Books:

• Clean Code: A Handbook of Agile Software Craftsmanship Robert C. Martin Published by Pearson
• System Design Interview – An insider's guide, Alex Xu
• VPNs Illustrated: Tunnels, VPNs, and IPsec By Jon C. Snader

Articles:

• Stop using the elbow criterion for k-means and how to choose the number of clusters instead by Erich Schubert
• Machine Learning with PyTorch and Scikit-Learn by Raschka et al

Blog Posts:

• https://medium.com/@techworldwithmilan/most-common-software-architecture-styles-86881d779683

Proffesional Courses:

• Red Hat Certified System Administrator
• Red Hat OpenShift I: Containers & Kubernetes