iOS Engineer - Hardware

Overview

iOS Engineer - Hardware role at Shoplo is now SumUp . On the Hardware team, you’ll build the experiences that connect our SuperApp to the physical devices powering everyday transactions. You’ll work at the intersection of hardware, mobile, and real-time communication , ensuring our merchants enjoy a flawless payment experience under varying conditions. This is a hands-on, high-impact engineering role where you’ll collaborate across disciplines—from embedded firmware to product design—to bring delightful, resilient, and intuitive device experiences to life. You should be a mobile engineer with a product mindset who can fully own the features you are working on and remain flexible with changing priorities.

You’ll tackle complex technical challenges, refine our modular architecture, and build elegant server-driven UI solutions for diverse markets. This isn’t just about writing code – it’s about crafting a product with purpose. You’ll have the chance to see your impact at scale, collaborate globally, and deepen your skills in a supportive and innovative environment. Together, let’s redefine what banking can do for small businesses.

Responsibilities

• Develop and maintain SDKs and features that connect our iOS app to Bluetooth-enabled payment devices.
• Ensure secure, reliable, and low-latency communication between hardware and mobile apps.
• Own critical flows like device pairing, firmware updates, and transaction handling.
• Collaborate with cross-functional teams (Product, Embedded, Backend, QA) to deliver smooth end-to-end payment experiences.
• Champion clean architecture, modular design, and robust testing strategies.

Qualifications

• You have experience building and shipping complex iOS apps or SDKs in both Objective-C & Swift.
• You have good knowledge of architectural design patterns such as MVVM and MVC, and experience ensuring modularized and scalable app architecture.
• You're comfortable with Bluetooth Low Energy (BLE) and debugging connectivity issues.
• You understand multithreading, asynchronous flows, and low-level APIs in iOS.
• You strive for clean code, but also know how to be pragmatic when needed.
• Your precise communication skills are well suited to working in a distributed team.

Why SumUp

• Be part of a company that values diversity and celebrates unique perspectives.
• Work with a global team of skilled professionals in an environment that fosters collaboration, learning, and growth.
• Be part of a global tribe building a banking solution from the ground up and delivering impactful solutions to millions of SumUp merchants worldwide.
• Career growth and learning opportunities: we invest in your development through regular training, mentorship programs, SumUp University leadership cohort, and a yearly learning budget (2,000 EUR).
• Sabbatical program for tenured SumUppers.
• Join a global team where you belong: check out our D&I initiatives and Employee Resource Groups such as Pride Club, SumAfro, Neurodiversity, Grupos Mais, Women in Tech, and more.
• Health & wellness benefits: in-house fitness classes, gym in the office, subsidized Urban Sports Club, and available psychotherapy sessions.
• Other benefits: subsidized public transport card, Kita placement assistance, Pension Scheme, language learning platform/courses, etc.
• Enrollment onto our virtual stock ownership program - you will own a stake in SumUp’s future success.

Job Application Tip

We recognise that candidates feel they need to meet 100% of the job criteria to apply. This is only a guide. If you don’t tick every box, it’s okay — you have room to learn and develop your career at SumUp.

Job Details

• Seniority level: Mid-Senior level
• Employment type: Full-time
• Job function: Engineering and Information Technology

#J-18808-Ljbffr