adjoe builds the technologies behind mobile apps growth and monetization. Powered by advanced AI, first-party data, and world-class engineering, we connect app developers to over 600 million users worldwide. From our global leadership in rewarded advertising with Playtime to breaking ground in programmatic adtech with adjoe Ads, we build high-performance mobile infrastructure that redefines how users discover and engage with apps. Where Milliseconds Power Global Programmatic Scale The Programmatic Solutions team powers adjoe’s real-time ad network solution, directly integrated with leading mobile mediation platforms across the ecosystem. At our core is a smart bidder leveraging machine learning to predict conversion probability and lifetime value in real time, serving the right ad at the exact right moment. The team owns the complete lifecycle of our programmatic ad engine on mobile: from our native iOS and Android SDKs that seamlessly render ad creatives and stream granular telemetry events back to our servers, to the developer-facing APIs and dashboards that give publishers total visibility into monetization performance. Because our code executes live inside third-party apps alongside major mediation stacks, every millisecond saved directly impacts revenue, fill rate, and user experience. Your Mission & Who We Are Looking For: - Swift expert with deep SDK experience: You bring 8+ years of mobile development experience with a strong focus on modern Swift, alongside proven experience architecting, building, and maintaining production iOS libraries/SDKs. You know how to design clean, backward-compatible public APIs and package robust binaries (XCFrameworks) that thousands of external publishers can integrate with zero friction. - High-performance rendering & creative UI/UX: You will build and optimize the visual components of adjoe Ads—innovative ad formats, dynamic video players, and rich web views seen by millions of users daily. Leveraging UIKit, AVFoundation, and WKWebView, you know how to build fluid, native-feeling experiences, introduce A/B testable UI features, and diagnose frame drops or memory leaks using Xcode Instruments. - Mediation integration & AdTech standards: You will ensure our SDK seamlessly interfaces with leading mobile mediation platforms and ad servers. You take ownership of aligning our mobile stack with IAB specifications and advertising industry standards, ensuring reliable impression tracking, viewability measurement, and attribution. - Build automation & developer-facing distribution: You contribute to and maintain our CI/CD pipelines to guarantee flawless, automated releases. You have hands-on experience with modern dependency managers and build automation tools (Swift Package Manager, CocoaPods, fastlane, and GitLab CI) to package, test, and distribute lightweight mobile artifacts. - Observability & technical stability: You don't just write code; you safeguard its execution in the wild. You will expand our monitoring and crash-reporting frameworks to proactively catch anomalies, optimize memory and CPU footprint, and ensure zero instability across diverse iOS versions and device generations. - Plus – Cross-platform & multi-stack exposure: Basic working knowledge of Objective-C is a strong advantage. Experience with cross-platform frameworks (React Native, Flutter, Unity) or parallel Android development experience is highly valued to support our broader mobile ecosystem. 🌎 We welcome applications from talent worldwide and provide relocation support to Hamburg, Germany for those ready to join our team. What’s in It for You? At adjoe, you’re not here to just close JIRA tickets; you’re helping build the infrastructure behind one of the most impactful platforms in adtech. The systems you work on will reach hundreds of millions of users and power billions of decisions every day. - Go Big. Own projects with impact on 600M+ users and push adtech boundaries. - Move Fast. Ship solutions multiple times a day, learn from results, and keep momentum. - Be Direct. Solve problems openly and collaborate across teams. - Thrive Together. Grow with a diverse, global team of people from over 40 different countries who learn from each other. - Have Fun. Celebrate wins, enjoy daily victories, and bring your energy. We welcome applications from people who will contribute to the diversity of our company.

Senior iOS Developer (f/m/d).

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