We are not your average SF startup. We’re a diverse team of 20 people - hailing from 9 countries and speaking 9 languages with a range of non-traditional backgrounds.

We are not a remote-first zoom culture: We value the energy of solving hard problems on a whiteboard in our SF HQ.

We are not “researching to learn”: Research and product move in tight, high-velocity loops. If it doesn’t become code to solve a customer problem, it doesn't exist.

Anchor Days: We’re in the SF HQ (SoMA) 3 days/week (Mon, Tues, Thurs) to solve hard problems together.

Core Collaboration Hours: We’re online 9-11am PT daily so the whole team (SF ↔ UK) can collaborate in real time.

Deep Work: Outside of that, we protect uninterrupted time to build.

Multi-Agent Systems Architecture: Design and implement agentic systems, rather than prompt chains, at scale. You’ll define agent topologies, robust orchestration layers, structured state management, persistent and scoped memory, tool-use registries and execution, and build structured, inspectable systems. You’re building a long-running harness-based agentic platform, not wiring together LLM API calls.

Behavioral & Persona Modeling: Simulate user archetypes with goal-directed behavior. You’ll design data-grounded personas, enable “computer-use” on real interfaces, and develop agents with critique and reflection loops. You’re producing measurable, actionable behavior.

Evaluation & Prompt Engineering: Design prompt schemas and reasoning templates as integrated systems. You’ll build frameworks that measure behavioral fidelity and failure modes, and implement automated and HITL feedback. If it can’t be measured, it doesn’t ship.

Signal & Insight Systems: Build systems that transform raw agent outputs into high-signal insights. You’ll cluster observations across runs, implement severity scoring, and map behavioral signals to product decisions. Turn noisy outputs into decisions.

Production Reliability: Build the infrastructure to operate agents in production. You’ll implement tracing, attribution, and cost monitoring, detect failure modes and design fallbacks, circuit breakers, and evaluation pipelines. The bar is production reliability.

The People: Join a global team of founders, engineers, researchers, and adventurers obsessed with human behavior - we’re curious, willing to be wrong, and privileged to be solving hard problems at the frontier.

The Problem: Deep science with real impact. We leverage behavioral modeling, cognitive science, and cutting-edge AI to solve real product challenges for real customers.

The Velocity: Ship fast and learn faster. Work directly with customers and see the impact of your work in hours, not weeks or months.

The World-Class Backing: Backed by MaC VC, Protagonist, Weekend Fund and scouts at a16z, along with a team of Stanford and MIT researchers and leaders from Discord, Airbnb, and Google.

The Member Of Staff Philosophy: You don’t care about titles - you value extreme ownership.

Systems, Not Prompts: You prioritize state machines, orchestration layers, and tool-use contracts over prompt hacking. You build for reliability, inspectability, and improvability - you’re uncomfortable with “it just works sometimes.” If it can’t be measured, it doesn’t ship.

Production Experience: You have 5+ years building complex software and 2+ years shipping agentic LLM systems. You’ve built harnesses where agents manage tool selection, error recovery, and multi-step execution autonomously in production environments that run, break, and evolve.

Orchestration Systems: You’re experienced with multi-agent orchestration, sandboxed execution, and complex backends. You optimize for coordination, scoped memory & context, and how agents degrade gracefully under pressure.

Python Mastery: You’re an expert in async programming and structured data modeling (Pydantic), building maintainable, scalable systems designed for extensibility.

Fast, Iterative Builder: You thrive when research and product move together. You’re comfortable shipping quickly, learning from real users, and refining systems in tight loops.

High Ownership, Low Ego: You take responsibility for what you build. You’re willing to be wrong, change your mind, and prioritize being effective over being “theoretically right.

Comfortable at the Frontier: You’re excited by ambiguous problems. You’re not waiting for best practices - you’re helping define them.

Product Intuition: You prioritize signal over noise because outputs matter. You care that what you build helps someone make a decision.

All Backgrounds Welcome: Some of us are dropouts, some have PhDs. Some are tech veterans, some are first-timers. What matters - how you think, how you build, and how you work in teams.

Salary: $180-250k/yr + meaningful equity upside

Health: 100% paid medical, dental & vision

PTO: 28 days (including stats) that we all take (including our founders)

Environment: Beautiful office in SoMa, fully stocked, and optimized for deep work

WFH: 2 days/week (Wed & Fri) to catch up on laundry, save time commuting, and let your cat walk across the keyboard

Adventures: 2 annual offsites (we’re back from Las Vegas and planning something fun in Sept), plus we host regular team dinners and events in the city