Yevhenii Chernyshov

🌀 What’s really happening in .NET today? We’re not talking hype. This is hands-on insight from someone who just migrated a production project to .NET 8. We spoke with Yahor Halubchyk, a senior .NET engineer at Vention, to get a grounded take on current trends, migrations, and what’s worth paying attention to. ⚙️ .NET 8 has become the default. It’s stable, fast, and LTS-backed. Upgrading from earlier versions is usually a matter of days. As for .NET 9 — most teams are skipping it and waiting for 10, which promises smart memory handling and auto-optimizations for collections and performance. 🧱 Still on .NET Framework? Brace yourself. If your project’s on modern .NET (formerly Core), migration is straightforward. But if you're stuck on .NET Framework 4.8, you're likely looking at a full rewrite. The architecture is different, and most libraries just won’t work out of the box. 🧩 Third-party libraries are the real bottleneck. Yahor put it simply: “If you're on the standard Microsoft stack, migration is smooth. But if you’re using MongoDB, niche ORMs, or older open-source packages, expect to dig through source code and open GitHub issues.” 📉 Blazor and Razor? Still niche. They’re rarely used in production. React and Angular dominate the frontend. Blazor might work in edge cases, like when sensitive business logic has to stay server-side, but it’s not the go-to. 🤖 AI + .NET: not just buzz — it’s useful. GitHub Copilot struggles with complex logic. But GPT-4? Surprisingly solid. Yahor’s team uses it to generate SQL queries, unit tests, and advanced search logic, especially when given proper context. 🧠 .NET itself? It’s more than a language — it’s an engineering mindset. Think architecture, optimization, concurrency. The learning curve is steep, but so are the opportunities. As Yahor puts it: “If you have real experience, you can jump straight into a project and deliver. For juniors, we offer solid growth.” 📌 We're hiring: 🔹 Senior .NET Developer — https://lnkd.in/digGyN3s 🔹 Intern .NET — https://lnkd.in/dqAM8NPQ

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💣 Uploading large videos on mobile is deceptively hard. App backgrounding, network interruptions, and retries all make for a fragile user experience. In this guest post, Petr Chalupa (STRV, React Prague) explains how Boom re-engineered its upload pipeline using Expo Modules for native background uploads with AWS S3 multipart support. The results: ♢ 20% faster end-to-end uploads ♢ Reliable performance across 100–300MB clips ♢ Zero “stuck” uploads in tests He shows all the code in the post right here: https://lnkd.in/gD82cjmN

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Time for the next speaker at WarsawJS Meetup #133 - meet Szymon Chmal! 🛠️ Write Once, Test Everywhere: Cross-Platform Testing for React Native 💡 Testing React Native apps has always been a trade-off between speed and realism. Jest is fast and excellent for unit tests, but it runs in Node.js and relies on mocks for native modules. End-to-end frameworks offer realism, but at the cost of complex setup, slow pipelines, and high maintenance. Szymon Chmal will introduce React Native Harness, a new testing framework that lets you run Jest-style tests directly on real devices and simulators, with full access to native modules and no mocks by default. This is a game changer for cross-platform testing! Szymon Chmal is a React Native expert at Callstack and creator of the Rozenite and React Native Harness frameworks. He is also a Microsoft MVP in Web Development. He focuses on cross-platform development and building tools to make life easier for developers. He is the founder of GDG Toruń. ⚡ WarsawJS Meetup #133, December 9, 2025, 6:30 PM DataArt Warsaw, WeWork, Mennica Legacy Tower, West Building ul. Prosta 20, 00-850 Warszawa, 1st Floor, Room 01C Tickets: https://lnkd.in/dyf3ji8e Sponsors: Xfaang, DataArt Media Partner: K MAG Partners: Webellian, JetBrains

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Class Builder Lab: 5 micro-sessions in 5 days Dates: 12 May - 16 May  Time: 15:00 - 15:30 (daily)  Kyiv time (GMT +3 hours) Ready to save hours on lesson planning? Then Class Builder platform is for you - it will help you create digital worksheets in just under 5 minutes. The Class Builder Lab is a 5-day series designed to show you exactly how this tool works and how it can transform your teaching experience. Throughout these sessions, we'll explore various lesson types and demonstrate how to design and structure them effortlessly using Class Builder. With Class Builder, you can quickly develop materials for any language level or class type, and everything you create stays in your account permanently - ready to use again and again in future classes. Build your personal lesson library while saving countless hours of prep time! Sessions: 1 Class-Builder Intro (12th May) We'll walk through the main features, show you how to create your first lesson, and share some tricks that experienced teachers use. 2 Grammar Class in 5 minutes: structure and flow (13th May) Grammar doesn't have to be boring! In this session, we'll show you how to quickly put together grammar lessons that actually work. 3 Types of tasks for functional language (14th May) We'll look at different task types that get students talking, from simple guided practice to free-flowing conversations. You'll see how to string these together with the help of the Class Builder platform. 4 Vocabulary-focused lesson (15th May) We'll share practical ways to introduce and practice new words that go beyond flashcards and lists. You’ll see how Class Builder can be used to help students memorise, drill and use new vocabulary items. 5 Classes Based on Hot Topics (15th May) Want to use current events and trending topics that your students care about? Come to this session to learn all about the “Hot Topics” section, that includes interesting up-to-date topics and interactive activities to go with them. 🔥 Interested? Registration here: https://lnkd.in/eubrmkcg

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GOG, the DRM-free PC game store launched by CD Projekt in 2008, has been acquired by co-founder Michał Kiciński for $25.2 million. The platform will continue its mission to provide DRM-free games and maintain its founding principles under new ownership.

