> Markdown version of [/jobs/ext/1940798-senior-software-engineer](https://www.wearedevelopers.com/jobs/ext/1940798-senior-software-engineer). 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). --- # Senior Software Engineer - **Company:** Sumup - **Location:** Madrid, Spain - **Contract:** Permanent contract - **Skills:** Java (Programming Language), Python (Programming Language), PostgreSQL, NoSQL, Oop Languages, SQL Databases, ReactJS, Git, Kotlin, Restful APIs, Golang - **Published:** August 5, 2026 - **Apply:** https://www.buscojobs.com.es/senior-software-engineer-en-madrid-ID-365523497 ## About the Role More than 4 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.li> Experience with SQL and NoSQL databases, such as PostgreSQL. Additional Qualifications Good English communication skills to engage in technical refinements with an international team. Experience in a fintech/startup environment. ## 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 DescriptionThe 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, or covering their operational costs.Enable capital to be available to our merchants and consumers, always and everywhere.What You'll DoThe 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 develop Risk Assessment and Dunning & Collection micro?services, considering differences 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.QualificationsMore than 4 years of experience as a Software EngineerExperience 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.li>Experience with SQL and NoSQL databases, such as PostgreSQL.Additional QualificationsGood English communication skills to engage in technical refinements with an international team.Experience in a fintech/startup environment.BenefitsOpportunity to work with a truly global, multicultural team (we are ****+ people from 93 countries, spread across 4 continents).Learning & development budget for attending conferences and external training.Competitive salary package and virtual stock option program.Office relaxation activities such as yoga and massages, regular brunches, football events, and office parties.23 days paid vacation days.Additional health insurance and Multisport card.Restaurant ticket.An amazing team and work environment that works with passion and purpose to achieve incredible results.Equal Employment OpportunitySumUp is an Equal Employment Opportunity employer that proudly pursues and hires a diverse workforce.SumUp does not make hiring or employment decisions on the basis of 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.SumUp also strives for a healthy and safe workplace and strictly prohibits harassment of any kind.Application PolicySumUp will not accept unsolicited resumes from any source other than directly from a candidate.#J-*****-Ljbffr ## 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) - [Build and Deploy a Fullstack App with Open Source Tooling](https://www.wearedevelopers.com/videos/775-build-and-deploy-a-fullstack-app-with-open-source-tooling) - [Git for Code Reviews](https://www.wearedevelopers.com/videos/429-git-for-code-reviews) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london) - [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? 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