It’s an easy trick: they just check the domains of the email addresses of people who created an account and display the logos of the high profile ones.
Worst case they are going to get a legal email from those companies to remove the logos.
When I worked at one of the large startup company, we all were submitting various websites to our legal department to remove our logo.
I own B2B business, just never felt confident to ask other businesses if that is ok to show theirs logos, so don’t show any. Probably a miss of opportunity.
Writing Solid Code by Steve Maguire - 245 pages but really well written and an enjoyable read. Examples in C but principles are applicable with any language.
I've been there! I definitely felt the same 4-5 years ago after 15 years as a software developer. I then changed to a support engineer position on a product for software developers (i.e. Travis CI). And it was amazing! All I was doing all day was troubleshooting/debugging customer issues. Given my background as a dev, I could dive into the codebase when needed and also look at the logs and metrics to understand what was happening. I also had the chance to code some tools to help deliver a better support experience (e.g. Slack bots, admin dashboard). This is definitely my new calling and I'm currently looking for a new position on a similar product after a rewarding 4+ years at Travis. Hope this helps!
