Fullstack Engineer

Build from 0 to 1 across our stack. Build the best search engine for your life’s data. Create delightful, magical user experiences. Highly collaborative, no bureaucracy, just shipping.

You'll work directly on high-impact engineering problems across:

• Our state-of-the-art memory + agent architecture.
  • Build the best user simulation tech: mirror cognition, writing style, and memory.
  • Build the platform to create and operate the agentic version of you.
• Front-end product engineering.
  • Build the most beautiful daily-use app of all time.
  • How can Sentience blend into every surface of your life and work?
• The Sentience communication platform.
  • Build the Human and Sentience communication platform. Build the network for humans and their Sentiences to interact.

We don't hold any of these requirements as hard blockers, and you should reach out if you are excited — even if you don't fit any/all of these.

• 3–10 years shipping production software (startups + former founders preferred).
  • If you want to be a founder someday, we want to give you the skills and exposure to do that.
• Deep passion, obsession, spike in anything — video games, music, sports. Tell us what you are uniquely obsessed with.
• Experience (plus deep personal interest) in at least one of:
  Rust, Python, Type Script, React, RAG/Vector
  
  DBs, building an agent with tool calling.
• Use LLMs in all aspects of your dev workflow:
  Claude Code or Cursor power user.
  • Bonus for Vim / Emacs (or equivalent).
• Interest in the human mind, neuroscience, human psychology.
• Fascinated by AI systems/optimizations. Excited about integrating AI research into a product millions of people will use every day.

We benchmark against comparable companies and offer 95th+ percentile cash/equity packages. We offer:

• Full benefits, including the best healthcare we could choose.
• NYC, 5 days in person in our beautiful Williamsburg office.
• All meals comped.
• $200 monthly health stipend for commuting, gym, therapy, or whatever else helps you stay healthy and productive.