- Sidekiq—source and documentation: https://github.com/mperham/sidekiq
- Ruby on Rails: https://rubyonrails.org
- Unicorn: https://thorstenball.com/blog/2014/11/20/unicorn-unix-magic-tricks/
- Cloud Native programming with Golang by Mina Andrawos, Martin Helmich: https://www.packtpub.com/in/application-development/cloud-native-programming-golang
- Nginx HTTP Server - Fourth Edition by Clement Nedelcu, Martin Fjordvald: https://www.packtpub.com/in/virtualization-and-cloud/nginx-http-server-fourth-edition
- Mastering Redis by Jeremy Nelson: https://www.packtpub.com/in/big-data-and-business-intelligence/mastering-redis
- PostgreSQL Administration Cookbook, 9.5/9.6 Edition by Simon Riggs, Gianni Ciolli, Gabriele Bartolini: https://www.packtpub.com/in/big-data-and-business-intelligence/postgresql-administration-cookbook-9596-edition