Demo

AI Product Engineer

Tacit
San Francisco, CA Full Time
POSTED ON 1/7/2026
AVAILABLE BEFORE 2/5/2026

We are looking for a full stack AI product engineer to turn whiteboard ideas into magical, user‑facing products! You’ll be working on core product: crafting the apps, interactions, and services that ship on our devices and companion clients.


We are an early-stage, stealth tech startup based in San Francisco, developing innovative hardware that rethinks human-computer interaction. While we can’t reveal too much just yet, our team is tackling cutting-edge engineering challenges to bring revolutionary products to life.


What You’ll Do:

Own the product stack (Rust, Swift, K8s/Self-hosted) that powers voice dictation, agent execution, and real-time interactions across wearable hardware, desktop, web, and mobile.

Build agentic workflows: intent understanding, tool/function calling, action execution, and feedback loops that feel fast and reliable.

• Design and prototype voice-first UX (wake words, push-to-talk, streaming partials, editing, confirmations, error recovery) and polish until it feels like magic.

• Build apps that turn raw sensing of speech outputs into useful actions (compose messages, navigate apps, run commands, control tools).

• Implement guardrails and observability for agents (permissions, “are you sure?” moments, logging, replay, evaluation, and debugging).

• Own project requirements and deliver high-quality results.

• Address bugs, optimize for latency and reliability, and ensure system stability under real-time constraints.


Requirements:

• Proficiency in Rust, Swift, AWS, Linux.

• Have shipped multiple 0→1 products or ambitious side projects that real people use. Bonus points if involving real-time voice, streaming UX, or automation.

• Experience building or integrating LLM-powered applications (agent frameworks, tool calling, retrieval/context, evals/telemetry, prompt/versioning).

• Independent work ethic, flexibility, and resourcefulness.

• Effective communication and collaboration skills.

• Comfortable in a fast moving startup environment; excited to build independently.


Additional Qualifications:

• Strong product instincts and UX taste—especially around voice-first interaction design.

• Experience with real-time systems (streaming audio, partial ASR, low-latency UIs, websockets/gRPC).

• Familiarity with desktop automation or system integrations (macOS/Windows hooks, accessibility APIs, browser extensions, device services).

• Experience with data visualization tools or libraries.

• 2 years of experience in a Software Engineering role and a Bachelor’s degree or higher in a relevant field.


Details:

• This position is full time, on-site in San Francisco (SOMA)

• Company size: 20-30 people

• Base Salary: $120,000-$180,000 (with additional equity package)

Salary : $120,000 - $180,000

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