Lead Machine Learning Engineer, Fyxer AI
£200k
+ Matched equity
More information about location
4-5 days a week in office
AI executive assistant
Open for applications
AI executive assistant
21-100 employees
Open for applications
£200k
+ Matched equity
More information about location
4-5 days a week in office
21-100 employees
Company mission
Get back one hour every day. Begin your day with emails neatly organized, replies crafted to match your tone and crisp notes from every meeting.
Role
Who you are
- You’ve worked at a scaleup tech company as an ML/AI engineer, or been a founder of an AI focused startup
- You want to drive the strategy in your area, rather than just being handed tickets. You’ll be expected to proactively discover possible improvements by looking at usage data, reading relevant research papers, and evaluating models in production
- You’re product focused: you can translate context on what the product is trying to achieve for users into technical decisions, such as on model architecture, category sets/ontology, evaluation methods etc
- Bonus: you’ve spent a large portion of the last 4 years working with systems involving generative AI
- Bonus: you’ve built recommendation systems in past roles
- Urgency and intensity in your work
What the job involves
- Your title will be Lead Machine Learning Engineer
- Matt, Cofounder and CTO, is the hiring manager
- Each of our engineers owns a business area
- They own both the strategy (we have no product managers and have no plans for that to change) and the execution of that strategy
- They choose when to bring in qualitative data (customer interviews, surveys etc) and quantitative, supported by our data engineering department
- We’re very intentional about adding new people
- We think a small team of exceptional people working hard at a problem they care about will always beat a larger, less focused team
- That does mean you’ll need to bring an intensity to this role that might not be asked at other companies
- But it also means you will be fast tracked into more senior roles and responsibilities far earlier
- Currently, Fyxer predicts the next email a salesperson will send, to save them time - both when a reply is needed, and what the user will say
- In 2026, we’ll predict the next action a salesperson should take to move their important relationships forward
- Our competitive edge is the quality of our AI models
- We have 30+ fine tuned custom models live in production, all specialised at a specific use case, and working in concert to produce a great experience
- Users send 52% of the draft content we generate
- To produce these fine tuned models, we’ve built a world class human data division, composed of 60+ data annotators that have experience at the world’s top AI labs and model providers
- They provide the data our models are trained and evaluated on, since it requires subjective human judgment - what emails are marketing, when to set up a meeting, etc
- You’ll have this team as a resource
- You’ll own how we build out and improve the system for predicting the next action our users (salespeople) should take to move their relationships forward:
- Selecting the best model architecture and overall approach to use. It will need to be a complex system involving a mixture of LLM steps and traditional ML models
- Picking evaluation metrics, and designing systems to analyse models in production to identify improvement areas
- Identifying when to use our human data team to provide training or validation datasets
- Reading relevant research to find the best approach for our use case
- In partnership with our CTO, defining how ML works with product engineering and our model ops and human data teams, and how the team develops from here
Application process
- Submit your CV (no need for a cover letter)
- An initial call with someone from the Fyxer AI team to review your experience and motivation for joining (15 mins)
- An interview with the hiring manager discussing your experience (45 minutes)
- Take home test
- Review of take home test, in office (60 minutes) + meet team in office (30 minutes)
Salary benchmarks
Our take
Built with the intention of turning the burden of email drafting into a business's competitive edge, Fyxer AI delivers AI executive assistants that can organise inboxes, draft emails in the tone of voice of each user, and write "better-than-human" meeting notes. Plugging directly into Gmail, Outlook, Slack, Teams, Google Meet and Zoom, its service is simple to use without the need to grasp additional software.
Fyxer is especially useful for industries that spend large amounts of time composing emails. Think real estate, consultants and recruiters, all saving time through the pure-play AI software of Fyxer and its open-source AI models and retrieval augmented generation. The company claims that its customers send 53% of the email drafts generated on its platform.
As more and more professionals turn to AI to save them time in their everyday tasks, Fyxer AI's secure and streamlined service is sure to gain more attention. Things certainly look to be going well, as in 2024, the company raised $500K in just three weeks from existing customers and their networks. It also rocketed from $1m ARR to $22m in just 10 months in 2025 - a sure-fire sign of the value users see in its offering
Steph
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 3 rounds)
Sep 2025
$30m
SERIES B
Mar 2025
$10m
SERIES A
Total funding: $40.5m
Company values
- What do we value? We're very intentional about adding new people. We believe a small team of exceptional people working hard at a problem they care about will always outperform a larger, more unfocused team. That means you'll need to bring an intensity to this role that might not be expected at other companies but it also means you'll be fast-tracked into roles with greater responsibilities far earlier.
Company HQ
Midtown Manhattan, New York
Leadership
Archie Hollingsworth
(Co-Founder & CRO)Founding Member of Pavilion. Co-founded FYXER, an Executive Assistant Agency, in 2016, and is now using that knowledge at Fyxer AI.
Matthew Ffrench
(Co-Founder & CTO)Previously co-founded and was CTO at Mercado. Was also Product Manager at Zopa.
Richard Hollingsworth
(Co-Founder & CEO)Founding Member of AI Circle. Co-founded FYXER with Archie, and was a Quant Trader at Bull Moose Derivatives.
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