About Daily Dejavu

Who We Are

Daily Dejavu is a technical tutorial platform built for developers and security professionals who want more than surface-level content. Every article on this site comes from direct, hands-on experience — the kind you pick up from running production systems, hunting vulnerabilities at 3 AM, and debugging problems that Stack Overflow doesn’t have answers for.

We don’t recycle documentation. We don’t rewrite what you can already find in the official docs. If it’s on this site, it’s because we ran into it ourselves, figured it out, and decided to write it down so the next person doesn’t have to start from scratch.

The Name

“Dejavu” — that feeling when you see something and you’re sure you’ve seen it before. That’s what good learning does. You read a tutorial, you build something with it, and weeks later when you hit a similar problem, it clicks instantly. You’ve been here before. You know exactly what to do.

That’s the goal. Every tutorial is designed to create that moment.

What We Cover

We focus on five core areas:

Backend Engineering — API design, server architecture, authentication systems, and building things that don’t fall apart under load.
Cyber Security — Penetration testing, vulnerability research, network hardening, and the offensive/defensive mindset that comes from doing this work professionally.
DevOps & Infrastructure — Docker, Kubernetes, CI/CD pipelines, and the infrastructure layer that keeps everything alive.
Database Systems — PostgreSQL, MySQL, Redis, MongoDB, and the hard trade-offs behind choosing and optimizing the right datastore.
Linux & Networking — Shell scripting, system internals, TCP/IP, firewalls, and the foundational layer that every serious developer needs to understand.

How We Write

Every tutorial on Daily Dejavu follows a few rules:

Start with the problem, not the tool. We explain why you need something before showing you how to use it.
Show real code, not toy examples. The examples in our tutorials are based on actual production scenarios, not simplified demos that break the moment you try to adapt them.
Explain the “why” behind every decision. Knowing what to type is easy. Knowing why you’re typing it is what separates someone who follows tutorials from someone who can solve problems on their own.
Keep it honest. If something has trade-offs, we’ll tell you. If a tool is overhyped, we’ll say that too. No sponsor-driven recommendations, no affiliate bias.

Behind the Site

Daily Dejavu is built and maintained by a cybersecurity professional with deep roots in backend development and infrastructure. This isn’t a media company with a team of content writers — it’s one engineer sharing what they’ve learned from years in the field.

If you want to get in touch, head over to the Contact page.

Building things that work. Breaking things that shouldn’t. Writing it all down so you don’t have to figure it out the hard way.