Full Stack Engineer (£75k-£100k + Equity) at Aisy.ai

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This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network

The next step is to speak to Jack.

Job Title: Full Stack Engineer

Salary: £75k–£100k + Equity

Company Description: Aisy.ai - Seed-funded AI-native cybersecurity startup

Job Description:

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.

Location: London, UK

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.

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.

The ideal candidate:

• 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.

Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps

Step 1. Visit our website.

Step 2. Click 'Talk to Jack'.

Step 3. Talk to Jack so he can understand your experience and ambitions.

Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.

Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.

Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.