AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup

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๐Ÿ“ London UKFullTime

About this role

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.

AI Engineer

Salary: $100K - $250K + Equity

Company Description: Fast-growing legal tech startup

Job Description:

Join a high-performance team as a founding AI Engineer to develop state-of-the-art LLM algorithms and production-ready evaluation pipelines. You will lead the development of proprietary models, optimize prompting strategies, and ship high-impact features for a global user base. This role offers the chance to define the technical trajectory of a rapidly scaling AI platform.

Location: London, UK

Why this role is remarkable:

  • Significant equity ownership in a high-growth startup with massive traction and real paying users.

  • Backed by top-tier VCs and founders of global tech giants, ensuring stability and rapid scaling.

  • Work within an elite, talent-dense engineering team composed of PhDs and researchers from world-leading institutions.

What you will do:

  • Develop and lead the production of proprietary AI algorithms to push the boundaries of large language models.

  • Build and maintain a state-of-the-art evaluation pipeline to benchmark performance on large datasets.

  • Research and implement advanced prompt engineering methods to maximize model efficacy and output quality.

The ideal candidate:

  • Expert in Python with industry experience shipping AI algorithms and evaluation pipelines into production.

  • Hands-on experience with large language models, prompt engineering, and back-end development using PostgreSQL.

  • Ambitious, high-velocity engineer who thrives in fast-paced environments and prioritizes shipping products to customers.

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.

Frequently Asked Questions

Is the salary disclosed for the AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup position at jack-jill-external-ats?
The salary for this AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup role at jack-jill-external-ats is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup position at jack-jill-external-ats located?
This AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup role at jack-jill-external-ats is based in London UK. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup role at jack-jill-external-ats full-time or part-time?
This is listed as a FullTime position. It is posted as a AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup role in the GTM department at jack-jill-external-ats.
Which team or department does the AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup at jack-jill-external-ats belong to?
This AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup position is part of the GTM department at jack-jill-external-ats. See the full job description for more information about the team structure and responsibilities.
How do I apply for the AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup position at jack-jill-external-ats?
Click the "Apply Now" button on this page. You will be redirected to jack-jill-external-ats's official application portal hosted on ashby where you can submit your application directly.
When was the AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup job at jack-jill-external-ats posted?
This AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup position at jack-jill-external-ats was posted on Feb 3, 2026. Apply as soon as possible โ€” early applications are often reviewed first.
AI Engineer ($100K - $250K + Equity) at Fast-growing legal tech startup
jack-jill-external-ats
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