Selection of books, articles, podcasts and guides I have read and shaped me into who I am.

Software Design
Aa a Rails developer I respect their doctrine of not falling into one paradigm. So I like reading about all kinds of styles. I don't agree with all of them but I like knowing and understanding them well.

• Practical Object Oriented Design in Ruby: basics of OOP
• 99 bottles of OOP: basics of SOLID
• Effective Java: basics of design patterns
• Sustainable Web Development with Ruby on Rails: opinionated way of organising Rails deviating from OO in favor of Procedural (Service Objects)
• On writing software well: DHH's vision on how to apply and extend Rails
• Code I like: how code at Basecamp looks (by Jorge)
• Martin Fowler: general software design, architecture
• Kent Beck: general software design, architecture
• Gitlab guides: collection of very detailed and high quality guidelines
• Gitlab repo: a repo you should have locally to refer to
• Thoughtbot guides: a good collection of guidelines
• Evil martians: many interesting articles
• Grug Brain: an ode to simplicity
• Code with Jason podcast: many interesting interviews with prominent Rails developers

Leadership, management, organisation
Leadership is best thought by doing. But reading helps you find the right ideas at the right time.

• The Staff Engineer's Path: basic introduction to the IC leadership track
• Rand's Slack: goldmine on any tech leadership topic
• BDD workshop by Gáspár Nagy: workshop that thought me about discovery, example mapping and BDD
• Leadership workshops by TPC: basic introduction workshops to leadership
• Startup CTO Handbook: survival guide on being a CTO
• Shape Up: an alternative to SCRUM focussed on fixed-time variable-scope projects
• Alex Komoroske: a Product Manager with very flavored ideas
• The Rework Podcast: insight into how Basecamp leadership works
• Thierry de Pauw: a colleague with interesting ideas
• Dave Farley: ideas on tech leadership
• The Phoenix Project: a classic IT tale
• The five dysfunctions of a team: a classic leadership book
• Radical Candor: a book on management, also great podcasts

Academic books
Many of these books are probably a bit outdated but still offer some insight into basic Computer Science principles.

• Pattern Recognition and Machine Learning: theoretical basics of Machine Learning
• Engineering Software as a Service: basics on SaaS
• Introduction to Algorithms: classic Algorithms explained
• Principes van databases: theoretical basics of database (design)
• Building Scalable Web Sites