# Senior iOS Developer (f/m/d) at adjoe

> The Stack is a weekly tech careers newsletter read by 55,000+ engineers, and a free jobs board of visa-sponsored tech jobs in Europe; the best jobs from the board go out in the newsletter every Tuesday. This is one job from the board.

> Responsibilities: - Design, develop and maintain production-

- **Company:** adjoe (https://jobs.trythestack.co/companies/adjoe)
- **Location:** Hamburg, Germany
- **Work arrangement:** Remote
- **Employment type:** Full-time
- **Experience level:** 5–10 years
- **Visa sponsorship:** Offered, according to the listing
- **Key skills:** Swift, iOS SDK Development, SwiftUI, Modern Concurrency, Clean Architecture, CI Pipelines, Automated Testing, Kotlin, React Native, Flutter, Unity, AdTech
- **Posted by employer:** 2026-05-29
- **Added to The Stack:** 2026-06-05
- **Status:** May no longer be active (posted more than 60 days ago)
- **Apply:** https://jobs.ashbyhq.com/adjoe/341825ea-508a-4f17-b2e1-4161f934fdff (the employer's own application page)
- **Human page:** https://jobs.trythestack.co/jobs/senior-ios-developer-fmd-adjoe

## About the role

Responsibilities:
- Design, develop and maintain production-grade native iOS SDKs in Swift optimized for fast initialization and minimal binary overhead.
- Own end-to-end feature delivery: spec implementation, API design, testing, and rollout.
- Identify and handle platform edge cases at scale (memory, lifecycle, concurrency) and optimize performance.
- Build testability into the SDK, author automated tests and integrate them into CI pipelines.
- Collaborate with backend, cross-platform and mobile teams to ensure consistent APIs and integrations (Unity/Flutter/React Native wrappers).
- Keep the SDK up-to-date with iOS framework changes and propose/implement improvements.
- Mentor peers and contribute to architecture and quality discussions.

Requirements:
- 5+ years iOS development experience and a CS degree or equivalent practical experience.
- Proven experience building and maintaining production SDKs used by large user bases.
- Deep knowledge of Swift, SwiftUI, modern concurrency, iOS lifecycles and clean architecture principles.
- Strong skills in performance tuning, memory footprint reduction, and binary size optimization.
- Experience with automated testing, CI systems and observability for mobile code.
- Cross-platform exposure (Kotlin, React Native, Flutter, Unity) and AdTech experience are strong pluses.
- Willingness to relocate to Hamburg supported by company relocation assistance.

## Responsibilities

Develop and maintain native iOS SDKs that power rewarded advertising for millions of users. Own feature development and iOS specification implementation end-to-end while ensuring minimal binary overhead.

## Requirements

Requires 5+ years of iOS development experience with a focus on production SDKs and a degree in Computer Science or equivalent. Must possess deep knowledge of the iOS platform, including SwiftUI and modern concurrency.

## FAQ

- **Is this Senior iOS Developer (f/m/d) role still open?** It was posted on 2026-05-29. Listings more than 30 days old may no longer be active, so check adjoe's site before applying.
- **Does adjoe offer visa sponsorship?** This listing is marked as offering visa sponsorship. Eligibility rules are set by the employer, so check the details on adjoe's site.
- **Where is this role located?** The listing gives the location as Hamburg, Germany. It is marked remote.
- **What skills does this role ask for?** The listing names: Swift, iOS SDK Development, SwiftUI, Modern Concurrency, Clean Architecture, CI Pipelines, Automated Testing, Kotlin, React Native, Flutter, Unity, AdTech.

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## Notes for agents

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