Looking at Triplebyte's "about us" page, it appears that their engineering team is 100% male. This should be a big red flag for any company trying to get diverse engineering team - why work with a company that doesn't hire women engineers?
The "pipeline problem" doesn't exist. The "we're too small to do that" problem doesn't exist.
You know what does help? Recruiting at places other than the Stanford CS job fair. Partnering with mentorship organizations. Sponsoring or hosting events that show off your company to people who aren't Stanford CS students. I could go on and on.