Job Details

Join to apply for the CTO Co-Founder role at Cold Start

Cold Start Ventures is looking for exceptional CTO co-founders to lead new companies in our portfolio. Each venture is backed by tier-1 VCs with $1.5M+ in committed day‑one capital. You'll join as a true co-founder — with the equity, influence, and expectations that come with it. If there's a fit, you'll hear from us within 24 hours.

At Cold Start, we incubate companies at the intersection of healthcare and AI, built around deeply researched, conviction‑driven theses. To date, our team has helped create over $2B in portfolio value, including breakout successes such as 3Y Health and Berry Street. Our ventures benefit from a tested playbook that drives a 6× higher survival rate to Series B than the industry average.

What We're Looking For

• Former founders only – we look EXCLUSIVELY for those who have started companies before
• Structured training – experience in top‑tier engineering environments (Big Tech or large‑stage startups)
• Elite education – Undergrad CS or related degrees from top 20 universities
• Bias toward action – hungry, resourceful, and relentlessly execution‑oriented

Why Cold Start?

• $2B+ portfolio value created – built scale companies like 3Y Health, Berry Street
• $1.5M+ seed capital on day 0 – you don't need to bring your own thesis or investors
• True co‑founder of the business – your voice, equity and contributions will be that of a true co‑founder
• 6× survival rate to Series B – our playbook consistently outperforms industry averages

What You'll Do

• Join an existing Cold Start venture as CTO and co‑founder
• Prototype and launch the product, leveraging our playbook and technical resources
• Recruit and lead a world‑class team
• Build a category‑defining company with enduring impact

We are in‑person out of SF and NYC.

San Francisco, CA