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Litmus

Run an async work trial on every engineer you interview.

Litmus is the most accurate read on how an engineer actually builds. We evaluate candidates through async technical assessments built from your own tech context (repos, tickets, and job descriptions), generated from scratch and scoped as real end-to-end features. Candidates work in their own setup with all their tools including AI, while we track and evaluate their process and output. Every submission runs in a sandbox, and grading is tuned to your company across tool fluency, process, and outcome. You get a real read on how someone actually builds, not just how they interview.
Active Founders
Shaivi Rau
Shaivi Rau
Founder
Co-founder, CEO of Litmus. Hiring sucks, we're fixing it. Prev @ Morgan Stanley, early stage teams, and in VC. CS & Film @ Columbia.
Elena Zhao
Elena Zhao
Founder
Building Litmus
Company Launches
Litmus - The industry's most accurate engineering interview
See original launch post

TL;DR: We evaluate candidates through async technical assessments built from your own context (repos, tickets, and job descriptions) and let them work in their own setup with all their tools while we track and evaluate their process and output. Engineering is changing; we help you hire for the role it’s becoming. Learn more at litmushiring.com.

https://www.youtube.com/watch?v=lusUktcmZGA

The problem
You're a month in with a new hire and they're just not getting it: struggling to ship independently, shipping AI-generated code they can't explain, clueless when production breaks. None of this showed up in your interview because your interview was never designed to catch it.

We all already agree LeetCode sucks. But work trials are time-draining, unscalable, and kind of awkward when you know within the first hour someone's not gonna make it. So most teams are stuck choosing between a broken screen and a process that doesn't scale.

What we built
Litmus fixes both. We turn your repos, tickets, and job descriptions into a full interview pipeline where every assessment is generated from scratch for your company. Not a generic template, your actual codebase, your real engineering problems, scoped as end-to-end features.

Candidates work in their own setup, with all their tools including AI because that's how engineering works now, and that's what you're hiring for. 

Every submission runs in a sandbox, so graders evaluate real code execution, not what looks good on paper, and grading is tuned to your company across tool fluency, process, and outcome. 

The result: a real read on how someone actually builds, not just how they interview.

  1. Generate Tailored Assessments

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  2. Candidates take Assessments

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  3. Evaluate at Scale

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  4. Deep Dive into Top Candidates

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Traction
3,000+ assessments evaluated. $60k ARR, growing fast. We've built the hiring system for Neo Scholars, their portfolio, and others. Let us bring our expertise to your team.

Who we are
We're Shaivi and Elena. As a SWE at Two Sigma and Meta, Elena watched people ace every interview and then fail to build anything real on the job. Shaivi worked at early-stage startups and in VC, sitting beside founders as they agonized over which engineers to trust with the product. Two sides of the same coin - the most important decision a company makes is its team, and current interviews still can't tell you who'll deliver. Litmus does.

Our ask
Scaling your eng team? We'll come to your office, set you up, and run Litmus on your next role. Book a demo at litmushiring.com. And if you know a team drowning in engineering interviews, send them our way.

YC Photos
Litmus
Founded:2025
Batch:Summer 2026
Team Size:4
Status:
Active
Location:New York City, NY
Primary Partner:Jared Friedman