Senior Mobile SDK Engineer

About the role

Join a fast‑growing gaming loyalty platform as the first dedicated engineer for its mobile SDK. You will own the end‑to‑end architecture, public API, releases and partner experience, building high‑quality consumer apps for iOS and Android.

Key responsibilities

• Design and implement the SDK, including in‑game placement components, app‑to‑app handoff, deep linking and a persistent referral identifier.
• Develop native bridges for iOS and Android, manage IL2CPP, Gradle and Xcode plugin plumbing, and ensure coexistence with other SDKs.
• Maintain size, cold‑start and frame‑time budgets enforced through CI pipelines.
• Own versioning, distribution via UPM/Asset Store, Unity LTS support and migration paths.
• Create a test surface: sample game, cross‑version build verification, integration tests, debug mode and documentation.

Required profile

• 5+ years of software engineering experience with Unity/C# shipped to iOS and Android.
• Proven experience building or contributing to a library/SDK consumed by other developers.
• Deep knowledge of the Unity mobile build pipeline.
• Comfortable working below C# in Kotlin/Java and Swift/Objective‑C to build bridges and debug platform behaviour.
• Strong profiling discipline and excellent written English.

Required skills

• Unity
• C#
• Kotlin
• Java
• Swift
• Objective‑C
• IL2CPP
• Gradle
• Xcode
• Unity LTS
• UPM/Asset Store distribution

What we offer

• People‑first management with minimal bureaucracy.
• Friendly company culture and flexible working hours.
• 29 days of paid time off plus national holidays and 10 paid recovery days.
• Full financial and legal support for independent contractors.
• Free English classes with native speakers or Ukrainian teachers.
• Dedicated HR support.