Facebook, Apple, Microsoft, Amazon, Netflix, and Google.<p>Interested in the opinions of people who work there, as well as those who don't.<p>Best may have different interpretations, so interested in knowing about your criterion for selecting the best as well.
Netflix has open sourced a lot of code that you can look at.
Hysterix, Eureka, Titus, etc.
Disclaimer, I worked on open sourcing Titus and I think it has some great Java code.
I really like this <a href="https://github.com/awslabs/aurora-snapshot-tool" rel="nofollow">https://github.com/awslabs/aurora-snapshot-tool</a><p>It's a small and simple codebase, that implements a cross account DB backup capability on your AWS deployments.<p>I think it's an example of wonderfully written infrastructure python code, clear, concise and very easy to understand as a result.
- Zstd compression, fb<p>- Brotli compression, google<p>- Clickhouse (highly efficient OLAP db), yandex<p>- ESBuild (extremely fast js bundler), figma<p>- TailwindCSS (rapid css styling made ez)<p>- Caddy (nice auto-ssl for the lazy, also nice proxy)<p>- HAProxy (highly configurable proxy/lb)<p>- uWebSockets (highly performant web server with websockets; used by bitfinex, kraken, trello; has uWebSockets.js api for nodejs)
Found this, simple and seems interesting: <a href="https://github.com/google/diff-match-patch" rel="nofollow">https://github.com/google/diff-match-patch</a>