Hey HN! I'm working on Voop - a b2b phone network, leveraging eSIM & web-based UI we're turning company mobile connectivity into a SaaS. Has been really fun as an engineer getting into the telco stack - networks, switches and traffic routing take me back to university - and commercially it's been fun negotiating with the mobile networks to get wholesale access. Launching later this year in the UK and US next year, can't wait to get it off the ground.
One early achievement was buying voop.com - a very nice man in Arizona had held it since the 90s, and despite being retracted on whois, i worked out how to contact him via his custom ssl certificate on the empty holding site parked at the root domain. After a few emails and follow ups to get a response, I bought it for a not-cheap-but-not-bank-breaking amount.