When I was working with AiLink, an early stage startup, I was tasked with re-designing the Unilink app, which helps students and young professionals find apartment units to rent as well as potential roommates.
I was the first and only designer at the company, so the re-design was practically starting everything over from scratch. I interviewed people, mapped out architecture of the app, tested ideas with lo-fidelity design, defined style guide with typography and colors, built components library, made high-fidelity design and interactive prototypes.
Tip: You can go to "Pages" from left panel to check out components, icons, style, etc. on other pages)