Simile
A foundation model for human behavior — 'synthetic users' that predict how people react
Last verified August 17, 2026 · Updated daily
What Simile is building
Simile builds a foundation model for human behavior — think 'synthetic users' you can run experiments on before touching real customers. Companies use 'agentic twins,' generative AI agents grounded in real human interview and behavioral data, to test products, marketing, pricing, or policy decisions on a simulated population before real-world rollout. It ships with a first-of-its-kind confidence model that predicts how accurate each simulation is. CVS built 100,000 AI patient twins from 2.9M records to test pharmacy experiences, replicating in hours what took months. Simile grounds its agents in consented real human data rather than generic LLM personas, which is the fidelity claim it competes on.
Why this matters
Greenoaks (Stripe, Figma, Nubank, Brex) leading a $200M round five months after a $100M Series A is a conviction signal you rarely see. CEO Joon Sung Park is the Stanford researcher behind the landmark 'Generative Agents'/'Smallville' work. The stated mission: simulate all eight billion people on Earth, accurately. Know the key benchmark and its caveat: per Park et al. (arXiv:2411.10109), the generative agents 'replicate participants' responses on the General Social Survey 85% as accurately as participants replicate their own answers two weeks later,' based on agents built from qualitative interviews with 1,052 real individuals — impressive, and exactly the number skeptics will probe.
Open roles at Simile
5 positions we're tracking. Roles are re-checked daily and removed when filled.
GTM Recruiter
First seen last month
Research – Member of Technical Staff
First seen last week
Infrastructure Engineer – Member of Technical Staff
First seen last week
Product Engineer – Member of Technical Staff
First seen last week
Deployment Strategist
First seen last week
Know when Simile is hiring before anyone else
A role stays uncontested for about four days. Here's the window — and where we put you in it.
From $9/month, cancel any time.
Watching Simile
0 applicantsRole spotted & verified
1You get the alert
1You've applied
~8Hits the job boards
250+Hiring outlook
$200M in the bank, 5x revenue growth, and an explicit statement that they're hiring researchers, engineers, designers, and operators. Roughly 9 roles are posted on their Ashby board across SF and NYC. This is a hypergrowth hire-everyone moment with a $2B valuation cushion.
Working at Simile
Simile is A foundation model for human behavior — 'synthetic users' that predict how people react, founded in and now 50-200 people. At this stage, expect defined function but no bureaucracy, you'll own a surface area rather than a ticket queue.
Palo Alto & New York is where most Simile positions are located.
How to actually get hired at Simile
Why applying the normal way doesn't work
Simile has an ATS (Ashby) but the real pipeline is referrals → sourced → recruiter picks → cold apps. You can still get through, but know where you stand.
Who to contact at Simile
What to show them
Demonstrate you can evaluate and validate model behavior, not just train — publications or projects on agent simulation, behavioral modeling, calibration/confidence estimation, or human-data grounding. Reproducing or critiquing the Generative Agents work is a strong opener.
A cold email that works at Simile
What Simile screens for
Citing the 'Generative Agents' paper (UIST '23 best paper) and understanding that Park co-founded this with his Stanford advisors Michael Bernstein and Percy Liang shows real research literacy. Knowing the confidence model exists (not just the simulator) is the deeper signal.
Tailor your CV to the specific Simile role rather than sending a general one. Applications that mirror the language of the job description clear automated filters at a materially higher rate.
Don't make these mistakes
Don't pitch generic 'LLM persona' or 'survey panel' experience as if it's the same thing — Simile's whole differentiation is grounding in real human data, not prompt-engineered personas. Don't ignore the accuracy/validity problem; showing you understand simulation fidelity and confidence estimation is the whole game.
Mistakes that kill Simile applications
Don't send the same CV you sent everywhere else. At 50-200 people it's obvious, and it's the fastest rejection there is.
Lead with their problem, not your ambition. Simile is focused on Greenoaks (Stripe, Figma, Nubank, Brex) leading a $200M round five months after a $100M Series A is a conviction signal you rarely see — show you understand that.
Most SaaS applications get ghosted. A day-five follow-up can double your response rate.
Applying to Simile? Get the contact, not the form.
The Simile interview process
4 stages · 14 days typical · take-home: no · modelled from similar companies
We don't yet have verified candidate reports for Simile. What follows is the typical process for a 50-200-person SaaS company — treat it as a model, not confirmed detail.
Interview stages
Recruiter Screen
Phone or video · 30 min
Basic qualification and logistics
Recruiter or HR
Hiring Manager Interview
Video call · 45 min
Role fit and experience deep-dive
Hiring manager
Technical/Functional Round
Video call · 60 min
Skills assessment and problem-solving
Team members
Final Round
In-person or video · 60 min
Culture fit and cross-functional alignment
Senior leadership
Simile interview timeline
Simile runs about days from first contact to offer. The median for SaaS companies at 50-200 people is 18 days, so Simile is faster than most.
Interviewed at Simile?
Tell us how it went — stages, questions, timeline. Takes 90 seconds and it's how this page stays accurate for the next person.
Submit your Simile interview experience →Simile jobs, frequently asked questions
How many jobs does Simile have open?
We're tracking 5 active openings at Simile (verified July 2026).
Does Simile hire remotely?
Currently, Simile only has in-office roles in Palo Alto & New York.
What roles is Simile hiring for?
Simile is hiring across Design, Other, Engineering. The most recent opening is GTM Recruiter.
How do I apply for a job at Simile?
Click through to apply, or see our detailed guide on landing a job at Simile.
Does Simile respond to cold emails?
We haven't verified response rates at Simile yet.
Who is the hiring manager at Simile?
At this size, hiring is usually run by the hiring manager or department lead.
What ATS does Simile use?
Simile uses Ashby.
How competitive is it to get hired at Simile?
Roles at 50-200-person SaaS companies typically draw 150-300 applicants in the first two weeks. Applying inside 72 hours of a posting going live is the single biggest lever you control.
How many rounds is the Simile interview?
4 stages: Recruiter Screen, Hiring Manager Interview, Technical/Functional Round, Final Round.
Is the Simile interview hard?
The interview emphasizes relevant experience and culture fit over abstract problems. Hardest stage: Final Round.
Does Simile give a take-home task?
No, Simile does not include a take-home stage.
How long does Simile take to get back to you?
Around 14 days across the full process.
What should I prepare for the Simile interview?
Study relevant experience and culture fit. At this size (50-200), they care about self-sufficiency over textbook knowledge.
Where is Simile based?
Simile is headquartered in Palo Alto & New York.
Get Simile roles before they're posted
A role stays uncontested for about four days. Here's the window — and where we put you in it.
From $9/month, cancel any time.
Watching Simile
0 applicantsRole spotted & verified
1You get the alert
1You've applied
~8Hits the job boards
250+