CTO Co-Founder
Department: CTO (Portco)
Location: San Francisco, New York City
Employment Type: FullTime
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 lage-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.
There are more than 50,000 engineering jobs:
Subscribe to membership and unlock all jobs
Engineering Jobs
60,000+ jobs from 4,500+ well-funded companies
Updated Daily
New jobs are added every day as companies post them
Refined Search
Use filters like skill, location, etc to narrow results
Become a member
🥳🥳🥳 452 happy customers and counting...
Overall, over 80% of customers chose to renew their subscriptions after the initial sign-up.
To try it out
For active job seekers
For those who are passive looking
Cancel anytime
Frequently Asked Questions
- We prioritize job seekers as our customers, unlike bigger job sites, by charging a small fee to provide them with curated access to the best companies and up-to-date jobs. This focus allows us to deliver a more personalized and effective job search experience.
- We've got over 200,000 jobs from 15,000+ vetted companies. No fake or sleazy jobs here!
- We aggregate jobs from 15,000+ companies' career pages, so you can be sure that you're getting the most up-to-date and relevant jobs.
- We're the only job board *for* software engineers, *by* software engineers… in case you needed a reminder! We add thousands of new jobs daily and offer powerful search filters just for you. 🛠️
- Every single hour! We add 2,000-3,000 new jobs daily, so you'll always have fresh opportunities. 🚀
- Typically, job searches take 3-6 months. EchoJobs helps you spend more time applying and less time hunting. 🎯
- Check daily! We're always updating with new jobs. Set up job alerts for even quicker access. 📅
What Fellow Engineers Say