Lead AI Engineer
Listed on 2026-01-03
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Software Development
AI Engineer, Machine Learning/ ML Engineer
We are a YC-backed AI startup building the worlds most advanced real-time Speech AI coach used in online calls. Over the past six months weve grown from $100k to $5M ARR raised $2.5M from top-tier investors and assembled a world-class engineering team (ex-Google Nvidia Lyft Amazon) solving hard problems in voice ML and real-time infrastructure.
We are looking for a senior hands‑on engineer to lead development of our real‑time Voice AI Agent and internal ML toolkit . Youll own end‑to‑end systems across real‑time audio applied ML and production deployment working directly with our CEO and CTO.
What Youll DoBuild and scale our Real‑Time Voice AI Agent (Live Kit / WebRTC) :
streaming ASR / TTS VAD diarization state machines session management latency / QoS tuning.
Develop our ML toolkit and ship models to prod (ASR TTS VAD embeddings speaker ).
DSP ffmpeg / decoding ONNX / Tensor
RT reproducible pipelines.
Contribute to backend when needed ( REST / OpenAPI Postgres / Supabase).
Work on applied ML around LLMs : RAG function‑calling routing safety A / B testing.
Design reliable real‑time systems : back pressure retries idempotency batching caching.
Build data workflows : collection cleaning anonymization synthetic data offline / online eval.
Own observability & SLOs :
Prometheus Grafana Sentry tracing alerting.
Deploy and operate infra :
Docker Git Hub Actions Live Kit Cloud Modal / AWS (GPU inference).
Ability to move fast and deliver (high‑intensity startup mindset).
Experience in big tech / strong VC‑backed startups / Yandex / research labs.
Any founder experience (even failed).
Strong engineering fundamentals taste in product & design.
Open‑source contributions ML / algorithms background Kaggle / CF / olympiads are a plus.
A public presence : blog Twitter engineering posts bonus points.
Clear communication and ability to explain complex systems simply.
We do not hire from outsourcing firms Web3 or gambling.
What We OfferHigh‑ownership role with direct impact on product and roadmap.
Work directly with CEO / CTO every day.
Competitive salary meaningful equity (company valued at $20M last year).
Fully async remote any timezone (via Deel).
US visa support (O‑1).
12 global offsites per year (last one Bali).
Clear growth pathcompensation increases with delivered projects.
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