As Head of Mobile, you will lead the development and evolution of a mobile product serving more than half a million users. This role blends deep technical execution with strategic ownership, requiring regular contributions in code alongside high-impact architectural decisions. You'll work directly within the mobile stack, tackling core challenges in real-time communication, particularly around VoIP, SIP, and WebRTC systems.
Key Responsibilities
- Drive the direction and quality of the mobile product, from architecture to deployment
- Write and review production code for both iOS and Android platforms
- Solve difficult engineering problems related to call reliability, latency, and network variability
- Ensure consistent performance across diverse global conditions and device ecosystems
- Integrate and optimize real-time communication features in the app
- Collaborate across systems, contributing to backend services and APIs when necessary
- Ship features rapidly while maintaining stability and scalability
- Deliver solutions that impact millions of users worldwide
What We’re Looking For
- Proven experience building and shipping mobile applications for both iOS and Android over 6+ years
- Hands-on knowledge of VoIP technologies, including practical implementation of SIP or WebRTC
- Strong background in native development with Swift, Kotlin, Java, or Objective-C
- Experience working with React Native or similar cross-platform frameworks
- Familiarity with carrier-level constraints and call quality optimization
- Ability to move quickly without sacrificing code quality or system stability
- Comfort operating in fast-paced, uncertain environments with evolving requirements
- Track record of ownership, demonstrated through shipped products or open-source contributions
Preferred Background
- Experience launching apps in international markets, particularly outside the US
- Understanding of device fragmentation, localization, and regional network differences
- Background in telecom or CPaaS companies
- Startup experience, especially in early-stage product development
- Knowledge of global telephony infrastructure and communication standards
Technology Environment
Our stack includes VoIP, SIP, WebRTC, iOS, Android, React Native, Swift, Kotlin, Java, Objective-C, and backend APIs supporting telephony services. You’ll work across layers to ensure seamless integration between client and infrastructure.
Culture & Work Environment
We value builders who ship early and often, take ownership of their work, and operate effectively amid ambiguity. Engineering decisions are driven by impact and practicality, not process for its own sake. This role is ideal for someone who thrives on solving hard problems and delivering real value at scale.
