> Markdown version of [/jobs/ext/2835788-software-engineer-v-senior-mobile-systems-engineer](https://www.wearedevelopers.com/jobs/ext/2835788-software-engineer-v-senior-mobile-systems-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Software Engineer V - Senior Mobile Systems Engineer - **Company:** Spectraforce - **Location:** Sunnyvale, CA, United States - **Experience:** Expert - **Contract:** Temporary to permanent - **Skills:** Artificial Intelligence, Android Software Development, Apple IOS, Systems Engineering, C++ (Programming Language), Computer Programming, Software Debugging, Memory Management, Machine Learning, Performance Tuning, Software Engineering, System Programming, Multithreading, Large Language Models, Concurrency, Reliability of Systems, Backend, Kotlin, Event Driven Architecture, Wearables, Programming Languages - **Published:** September 10, 2026 - **Apply:** https://diversityjobs.com/main/sendform/8/8/28176/1/18236670?backUrl=%2Fcareer%2F18236670%2FSoftware-Engineer-V-Senior-Mobile-Systems-Engineer-California-Burlingame ## About the Role * Mobile - Experience building mobile products in Kotlin/Swift with distributed backends * Concurrency & Async - Experience in multithreaded, event-driven systems * System Engineering - Architecture design, performance optimization, system reliability improvements Nice-to-have Skills: * Wearables - Experience building wearable products (glasses, watches, MR headsets, etc) * C++/Rust: Proficient system programming in either programming language * AI/ML Engineering - LLM prompt tuning, evaluation, tool calling, and agent workflows Years of Experience: * 10+ years 7+ with NTH skills, open to considering Key Projects/Day-to-Day Responsibilities: * Proficient in Kotlin or Swift, async programming * Design and implement software systems spanning wearable devices, IOS/Android mobile applications, and distributed backend services * Strong understanding of memory management, resource ownership, race conditions and deadlock preventions * Debug race conditions, thread-safety issues, and complex concurrency issues * Optimize CPU, memory, latency and system reliabilities * Verbal and written comms skills ## Related Videos - [Android beyond mobile: Cars, TVs, and Wearables](https://www.wearedevelopers.com/videos/553-android-beyond-mobile-cars-tvs-and-wearables) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Unlocking the potential of Digital & IT at Vodafone](https://www.wearedevelopers.com/videos/602-unlocking-the-potential-of-digital-it-at-vodafone) - [Why Kotlin is the better Java and how you can start using it](https://www.wearedevelopers.com/videos/661-why-kotlin-is-the-better-java-and-how-you-can-start-using-it) - [Why Your Best Mediors Never Become Seniors (And How to Fix It)](https://www.wearedevelopers.com/videos/2108-why-your-best-mediors-never-become-seniors-and-how-to-fix-it) ## Related Articles - [How We Built a Worry-Free System That Runs for 10+ Years – And What We’d Do Again](https://www.wearedevelopers.com/magazine/751-how-we-built-a-worry-free-system-that-runs-for-10-years-and-what-we-d-do-again) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated) - [Highest Paying Tech Companies for Developers](https://www.wearedevelopers.com/magazine/220-highest-paying-tech-companies-for-developers) - [What’s the Difference between a Junior, Mid, and Senior Developer?](https://www.wearedevelopers.com/magazine/238-what-s-the-difference-between-a-junior-mid-and-senior-developer) - [How Much Does a Software Engineer Make? Realistic Software Engineering Salaries](https://www.wearedevelopers.com/magazine/425-how-much-does-a-software-engineer-make-realistic-software-engineering-salaries)