Tutorfair is the leading tutoring marketplace in the UK. It started out modestly in its CEO's attic and is now a thriving 15-people company that connects more tutors and clients than any other tutoring business in the country. The technology had to be custom-built to accommodate for all the use-cases of running a tutoring business and for clients to manage their tuition.
I had the chance of joining Tutorfair just after the company's creation and be their primary developer. I built their development team alongside their technical stack and had the opportunity to train several young developers.