Most people learn Git backwards. They get a list of commands to memorise — git add, git commit, git push — and then spend months not quite understanding why things work or why things go wrong. This post does it differently. It builds the mental model first. Once you understand what Git is actually doing, the commands stop being a checklist and start making sense on their own.
REST APIs wait to be asked. Webhooks tell you the moment something happens. This post explains the push vs pull difference, when to use each, and what can go wrong.
SQL has been the language of data for over 40 years and it is not going anywhere. This post covers the fundamentals — SELECT, WHERE, JOIN, GROUP BY, subqueries and more — with real examples, clear explanations and the SAP angle. A reference whether you are writing your first query or just need a quick refresh.
SQL and NoSQL databases solve different problems. This post explains the relational model, the four NoSQL types, and how to choose the right database for your use case.
APIs are one of the most targeted attack surfaces in modern software. This post covers the essentials every developer and architect needs to know — API keys, OAuth tokens, rate limiting, input validation, and the OWASP API Security Top 10. A practical reference whether you are building, reviewing, or securing APIs.
JSON is the universal language of APIs and data exchange. Whether you are reading an API response, writing a config file or working with SAP BTP, you will encounter JSON every day. This post covers everything you need — data types, structure, nesting, arrays, common mistakes and real-world examples — to go from beginner to confident.
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.
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