Senior UI & Motion Engineer — Equity & Flexible Work

AION; San Francisco (CA); On-site; USD 170,000 - 230,000; Full time

Benefits offered by this job

Equity ownership

Flexible work options

Wellness benefits

Job summary

aion is hiring a design engineer who builds like a founder. You’ll design, build, ship, and own UI that feels physical, with shaders and 3D work integrated into production interfaces. You’ll prototype in code, validate on real devices, and push aION’s enterprise AI platform with fast, accessible UI.

You’ll lead production frontend work using React/TypeScript, develop tooling to accelerate the team, and strive for pixel-perfect, high-performance experiences that scale across devices.

Qualifications

• 5+ years shipping production front ends.
• Expert level React and TypeScript.
• Motion values and direct DOM updates for high-frequency UI.
• CSS in depth: advanced layouts and animations.
• Performance-focused, 8 ms frame budget targets.
• Accessibility as craft: keyboard navigation and reduced-motion respect.

Responsibilities

• Take ideas from a blank file to production and own the ship.
• Build production UI in React and TypeScript, from primitives to surfaces.
• Create design-system tooling and internal apps to speed team delivery.
• Tune motion and gestures for physical feel and responsiveness.
• Develop 3D, shader and generative work to enhance UX.
• Review builds on real devices, ensuring robustness and accessibility.

Skills

React

TypeScript

Motion design

Accessibility

Performance optimization

3D graphics

Tools

Three.js

React Three Fiber

WebGL

WebGPU

CSS in depth

Job description

aion is hiring a design engineer who builds like a founder. You’ll design, build, ship, and own UI that feels physical, with shaders and 3D work integrated into production interfaces. You’ll prototype in code, validate on real devices, and push aION’s enterprise AI platform with fast, accessible UI.

You’ll lead production frontend work using React/TypeScript, develop tooling to accelerate the team, and strive for pixel-perfect, high-performance experiences that scale across devices.