Stepan Samko https://samko.io/ Software Engineer. Web Performance, React, Next.js, architecture. en Mon, 09 Mar 2026 13:29:17 GMT Why AI Development Tools Must Be Execution-Aware https://samko.io//writings/execution-aware-ai-tools https://samko.io//writings/execution-aware-ai-tools Mon, 29 Dec 2025 00:00:00 GMT From code readers to system observers How to Give AI Agents Access to Runtime Traces https://samko.io//writings/runtime-traces-for-ai-agents https://samko.io//writings/runtime-traces-for-ai-agents Mon, 29 Dec 2025 00:00:00 GMT A practical guide to debugging locally with execution-aware AI Rendering & React Performance Deep Dive for a High-Scale DeFi Portfolio UI https://samko.io//case-studies/react-rendering-performance-defi-case-study https://samko.io//case-studies/react-rendering-performance-defi-case-study Wed, 01 Jan 2025 00:00:00 GMT Virtualized heavy lists, eliminated rendering stalls, replaced slow CSS-in-JS, and achieved stable 60 FPS under load. Building a High-Scale Real-Time Portfolio Engine for a Multi-Chain DeFi Platform https://samko.io//case-studies/realtime-defi-portfolio-engine https://samko.io//case-studies/realtime-defi-portfolio-engine Wed, 01 Jan 2025 00:00:00 GMT A real-time streaming architecture that stayed smooth with thousands of positions across chains, protocols, and wallets. Next.js App Speedup by Fixing Server Fetching & Blocking Waterfalls https://samko.io//case-studies/nextjs-fetching-waterfalls-fix https://samko.io//case-studies/nextjs-fetching-waterfalls-fix Wed, 01 Jan 2025 00:00:00 GMT Removed nested layout waterfalls, consolidated RSC data loading, and improved TTFB by 40% and LCP by 35%.