Senior Product Engineer, Fyxer.AI

React/Typescript, AI Startup

£95-115k

+ Equity

SQL

React

TypeScript

Mid and Senior level

London

4-5 days a week in office

AI executive assistant

Be an early applicant

AI executive assistant

21-100 employees

B2CB2BArtificial IntelligenceInternal toolsProductivity

Be an early applicant

£95-115k

+ Equity

SQL

React

TypeScript

Mid and Senior level

London

4-5 days a week in office

21-100 employees

B2CB2BArtificial IntelligenceInternal toolsProductivity

Company mission

To offer executives a holistic service rather than a single employee and EA’s flexible and remote working.

Job

Company

Role

Who you are

We're not looking for ticket-takers
We're hiring the top % of product-minded engineers who want full ownership of what they ship from shaping the roadmap to writing world-class code
You’re a React & TypeScript expert with deep technical hands-on experience of more than 4+ years
You’ve worked in early-stage companies (sub-100 people), or you've been a founder
You care about product as much as code and you're eager to explore customer problems, not just implement specs
You’re full-stack enough to jump into backend APIs, write SQL queries, and handle devops basics
You thrive in high intensity, high ownership environments
You're excited about AI, not just as a buzzword but for its practical power to transform work

What the job involves

You’ll be part of a small, senior engineering team trusted to:
Dive deep into usage data and customer feedback
Propose and build features that meaningfully improve the product
Architect clean, scalable systems
Move fast, ship often, and take pride in quality
Our Stack:
Frontend: React, TypeScript
Backend: TypeScript on Google Cloud (Cloud Functions, Firestore, Pub/Sub)
Data: BigQuery, Looker
Monitoring: Sentry, GCP Logging
DevOps & CI/CD: GitHub Actions

Application process

Submit your CV (no cover letter needed)
Intro call with someone from the team with an initial paired programming exercise (30 mins total)
Product case study (45 mins)
Live coding interview (45 mins)
Team lunch and culture fit conversation (60 mins)

Salary benchmarks

Our take

Fyxer AI delivers AI executive assistants that can organize 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.

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 - a sure-fire sign of the value users see in its offering.

Steph

Company Specialist at Welcome to the Jungle

Company

Funding (2 rounds)

Mar 2025

$10m

SERIES A

Aug 2024

$0.5m

EARLY VC

Total funding: $10.5m

Company HQ

Alamo Square, San Francisco, CA

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)

Previoulsy 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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