Senior iOS Developer (f/m/d)

adjoe is redefining the future of mobile ads. Powered by advanced AI, first-party data and world-class engineers, we’ve perfected the offerwall experience for monetizing and scaling app publishers with solutions like Playtime and Arcade – now the fastest growing rewarded advertising channel globally – driving incremental engagement, retention, and revenue. At the same time, we’re breaking into programmatic advertising with the intelligent bidding system of adjoe Ads. Together, this ecosystem connects app developers to over 600 million users worldwide for scalable growth. Backed by a $100 million investment from Bertelsmann and operating from offices in Hamburg, Boston, Singapore, and Tokyo, adjoe is defining the next stages of app and ad experience – right now. Join us.

MEET YOUR TEAM: PROGRAMMATIC SOLUTIONS

The Programmatic Solutions team powers adjoe's real-time ad network solution integrated with leading mobile mediation platforms on both Android and iOS. Our focus lies in building adjoe's own Ad Network– a smart bidder leveraging machine learning to optimize campaign performance by predicting conversion probability and lifetime value in real time.

The team is responsible for both the adjoe Ads platform that decides which ad to display and our Android/iOS SDKs that render these ads and provide tracking events to the backend.

We've also developed tools through which app publishers can manage their integration, analyze monetization performance, and assess ad user experience through dashboards and APIs.

For potential teammates across all disciplines, working in the Programmatic Solutions team means applying your problem-solving skills in adjoe's advanced programmatic ecosystem where milliseconds directly impact both revenue and relevance.

Our iOS Tech Stack

• Xcode, Swift, Objective-C, Cocoapods, SPM, UIKit, AVFoundation, WKWebView, Xcode Instruments, XCFramework
• ...and we’re always open to new technologies & tools that will benefit the product.

What You Will Do

• Develop the adjoe Ads SDK by creating new features and innovative ad formats. The views you build will be seen by billions of mobile users all over the world every day.
• Introduce innovative UX/UI features for A/B testing to enhance product KPIs and overall user experience.
• Implement mechanisms to improve the technical stability, performance, and maintenance of adjoe Ads SDK. Your goal is to make it as easy and smooth as possible for app developers to integrate and utilize adjoe’s technologies.
• Use your system design knowledge to come up with the optimal solutions compatible with different frameworks and our backend.
• Align with advertising industry standards & best practices to keep our product up to date.
• Contribute to our CI/CD pipelines to efficiently and effortlessly distribute our SDK to thousands of app developers.
• Enhance our monitoring system to proactively detect potential issues and maintain system health.

Who You Are

• You have 5+ years’ work experience as a mobile developer working with Swift.
• You have hands-on experience with developing iOS libraries and SDKs.
• You keep up to date with trends in mobile development and are aware of UX & UI best practices.
• You have experience with build/deployment tooling (such as CocoaPods, SPM, fastlane, GitLab CI).
• Plus : You have basic knowledge of Objective-C.
• Plus : You have knowledge of React Native (JavaScript), Unity (C#), Flutter (Dart) or similar cross-platform development frameworks
• Plus : You have Android development experience as well.

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 skillset 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.