SumUp Accelerator – Software Engineer Intern

Job description

Build real products that help millions of small businesses thrive. At SumUp, we build fintech tools that empower over 4 million merchants across 37 markets to run and grow their businesses. The Warsaw Accelerator Program puts you at the heart of that mission - working on real product challenges in the Sell Online domain, from reducing merchant onboarding friction to building AI-powered tools that save merchants time and drive revenue. This isn't a traditional internship. From day one, you'll join a small product team, take real ownership of a problem, and ship a working MVP alongside experienced engineers and product mentors. The top three performers will be offered a one-year contract at the end of the programme. 📍 Location: Warsaw, Hala Koszyki (office-first) ⏱ Duration: 3 months, 15th July – 15th October 2026 (full time) 💰 Salary: 8,000 PLN gross per month (Civil Law Contract / Umowa Zlecenie) Curious what that actually looks like? Watch how our Accelerator participants become contributors to real-world features at SumUp. What you'll work on: You'll join one of two teams tackling real merchant problems, including: - Reducing onboarding friction by automating merchant setup and d...