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Neciu Dan

Personal site of Neciu Dan — Staff Engineer, host of the Señors @ Scale podcast, ReactJS Barcelona organizer, and international speaker. Covers frontend engineering, testing, security, performance, and engineering career topics.

For agents: Personal site of Staff Engineer Neciu Dan: frontend, React, security and career blog, Señors @ Scale podcast, and a frontend security course.

frontend engineeringreactweb securitysenors at scale podcastengineering career

Their llms.txt

The beginning of the file, from our validated copy saved 2026-10-23T23:14:37.177Z. Cached copy · Source on neciudan.dev

# Neciu Dan

> Personal site of Neciu Dan — Staff Engineer, host of the Señors @ Scale podcast, ReactJS Barcelona organizer, and international speaker. Covers frontend engineering, testing, security, performance, and engineering career topics.

## About

- [About Neciu Dan](https://neciudan.dev/about): Background, talks, and what he works on
- [Newsletter](https://neciudan.dev/#subscribe): Subscribe for new posts and podcast episodes

## Blog

- [Blog index](https://neciudan.dev/blog): JavaScript, React, testing, security, and engineering career articles
- [RSS feed](https://neciudan.dev/rss.xml): Full-content RSS

## Podcast — Señors @ Scale

- [Podcast hub](https://neciudan.dev/senors-at-scale): Conversations with senior engineers about scale, performance, and the realities of large frontend systems
- [Episode takeaways](https://neciudan.dev/takeaways): Per-episode key takeaways in markdown
- Listen on [Spotify](https://open.spotify.com/show/7FVT93UTOhafvQeZGKmV60), [Apple Podcasts](https://podcasts.apple.com/us/podcast/se%C3%B1ors-at-scale/id1827500070), and [YouTube](https://www.youtube.com/@NeciuDan/)

## Course — Master Security in Frontend Applications

Free, self-paced course on frontend security across React, Vue, Angular, and Vanilla JS. All 7 modules are live. Lesson content is free but requires sign-in to read. No credit card required.

- [Master Security overview](https://neciudan.dev/master-security): Course landing page, full curriculum, and sign-up

### Module 1 — Exploits & Supply Chain
- [Understanding package.json and Dependency Versioning](https://neciudan.dev/course/master-security/1-exploits/lesson-1)
- [Anatomy of npm Exploits — Real-World Attacks](https://neciudan.dev/course/master-security/1-exploits/lesson-2)
- [Defending Your Project — npm Security Best Practices](https://neciudan.dev/course/master-security/1-exploits/lesson-3)
- [Security Tooling — Scanners, Auditors, and Automated Defense](https://neciudan.dev/course/master-security/1-exploits/lesson-4)
- [Build Your Own npm Vulnerability Scanner](https://neciudan.dev/course/master-security/1-exploits/lesson-5)
- [Containerized Development and Testing with Docker](https://neciudan.dev/course/master-security/1-exploits/lesson-6)
- [Incident Response and Putting It All Together](https://neciudan.dev/course/master-security/1-exploits/lesson-7)

### Module 2 — Cross-Site Scripting (XSS)
- [What is Cross-Site Scripting?](https://neciudan.dev/course/master-security/2-xss/lesson-1)
- [Stored, Reflected, and DOM-Based XSS](https://neciudan.dev/course/master-security/2-xss/lesson-2)
- [XSS in React, Vue, Angular, and Vanilla JS](https://neciudan.dev/course/master-security/2-xss/lesson-3)
- [XSS Meets OAuth: From Script Injection to Account Takeover](https://neciudan.dev/course/master-security/2-xss/lesson-4)
- [When AI Writes Your XSS: Prompt Injection, Slopsquatting, and LLM-Rendered Payloads](https://neciudan.dev/course/master-security/2-xss/lesson-5)
- [CSP, Trusted Types,
…

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