Staff Full-Stack Engineer

Stealth AI Startup; San Francisco (CA); Remote; USD 140,000 - 220,000; Full time

Job summary

Join a leading stealth AI startup founded by MIT engineers as a Staff Full-Stack Engineer. You will take ownership of critical technical decisions, leading the architecture and development of scalable applications in a fast-paced environment. Collaborate closely with a passionate team to drive impactful AI-driven features that will be used by millions globally, all while enjoying a fully remote position with flexible hours.

Benefits

Flexible hours

Accelerated path to tech leadership

Qualifications

• 5+ years building and deploying scalable full-stack systems.
• Proven ability to operate autonomously in fast-paced startup environments.
• Driven by impact and comfortable with rapidly changing technical requirements.

Responsibilities

• Leading architecture and development of scalable applications.
• Rapidly prototyping AI-driven features in collaboration with ML engineers.
• Owning projects end-to-end from ideation to optimization.

Skills

Technical decision-making

Strong communication

Ownership

Rapid iteration

Job description

We’re an early-stage stealth AI startup founded by MIT engineers—privately funded, technically ambitious, and determined to lead in frontier conversational AI. Our technology is built to directly rival platforms like Character.ai, and we’re looking for a Staff Full-Stack Engineer to help shape our core architecture, scale aggressively, and impact millions of users globally. You’ll join a lean, driven team committed to technical excellence, autonomy, and rapid growth.

You’ll have direct ownership over critical technical decisions, architecture, and implementation. You will rapidly build, iterate, and ship key features, working closely with our founding team to scale a world-class conversational AI product to millions of users. Your responsibilities include:

• Leading architecture and development of scalable, product-ready applications.
• Rapidly prototyping and iterating AI-driven features in close collaboration with ML engineers.
• Owning projects end-to-end, from ideation and implementation to deployment and optimization.
• 5+ years building and deploying scalable full-stack systems.
• Proven ability to operate autonomously in ambiguous, fast-paced startup environments.
• Strong technical decision-making, excellent communication, and a clear sense of ownership.
• Driven by impact, eager to iterate quickly, and comfortable navigating rapidly changing technical requirements.

Why Join Us

• Collaborative, passionate team.
• Fully remote (for now), flexible hours.
• Accelerated path to tech leadership.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Engineering and Information Technology

• Industries

  Technology, Information and Internet

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