Kolomiiets Technical Inform

  🚀 What is Coinbase x402? x402 is a new open payment protocol built by Coinbase that revives the long-forgotten HTTP 402 “Payment Required” status and turns it into a modern, internet-native payment layer . Using stablecoins (such as USDC ) directly over HTTP, x402 allows services: APIs, websites, or digital content platforms to charge per request. At the same time,  clients (including AI agents and automated systems ) can pay programmatically , without accounts, subscriptions, or human interaction. In simple terms: request → pay → get response , all at the protocol level. How It Works (Simplified) A client requests a protected resource (API, data, article, service). The server responds with HTTP 402 Payment Required , including payment instructions. The client (app or AI agent) generates a payment transaction using its wallet. The client resends the request with payment details included in HTTP headers. The server verifies the payment and immediately ret...

The Azure Well-Architected Framework has always been a great way to assess and review workloads. But with the recent updates—especially the introduction of maturity levels —it’s becoming much more than just a checklist. 💡 It’s evolving into a concept. Not only can teams review their architecture, but they can now score, track progress, and continuously improve . The maturity model provides clear stages—from establishing a solid foundation to achieving future-proof agility—making it easier to understand where you are today and where you should aim tomorrow. Why is this important? ✅ It transforms reviews into a roadmap for growth ✅ It allows measurable scoring of architecture maturity ✅ It pushes teams to focus not only on compliance, but also on resilience, agility, and future-readiness Each update makes the Azure Well-Architected Framework better and stronger —helping organizations align technology decisions with long-term business success. 👉 In my view, this is the right dire...

I’ve seen it too many times: developers don’t know how to use logging correctly. We end up with tons of logs, everything dumped in, debug left in production, and  even API keys and secrets leaking out. Why does this still happen? Because we’ve slipped into LOP  (Logging-Oriented Programming) . Just throw in logs everywhere and hope: “we will see what happens here.” WHY WHY WHY!!! The real reason? Most of the time, we are just tired and don’t know how to debug locally. Maybe it needs a 3rd-party integration, maybe we can’t prepare the right data, maybe something else. I’m not asking you to “please use logs correctly.” If you need to debug your code, configure remote debugging or run it locally. So, just: 🚨 Do NOT use LOP. Be a good Software Engineer! 🚨

Reliability is a foundational pillar when building resilient systems, especially for critical components. Outages and malfunctions pose serious risks to any workload, so a truly reliable system must be designed to detect, withstand, and recover from failures within an acceptable timeframe. It must ensure continued functionality and maintain availability so that users can access services as expected, both in terms of uptime and quality. 🔧 Aligned with Azure’s Reliability Checklist Keep it simple and efficient Strive for a solution that meets requirements without unnecessary complexity—simplicity simplifies reliability Identify and prioritize flows Map out user and system flows, assess their criticality, and focus engineering efforts on those with the highest business impact Conduct failure mode analysis (FMA) Investigate every dependency and component with a methodical FMA to uncover weak points, and design mitigation strategies accordingly Define clear reliability and r...

Have you ever seen a fully implemented, truly and absolutely by-the-books REST API? With all the correct HTTP methods, status codes, and the perfect design? No? Me neither. And you might ask — why not? After all, it's supposed to be easy , right? Well, yes — technically, it is easy. But in real life, you always run into edge cases. Let’s take a simple example. According to REST principles, if you want to retrieve data, you should use the GET method. Simple and elegant, and documented everywhere. But then the question arises: how do you pass parameters in a GET request? Answer: via URL path or query parameters. But as you already know, there’s a limit to how much you can fit into a URL — usually around 2048 characters . That’s fine for small, basic queries. But what about advanced searches ? You want to pass dozens of filters , custom ordering , maybe even a list of IDs to fetch. Sometimes it’s a list of GUIDs — and not just one or two, but hundreds . In these cases, G...

Small and medium-sized businesses often face a common challenge: the absence of experienced cloud engineers. Due to limited resources, teams typically choose the quickest path—getting things done in the easiest, fastest way. Unfortunately, this approach often leads to solutions that aren't secure, cost too much, and become nearly impossible to extend or manage effectively. Recognizing this critical challenge, Microsoft Azure has developed the Well-Architected Framework. This comprehensive set of guidelines and best practices helps businesses assess their existing solutions and guides them toward building robust, secure, cost-effective, and manageable cloud infrastructures from the start. The Azure Well-Architected Framework is structured around five essential pillars: Cost Optimization : Ensuring that cloud resources are used efficiently and effectively, reducing unnecessary expenses. Operational Excellence : Focusing on the ability to run and monitor systems effectively, ensuring ...

I keep hearing, “You MUST start with a monolith.” Every new project? Always? When I hear that, two thoughts immediately come to mind:      1️⃣ “It depends.” You can’t just blindly say every project must start as a monolith.      2️⃣ My inner Dushnylo whispers: “Time to make a post about this.” So, here’s my take: I disagree. Not only do I disagree, but I believe the most critical and dangerous part of system design is analyzing and understanding business needs before making architectural decisions. Why? Simple. Imagine you’re building a streaming platform that processes massive amounts of data, handles notifications, and integrates with third-party services. Does this sound like something you’d build as a pure monolith? Of course not. But I do agree on one thing—you have to start somewhere. That starting point could be a simple core application —yes, it might look like a monolith at first. But you’re not designing the entire system as a monolith. ...