Founding Engineer ($200K – $250K + Up to 1% Equity) at YC-backed AI GTM startup Full Time

About the job

Job Title: Founding Engineer

Salary: $200K – $250K + up to 1% equity

Company Description: YC-backed AI go-to-market startup, SF, rapid early traction

Job Description: Join a founding team of repeat YC founders who have built and sold before, with their last company acquired by an $80B enterprise. They raised $6M from top investors including YC and notable angels, hit strong early revenue traction faster than almost any company at their stage, and are already trusted by dozens of top YC companies to run their outbound. They are now hiring their first engineers to build the core AI agent infrastructure. This is a seat at the founding table, not an IC role at a growth stage company.

Location: San Francisco, CA (Union Square), 5 days a week in-office

Why this role is remarkable:

• Build AI agents that replace the need for 10 plus tools and a dedicated GTM engineer, at a company that already has product market fit and paying customers who depend on it every day
• Join 2x YC founders with a proven track record of building and selling companies, backed by top angels including CEOs of companies you know, at the earliest and most impactful stage possible
• Own the entire technical surface from day one, shape the product direction directly with the founders, and hold founding engineer equity in a company growing faster than almost anything at its stage

What you will do:

• Architect and build AI agents that discover hyper-targeted leads by understanding ideal customer profiles, conference attendees, hiring signals, and real-time behavioral data across social platforms
• Build multi-channel sequence orchestration across email and LinkedIn, managing dozens of email domains and sender accounts at scale, with beautiful and intuitive interfaces on top
• Work directly with customers, iterate fast based on their feedback, and own critical systems that drive real revenue outcomes for a growing base of high-signal companies

The ideal candidate:

• 0 to 4 years of fullstack engineering experience at a B2B SaaS company or high-growth VC-backed startup, with hands-on experience building AI and LLM-powered products in production, and a CS degree from a strong program
• Strong fullstack ability across TypeScript, React, Next.js, and Python, with genuine systems thinking around distributed systems, concurrency, and performance, plus signals of exceptional technical ability like Olympiads, RSI, or competitive programming
• High agency and ownership, someone who identifies problems and solves them without being asked, not a frontend-only engineer, not someone who needs step-by-step direction, and not someone coming from a slow-moving large enterprise

Next steps

1. Apply via this LinkedIn job post
2. We’ll review and reach out if there’s a strong match
3. If aligned, we’ll introduce you directly to the team

If this role isn’t the right fit, we may suggest and make introductions to other high-signal startup roles we’re recruiting for – always with your permission.

A quick note on authenticity

This is a real, active role we’re supporting in partnership with the hiring team. We don’t post speculative roles and work closely with teams on their actual hiring needs.