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Unified calculation engine for Next.js and Flutter

https://sudonull.com/unified-calculation-engine-for-next-js-and-flutter

How to synchronize formulas between web and mobile applications, avoiding discrepancies in results. Practical solution using JSON and parity tests.

Web Application Vulnerabilities: XSS SQLi enumeration

https://sudonull.com/web-application-vulnerabilities-xss-sqli-enumeration

Breakdown of top-3 vulnerabilities in web: user enumeration, XSS, SQL injections. Fix methods for developers: prepared statements, encoding. In-depth pentest guide.

How to Design a Scalable Web Application Architecture

https://sudonull.com/how-to-design-a-scalable-web-application-architecture

Learn how to design a scalable web application architecture with practical strategies for statelessness, database sharding, caching, and observability. Expert guide with actionable steps.

From bot to web-system: Excel automation

https://sudonull.com/from-bot-to-web-system-excel-automation

Learn how to turn a Telegram bot into a scalable web application for Excel processing. Saving 150 hours/month, architecture, AI in development. Instructions for developers.

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