Fullstack Design Engineer ($140k-$190k + Equity) at Blaxel

Jack & Jill; San Francisco (CA); On-site; USD 140,000 - 190,000; Full time

Job summary

Blaxel, a YC-backed cloud infrastructure startup, is hiring a founding design engineer in San Francisco to own the product experience end-to-end. You will design and ship interfaces for a new category of cloud computing built for humans and AI agents, delivering production-ready React code at lightning speed.

You will leverage AI coding tools to translate designs into a high-quality TypeScript/React codebase and monitor how agents and humans interact with the platform to refine UX patterns and

Qualifications

• Exceptional design taste with attention to spacing, motion, and interaction patterns.
• Strong front-end technical skills: TypeScript, React, and CSS.
• Self-driven with ownership and ability to solve user problems independently.

Responsibilities

• Own the Blaxel Console experience from exploration to production-ready UI.
• Translate designs into high-quality TypeScript/React code using AI coding tools.
• Monitor human-agent interactions to iterate on UX and design systems.

Skills

TypeScript

React

CSS

Design

AI tooling

Job description

Job Title

Fullstack Design Engineer

Salary

$140k-$190k Equity

Company Description

Blaxel is a YC X25 company backed by First Round building the cloud infrastructure for autonomous AI agents. Founded by repeat founders who previously sold ForePaaS to OVHcloud, the team is creating the sandbox, memory, and networking layers necessary for AI agents to operate effectively in production environments.

Job Description

Join Blaxel as a founding design engineer to own the product experience end-to-end. You will design and ship the interfaces for a new category of cloud computing built for both humans and AI agents. Working in San Francisco, you’ll leverage AI tools to move from concept to production-ready React code at lightning speed.

Location

San Francisco, USA

Why this role is remarkable

• Shape a new product category by designing interfaces that serve both human users and autonomous AI agents directly.
• Join a high-growth startup with near-zero churn and strong revenue traction from AI agents already using the platform.
• Work directly with experienced repeat founders in a high-autonomy environment where your designs land in production immediately.

What You Will Do

• Own the Blaxel Console experience from initial exploration and polished UI design to merging production-ready PRs.
• Leverage AI coding tools as your implementation engine to translate designs into a high-quality TypeScript and React codebase.
• Proactively monitor how agents and humans interact with the platform to iterate on UX patterns and foundational design systems.

The ideal candidate

• Possesses exceptional design taste and craft, with an obsessive eye for detail in spacing, motion, and interaction patterns.
• Demonstrates strong technical proficiency in front-end fundamentals, including TypeScript, React, and CSS, to own a production codebase.
• Operates as a mini design founder with high ownership, AI fluency, and the ability to solve user problems independently.