About the role
We’re looking for a hands-on Senior Android App Developer to lead development of our Androidc application that delivers near real-time, voice-to-voice translation. You’ll own core client features—from FaceTime-like calling and live captioning to buttery-smooth UI animations—and collaborate closely with our iOS developer, designer, and product team members to ship a high-quality, low-latency experience. Experience with Kotlin and working independently on an Android project from scratch is required. AV/WebRTC experience is a plus.
What you'll do
1. Build major app features in Android
- Auth
- Audio/video calling
- Onboarding flow
- Growth features
- Consecutive translation
- Conversation translation
2. Real-time media & low latency
- Integrate with our real-time translation backend and media pipelines
- Work with WebRTC, handle audio routing, interruptions, and seamless crossfades from original to translated audio
3. Performance, reliability, and quality
- Optimize connection time, frame budget, memory, and jank
- Instrument crash/error reporting; build resilience for poor networks and Backgrounding
4. Instrumentation & growth
- Add analytics, deep-links, and attribution (e.g., PostHog, Branch or equivalents).
- Support A/B experiments, notifications, and “call non-users” funnels.
5. Platform collaboration
- Port iOS modules in Swift to Kotlin with maintainability consideration in mind
- Partner with backend team on streaming APIs, caption timing, and voice Pipelines.
6. Security, accessibility, and internationalization
- Implement privacy-first features, localization/i18n, and accessible UI.
Qualifications
- 5+ years building and shipping consumer-grade mobile apps; 3+ years with Android
- Demonstrated ownership of a major app or feature used by real customers (Play Store)
- Strong UI/UX instincts with animation
- Experience integrating real-time or streaming features (sockets, WebRTC)
- Comfortable porting iOS to Android
- Fluency with mobile CI/CD, OTA updates, crash reporting, and performance tooling
- Excellent product judgment, collaboration, and communication; thrive in fast- paced, in-person startup environment
- Start-to-finish launch experience for a high-quality mobile app
Preferred Experience
- WebRTC
- Android FCM
- Android media
- Live captions, speech recognition, local VAD
- Analytics/attribution (PostHog, Branch or alternatives), deep linking, and
- growth experiments
- Localization/i18n, accessibility, and app security best practices