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SAMMY Labs (YC W25)
Founding Engineer

Founding Engineer

Hybrid

London, United kingdom

Junior

Full Time

25-09-2025

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Job Specifications

**Must be currently based in London (sorry we can't take folks moving to london in X months - you need to be based in London today). Unfortunately we cannot support visa sponsorship! Sorry!**

JDs are always too long - we prefer to chat in person! However, here are the essentials:

Senior Engineer (4+ years experience). Must be comfortably full-stack and happy to work autonomously.
Engineer (2+ years experience). Must be happy to experiment / not precious about dropping something half-way-through.

No salary bounds - pitch us on what you want

Free lunch and dinner

Cute office dog

Backed by YCombinator, Base10, a16z SF, and more

Based in Angel/Islington.

Long JD:

At SAMMY Labs we update company knowledge automatically. That doc you never wrote? It's fine SAMMY's got you. That agent that misses edge cases? SAMMY will teach it. That browser agent that never knows where to click? SAMMY will show the way.

We are growing extremely quickly with many unicorn customers (and startups!) using SAMMY.

The roles:

Senior Engineer (4+ years experience). Must be comfortably full-stack and working autonomously.
Engineer (2+ years experience). Must be happy to experiment / not precious about dropping something half-way-through.

Ideally you are...

We are all builders and there's a lot to build! We love folks who build in their spare time so show us the cool stuff you have made.
Being able to speak to customers is key (unless you're absolutely cracked, then we'll make an exception...)
We work long hours, if you're not at a point in your life where you can work a 10+ hour day that's totally fair (but please dont apply )

Wait so it's a full-stack role? Sort of... If you're purely front-end or backend you need to show you are a beast at one of them - how you show us is up to you

Pay & Equity

Not being transparent with pay & equity sucks, we know. Which is why there is no upper limit to either, come to us with an offer - if you think you're a 150k/yr dev just tell us why, and if we agree - that salary is yours. Same with equity.

The market rate (for reference) appears to be 95k for 4yrs and 75k for 2yrs experience respectively. But again, if you think you're a 200k year dev then pitch us.

Culture & Team

We have overwhelming demand right now, we've had to move new customers to a waitlist... which means we work super hard. If you're past the late nights stage of your career that's totally understandable! We are all laser focused on building a generational company and that should excite you too!
Everyone is autonomous, if you prefer to have a checklist of things to do then perhaps SAMMY isnt for you. You'll be setting your own roadmap.

We're ex-Palantir, ex-founders, ex-hedge funds.

Benefits:

We pay whatever you want - it's up to you to convince us you're worth it. That includes equity. We're well-funded and want to take the best folks so the salary should match!
Free lunch & dinner / Joe will cook for you (eat at your own risk)
Our CEO's dog, Luffy, is unbelievably cute (you must be okay with dogs, he's a non-negotiable!)

About the Company

SAMMY is an Al that explores your app like a real user, mapping every possible click to generate content, onboard users and spot issues. It updates automatically with every product change, keeping everything running smoothly. It may feel like magic, but it's just powerful technology at work. Know more