Senior Mobile SDK Engineer (iOS/Android) — Remote-First

GK SOFTWARE AG

Germany (OH)

Remote

USD 102,798 - 148,486

Full time

14 days+

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Benefits offered by this job

Remote-first

Flexible hours

Job summary

GK Software AG is seeking a Senior Mobile Developer (iOS/Android) to shape SDK components and the platform that powers a growing ecosystem of partner and customer apps. You will design APIs, contribute to frontend stack decisions, and work across mobile platforms using Swift and Kotlin.

The role emphasizes code quality, automated testing, and mentoring within an international, cross-functional team. A remote-first culture and flexible hours support work‑life balance while delivering scalable,

Qualifications

Completed studies in computer science or equivalent qualification.
Hands-on experience with Swift and/or Kotlin (Objective‑C/Java experience welcome).
Proven experience building or maintaining an SDK, library, or platform consumed by external developers or partner teams.
Understanding of API design, versioning, backward compatibility, and developer experience.
Strong knowledge of client‑server communication, databases, and web services.

Responsibilities

Design and develop SDK components and modules for iOS and Android used as building blocks by partners and customers.
Define and evolve clean, well-documented public APIs for our SDK.
Contribute to and help shape our frontend stack, including cross‑platform and web technologies.
Work with native iOS/Android SDKs and programming in Swift/Kotlin (Objective‑C/Java legacy knowledge welcome).
Continuously evaluate new technologies, prototype them, and assess their fit for our SDK architecture.
Ensure quality and stability through automated tests, code reviews, and strong engineering practices as the SDK is treated as a product.