Every time you click 'Sign in with Google' or a system calls an API using a token, OAuth 2.0 is at work. This post explains what OAuth 2.0 actually does, how the key flows work, what OpenID Connect adds on top, and how JWT ties it all together — in plain English without the specification language.
REST API design principles have been the foundation of web APIs since 2000 — and they have not changed. This post explains the core principles clearly: resources, HTTP methods, statelessness, status codes, versioning, and idempotency. Whether you are building your first API or reviewing a design, this is the reference you will come back to.
Containers changed how software is built and deployed. Docker made containers accessible. This post explains what containers are, what problem they solve, how Docker works, and why this matters for anyone working in cloud platforms including SAP BTP — without becoming a command-line tutorial.
XML is a data format, not a programming language. This post explains what XML is, how it works, and the five places you will still find it in SAP landscapes in 2026.
Never lost your code to a bad edit? Never wished you could just go back to the version that worked? That is exactly what Git solves. This guide explains Git, GitHub and VS Code in plain English — what each tool does, how they work together, and how to set everything up from scratch. Includes a full command reference, branching explained simply, real workflow scenarios, and answers to the most common questions developers ask. Whether you are writing your first line of code or refreshing your fundamentals, this is the guide you will come back to.
DNS translates domain names into IP addresses. This post explains how the lookup chain works, which DNS records matter and what breaks when DNS goes wrong — no jargon.
HTTPS is more than a padlock. This post goes deeper — into certificate chains, certificate authorities, TLS 1.2 vs 1.3, and the handshake that happens before any data flows.
Every time you see the padlock in your browser, HTTPS is at work. This post explains what HTTPS is, how TLS makes it secure, what a certificate actually does, and why HTTP alone is never enough — all in plain English without the cryptography deep-dive.
An API is how software systems talk to each other. This post explains what APIs are, how requests and responses work, and the REST, GraphQL and OData types you will encounter.
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