Senior Mobile Engineer/Technical Lead

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: Rewarded Solutions - Mobile Integrations

The Mobile Integrations Team is part of our Rewarded Solutions Department which develops the technology behind adjoe's innovative rewarded engagement products that serve over 57 million daily mobile users.

Mobile Integrations is responsible for the native Android and iOS SDKs written in Java/Kotlin and Swift that handle much of the complex engagement flows. On top of the SDKs are widely customizable web applications built with React TypeScript; and a highly performant Golang backend hosted on AWS that processes millions of events hourly. Our system matches each game with its ideal users, delivering rewards optimized for satisfaction through data processed via AWS Athena, Kafka, Spark, S3, and MySQL.

For team members, this means having state-of-the-art resources to build engaging rewarded ad experiences that seamlessly integrate into the world’s top apps while delivering exceptional results for advertisers and monetizers in this industry-leading technology.

• A senior-level engineer / technical lead with 6+ years of professional experience in software development.


• Strong hands-on experience in mobile development with Swift (iOS) and/or Kotlin (Android). Experience building or maintaining SDKs is a big plus.


• Comfortable defining architectures, APIs, and technical standards that enable other engineers to move fast without breaking things.


• Experienced in mentoring, coaching, and technically leading engineers with different seniority levels.


• Someone who enjoys translating business requirements into pragmatic technical solutions.


• Able to balance developer experience, security, and performance when designing interfaces and systems.


• A strong communicator who can adapt their level of detail when talking to engineers, product, or senior stakeholders.


• Fluent in English.

• Define and evolve the technical architecture of our mobile SDKs, creating a clear framework that enables consistent, high-quality development.


• Work closely with Product and stakeholders to understand business needs and quickly turn them into technical concepts, features, and solutions.


• Lead, mentor, and develop a team of mobile engineers, helping them grow in code quality, communication, and planning.


• Own and drive technical decision-making for the team, including trade-offs around security, performance, and usability.


• Establish and maintain best practices through regular code reviews, feedback, and technical discussions.


• Collaborate with other Tech Leads and senior engineers across the company to align on standards and platform evolution.


• Play an active role in hiring, team growth, and shaping a healthy, high-performing team culture.

• You’ll work on products used by tens of millions of users every day.


• You’ll have real agency to shape the technical direction of a newly formed team.


• You’ll lead and collaborate with highly experienced engineers across mobile, backend, and QA.


• You’ll influence hiring decisions, team goals, and engineering culture from the ground up.


• You’ll operate in a setup where technical excellence and business impact go hand in hand.

• 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.