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Lead Product Reliability Engineer at Fyxer AI

Join one of London's fastest-growing AI startups as a Lead Product Reliability Engineer. Backed by heavyweights like Marc Benioff and 20VC, this company has exploded from $0 to $30M+ ARR in record time. As a cornerstone of the platform team, you'll earn up to £170k + equity while owning the infrastructure and reliability standards for a product used by thousands of professionals. If you are a TypeScript expert who thrives on high-stakes cloud architecture and solving 'crunchy' technical problems, this is your chance to shape the foundation of a generational AI company.

Overview

Role overview

You will serve as the technical anchor for platform reliability at a hyper-growth AI firm that scaled from $0 to $30M+ ARR in under 18 months. This high-ownership role involves architecting resilient cloud infrastructure, leading incident response, and ensuring the stability of a product that automates critical workflows for global professionals.

Company

Fyxer AI

Fyxer AI

SoftwareLondon, United KingdomSeries B (VC-backed)

$40M funded applied AI startup backed by 20VC and Marc Benioff

Backed by Madrona, Lakestar Capital, 20VC, 20Growth, Marc Benioff.

Responsibilities

What you will do

  • Architect and execute high-stakes infrastructure migrations and database redesigns in Google Cloud with a focus on zero-downtime deployments.
  • Act as the final line of defense for production incidents, utilizing deep technical forensics to diagnose issues and implement permanent systemic fixes.
  • Partner with product engineers to review and harden new features before they ship, ensuring they meet rigorous reliability bars at massive scale.

Candidate profile

Who this is a fit for

  • Expert-level TypeScript proficiency with a proven ability to diagnose and fix production code rapidly during high-pressure outages.
  • Significant experience in cloud architecture (GCP preferred) and deep database design, capable of justifying architectural choices against complex scaling constraints.
  • A high-ownership mindset with previous experience as a primary responder for production systems, maintaining composure while solving mission-critical technical failures.

What makes it remarkable

Why this role is remarkable

  • Join an elite engineering culture that has raised $40M across Series A and B rounds in less than 18 months from premier investors like Madrona and David Singleton.
  • Massive scale and impact: help manage a product where users already accept over 50% of AI-generated outputs, driving rapid growth toward $30M+ ARR.
  • Exceptional autonomy and leadership: as a lead within a small platform team, you will set the reliability standard for the entire company and influence every architectural decision.

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