Full stack engineer

We are building a female-focused AI voice companion + AI livestream mobile app. The app is voice-first and emotion-first (no 3D avatars or animations). Livestream features are similar to Bigo Live: gifts, coins, intimacy levels, and badges.
Responsibilities:
* Lead development of the MVP (React Native + backend).
* Design and implement core architecture (AI voice chat, livestream room, payments).
* Integrate ASR (speech-to-text), TTS (emotion-aware), and LLM APIs.
* Build scalable backend services for user accounts, gifts, intimacy/levels, and payments.
* Ensure low-latency live interactions.
* Set up infrastructure, CI/CD, and testing framework.
* Write clear documentation for future engineers.
Requirements:
* Strong experience with React Native (Expo or bare workflow).
* Backend expertise in Node.js/TypeScript (NestJS preferred) or Go.
* Knowledge of real-time communication (WebSockets, RTC/RTMP).
* Experience with ASR/TTS APIs and AI integrations.
* Database design (relational DB + Redis).
* Familiar with cloud deployment (AWS/GCP/Azure).
* Good communication skills and ability to work independently.
Nice to Have:
* Prior work on livestream or social apps.
* Experience with payment integration (Apple/Google IAP).
* Familiarity with scaling apps from 1k DAU to 50k DAU.
Compensation & Engagement:
* Competitive pay (negotiable based on experience).
* Remote work.
* Long-term role: you will be the AI Architect / core engineer; future team will build on your structure.
How to Apply:?Please send:
1. Your CV / portfolio.
2. Examples of relevant apps or projects you have built.
3. Any questions or assumptions about the project after reading this JD.