You will join as a founding engineer building an AI engine that prioritizes cybersecurity threats through the lens of an attacker. Working directly with the founder, you’ll develop a Python-based backend and React frontend to automate complex vulnerability management, transforming how organizations defend against sophisticated, multi-stage digital attacks.
Full Stack Engineer at Aisy.ai — AI-native cybersecurity platform
Aisy.ai is redefining cybersecurity by building an AI engine that thinks like a hacker. Led by the former head of R&D at HackerOne and backed by a $2.3M seed round from top-tier investors like 6 Degrees Capital and Flying Fish, we are looking for a Full Stack Engineer (Python/React) to join our founding team in London. This is a rare opportunity to work directly with elite security experts, gain significant early-stage equity, and solve the noise problem in a $17B+ market. If you have 2-6 years of experience and want to build the future of AI-native defense, apply now.
Overview
Why this role stands out
Company
Responsibilities
What you will do
- Build and maintain core product features across a Python/Prefect backend and React frontend, handling everything from authorization logic to production debugging.
- Translate customer requirements into shipping code rapidly, developing synthetic data generation tools and configuration investigation workflows to enhance the AI engine.
- Apply real-world attacker logic to software, creating systems that identify exploit chains and root causes rather than just reporting isolated bugs.
Candidate profile
Who this is a fit for
- 2-6 years of professional engineering experience with strong fundamentals in Python and modern React, having shipped products in both startup and scaled environments.
- Proven ability to manage databases and write effective tests, with a pragmatic approach to using LLMs as a force multiplier for development.
- A curious, high-energy generalist who thrives in an office-first culture (4 days a week) and is motivated by the challenge of building a company from the ground up.
What makes it remarkable
Why this role is remarkable
- Work directly alongside founder Shlomie Liberow, former HackerOne R&D lead who managed security programs for the UK Ministry of Defence and FTSE 100 companies.
- Join a high-caliber team backed by a $2.3M seed round from 6 Degrees Capital, Flying Fish, and Osney Capital, with advisors from DeepMind and 1Password.
- Gain massive ownership as one of the first 6 employees, shaping the product architecture of a platform targeting the $17B+ vulnerability management market.
Jack & Jill
How Jack & Jill work together
About Jack & Jill
Meet Jack
Jack gets to know what you are great at, what you want next, and makes sure Jill considers you for the right opportunities.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.