Founding Engineer ($130k + Equity) at Pre-seed Spatial AI Startup

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Job Title

Founding Engineer (Fullstack + Design)

Salary

$130k + Equity

Company Description

Pre-seed spatial AI startup building foundation models for the physical world

Job Description

You will join as a founding hire at a SF-based startup building AI that understands 3D space natively. You will own the end-to-end experience—designing complex interaction patterns for spatial data and shipping production code in TypeScript and React. This is a high-ownership role shaping the product's 0-to-1 trajectory.

Location

San Francisco, USA

Why this role is remarkable

• Rare opportunity to define the interface for a foundation model that processes 3D space the way LLMs process language.
• High-stakes ownership as a founding member where your design calls and code deployments directly shape the product's identity.
• Join an elite technical team in San Francisco focused on solving one of the most difficult remaining challenges in AI perception.

• Design and build the end-to-end platform experience, from spatial data interfaces to accessible developer APIs.
• Prototype and implement 3D visualization tools that help engineers and operators reason about complex physical environments.
• Work directly with founders to iterate on product-market fit, moving from initial concept to production-ready features rapidly.

• Proven experience as a product-minded engineer with 6+ years in SaaS, capable of moving seamlessly between Figma and VS Code.
• Strong technical foundations in TypeScript and React, paired with a portfolio demonstrating mastery over complex, data-heavy workflows.
• Startup-ready mindset with a preference for high ambiguity and a desire to wear multiple hats across design and engineering.

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 the job listing.

Step 2. Click 'Talk to Jack', or go straight there: https://www.jackandjill.ai/jobs/founding-engineer-130k-equity-at-pre-seed-spatial-ai-startup-3236d084-d5c4-4235-9e24-8f927847bff4?utm_source=linkedin&utm_medium=job_post&utm_campaign=featured_role_3236d084-d5c4-4235-9e24-8f927847bff4

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.