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Staff Engineer at seed-stage agentic AI startup

Job in Greater London, London, Greater London, W1B, England, UK
Listing for: Jack & Jill/External ATS
Full Time position
Listed on 2026-02-28
Job specializations:
  • Software Development
    AI Engineer, Machine Learning/ ML Engineer
Salary/Wage Range or Industry Benchmark: 80000 - 100000 GBP Yearly GBP 80000.00 100000.00 YEAR
Job Description & How to Apply Below
Location: Greater London

Staff Engineer

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.

Company Description

Seed-stage agentic AI startup

Job Description

As a Staff Engineer, you will spearhead the development of a sophisticated agentic AI platform. Leveraging your deep expertise in data domains, you will design scalable architectures that enable autonomous agents to navigate complex environments. This role is pivotal in bridging cutting‑edge research with production‑grade engineering to redefine human‑AI collaboration at a foundational level.

Location

London, UK

Why this role is remarkable
  • Work at the absolute frontier of agentic AI and autonomous systems with a high‑calibre technical founding team.
  • Join a well‑funded seed‑stage venture backed by top‑tier VCs at the earliest possible chapter of their growth.
  • Influence the entire technology roadmap and architectural direction of a platform poised to disrupt the data domain.
What you will do
  • Architect and implement robust frameworks for agentic AI systems that process and act upon complex data.
  • Lead technical strategy and mentor a growing team of engineers in high‑performance computing and machine learning.
  • Collaborate with product and research teams to translate abstract AI concepts into scalable, user‑facing features.
The ideal candidate
  • Extensive background in data engineering or data‑intensive applications with a track record of architectural leadership.
  • Recent, hands‑on experience developing agentic AI systems or working with LLM‑based autonomous workflows.
  • Proven ability to thrive in a fast‑paced seed‑stage environment where rapid iteration and ownership are essential.
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.

#J-18808-Ljbffr
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