Senior iOS SDK Engineer (Remote: Europe)

Job Purpose:

We’re looking for a Senior/Staff iOS Engineer with strong experience building public-facing SDKs to join our team. You’ll work on high-scale, performance-critical components used by thousands of developers, shaping the next generation of our mobile SDK architecture.

• Build and maintain a clean, robust public API surface with strong backward-compatibility and versioning discipline.

• Work hands-on with Swift and Objective-C, including mixed-code environments and safe migration patterns.

• Improve our event pipelines: batching, offline storage, retries, backoff, crash safety, and performance.

• Enhance low-level components: crash handling, signal/Mach exceptions, hang detection, logging, and instrumentation.

• Collaborate across Android, RN, Flutter, and Backend teams on unified behaviors and data contracts.

• Identify bottlenecks using Instruments and ship optimizations with measurable impact.

• Write reliable unit, integration, and scenario tests to ensure stability in a wide range of host-app conditions.

• Participate in technical design reviews, RFC discussions, and architecture decisions.

• Improve developer experience through documentation, samples, and clarity of APIs.
  

Job Requirements:

• 7+ years of professional iOS experience

• 3+ years building and maintaining an iOS SDK (analytics, crash reporting, payments, or similar).

• Familiarity with symbolication/dSYMs, stack unwinding, or binary formats.

• Strong knowledge of Swift, Objective-C, and the iOS runtime.

• Deep understanding of app lifecycle, background modes, memory management, concurrency, and thread safety.

• Experience with public SDKs, including versioning, API design, and handling customer edge cases.

• Solid expertise in networking: URLSession, retries, async flows, caching, connection management.

• Strong debugging skills with Instruments, OS logs, crash logs, and performance tools.

• Hands-on with Core Data or SQLite.

• Experience working with CI/CD for SDKs (SPM, Cocoapods, XCFrameworks).
  

• Knowledge of cross-platform SDK ecosystems (React Native, Flutter).