Join a high-intensity team as a Lead Growth Engineer to own Fyxer AI's growth loops. You will move from strategy to execution, using data-driven experiments to optimize onboarding, monetization, and virality. Working with a technical team of 12, you will play a critical role in scaling the product from $30M to $100M ARR.
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Lead Growth Engineer at Fyxer AI
Join Fyxer AI, the startup ranked #7 in a16z’s top AI apps, as they scale from $30M to a forecasted $100M ARR. As a Lead Growth Engineer, you'll bypass the red tape of product managers to own entire growth loops and strategy. If you're a high-intensity full-stack engineer with a passion for conversion psychology and data, this is your chance to build the next $10B AI company in the heart of London.
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Location
London, United Kingdom
Compensation
£140k-£250k + Equity
Company
Fyxer AI
Role overview
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
- Independently ideate, wireframe, and implement full-stack experiments to improve product-led growth and seat expansion.
- Analyze quantitative data using Metabase, BigQuery, and PostHog to prioritize your backlog and measure experiment impact.
- Build and optimize viral loops, referral journeys, and revenue operations infrastructure using a modern serverless TypeScript and React stack.
Who this is a fit for
- Expert-level TypeScript and React skills with the ability to function as a full-stack engineer including SQL and DevOps.
- Proven experience in growth engineering, specifically optimizing customer journeys, network effects, and B2B SaaS growth mechanics.
- High-intensity mindset with previous experience at an early-stage startup (<100 people) or as a founder.
Why this role is remarkable
- Exceptional traction: Scaling from $1M to $30M ARR in a single year with a lean technical team of just 12 people.
- Market Validation: Ranked 7th in Andreessen Horowitz’s list of top AI apps, alongside companies valued at $10B+.
- True Ownership: You own entire growth loops and strategy with no product managers, providing a fast track to senior leadership responsibilities.
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.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Fyxer AI wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.