Full Stack Engineer, Fyxer.AI

React, Typescript

£70-100k

+ Equity

SQL

React

TypeScript

Mid and Senior level

London

4-5 days a week in office (Holborn, London )

AI executive assistant

Job no longer available

AI executive assistant

21-100 employees

B2CB2BArtificial IntelligenceInternal toolsProductivity

Job no longer available

£70-100k

+ Equity

SQL

React

TypeScript

Mid and Senior level

London

4-5 days a week in office (Holborn, London )

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

Exceptional knowledge and experience with React + TypeScript
Comfortable across the stack, frontend, backend, SQL, infra
You’ve worked at a startup (<100 people), been a founding engineer (or one of the first few) or been a technical founder yourself
Product thinker: you want to talk to users, look at usage data, and shape what we build
High urgency and energy - you get things done fast and with purpose
Passionate about AI and the future of work

What the job involves

At Fyxer, engineers don’t just write code they build the product. That’s why we call them Product Engineers
You’ll own features end-to-end, from talking to users to shipping code
We're looking for expert React + TypeScript engineers (frontend or fullstack) who are excited to move fast, solve real user problems, and shape the future of work with AI
An AI Executive Assistant for people drowning in emails, meetings, and admin. Most of today’s knowledge work looks like inbox chaos and calendar juggling
Our AI plugs into your email, Slack, and calendar drafting replies, scheduling meetings, taking actions from conversations, and keeping you organised. It’s like having a top-tier assistant in your inbox 24/7
Our tech stack:
Frontend: React + TypeScript
Backend: GCP (Cloud Functions, Firestore, PubSub, Cloud Storage)
Data: BigQuery, Looker
Infra: GitHub Actions, Sentry, Google Cloud Logging

Application process

Hiring manager is Matt our Cofounder & CTO
Send your CV (no cover letter needed)
20- 30min intro call
45-min live coding session
45-min product case study
Final team lunch

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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