https://bobkov.dev Frontend Tech Lead writing about React, TypeScript, performance, AI integration, and building scalable web applications. en Alexander Bobkov Mon, 23 Mar 2026 09:30:00 +0200 https://bobkov.dev/articles/agentic-ui-frontend-react-tool-calls-streaming-2026/ Single-turn LLM calls are a solved UI problem. Agent workflows are not. Tool call progress streaming, human-in-the-loop confirmations, mid-agent cancellation, and how not to mislead users about what the AI is doing. Mon, 23 Mar 2026 09:30:00 +0200 https://bobkov.dev/articles/agentic-ui-frontend-react-tool-calls-streaming-2026/ https://bobkov.dev/articles/maintainable-design-systems-2026-semantic-tokens-ai-theming/ Why Figma to CSS variables is no longer enough. Semantic tokens, code-level variants, and LLM-driven generative theming in a real production design system. Wed, 11 Mar 2026 10:00:00 +0200 https://bobkov.dev/articles/maintainable-design-systems-2026-semantic-tokens-ai-theming/ https://bobkov.dev/articles/web-vitals-lcp-1.5s-nextjs-ssr-2026/ Real-world cases: font loading, hero images, third-party scripts killing INP, partial prerendering, and edge caching tricks to keep LCP under 1.5s at scale. Tue, 24 Feb 2026 11:00:00 +0200 https://bobkov.dev/articles/web-vitals-lcp-1.5s-nextjs-ssr-2026/ https://bobkov.dev/articles/micro-frontends-2026-module-federation-web-components/ Comparing Module Federation, single-spa, MF v2 — when to add Web Components, and how to migrate a legacy frontend while shipping new features in parallel. Fri, 06 Feb 2026 14:00:00 +0200 https://bobkov.dev/articles/micro-frontends-2026-module-federation-web-components/ https://bobkov.dev/articles/gdpr-ai-frontend-llm-no-pii-prompts-2026/ In 2026, adding smart UI features demands careful PII handling. How to safely integrate LLMs into web apps without risking user privacy or GDPR compliance violations. Sun, 11 Jan 2026 13:20:00 +0200 https://bobkov.dev/articles/gdpr-ai-frontend-llm-no-pii-prompts-2026/ https://bobkov.dev/articles/frontend-testing-strategy-large-teams-react-2026/ The testing pyramid applied to React and RSC at scale: unit vs integration vs E2E trade-offs, visual regression, testing AI streaming features, and team adoption strategies. Tue, 09 Dec 2025 14:00:00 +0200 https://bobkov.dev/articles/frontend-testing-strategy-large-teams-react-2026/ https://bobkov.dev/articles/system-thinking-website-builder-multisite/ The nuances of multi-tenant system design that rarely get discussed openly — yet without them, Website Builder and multisite architectures inevitably fall apart. Sun, 02 Nov 2025 12:30:00 +0200 https://bobkov.dev/articles/system-thinking-website-builder-multisite/ https://bobkov.dev/articles/frontend-architecture-decisions-rfc-adr-tech-lead/ A lightweight RFC and ADR process that frontend teams actually use — proposals, async reviews with deadlines, ADR format for capturing why decisions were made, and handling disagreement constructively. Tue, 14 Oct 2025 11:15:00 +0200 https://bobkov.dev/articles/frontend-architecture-decisions-rfc-adr-tech-lead/ https://bobkov.dev/articles/react-server-components-streaming-production-2026/ How we migrated 400+ pages to RSC, the trade-offs that surfaced, how to measure and fix waterfalls, and why Suspense boundaries are an engineering choice, not magic. Sat, 13 Sep 2025 08:45:00 +0200 https://bobkov.dev/articles/react-server-components-streaming-production-2026/ https://bobkov.dev/articles/frontend-dx-monorepo-turborepo-nx-shared-configs-2026/ Turborepo vs Nx trade-offs, remote caching that cut CI from 14 to 3 minutes, shared ESLint and TypeScript config packages, and enforcing module boundaries in a frontend monorepo. Tue, 29 Jul 2025 09:00:00 +0200 https://bobkov.dev/articles/frontend-dx-monorepo-turborepo-nx-shared-configs-2026/ https://bobkov.dev/articles/frontend-security-csp-xss-supply-chain-2026/ Practical frontend security defaults every tech lead should configure: CSP with nonces in Next.js, XSS gaps in React, npm supply chain risk, and dependency auditing in CI. Tue, 24 Jun 2025 10:30:00 +0200 https://bobkov.dev/articles/frontend-security-csp-xss-supply-chain-2026/ https://bobkov.dev/articles/accessibility-engineering-react-98-score-2026/ How we raised an a11y score from 60% to 98% in a 5M MAU product — without team friction. Custom React hooks, ARIA live regions, semantic HTML, and axe-core in CI. Sun, 18 May 2025 15:45:00 +0200 https://bobkov.dev/articles/accessibility-engineering-react-98-score-2026/ https://bobkov.dev/articles/advanced-typescript-large-codebase-patterns-2026/ Escaping "any hell" in large codebases: branded types, const assertions, module augmentation, and tRPC-style end-to-end type safety. Why zod + ts-pattern is the real solution. Mon, 14 Apr 2025 09:30:00 +0200 https://bobkov.dev/articles/advanced-typescript-large-codebase-patterns-2026/ https://bobkov.dev/articles/llm-integration-frontend-react-streaming-optimistic-ui-2026/ Embedding AI chat and content generation in React: streaming responses, optimistic UI, abort controllers, rate limiting, and keeping Core Web Vitals intact under LLM load. Sun, 08 Mar 2025 10:15:00 +0200 https://bobkov.dev/articles/llm-integration-frontend-react-streaming-optimistic-ui-2026/