Mobile Engineering Intern (Android / iOS)

A full-time mobile software engineering internship at SumUp where you build Android or iOS features and integrate mobile apps with backend systems used by millions of small businesses.

Build AI-powered products that impact millions of small businesses.

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.

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.

Starting Salary: £32,500  

What You'll Work On

You'll contribute to greenfield mobile products and major features within the SumUp ecosystem, with a focus on:

• Mobile development for Android or iOS

• Integrating mobile experiences with SumUp's backend APIs and data systems

• Building user-facing features used daily by millions of merchants

Mobile training is provided during the programme,  you don't need to be a mobile specialist on day one.

Your Impact

Working alongside experienced engineers, designers, and product managers, you will:

• Build and ship mobile features for SumUp's merchant-facing products

• Integrate with core SumUp systems, APIs, 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

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

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 a related field

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

• Have hands-on experience with at least one modern language — Swift, Java, Kotlin

• Have some exposure to mobile development (Android or iOS) — or a strong eagerness to learn

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

• Are passionate about building intuitive, user-focused mobile experiences

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

Why Join SumUp?

• Impact with Purpose — Ship mobile features used by millions of small businesses. This isn't a sandbox.

• Career Path — Fast-track into a full-time role with a significant salary increase at the end of the programme.

• Come As You Are — A workplace that celebrates diversity and fosters an inclusion-first culture. 

• Office Perks — Complimentary breakfast every Wednesday and lunch on Thursdays.

• Team Culture — Regular social events to connect and unwind.

About SumUp

Be empowered to build things that matter.

At SumUp, we're on a mission to empower small businesses across the globe by providing simple and affordable tools that allow them to thrive. Today, over 4 million businesses in 37 markets rely on SumUp as their financial partner to manage payments, finance and customer relationships.

Our commitment to small businesses is reflected in our diverse teamOpens in new window of over 3,000 SumUppers from over 90 nationalities, united by global collaboration and an innovative mindset. Our core values and cultureOpens in new window shape everything we do, fostering inclusion, learning and belonging 

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