Senior Mobile SDK Engineer
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Job Description
Senior Mobile SDK Engineer building Unity-integrated iOS and Android SDKs. Powering a global loyalty platform that helps mobile gamers discover games, connect, and earn rewards.
Responsibilities:
- Design and develop a reliable SDK for integration into Unity-based mobile games and applications
- Build and maintain native SDK components for iOS and Android together with the Unity integration layer
- Define SDK architecture, public APIs, integration patterns, and communication between Unity and native mobile components
- Own the SDK lifecycle from initial design and implementation through packaging, release, monitoring, and ongoing support
- Ensure compatibility across Unity versions, iOS and Android versions, devices, and customer environments
- Collaborate with the Mobile Lead and other engineers on technical decisions and implementation
- Proactively identify technical risks and recommend practical solutions without requiring close supervision
Requirements:
- 5+ years of professional software development experience
- Strong hands-on experience developing mobile SDKs used within Unity applications
- 3+ years of relevant Unity SDK development experience
- 2+ years of native mobile development
- Strong understanding of Unity and the integration between Unity/C# and native mobile code
- Professional experience with native Android development using Kotlin
- Professional experience with native iOS development using Swift
- Understanding of mobile application lifecycles, performance considerations, threading, and debugging
- Previous experience leading or taking substantial ownership of an SDK initiative is highly preferred
- Strong communication skills and ability to explain technical decisions clearly
- High level of ownership, internal motivation, and ability to work independently
Benefits:
- Security through careful client vetting to minimize risks and ensure reliability and timely payments
- Career support and assistance finding new opportunities if a project is not the right fit
- Legal assistance with independent contractor or sole proprietorship status, taxes, and related processes
- English courses
- Professional growth opportunities
- Team-building events
- People-first management with minimal bureaucracy
- Friendly company culture
- Flexible working hours
- 29 days of PTO (18 working days per year plus all national holidays)
- 10 paid recovery days
- Full financial and legal support for independent contractors
- Free English classes with native speakers or Ukrainian teachers
- Dedicated HR support
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