Product Engineer, Working Student

Location: Berlin, Germany

Department: Fullstack

Working Student - Product Engineer

Over 4 million merchants use our card readers to process payments in 34 countries. As we build a world where every business can thrive, we continually expand our range of products and services. We are a truly global fintech company, with 3000+ people from 93 nationalities spread across 22 offices on 4 continents.

As the People Tech team, our mission is to enable long-term scalability by fostering a data-informed culture through seamless systems and a people-centric employee experience. As our Product Engineer – Working Student, you will help shape how internal People products are built by rapidly exploring, testing, and validating new product experiences.

This role is perfect for a student or early-career professional who enjoys building frontend-heavy applications, experimenting with ideas, and turning concepts into tangible prototypes. You will work hands-on to explore different product directions, challenge assumptions, and help the team understand what to build.

What you’ll do:

• Rapidly iterate on product ideas in short cycles (days, not weeks)

• Explore and compare different product directions through hands-on experimentation

• Translate ideas and requirements into tangible prototypes that stakeholders can experience and evaluate

• Work closely with Product Owners and domain experts to refine concepts and improve user experience

• Document learnings and key insights from prototypes to inform product decisions

You’ll be great for this role if:

• You’re curious, hands-on, and love learning new tools or finding besser ways to get things done.

• You enjoy building frontend-heavy applications and turning ideas into working prototypes

• You have experience with modern frontend tools (e.g. React, Next.js or similar)

• You think in terms of user experience and product flows, not just technical implementation

• You’re comfortable working in ambiguity and exploring different approaches before settling on a solution

• You communicate clearly and collaborate well with both technical and non-technical stakeholders

Nice to have:

• Experience building internal tools or business applications

• Experience with AI-assisted coding using tools like Cursor, GitHub Copilot, v0, Lovable or similar

• Basic understanding of authentication (OAuth, SSO) and data handling concepts

Why you should join SumUp

• We’re a truly global team of 3000+ people from 93+ countries, spread across 4 continents. We have a close, welcoming and international community

• Yoga classes, running & football teams, subsidised Urban Sports Club membership

• Mobility Options : company transportation ticket or bike leasing

• A discount platform for all SumUp employees with more than 700 brands with discounts that can reach 60%

SumUp 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.

About us:

SumUp is a leading financial technology company, founded in 2012 with the goal of empowering small businesses around the globe. We’re the financial partner of choice for more than 4 million merchants in over 35 markets. We collectively build, plan and fine-tune the technology that drives SumUp and empowers small businesses around the world.

We believe in the everyday hero. Those who have the courage to follow their passion and who have the strength and determination to realise their dreams. Small business owners are at the heart of all we do, so we're creating powerful, easy-to-use financial solutions to help them run their business. With a founders mentality and a 'team-first attitude' our diverse teams across Europe, South America, and the United States work together to ensure that small business owners can be successful doing what they love.