Founding Product Engineer ($130K-$160K + 0.20%-0.40% Equity) at Asteroid – YC-backed AI Agent Startup Full Time

She will pick the best candidates from Jack’s network.

The next step is to [speak to Jack](https://jackandjill.ai/jack/job-listing?utm_source=job_listing&utm_medium=job_board&utm_campaign=b2bf6098-f892-480c-af67-0958bb5310a6).

• Title:** Founding Product Engineer ($130K-$160K + 0.20%-0.40% Equity) at Asteroid – YC-backed AI Agent Startup

Job Title

Founding Product Engineer

Salary

$130K-$160K + 0.20%-0.40% Equity

Company Description

Asteroid – YC-backed startup building browser-based AI agents

Job Description

You will invent new design paradigms for human-agent supervision at scale. As a founding engineer, you’ll own the entire user experience from greenfield design systems to mission-critical browser agent interfaces. This role is for a product-obsessed builder with elite taste who wants to define how the world interacts with the next generation of AGI.

**Location:**

San Francisco, USA

Why This Role Is Remarkable

• Shape the interface of the future by designing how humans supervise agent workforces across complex, exception-heavy healthcare and enterprise workflows.
• Join a world-class founding team backed by Y Combinator (W25) and top angels from OpenAI and Hugging Face in a high-growth environment.
• Enjoy complete greenfield ownership over the platform’s UX and design system, moving far beyond simple chat windows into novel AI-native interactions.

What You Will Do

• Build and own the end-to-end platform UX, including a unified design system and core frontend features using TypeScript and Go.
• Drive user adoption by conducting interviews, reviewing PostHog sessions, and iterating on onboarding to make complex agent executions intuitive.
• Function as a full-stack owner, building features from backend infrastructure to polished landing pages and customer-facing tools.

The Ideal Candidate

• Has 3+ years of experience shipping B2B products used by thousands of users with a strong portfolio of high-quality frontend work.
• Possesses incredible visual taste and Figma fluency, balancing perfectionism with the pragmatic need to ship rapidly in a startup environment.
• Demonstrates an AI-native mindset with the ability to manage customer accounts directly and translate feedback into high-impact platform improvements.
• Who are Jack & Jill?**

Ok, I’ll go first. I’m Jack, an AI that gets to know you on a quick call, learning what you’re great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I’m Jill, an AI Recruiter who talks to companies to understand who they’re looking to hire. Then I recruit from Jack’s network, making an introduction when I spot an excellent candidate.

**Next steps**

Step 1. Visit **[our website](https://jackandjill.ai/jack/job-listing?utm_source=job_listing&utm_medium=job_board&utm_campaign=b2bf6098-f892-480c-af67-0958bb5310a6)**.

Step 2. Click **’Talk to Jack’**.

Step 3. Talk to Jack so he can understand your experience and ambitions.

Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.

Step 5. If Jill thinks you’re a great fit and her client wants to meet you, they will make the introduction.

Step 6. If not, Jack will find you excellent alternatives. All for free.

**We never post fake jobs**

This isn’t a trick. This is an open role that Jill is currently recruiting for from Jack’s network.

Sometimes Jill’s clients ask her to anonymize their jobs when she advertises them, which means she can’t share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn’t much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we’re giving his services away for free.