Role overview

As the Lead Machine Learning Engineer, you will own the technical strategy for predicting user actions. You will design complex systems blending LLMs with traditional ML models to automate relationship management for sales teams. Working directly with the CTO, you will leverage a 60-person human data division to build world-class fine-tuned models.

Fyxer AI

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SoftwareLondon, United KingdomSeries B (VC-backed)

Fyxer AI is an AI-powered executive assistant designed to enhance productivity for professionals by managing emails and meetings. The product is integrated directly into Gmail and Outlook to provide features such as automatic email categorization, pre-drafted email replies in the user’s tone, and a Meeting Notetaker that joins virtual meetings to document notes and prepare follow-up emails automatically. The assistant learns continuously from the user's previous correspondence to provide more personalized and increasingly accurate support over time. Fyxer targets client-facing professionals and teams, aiming to save significant administrative time and streamline email and meeting workflows through its SaaS platform.

Backed by Madrona, Lakestar Capital, 20VC, 20Growth, Marc Benioff.

What you will do

Select and implement optimal model architectures using a mixture of LLM steps and traditional machine learning models.
Define evaluation metrics and design production monitoring systems to identify and resolve model performance bottlenecks.
Collaborate with the human data team to procure high-quality training and validation datasets for subjective judgment tasks.

Who this is a fit for

Proven track record as an ML/AI engineer at a high-growth scaleup or as a founder of an AI-focused startup.
Deep technical expertise in Generative AI systems and recommendation engines developed over the last four years.
Product-focused mindset capable of translating user needs into technical decisions regarding model architecture and evaluation methods.

Why this role is remarkable

Exceptional growth trajectory, scaling from $0 to $30m ARR in less than a year with a fresh $30m Series B.
High-autonomy environment with no product managers, where engineers own the full strategy and execution of their business area.
Direct access to a world-class human data division of 60+ annotators from top AI labs to accelerate model training.

How Jack & Jill work together

I get to know what you’re great at, then find roles you’d never find yourself.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.

I recruit from Jack’s network and make the intro when I spot a great match.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.

Lead Machine Learning Engineer at Fyxer AI