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Hiya is building trusted calling experiences for businesses and consumers. The Spam Blocker product is a consumer mobile app that identifies unknown callers, blocks spam and scams, and screens suspicious calls—operating at the intersection of mobile platforms, real-time calling, and Hiya's global reputation and security systems.
The team is small and owns Spam Blocker end-to-end, from native apps and backend services to subscriptions, entitlements, and releases. Engineers move fluidly between Swift, Kotlin, and backend work depending on product needs. This is an AI-native team where coding agents handle much routine implementation; part of the role is deciding where they create leverage and building tools and guardrails for safe shipping.
As Senior Mobile Engineer, you will design, build, and ship features across iOS and Android apps, including required backend changes. You'll own releases from cut to store on both platforms and extend release automation to reduce manual effort and catch issues earlier. You'll build tests, instrumentation, and review gates that enable a small team to ship high quality without manual QA. You'll drive architecture decisions on mobile codebases and see them through adoption. You'll collaborate with product and design on what to build and bring a point of view on whether features should ship. You'll use coding agents strategically and improve workflows that let the team ship safely with them.
Hiya values ownership, transparency, and autonomy. You'll work through ambiguity, weigh tradeoffs, take responsibility for results, and maintain a high bar for quality and customer trust. The company has been recognized by Built In, GeekWire, Comparably, G2, Forbes, and Deloitte Technology Fast 500 for culture, innovation, and leadership.
REQUIREMENTS:
- Demonstrated Kotlin Multiplatform (KMP) experience in production applications, specifically shipping shared KMP code or deciding where shared boundaries belong
- Production code shipped outside your primary platform in the last two years (iOS, backend, or web) that you can demonstrate; shipping on both iOS and Android is a strong plus
- Experience carrying a significant architecture or platform change through a mobile team, from proposal through adoption, including bringing other engineers along
- Comfort with services behind the app: APIs, entitlements, analytics; you don't wait for backend engineers to unblock mobile features
- High quality bar with automation as default; you build automation around repeatable failure modes and use device testing deliberately
- Active use of AI coding agents; you separate planning from execution on non-trivial work and can articulate what has worked, what hasn't, and where you draw the line on trusting agent output
- Clear written and verbal communication; you write clear PRs and design notes and flag blockers early
- Pragmatic judgment; you make sensible tradeoffs between speed and quality and can explain your reasoning
STRONG PLUS:
- Experience with Compose Multiplatform
- Experience with CallKit or Android telecom framework
- Experience building companion experiences for CarPlay, Android Auto, watchOS, or Wear OS
- Experience with in-app subscription platforms such as RevenueCat
- Experience with mobile CI/CD and release tooling such as Bitrise or Runway
