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Founding Design Engineer

Helium, San Francisco, California

Posted pay

$150K–$200K

a year

Location: San Francisco, California
Work type: Not given
Level: Not given
Experience: 1+ years
Skills in the job text: TypeScript
React
Go
ClickHouse
Next.js
Posted: Jan 8, 2026
Last check: 3 h ago
Job type: Software engineering

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The role

Talent-dense (8 people, 6 engineers, 75% ex-founders)
Well-funded ($6M from Google & Leaders from OpenAI)
Fast-growing (Serving tens of millions of AI experiences per day for top consumer companies).

Nice to have

Experience designing interfaces for AI products or ML-powered features
Experience optimizing frontend performance and reducing latency
Experience with brand, visual design, or creating design systems.

Founder experience

AI has created a once-in-history opportunity, and we’re here to win, because of that

🔴 We work hard — In-Office Monday–Friday + often push through weekends 🔴

Own design across Helium’s entire AI Experience generation product, including

Design and implement end-to-end user flows including…
Using Helium’s AI editor to generate new in-app experiences
Running experiments and automatically analyzing results
Receiving and critiquing auto-generated experiences
Help engineers think through UX challenges and critique / uplevel design generally
Build out a visual identity and a design system
Work directly with the founders to help build out our team.
Talk to customers every week about how to simplify and improve our product
Wearing a lot more hats than listed above 👷.

You should be a designer-who-codes (or an engineer with taste)

1-4+ years as a product designer, frontend engineer, or similar role combining design and implementation
Deep expertise in modern frontend technologies (React, TypeScript, modern CSS)
Excellent design taste and a keen eye for detail
Track record of making complex user flows intuitive (Making “The simple simple and the complex possible”)

Reasons This Role Might Not Be A Fit

You’d like to spend weeks perfecting every experience
You avoid Cursor or AI coding tools.
You don’t want to talk to customers or figure out the end-to-end plan for features.

Note

This is a full-time, in-person role based in San Francisco - we work from the office 6 days a week (Mon-Sat)
You must be based in the Bay Area or willing to relocate before starting.
We require US work authorization, but are open to O-1 visa sponsorship for truly exceptional candidates.

Our stack

Next.js (React/Typescript), Zustand
AI (vercel) SDK
Tailwind/Shadcn
Supabase
Clickhouse
Golang/Fly.io
Mobile: Swift, Flutter, Expo, Android

Requires Bachelors degree or higher in Computer Science or similar fields.

About Helium

Helium is building Self-Improving Software: AI that automatically generates & tests new software experiences to lift revenue. We’re…

Read the job posting on the Helium site

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Source: the Y Combinator job board. We last checked this job 3 h ago. We first saw it 4 days ago. A job on a job board does not always mean that the team interviews people now.

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Helium

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Compared with similar jobs

This base pay is below the median for software engineering jobs in the Bay Area with no level in the job title.

Median: $197K a year
Other jobs in the group: 2,424

We compare the middle of each posted range. This is base pay as posted. The group does not include this job.