Berlin, Germany · Engineering

Program length: Up to 12 months (full-time, paid)

Start: April 2026

Cohort size: Limited (14 total across all tracks - Data Analyst, Software Engineer, ML Engineering, Data Scientist)

Target profiles: Final-year students, recent graduates, early-career engineers (0–2 years)

Build AI-powered products that impact millions of small businesses - at the start of your career.

At SumUp , we build fintech solutions that empower over 4 million merchants across 37 markets to run and grow their businesses. Every day, this generates rich payments and business data - and SumUp’s next-gen AI tools turn that data into practical insights and intelligent tools that create real merchant value.

The SumUp Accelerator is a two part, up to 12-month, full-time, paid Program for early-career engineers who want to learn fast by working on real production systems.

This is not a traditional internship. From day one, you’ll join a product squad, contribute to shared codebases, and ship production code used by merchants every day.

What you’ll work on

As part of a Software Engineering track, you’ll gradually grow into one of several focus areas:

• Backend & Fullstack engineering (APIs, services, dashboards)

• AI-enabled backend systems

• Data Engineer

• Mobile development (Android / iOS - training provided during the Program)

Your Impact and What You’ll Do

As part of an the Accelerator squad, you’ll work alongside experienced engineers, data scientists, and product managers to:

• Build end-to-end product features for SumUp’s AI Initiative - from backend APIs, data pipelines, to user-facing services.

• Integrate with core SumUp systems, databases, and internal tooling

• Write clean, testable, well-documented code following team standards

• Participate fully in team rituals: planning, technical discussions, code reviews, and knowledge-sharing sessions.

• Learn and apply engineering best practices across software development, AI systems, and UI/UX design.

• Take ownership, iterate quickly on ideas and prototypes, and learn by shipping real features.

Your work will directly shape how millions of small businesses operate.

Mentorship, Growth & Career Path

The Accelerator is designed for fast learning and real impact, preparing you with the skills and experience needed to succeed in a long-term role at SumUp.

• Primary mentor for every participant

• Weekly check-ins focused on delivery, feedback, and growth

• Hands-on learning through real production challenges, not simulations

• Work as a full contributing engineer with support to grow confidently

You might be a great fit if you

• Are a recent graduate (Bachelor’s or Master’s), final year student, or early-career professional (0–2 years’ experience) in Computer Science / Software Engineering or related fields.

• Understand data structures, algorithms, and object-oriented programming.

• Have hands-on experience with at least one modern language (Python,Java, JavaScript, or Go preferred) and experience.

• Are familiar with Git and collaborative workflows (branches, pull requests)

• Understanding of client-server architecture and HTTP fundamentals.

• Awareness of RDBMS concepts, able to write simple SQL queries, and understands how data is structured and accessed.

• Write clean, functional code and actively seek feedback for improvement.

• Are curious about AI, data, and how technology creates real merchant value

• Learn fast, welcome feedback, and enjoy working in collaborative cross-functional teams.

We apply a consistent technical bar focused on fundamentals - not pedigree - and welcome candidates from a wide range of backgrounds.

Why you should join SumUp

Impact with Purpose: See your impact and ship products used by millions of small businesses worldwide while building SumUp’s next-gen AI tools. This isn’t a sandbox - it’s a chance to get hands-on with the tech shaping the future of finance from our Berlin office.

Career Path: This program is aimed at fast-tracking graduates into full-time roles with a significant salary increase.

Come as you are: Be part of a workplace that celebrates diversity and fosters an inclusion-first culture. Here, unique perspectives are respected and used to build products that truly work for everyone.

Fueled for Success: Kick off your week with a free SumUp Breakfast every Monday and enjoy subsidized lunches Tuesday through Thursday.

⚽️ Stay Active Your Way: Whether you’re into football, bouldering, or beach volleyball, we have a team for you. Plus, an in-office gym and subsidized Urban Sports Club memberships.

Social by Design: Between our gaming areas, rooftop drinks, and regular social events, you’ll find a community that works and plays together.

Paid Internship: 3466€ per month, and a significant increase if offered a full-time role at the end of the program.

You’ll have access to many other benefits, such as discount platforms and transport ticket/mobility options.

Duration: 3 months (initial) + 9 months (extension). Participation in the full 12-month program is subject to a performance review at the end of the first 3-month term.

About SumUp

At SumUp, we’re on a mission to empower small businesses around the world with simple, affordable tools to help them start, run, and grow. More than 4 million merchants across 36 markets trust us as their financial partner — and we’re just getting started.

We’re a global team of 3,000+ people from over 90 nationalities, united by curiosity, collaboration, and care. Our

SumUp is proud to be an Equal Employment Opportunity employer, committed to building a safe, respectful, and diverse workplace where everyone can thrive.

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria in order to apply for a job. Please note that this is only a guide. If you don’t tick every box, it’s ok too because it means you have room to learn and develop your career at SumUp.