> Markdown version of [/jobs/ext/1644231-software-engineer-ii](https://www.wearedevelopers.com/jobs/ext/1644231-software-engineer-ii). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Software Engineer II

- **Company:** Sumup
- **Location:** Barcelona, Spain
- **Salary:** €70,000.0 - €90,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Python (Programming Language), PostgreSQL, NoSQL, Oop Languages, SQL Databases, ReactJS, Backend, Git, Kotlin, Git Flow, Restful APIs, Golang
- **Published:** July 17, 2026
- **Apply:** https://www.adzuna.es/contact-us.html

## About the Role

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 and maintaining simple components in React.
Experience with RESTful API design and development.
Experience with Git and Git workflows.
Experience with SQL and NoSQL databases, such as PostgreSQL, Good English communication skills to engage in technical refinements with an international team
Experience in a fintech/startup environment

## Description

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.


## Related Videos

- [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider)
- [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94)
- [Leveraging Real time data in FSIs](https://www.wearedevelopers.com/videos/806-leveraging-real-time-data-in-fsis)
- [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse)
- [Recruitment Reinvented: Bold strategies and the $10K signing incentive](https://www.wearedevelopers.com/videos/1068-recruitment-reinvented-bold-strategies-and-the-10k-signing-incentive)
- [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews)

## Related Articles

- [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)
- [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023)
- [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries)
- [How Much Does a Software Engineer Make? Realistic Software Engineering Salaries](https://www.wearedevelopers.com/magazine/425-how-much-does-a-software-engineer-make-realistic-software-engineering-salaries)
- [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs)
- [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers)