Fyxer
AI Email and Meeting Assistant
LeadPlatformEngineer
Neural analysis suggests this role is
optimal for Lead candidates.
“Lead Platform Engineer at Fyxer. Skills: Platform Engineering, Cloud Architecture, Database Management, Incident Response, Full-stack Development. Plan and execute infrastructure migrations. Be the last line of defence when things break”
What You'll Achieve.
Eliminates admin burden for professionals in client-facing roles; Users send 53% of the email drafts we generate; Grown from $0 to $30M+ ARR; Raised a $10M Series A and a $30M Series in under 18 months; Keep Fyxer running as we scale; Own the reliability standard for the whole company; Keep a fast-moving product on solid ground; Migrated our billing structure in Stripe from a subscription model to usage-based billing, with zero downtime; Redesigned the entire webhook architecture behind our Outlook integration to completely eliminate rate limiting, changing a core part of the product without any downtime; Ensure new features meet the reliability bar before they reach production; New features and onboardings don't break what's already working
Industry & Context.
Find the right answer fast, with deep knowledge of how systems behave under pressure; Diagnose it, fix it, and make sure it doesn't happen again; Identify the highest-leverage reliability improvements; Designing and building features alongside our product engineers
Mon–Thu in office, Fri WFH
What They're Looking For.
Must Have
Solid TypeScript. Expert level., Serious cloud experience. Google Cloud or equivalent, at depth., Deep database knowledge., Production ownership., Fullstack capability., Genuine obsession with learning.
What You'll Do.
Plan and execute infrastructure migrations
Be the last line of defence when things break
Use quantitative data and qualitative data to identify the highest-leverage reliability improvements
Build and maintain the scripts
and cloud architecture that the product runs on
Work closely with product engineers to review new features before they ship
Own the reliability standard across your product area
How You'll Work.
Team & Collaboration
Work closely with product engineers to review new features before they ship; Lunch with the whole platform team
Full Job Description
THE BASICS This role pays up to £170k/year DOE + equity Reporting to: Founding Engineer, Josh Harrison Location: Chancery Lane, London — Mon–Thu in office, Fri WFH WHAT ARE WE BUILDING Fyxer is an AI Email and Meeting Assistant that eliminates admin burden for professionals in client-facing roles. Think sales, consultants, recruiters. We understand your inbox, draft replies in your own voice, and take crisp meeting notes. We're a pure-play applied AI company, not a SaaS product with AI bolted on. We use fine-tuned open-source models, tool use, and retrieval-augmented generation. Users send 53% of the email drafts we generate. Since launching in March 2024, we've grown from $0 to $30M+ ARR. We raised a $10M Series A and a $30M Series B in under 18 months. Our backers include Marc Benioff (Salesforce), Harry Stebbings (20VC), David Singleton (ex-CTO of Stripe), and Madrona (first investors in Amazon and Snowflake). THE ROLE We're hiring a Lead Platform Engineer to sit within our platform team, a small, high-ownership group responsible for the infrastructure and services that keep Fyxer running as we scale, including taking ownership for billing, integrations with third-party apps, uptime and incident response. This isn't a ticket-execution role. You'll own the reliability standard for the whole company: what good infrastructure looks like, what it takes to ship safely, and how incidents get resolved and don't repeat. You'll work across the full stack, from cloud architecture to database migrations, using deep technical knowledge and sound judgement to keep a fast-moving product on solid ground. Some examples of what the team has achieved in the past months to get a taste: - Migrated our billing structure in Stripe from a subscription model to usage-based billing, from technical specification through to implementation, with zero downtime. - Redesigned the entire webhook architecture behind our Outlook integration to completely eliminate rate limiting, changing a core
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