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Freelance Senior QA Engineer (Mobile) (m/f/d)

UnzerBerlin🇩🇪GermanyPosted 8 Jul 2026

Why This Role Stands Out

As a Freelance Senior QA Engineer at Unzer, you'll drive quality for innovative mobile POS applications, impacting seamless payment experiences for e-commerce and retail businesses across Europe. This hybrid role offers significant growth potential within a reputable fintech leader, perfect for experienced QA professionals passionate about mobile technology and hardware integration. Apply now to contribute to a diverse and dynamic international team!

Quick Overview

Seniority
Mid Senior
Employment type
Temporary/Casual
Work mode
Hybrid
Location
Berlin, Germany
Posted
3 months ago
SwiftKotliniOSAndroid

Job Description

ABOUT US
Unzer is a leading European fintech company with a mission to simplify international payments for e-commerce and retail businesses. Our brand was formed from 13 companies that now contribute to building a unique product covering the entire payment flow.  
At Unzer, we are driven by the belief that customers should enjoy a seamless shopping experience, no matter where they choose to shop. We are a team of over 700 experts of 55 different nationalities, dedicated to creating a state-of-the-art unified commerce platform. Our goal is to enable businesses to delight their customers with a seamless payment experience.  
Whether you're a tech enthusiast, payment expert, or a dedicated support professional, we are looking for individuals who are passionate about making a difference.  
 
Our offices: We are based across Austria, Denmark, Germany and Luxembourg with a HQ in Berlin.
 
ABOUT THE TEAM

The Unzer Unified POS team builds our native point-of-sale apps for iOS (Swift) and Android (Kotlin). Merchants use them every day at the counter, in shops and restaurants.  Our apps talk to real hardware: card payment terminals, receipt printers, barcode scanners, cash drawers and fiscal devices. A bug here doesn't just show a wrong screen.  It can stop a merchant from taking a payment.


We're looking for a QA Engineer focused on mobile test automation who also enjoys working hands-on with hardware. You'll build and own automated tests across both platforms. You'll also be the person who knows exactly what happens when the printer runs out of paper halfway through a receipt, or when the terminal drops its connection during a card payment.

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