Senior versus junior use of AI

0:05 With AI generating full-stack code bases in a matter of seconds, does the gap between junior and senior engineers still exist? It is a fair question, but the gap hasn't closed. It has just moved. Here's what's actually happening. If you ask an AI agent to build a full-stack application today, it will happily write 2,000 lines of custom session management, bespoke JWT logic, and complex database triggers from scratch. A junior developer looks at that and thinks it's a superpower.

0:36 A senior engineer knows it's a maintenance nightmare. Just because an AI can build custom infrastructure, doesn't mean it should. When you let AI reinvent the wheel, you end up maintaining a massive, undocumented security system that you didn't even write. In 2026, the job of a senior engineer is no longer writing syntax. It's orchestrating systems. We don't let AI hallucinate infrastructure. We give it the tools to provision industry standards. And that, my friends, is the difference between a junior and a senior engineer building today.

1:14 To show you exactly what that looks like, we are going to build this. This is Splitter AI. A full-stack split-wise clone. It features complex group permissions, secure user management, and an AI-powered graph algorithm that automatically simplifies and minimizes shared debts between friends. It also has AI-powered features, so you don't have to manually enter every single expense, but let AI do the magic. An application like this used to take a team of developers a month to architect.

1:50 I built it on my own in less than a day. And by the end of this video, you will have it too. And don't worry, even though we are dealing with heavy math and advanced architecture, if you understand basic JavaScript and React, you'll be able to follow this exact workflow step by step. And if you don't know React, then take a look at the link in the description below for a basic React course and get back to this video.

2:15 That course is completely free. If you don't know React, then you can take a look at the link in the description below for a free basic React course.