionsLearning BudgetFlexible Hours
Culture & working style

Neutral 2–4 sentence summary of what working at this company is like, drawn from public reviews and press coverage. Tone, collaboration style, pace, benefits highlights.

Market salary range

£45,000 – £60,000 (Glassdoor, Levels.fyi, 2025)

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