Senior Mobile Developer (f/m/d) - #2189311

adjoe is a leading mobile ad platform developing cutting-edge advertising and monetization solutions to meet the diverse needs of app publishers. Being part of the applike group ecosystem plus the significant financial backing from Bertelsmann empowers us to do this. At adjoe, we are proud of our advanced tech stack and dynamic and innovative workforce.

Meet Your Team: Anti-Fraud Solutions

Our Anti-Fraud Solutions team tackles one of adtech's biggest challenges: industry reports suggest 25% of global mobile ad spend is fraudulent.

We've built sophisticated systems that actively prevent fraud from impacting our partners' business. At the core of our solution are custom-built mobile SDKs for Android and iOS, which analyze device integrity and detect modifications like Xposed frameworks, Magisk modules or jailbroken devices.

Our distributed cloud infrastructure powered by SQS and Kafka processes billions of daily events to flag suspicious behaviors in real time, while Go-based microservices deliver millisecond-level responses through DynamoDB.

For developers interested in security engineering, this means working with cutting-edge tech to continuously outsmart even the most creative fraud tactics.

• Work on our iOS and Android SDKs that run on tens of millions of devices every day.


• Work closely with Backend and QA engineers to deliver necessary features


• Collaborate with other teams contributing to the same project to align on best practices and architecture


• Become a go-to expert for the team when it comes to platform-specific capabilities


• Investigate ways users can break or fool our fraud prevention methods in our SDKs

• You have a degree in computer science (or a similar field) and 4+ years of combined work experience in iOS and ideally Android development


• You have good knowledge of Swift and ideally Java/Kotlin


• You are proficient in both iOS and ideally Android -app, -operating systems, -and service life cycles


• You keep up to date with trends and changes in mobile development


• Optional: SDK development experience

• Invest in Your Future: Regular feedback and our development program support your growth, helping you expand your skill set and achieve your career goals.


• Easy Arrival to adjoe: From signing to settling in Hamburg, we’ve got you covered. Need a visa? No problem. Ready to build your new life and career at adjoe in Hamburg? We support every ambition—from learning German to a relocation bonus that helps you settle in and make Hamburg feel like home.


• Live Your Best Life, at Work and Beyond: We work in a hybrid setup with 3 core office days, plus flexible working hours. Enjoy 30 vacation days, 3 weeks of remote work per year, and free access to an in-house gym with lots of different fitness classes and mental health support through our Employee Assistance Program (EAP).


• Thrive Where You Work: Enjoy the Alster lake view from our central office with top notch equipment, fun open spaces, and a large variety of snacks and drinks.


• Join the Community! Participate in regular team and company events, including hackathons and social gatherings. We work together, and we celebrate together, too.

Skip writing cover letters. Tell us about your most passionate personal project, your desired salary and your earliest possible start date. We are looking forward to your application!

We welcome applications from people who will contribute to the diversity of our company.