Blaxel
Actively Hiring

Product Designer

San Francisco, CA
Full-time

About the role

We're looking for a world-class Founding Design Engineer to own product design end-to-end at Blaxel: from the first exploration to production code running in front of real users. You'll design the experience of a new category of cloud computing, then build it yourself, using AI to ship at a speed that wasn't possible even two years ago.

This is a designer-who-ships role, not a handoff role. We need someone who thinks like a mini design founder, treats the product as their own, and closes the full loop: watch how people use Blaxel, design what should change, implement it in production, measure it, repeat.

What you'll do

  • Design and ship. Take features from concept to polished UI to merged PR. Your designs land in production and get used by real customers, not archived in a Figma graveyard.
  • Use AI as your implementation engine. Pair with AI coding tools to translate your designs into our front-end codebase, accurately and fast, and get them through review like any other engineer.
  • Monitor how humans and AI agents actually use the platform. Watch sessions, dig into usage data, and proactively propose how the UX should evolve.
  • Close the loop. Ship improvements, measure their impact on activation and platform usage, double down on what works, kill what doesn't.
  • Raise the design craft bar everywhere users touch Blaxel: console, onboarding, docs, emails, marketing site.
  • Build the foundations: design system, component library, and interaction patterns that scale with the product.

Who you are

  • Designer first. Exceptional taste and craft are the bar — taste is the rarest skill in this role and the hardest to learn.
  • Obsessive about detail. Spacing, motion, microcopy, empty states, edge cases.
  • Technical enough to own a codebase. Solid front-end fundamentals (TypeScript, React, CSS).
  • Deeply AI fluent. You use AI as a force multiplier on real design and engineering judgment, not a substitute for it.
  • Product-minded. You think in user problems and KPIs, not just screens.
  • Mini design founder. Strong ownership, high ambition, comfort with the pace and ambiguity of an early-stage startup.

About Blaxel

Blaxel is a cloud infrastructure company purpose-built for AI agents, often described as 'AWS for AI Agents.' The platform provides a serverless, perpetual sandbox environment enabling developers to build, deploy, and scale autonomous AI agents without managing underlying infrastructure. Its core differentiator is a sub-25ms sandbox resume time powered by microVM technology, co-located agent hosting, a unified AI gateway, and GitHub-native developer workflows. Founded in 2024 by six co-founders who previously built and sold ForePaaS to OVHcloud, Blaxel is backed by First Round Capital and Y Combinator.

Other roles at Blaxel

Interested?

Let me introduce you to the founders.

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Job details

Salary

$140,000 - $180,000

Location

San Francisco, CA

Experience

0+ years

Company

NameBlaxel
IndustryB2B
Team Size9

Funding

Total raised

$7.3M

Last stage

Seed

Investors

First Round Capital
Y Combinator
Liquid 2 Ventures
MMultimodal Ventures
TTranspose Platform
CRV
TTheory Ventures
SSwift Ventures
CCharles Zedlewski
Access Fund VC
Tekedia Capital

Founders

Paul Sinaï

Paul Sinaï

CEO & Co-Founder

LinkedIn
Christophe Ploujoux

Christophe Ploujoux

Co-Founder & CTO

LinkedIn
Thomas Crochet

Thomas Crochet

Co-Founder

LinkedIn
Charles Drappier

Charles Drappier

Co-Founder

LinkedIn
Nicolas Lecomte

Nicolas Lecomte

Co-Founder

LinkedIn
Mathis Joffre

Mathis Joffre

Co-Founder (Engineering)

LinkedIn

What happens next.

No applications, no recruiter spam. Just the intro.

01

Confirm the fit

A few questions to make sure this role is the right shape for you. Two minutes.

02

I pitch you to the company

I write the intro, send it to the founder, and handle the back-and-forth.

03

A meeting lands on your calendar

If they’re a yes, I book the chat. You show up — that’s the whole job-hunt.