> Markdown version of [/jobs/ext/368583-senior-ios-developer](https://www.wearedevelopers.com/jobs/ext/368583-senior-ios-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior iOS Developer - **Company:** adjoe GmbH - **Location:** Hamburg, Germany - **Experience:** Expert - **Contract:** Permanent contract - **Skills:** Flutter, Unity 3d, Application Programming Interfaces (APIs), Apple IOS, JIRA, Automation of Tests, Continuous Integration, Amazon DynamoDB, Swiftui, Concurrency, Ios Frameworks, Kotlin, React Native - **Published:** June 4, 2026 - **Apply:** https://de.indeed.com/viewjob?jk=5544b39df57081cc ## About the Role Do you have experience in iOS development? ## Description On the client side,our technology performs smoothly across 20 million daily SDK initializations. We build native Swift and Kotlin SDKs optimized for ms initialization and minimal binary overhead, with Unity, Flutter, and React Native wrappers that provide a unified API across the entire mobile ecosystem. Behind the scenes, a high-throughput Go and DynamoDB architecture handles the real-time state synchronization of millions of concurrent sessions. When your code runs on nearly one out of every seven smartphones on Earth, every millisecond of execution and every byte of memory counts., * Swift expert with SDK experience. You have 5+ years as an iOS developer with a CS degree or equivalent, and have built and maintained production SDKs before. At adjoe, you'll be developing native iOS SDKs that run on millions of iPhones daily, owning feature development and iOS specification implementation end-to-end. * Deep iOS platform knowledge. You have a thorough understanding of iOS; SwiftUI, modern concurrency, clean architecture principles, and service lifecycles, not just the happy path, but the edge cases that only surface at scale across hundreds of millions of monthly active users. * Quality is part of your workflow. You work closely with QA to develop and maintain automated testing strategies through CI pipelines. You don't hand off to QA, you build testability from the start. * Stays current with the iOS ecosystem. You follow iOS framework evolution closely and actively bring new capabilities into the SDK when they're relevant. You know what changed in the latest iOS release and have an opinion on whether it matters. * Cross-platform exposure is a plus. Experience with Kotlin, React Native, Flutter, or Unity helps when working across a mobile team that spans the full ecosystem. AdTech industry background is a strong plus. 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 770M 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 that learn from each other. + Have Fun. 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