User Experience jobs in United States

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London, United Kingdom

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6989b285e7a9

3

24.04.2025

08.06.2025

• This role pays £70k–£90k/year + equity.
• Kameron, our Senior Growth Engineer, is the hiring manager.
• We work from our office in Chancery Lane, London, Monday to Thursday. Fridays are work-from-home days.

We’ve built an AI executive assistant that looks at your emails, messages, and meetings, and uses that knowledge to answer your emails, schedule meetings, take next steps from meetings, and organise your inbox.

Unlike other startups, we’re a pure-play applied AI company—not a SaaS company with AI features hastily bolted on. We use the best techniques (fine-tuned open-source models, tool use, and retrieval-augmented generation), and as a result, users send 53% of the email drafts we generate.

Since our launch in March 2024, we’ve grown from $0 to $7.5 million in revenue, serving thousands of paying users. In February 2025, we raised a $10 million Series A to accelerate our path to $50 million in revenue—backed by top-tier investors including Marc Benioff (CEO of Salesforce) and 20VC.

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 more senior roles and responsibilities far earlier.

We also believe in hiring people who want ownership and autonomy in their work—and giving it to them. We hire T-shaped individuals who can own the entire product development lifecycle. Instead of just being given tickets to implement, you’ll own a whole product: shaping the roadmap by thinking from first principles, looking at usage data, and speaking to customers—then architecting and implementing your ideas.

• In short, you'll be expected to come up with and entirely own implementing your experiment ideas to improve product-led growth at Fyxer AI.
• Although you'll be working alongside other growth engineers, this role requires a lot of independence and self-management to come up with ideas and execute them.
• You'll use data from Metabase, BigQuery, and PostHog to generate new ideas, analyse your experiments, and prioritise your backlog.

Must have:

• Thorough understanding of TypeScript and React.
• Can function as a full-stack engineer (leaning heavily towards front-end development), working on both client and server-side code, answering data questions using SQL, and contributing to DevOps and CI/CD processes.
• Core growth skills including data analysis, UX design, and product development, combined with a passion for marketing and conversion psychology to ideate and build high-impact experiments.
• A sense of urgency and intensity in your work.

Ideal:

• Worked at an early-stage tech company as an engineer.