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If you've ever built a web application or configured Spring Security, you've almost certainly encountered Cross-Site Request Forgery (CSRF). In my previous guide, How OAuth 2.0 Works: A Practical Guid

Reading PDF documents for long periods can become tiring, especially when the document contains bright backgrounds or when you're working in a low-light environment. In other situations, designers, de

When a workflow has more permissions than it needs, a simple build job can become a path to repository changes, token misuse, or a wider blast radius than the team intended. The problem is easy to mis

Imagine asking an AI assistant to de-identify thousands of medical images. It runs the pipeline, tracks progress, summarizes every decision, and tells you which files need human review, all without ev

Imagine you're building an e-commerce platform where placing an order needs to trigger several things at once: the warehouse has to be told to prepare the shipment, the email service has to send a con

Most Flutter tutorials stop at network calls and REST APIs. The moment you need to talk to a physical device, a heart rate monitor, a smart bulb, a fitness tracker, an industrial sensor, or your own c

We just published a brand new course on the freeCodeCamp.org YouTube channel that will take you from an absolute beginner to a Claude Code master. Whether you want to automate your development workflo

A couple of months ago, I went for a 10K run with three different devices on me. Why? Another long story of review deadlines and my own procrastination. By the time I was done with my run and got back

Ask someone what a QA engineer does, and you'll probably hear a familiar answer: "They test software and find bugs." It's a common perception, and to be fair, finding bugs is an important part of the

As software developers, we're usually taught to prioritize features like speed, performance, and uptime. When we build APIs, our core concern is making sure data gets from Point A to Point B smoothly.

Before I had ever heard the term "HIPAA audit", I spent three days helping a healthcare SaaS startup fix a single misconfigured S3 bucket. Not a breach — nothing was accessed. But the bucket was publi

If the exact same quantum circuit works perfectly in a simulator, why does it often produce different results on a real quantum computer? That question catches almost every quantum developer by surpri

You push your code. A few minutes later, it is live for real users. Between those two moments runs a long chain of machinery: builds, artefacts, migrations, health checks, traffic shifts. Every produc

Most SaaS landing pages share the same core sections: a hero, social proof, features, pricing, FAQ, and a footer. And most developers end up building these from scratch on every project. That's repeti

Most marketing landing pages start with the same problem: you're staring at a blank screen and rebuilding sections you've already created countless times. A hero section, feature grid, testimonials, p

You ask ChatGPT a question. It answers. You ask another. It answers again. That back-and-forth has been the standard way most people experience AI: a smart, fast assistant that responds when spoken to

We are rapidly moving past standard, single-prompt Large Language Models and entering the era of autonomous AI agents. To help you master this new paradigm, we have just published a massive, comprehen

For data science leaders and product managers who are overseeing multi-model gateways, the standard regression approach to measuring model quality is fundamentally flawed. You're running a causal infe

Kubernetes ships with controllers that manage a fixed set of built-in resources: Deployments, Services, Nodes, and so on. An operator extends the same pattern to resources Kubernetes doesn't know abou

SmartDocs is an open-source Markdown documentation with built-in AI chat. The pitch: write docs in Markdown, add your API key to .env, and every page gets a grounded AI assistant. Self-hosted, your data, your control. Tech: Next.js + Markdoc + Tailwind. No vector DB — uses graph-backed retrieval (keyword scoring + link traversal) inspired by Karpathy's LLM Wiki pattern. Live demo (no key needed): https://www.getsmartdocs.xyz GitHub: https://github.com/jm27/smartdocs Been building t...

The fight was always the same: "I do way more around here." "No you don't." Neither of us could actually prove anything, so it just went in circles. I'm a developer, so instead of winning the argument I did the reasonable thing and spent way too long building an app about it 😅 It's called HouseHarmony. You create a household, invite whoever you live with, assign chores (or split them), and set the ones that repeat so nobody has to remember them. There's a weekly leaderboa...

My site is www.jimmysdealfinder.com - it finds deals on Pokemon cards on eBay by comparing listing price to historical card values. I've been running it since October 2024 and it makes money through affiliate links, which is always enough to cover the hosting/API costs with some profit each month. However, nobody ever used the donation link on the page until today. I just got a £10 donation from someone I'd been talking to on reddit who was helping me with ideas for the site. It was great ...

I wanted a DB GUI that lives in the browser and isn't locked to one engine postgres, today, redis or mongo tomorrow, same UI, on my own network(on-prem, PaaS, docker, k8s etc..) Most options I knew fell into one of these: - Desktop multi-DB (DBeaver / DataGrip) solid, but install + desktop-only - Web but single-engine (phpMyAdmin / pgAdmin) - Web multi-engine, with the interesting bits behind Pro/Enterprise So I built LibreDB Studio (been at it ~a year): MIT, web/mobile-native, SQL + N...

I've spent the past year building what I believe to be a highly comprehensive investment research and tracking platform . As an avid investor who incorporates a few strategies for investing (index investing, factor tilts, some quality stocks at good valuations, a bit of dividends), I was continuously jumping between different websites and tools for different needs, most of which were missing the exact thing I needed. I wanted one place which had visual representation of stock fundamentals wit...

Hi travellers, I'm a traveller myself that everytime a want a new destination I get into the same problem. Basically, hopefully not only myself, I have a lot of saved videos on tiktok/reels or even youtube with destinations, attractions etc and beside this a lot of other crap and I lose a lot of time just searching for these videos and sorting them. Now I'm a solo developer too and I got an idea, I thought to create a mobile app and while scrolling on different platforms instead of you saving th...

Hey everyone. I'm building an app called Merios and I'd love an honest gut check from this sub before I push it further. Quick version of what it does: you upload your bloodwork (any lab PDF, or even a photo of a printout), and it reads every marker for you against optimal ranges, not just the "in range / out of range" your doctor hands you. Then it pulls in your wearable data (Apple Watch, Oura, Garmin, Whoop) and how you've actually been feeling day to day, and tries to line all th...

My wife is on an iPhone, I'm on a Galaxy. We kept losing track of household stuff — who's buying what, whose turn it is, when a bill is due. We tried the obvious things: - Todoist / TickTick: great apps, but sharing is a workspace feature layered on top of a personal to-do app. Felt like using a project management tool to ask someone to buy milk. - Notion: we both stopped opening it within a week. - Apple Reminders: my Galaxy doesn't exist as far as it's concerned. The specific thing I w...

Every developer has code they'll probably never touch again. The half-finished CLI from a weekend. The tutorial project that stopped halfway through. That weird experiment that actually taught you something. The utility script that's ugly but gets the job done. Most of that code just sits on a hard drive until it's forgotten. I started The Open CodeYard, a GitHub repository for unfinished, experimental, and abandoned projects that are still worth preserving. Not because they're perfect, bu...

Curious what made the difference for people who actually shipped something versus the projects that quietly died after a few weeks. Was it a specific habit, a deadline, having someone else involved, or something else entirely? And what's a side project you gave up on that you still think about?