AI engineer (UK)
You’d ship language-model applications and agents for Writer’s customers, from the London hub.
- London, hybrid
- Full time
- Reports to the head of AI engineering
- Pay not listed
This job is open.
Jack works for you and is free. Hiring companies pay us.
Jack’s take. Jack is an AI agent who gets to know what you’re great at, then finds your next job and helps you land it.
“The most common AI engineer job in London is building product features a customer uses. This job is that kind.”
Who it suits
A good fit
- want to ship agents and language-model features that a customer uses
- like working with research, data, and product on the same feature
- care about bias, explainability, and safety in what you ship
Think twice
- want a research job with nothing to deploy
- don’t want a hybrid week in London
What you’d do
- Build and deploy AI applications into production, including the integrations on Writer’s platform.
- Turn research into agents and features a customer can use.
- Work with research scientists, data scientists, and product managers on the requirements.
- Handle bias, explainability, and safety in what you ship.
What they ask for
- You have 5 or more years of professional experience building and deploying machine learning or AI systems in production.
- You can take an AI application from design into a production environment.
- You can work with research and product on the same feature.
- You’ll work hybrid from the London hub.
How it works
- You would report to the head of AI engineering.
What to know about this job
Open at least 19 weeks. Half of London AI engineer jobs have closed by week 9.
- Week 9Half of London AI engineer jobs have closed
- Week 19This job has been open this long
In November 2026, Writer had 2 AI engineer jobs open. This one is in London, and the other is in San Francisco and New York.
The product builder, the most common kind of AI engineer in London
- 46%The product builder (this job). Builds product features on large language models, from agents to search, and checks the answers hold up.
- 25%The platform builder. Builds the systems that train, serve and monitor models so they run fast and reliably at scale.
- 23%The model builder. Trains and fine-tunes their own models, such as recommendations, vision or fraud, and ships them into the product.
Shares of open AI engineer jobs in London.
Most new London AI engineers weren’t AI engineers before
- 71% of people who became AI engineers in London weren’t AI engineers in their last job.
- 47% of them came from a startup or scale-up.
Writer doesn’t list pay for this job
The London AI engineer guide shows what AI engineers in London expect to earn.
What London AI engineers earnWorth asking the hiring team
- “How many days a week would you spend in the London hub?”
- “How much of the week is research, and how much is shipping the application?”
Jack’s take on Writer
- Signed contracts passed $50M in 2025
- Valuation nearly quadrupled to $1.9B in 2024
- The team grew to about 500 people in 2025
- Key leaders
- A hybrid, high-ownership place to work
- Based in San Francisco, New York and London
- Founded 2020
- 46 open jobs
Similar jobs in London
Other open jobs at in-demand startups.
About this page
Jack & Jill isn’t Writer’s recruiter. We summarized this job from Writer’s public careers page, where you can apply. We check whether it’s still open each time you open this page. The market numbers come from our London AI engineer guide and the company facts from Writer’s page. We last checked this summary against the posting on November 9, 2026. Jack’s take is Jack & Jill’s own.