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Senior Mobile Developer (f/m/d) 🚀

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


Industry experts report that 20 percent of global mobile ad spend can be identified as fraud. adjoe’s Anti-Fraud team has both validated this number and prevented fraudulent users from entering partners’ ad spend.


The team’s software includes two major components. 1) A distributed backend system with modern cloud infrastructure that provides different interfaces to partners. 2) A unique mobile SDK that analyzes device features to detect modifications via xposed or magisk.


With no one-size-fits-all solution, the Anti-Fraud team works with a large set of features. From detecting attempts based on data with static patterns, using proprietary solutions to detect software manipulation, marking network traffic abnormalities, and identifying when to warn or even block requests.


Join a team that is excited about the latest technologies and is highly interested in data, security, cloud computing, and mobile operating systems. Not to mention a team that celebrates many awards for leading the way in fraud prevention.



What will you do
  • 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


Who you are
  • 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


Fuel for the Journey: Benefits to Support Your Ambitions
  • 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.



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Average salary estimate

$70000 / YEARLY (est.)
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$60000K
$80000K

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What You Should Know About Senior Mobile Developer (f/m/d) 🚀, AppLike Group

Join adjoe as a Senior Mobile Developer (f/m/d) in vibrant Hamburg, where innovation thrives at the heart of our leading mobile ad platform! We're committed to delivering top-notch advertising and monetization solutions tailored for app publishers. With strong backing from Bertelsmann and being part of the applike group, we’re positioned to make a significant impact in the mobile advertising landscape. As a Senior Mobile Developer, you'll work closely with our passionate Anti-Fraud team, renowned for its cutting-edge software that prevents fraudulent activities, safeguarding our partners’ investments. In this role, you’ll develop our iOS and Android SDKs, which operate on tens of millions of devices daily. Collaboration is key, so you'll work alongside backend and QA engineers, ensuring that we deliver top-tier features. You’ll become the go-to expert on platform-specific capabilities and actively explore ways to enhance our fraud prevention efforts. If you have a degree in computer science and over four years of experience in mobile development, particularly with Swift and ideally Java/Kotlin, we'd love to meet you. At adjoe, we celebrate diversity and offer an array of benefits to support your growth, well-being, and work-life balance. Come be a part of our dynamic team and help us shape the future of mobile advertising!

Frequently Asked Questions (FAQs) for Senior Mobile Developer (f/m/d) 🚀 Role at AppLike Group
What are the main responsibilities of a Senior Mobile Developer at adjoe?

As a Senior Mobile Developer at adjoe, your primary responsibilities include developing iOS and Android SDKs, collaborating with backend and QA engineers to deliver essential features, and aligning closely with other teams to establish best practices. You will delve into platform-specific capabilities, ensuring that our fraud prevention methods are robust against manipulative attempts.

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What qualifications are required for the Senior Mobile Developer position at adjoe?

For the Senior Mobile Developer position at adjoe, applicants should possess a degree in computer science or a related field, along with 4+ years of experience in mobile development, particularly in iOS, and ideally Android. Proficiency in Swift and a good understanding of Java/Kotlin are vital for success in this role.

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What technologies will I work with as a Senior Mobile Developer at adjoe?

At adjoe, you will work with a modern tech stack, focusing on iOS and Android SDK development. Familiarity with cloud infrastructure and the latest trends in mobile development will be advantageous as you contribute to our advanced anti-fraud solutions.

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What is the work culture like for a Senior Mobile Developer at adjoe?

The work culture at adjoe for a Senior Mobile Developer is dynamic and innovative. We foster collaboration and creativity across teams, regularly engage in team events, and encourage participation in hackathons, all while enjoying a hybrid work setup that promotes a healthy work-life balance.

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What benefits does adjoe offer to its Senior Mobile Developers?

adjoe provides numerous benefits, including a supportive development program, flexible working hours, 30 vacation days, three weeks of remote work per year, in-house gym access, and more. We also assist with relocation and provide resources for professional growth.

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Common Interview Questions for Senior Mobile Developer (f/m/d) 🚀
Can you describe your experience with iOS and Android development?

When answering this question, share specific projects that highlight your expertise in both iOS and Android development. Discuss the technologies used, your role in those projects, and what outcomes you achieved, focusing on how it aligns with adjoe's needs.

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What strategies do you employ to prevent fraud in mobile applications?

Outline preventative measures such as user behavior analysis, employing robust validation techniques, and using SDKs for real-time fraud detection. Emphasize your experience with methodologies that align with adjoe’s focus on anti-fraud solutions.

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How do you keep up with trends in mobile development?

Mention your methods for staying informed, including following industry blogs, participating in webinars, or attending conferences. Highlight how continuously learning and adapting has improved your development skills and project outcomes.

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Describe a challenging problem you faced in mobile app development and how you resolved it.

Choose a relevant example that demonstrates your problem-solving abilities. Discuss the issue, why it was complex, and the steps you took to identify and implement a solution, showcasing your analytical and critical-thinking skills.

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What are the key differences between developing for iOS and Android platforms?

Discuss the varied frameworks, programming languages, and operating system features of both platforms. Mention how understanding these differences influences your development process and how you manage cross-platform functionality.

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Can you explain your process for collaborating with backend engineers?

Talk about how you ensure effective communication through regular updates, using project management tools, and maintaining clarity on API specifications. Provide examples of successful collaborations that resulted in enhanced app performance.

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What do you think makes a mobile app user-friendly?

Focus on aspects like intuitive UI/UX design, responsiveness, and fast load times. Emphasize your approach to user-centered design and how you incorporate user feedback into your development process to enhance usability.

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How familiar are you with cloud infrastructure in mobile development?

Talk about your experience with cloud services that enhance mobile apps, such as data storage, processing, and analytics. Share instances where you leveraged cloud technology to optimize app performance or scale user engagement.

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What tools do you prefer for mobile app testing, and why?

Share the specific testing tools you utilize and the rationale behind your choices, such as promoting thorough testing practices and ensuring quality assurance for your applications. Highlight experiences that demonstrate your thoroughness in testing.

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Why do you want to work at adjoe?

Express your admiration for adjoe's innovative technology and impact in the mobile advertising space. Emphasize your passion for working in a collaborative, forward-thinking environment, and how your personal and professional aspirations align with the company's objectives.

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March 29, 2025

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