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When you join Matt K.’s session at AI Kata Warsaw v1, you won’t be talking about refactoring — you’ll be cleaning up real, messy code with Cursor. Matt will walk you through practical techniques for AI-assisted refactoring inside a chaotic, legacy-style project. You’ll see how Cursor helps you untangle confusing logic, rewrite problematic sections, and turn “I really don’t want to touch this” code into something clean, readable, and maintainable. And because the workshop uses .NET / C#, you’ll be working in a stack many engineers use in real life — no abstractions, no artificial examples. For many engineers, this is the moment they realise AI isn’t just for generating new code — it can help you fix the old stuff you’ve been avoiding. About Matt: Matt is an AI consultant, CTO, and software engineer who specialises in AI implementation strategies. His strength is turning AI from a buzzword into a concrete, workable plan — and helping teams integrate it smoothly into real products across different industries. With years of engineering experience, he focuses on practical refactoring workflows that actually improve shipping code. If you want to see how Cursor can help you clean up legacy code — not just generate new code — join Matt’s hands-on session at AI Kata Warsaw v1 on December 6

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"Trust but verify" - a principle that's saved me from countless project disasters. In Russian: доверяй, но проверяй Whether it's requirements gathering, data migration assumptions, or that "simple" integration - the most expensive word in consulting is "assume." I learned this lesson the hard way on a Salesforce project in the 2000’s. (Yes we had electricity back then) Cost us 4 months and nearly a client relationship. Your most expensive mistakes often come from the things you never questioned. What assumptions are you making in your current project? #Salesforce #ProjectManagement #LessonsLearned

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Now Available: Kilo Code for JetBrains IDEs Kilo Code is an open-source, model-agnostic AI code assistant with transparent pricing. Today, we're bringing that same transparent philosophy, plus all our powerful agentic coding capabilities, to IntelliJ IDEA, PyCharm, WebStorm, and other popular JetBrains IDEs. Our Promise to JetBrains Developers: ✅ Start for free. Then pay as you go. We charge exactly what model providers charge. ✅ Use any AI model. Choose from 400+ hosted models, use free models, local ones, or bring your own API keys. ✅ Fully open source. No lock-in. No black boxes. We never train on your data, and you can switch API providers anytime. Read more: https://lnkd.in/eRrtfpz4 Install now: https://lnkd.in/e9Dfpwn8

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Escape from Tarkov Graphics Remake and "Tarkov 2.0" Updates Teased by Battlestate Games Nikita Buyanov, head of Battlestate Games, revealed plans for a major graphical overhaul and concept updates for Escape from Tarkov, informally dubbed "Tarkov 2.0." While not a full sequel, the initiative aims to improve the game’s technical foundation, enhance quality-of-life features, and expand in-game and offline events. Key updates highlighted include: - A graphic rework and the upcoming addition Life of a Wildling, which allows players to build a personal Hideout. - Introduction of transparent weapon magazines for better tactical feedback. - Development of a "full-fledged series" exploring Tarkov’s prehistory, in-game events, and future lore. Buyanov noted that the unexpected hype at release motivated him to continue evolving Tarkov’s universe, emphasizing long-term plans to fully develop the game’s potential. #EscapeFromTarkov #Tarkov2 #BattlestateGames #GamingNews #TOGNews2025

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Why Hyvä Doesn’t Make Sense for Magento? Let’s be honest: Hyvä had its moment—mainly during the early days(2022) of the war in Europe, when many developers shifted focus to supporting Ukraine. During that time, Hyvä partnered with Belarus to build their theme and extensions. But that moment has passed. It’s marketed as a “faster” Magento frontend, but what are you really getting? A commercial theme built on open-source AlpineJS with slow Magento Backend — two tools that weren’t designed for large-scale eCommerce. And you’re paying for the privilege of using open-source Magento code repackaged behind a commercial license wall. Meanwhile, the New React Luma Theme project is open source, modern, and built for performance. No bloated Tailwind. No AlpineJS bottlenecks. Just pure JS, optimized loading, and complete freedom. Truly Open Source – No vendor lock-in, no gray licensing. Built on Modern Tech – Vanilla JS, React, VueJS, Swelty. modular structure, optimized bundles. Compatible and Extensible – Works out of the box with most Magento modules. Zero Fees – No commercial license, no costly migrations, no extra costs for what Magento already gives you. Agencies upsell Hyvä Commerce because it is profitable. But in reality, it locks you into yet another layer of abstraction — with zero benefit to backend performance and questions around Magento licensing. If you’re serious about Magento performance and developer freedom, there’s no reason to pay for Hyvä when you have a better, faster, free alternative. React is what Magento should’ve been. Fast. Free. Open.

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