Evergreen technical articles, engineering case studies and notes on React, Node.js, Shopify, Cloudflare, AI and performance.https://rohitgautam.site/en-ushttps://rohitgautam.site/blog/react-performance-checklist/https://rohitgautam.site/blog/react-performance-checklist/A practical, measurement-first checklist for making React apps fast: render cost, list virtualisation, bundle budgets, Suspense boundaries and the profiling workflow behind each fix.Sat, 14 Mar 2026 00:00:00 GMTReactReactPerformanceProfilingBundle SizeSuspensehttps://rohitgautam.site/blog/node-api-architecture-that-scales/https://rohitgautam.site/blog/node-api-architecture-that-scales/How to structure a Node.js and Express API so it survives growth: layered boundaries, validation at the edge, idempotent writes, background work and the observability you need before things break.Sun, 08 Feb 2026 00:00:00 GMTNode.jsNode.jsExpressArchitectureMongoDBQueueshttps://rohitgautam.site/blog/shopify-app-on-cloudflare-workers/https://rohitgautam.site/blog/shopify-app-on-cloudflare-workers/An edge-first architecture for Shopify apps: OAuth on Workers, HMAC-verified webhooks, session storage without a Postgres bill, and the constraints you need to design around.Mon, 19 Jan 2026 00:00:00 GMTShopifyShopifyCloudflareWorkersOAuthWebhookshttps://rohitgautam.site/blog/typescript-patterns-for-large-frontends/https://rohitgautam.site/blog/typescript-patterns-for-large-frontends/Discriminated unions, branded types, schema-derived types and the small set of TypeScript patterns that keep a growing React codebase honest without turning it into type golf.Thu, 02 Apr 2026 00:00:00 GMTTypeScriptTypeScriptReactZodTypesDXhttps://rohitgautam.site/blog/image-optimization-at-the-edge/https://rohitgautam.site/blog/image-optimization-at-the-edge/How to cut page weight with modern formats, correct sizing, edge caching and lazy loading — measured against LCP rather than a compression ratio.Wed, 06 May 2026 00:00:00 GMTPerformancePerformanceImagesCloudflareLCPCachinghttps://rohitgautam.site/blog/designing-ai-features-that-dont-break/https://rohitgautam.site/blog/designing-ai-features-that-dont-break/Prompt versioning, structured outputs, cost control, graceful degradation and evaluation — the engineering around a model call that decides whether the feature survives.Thu, 11 Jun 2026 00:00:00 GMTAIAILLMArchitectureReliabilityCosthttps://rohitgautam.site/blog/javascript-memory-leaks-in-spas/https://rohitgautam.site/blog/javascript-memory-leaks-in-spas/A repeatable workflow for diagnosing memory leaks in single-page applications with heap snapshots, plus the five leak sources responsible for most real cases.Sat, 25 Apr 2026 00:00:00 GMTJavaScriptJavaScriptDebuggingMemoryReactDevToolshttps://rohitgautam.site/blog/scaling-a-multi-vendor-marketplace-catalog/https://rohitgautam.site/blog/scaling-a-multi-vendor-marketplace-catalog/Engineering notes from a multi-vendor marketplace: modelling vendor-scoped inventory, keeping search fast as the catalog grows, and settling payouts without double-counting.Fri, 27 Feb 2026 00:00:00 GMTSystem DesignSystem DesignMongoDBMarketplaceSearchPaymentshttps://rohitgautam.site/blog/cutting-shopify-theme-lcp-in-half/https://rohitgautam.site/blog/cutting-shopify-theme-lcp-in-half/A measured teardown of a slow Shopify storefront: which apps cost the most, how the hero image was fixed, and what actually moved Largest Contentful Paint.Mon, 30 Mar 2026 00:00:00 GMTShopifyShopifyPerformanceLCPLiquidThird-party scriptshttps://rohitgautam.site/blog/what-i-look-for-in-engineering-work/https://rohitgautam.site/blog/what-i-look-for-in-engineering-work/A short personal note on how I choose projects, what a good brief looks like, and the questions I ask before writing a line of code.Thu, 21 May 2026 00:00:00 GMTCareerCareerConsultingProcess