Founding Full Stack Engineer
Ajax, New York City
- Pay
- $210K – $270K • Offers Equity
- Work type
- Onsite
- Level
- Not stated
- Area
- Software engineering
- Posted
- Feb 18, 2026
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About the role
OUR MISSION
Ajax is on a mission to help law firms capture and organize their latent knowledge and put it to work. The legal services industry takes in over $1T in annual revenue and boasts 1.5 million practicing attorneys just here in the US, but AI has clients wondering what exactly they're paying so much for.
These clients are half-right: AI makes it faster to draft rote motions and review voluminous documents during discovery. But law firms have never been in the business of mutating and transmitting documents; they're paid to apply their firm's institutional knowledge and best practices to their clients' specific cases. Ajax automatically captures this knowledge and helps firms redeploy it toward faster, cheaper, and more effective legal services.
THE COMPANY
Our mission is lofty, but our product provides tangible, day-1 benefit to firms. We started by addressing the firm’s core revenue driver: our AI timekeeping product tracks attorneys' work and draftsbillable time entries for them, finding each attorney tens of thousands of incremental dollars per year. This product has 5x annual growth, hundreds of law firms, and thousands of DAUs.
Metrics we’re proud of We’re solving the worst problem 1.5 million attorneys in the US face. Our metrics are exceptional:
- 14 customers have invested in Ajax with their own money
- <1% Customer Churn: we build long term partnerships with our customers (<10% annual is considered good) https://chatgpt.com/share/694c073e-9004-8001-9eeb-c0bc41bab23b
- 97% Pilot Conversion Rate: when we start pilots, we win them (>70% is considered good) https://chatgpt.com/share/694c0787-79b4-8001-8cb5-3074bd6a5f1c
- 140% Net Dollar Retention: after firms convert with Ajax, they share it with more and more employees (>120% is considered good) https://chatgpt.com/share/694c07ed-a0ac-8001-91c8-ed60e2f9da33
WORKING AT AJAX
HOW WE WORK, IN PRACTICE
Here’s a real sprint we had in November:
1. During a pilot with an important firm, the GTM team noticed that activation was low
2. We pulled some data from Posthog and Metabase and came up with a hypothesis: these users were the fastest billers we’ve ever seen, and Ajax’s entries weren’t ready for them in time
3. Nat restructured our React FE to show a Domino’s pizza style “entry in progress” tracker, assuring nervous billers that their work was indeed captured
4. Alex issued a native app update for our Flutter app that captured data more quickly when users task switch
5. Roger optimized some gnarly python async code to bring our p99 entry latency from ~180s to ~120s.
6. 🎉 We won the pilot! 🎉
WHO YOU ARE
- Ownership: a wise man* once said the difference between senior engineers and junior engineers is that senior engineers own the feature into production and beyond
- Empathy: to build features end to end, you must be able to sit in our customers' shoes. Our company makes bs work go away for lawyers that work really hard; that needs to speak to you.
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Listed on Ajax's Ashby job board; checked 7 h ago. First seen by us 2 days ago. Being listed doesn't mean the team is actively interviewing. We found this board in a public directory and haven't yet confirmed it against the company's own careers page.