Staff Product Engineer

We are thrilled to be partnering exclusively with Fyxer AI - the fastest growing AI start-up in the UK - to recruit a world-class Staff Product Engineer for their London team.

What Are They Building?

Great people are working on overdrive to do a great job but are held back because their inbox is failing them. Fyxer AI is building an AI productivity tool that eliminates admin for client-facing professionals: consultants, recruiters, real estate agents anyone drowning in emails, scheduling, and follow-ups. Fyxer AI drafts emails in your voice, takes crisp meeting notes, and auto-manages your inbox.

How’s It Going?

Since launching in May 2024, they've grown from $0 to $15+ ARR with thousands of paying users. In Feb 2025, they raised a $10M Series A backed by top-tier investors including Marc Benioff (Salesforce) and 20VC.

They spent Q4 2024 at HF0 in San Francisco, the top AI startup accelerator, learning from legends like the CEO of Instacart and the Head of Applied Research at OpenAI.

They are now entering hypergrowth and building the engineering team that will scale them to $50M+ in revenue.

What They Value

Small teams. Big ownership. High talent density.

They don’t hire for headcount. They hire people who ship, who care, and who think from first principles.

They only hire product engineers. What that means is instead of just being given tickets to implement, you’ll be owning 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.

WHAT WILL YOU BE DOING?

In short, you will own one of Fyxer's most important products:

• Decide on metrics for your product, and gain an intuitive understanding of its value by using it yourself and speaking to customers.
• Use quantitative data, customer insight, and product sense to build a strategy for your product area, and prioritise initiatives within that strategy
• Execute your strategy by coding up your ideas
• Manage and improve reliability in your product area, by monitoring logs, analysing support tickets and fixing bugs

A key area for responsibility will be mentoring and developing other product engineers, setting the product direction for a large area of the business, and setting the direction for the tooling the team uses internally to be productive.

WHAT DOES THE IDEAL HIRE LOOK LIKE?

• You’ve worked at an early stage tech company (