Before you reach out.
Both — the systems above range from a brand-new build to an eight-year-old platform. What matters is whether it's a real operational problem, not the size.
That's most of what I do. I rebuilt NitroTickets on its live production database.
Both, depending on the project — some of the work above was built alongside a small team, some I own end to end.
Events and ticketing, healthcare, education, nonprofit, HR, food service, and B2B trading, each with a real system behind it — but that's a record of what I've shipped, not a limit on what I can take on. The underlying work is rebuilding and running business-critical software, and that isn't specific to any one industry.
I was the hands-on developer on both — I designed and built those systems. The case studies describe that work. Detail varies by engagement; it is not a claim that I hold a copy of any client's source code.