Founding Member (Sales and Growth)

Co-Founder, Growth & Sales
Thirdline | An Entrext Company
Equity only | Founder role | Remote
Thirdline is built on a simple thesis:
People don't need more networking. They need the right person with the exact knowledge to solve the bottleneck.
We're building a network where people discover hyper-specific opportunities based on what they need and what they can offer in return.
Swipe on an exchange. Match with the right person. Connect 1:1. Make the exchange happen.
You just got a deal made.
Who we're looking for
We're looking for a Co-Founder who owns Growth & Sales at Thirdline.
Not someone who wants a growth role.
Not someone looking for a salary and a set of targets.
We're looking for someone who believes in the thesis enough to make it their own.
You will own the commercial side of the company from day one:
Figure out who should be on Thirdline first
Define and continuously refine our ICP
Build the first network from zero
Talk to founders, operators and potential users every day
Develop the acquisition and distribution strategy
Own outbound, partnerships, community and other growth channels
Turn conversations into actual exchanges and deals
Understand why people join, why they don't, and what makes them come back
Build the systems that can eventually make growth repeatable
Work directly with the product side to turn market feedback into product decisions
Eventually build and lead the growth/sales function
There is no playbook. You will be expected to create it.
The reality of the role
This is an equity-only founding role. There is no cash compensation at the beginning.
Thirdline is being built with the expectation that the company should earn its way forward, rather than depend on continuous capital injections.
Initial resources will primarily go toward product and domain infrastructure.
There will not be a large marketing budget waiting for you.
If we discover real traction and a strong opportunity to scale, funding can be considered. But we are not raising money simply to manufacture growth.
You should be comfortable building with constraints.
What we're looking for
You don't need to have worked at a big company.
We care much more about whether you can:
Sell something you genuinely believe in
Start conversations with strangers
Find the right people without being handed a list
Understand a market by talking to it
Create opportunities from nothing
Experiment quickly
Take ownership when something isn't working
Think commercially, not just operationally
Build relationships that turn into actual outcomes
Operate without needing constant direction
Most importantly:
You should believe that the thesis is worth spending the next few years building around.
If you think Thirdline could become the place where people go when they have a specific bottleneck and need the right person, not another LinkedIn connection, we want to talk.
What you'll get
Co-Founder status
Meaningful founder equity
Full ownership of Growth & Sales
Direct involvement in company and product decisions
The opportunity to build the commercial engine from zero
A company being built inside Entrext, a venture studio that helps companies go from thesis to market
About Entrext
Entrext is a venture studio that looks for the right people to make companies go from thesis to market.
Thirdline is one of those companies.
This isn't a job you're applying for.
It's a company you're choosing to build.
Equity only. Founder role. Build from zero.

Work arrangement
No