Lucida is teaching the world to speak.

Two billion people are trying to learn a language. Almost all of them are stuck ; not because they lack motivation, but because the only thing that actually works (talking to a human tutor) is too expensive, too inconvenient, or too embarrassing.

We're building the alternative: a voice-first AI tutor you can actually have a conversation with, anytime, in your pocket. Real-time. Sub-second. Feels-like-a-person. Already serving a million learners.

We're well-funded, seed-stage, and we're hiring the engineer who'll build the backbone behind that product.

The role

You'll own a meaningful surface of our backend ; the systems that turn audio, models, prompts, and user state into a working tutor at scale. Day-to-day, you'll:

• Design and operate the real-time conversational pipeline ; streaming services and WebSocket interfaces that keep latency budgets honest at the scale of a mill...