Senior Mobile Platform Engineer

This is a fully remote position, open to applicants in Egypt.

📋 Description

• Create the public API for the SDK on the main platform by adhering to idiomatic platform conventions.

• Establish feature contracts, which include core event and command variants, the design of the public API, and conformance vectors.

• Develop features within the Rust core and shell executors, taking ownership of all merged code.

• Convert OS lifecycle behaviors into SDK behaviors throughout scene phases, process death, background limitations, push wake-ups, connectivity alterations, and app extensions.

• Construct and oversee the coordinated release pipeline for XCFramework, AAR, npm packages, and sample applications, including signing, symbols, SBOM, and privacy manifest.

• Execute consumer test matrices across Xcode, AGP, R8, ABI filters, React Native, Expo, Vite, webpack, and Next.js configurations.

• Manage merchant tickets on a rotation basis by triaging issues, replaying diagnostics bundles, implementing fixes and platform tests, and releasing patch updates.

• Deliver platform-specific add-ons such as rich push notifications, in-app campaign UI, Android Binder service, FCM forwarding, App Attest, and Play Integrity.

• Ensure observability through structured logs, correlation IDs, metrics callbacks, stable error codes, diagnostics(), and selfCheck().

• Monitor annual changes to OS, Xcode, AGP, and React Native and apply updates proactively to prevent merchant issues.

• Author ADRs, changelogs, migration notes, and integration documentation.

⛳️ Requirements

• Over 7 years of software engineering experience, with at least 2 years focused on a library, SDK, framework, or platform utilized by third-party developers.

• Extensive experience in public API design and Semantic Versioning (SemVer), including the ability to manage deprecations without disrupting existing customers.

• Profound knowledge of mobile platform lifecycles, covering aspects such as process death and restoration, background execution limits, push wake-ups, extensions, and platform services.

• Practical experience with native build systems and packaging, which encompasses publishing to package registries and resolving third-party build issues.

• Familiarity with FFI and language interoperability, including JNI/NDK on Android, C interoperability with Swift, or another production-released language boundary.

• Background in supporting third-party integrators through documentation, technical assistance, troubleshooting, and analyzing symbolicated crash reports.

• A strong testing mindset; familiarity with property-based or mutation testing is advantageous.

• Exceptional technical writing abilities, encompassing ADRs, changelogs, migration guides, and developer documentation.

• Proficient in reviewing code for both Android and iOS, identifying lifecycle, concurrency, and threading issues.

• Significant experience with AI-assisted development and coding agents, including thorough reviews, validations, and explanations of AI-generated code prior to production.

• Experience in shipping and maintaining an iOS library/SDK distributed via SPM or CocoaPods.

• Production experience with Swift 6 concurrency features, such as actors, Sendable, and structured concurrency.

• Experience in building or maintaining app extensions, preferably a Notification Service Extension.

• Practical experience with XCFrameworks, code signing, dSYMs, and privacy manifests.

• Background in shipping and maintaining an Android library/SDK distributed through Maven Central.

• Familiarity with consumer ProGuard/R8 rules and JNI/NDK, including packaging native libraries across ABIs.

• Production experience with Android lifecycle management and background execution, including process death, Doze, background restrictions, and WorkManager.

• Strong proficiency in TypeScript, including at least one published npm package.

• Experience in building React Native native modules utilizing the New Architecture.

• Minimum AI proficiency Level L5: advanced skills in AI-assisted software development for coding, code review, testing, debugging, and optimization.

• Hands-on experience with Claude Code, including skill files, commands, and structured prompts.

• Knowledge of context separation and sub-agents, and when to implement them for complex or parallel tasks.

🏝️ Benefits

• Competitive salary and bonus structure.

• Unifonic share scheme (we are all owners!).

• 30 vacation days following the first anniversary.

• A day off for your Birthday!

• Opportunity to work remotely for up to 25 days per year from any location worldwide!

• Paid leave for new parents.