Dáger Zúñiga

Security Engineer - Bug Hunter - Coder - Blogger

About Me

I'm a security engineer with experience across the full security spectrum, from application security to infrastructure protection. I'm passionate about building secure products.

When I'm not investigating vulnerabilities or crafting security tools, you'll find me sharing insights on my blog.

I enjoy writing documentation as much as I enjoy breaking systems (a lot!).

Experience

  • Security Engineer

    The Lifetime Value Company | 2023 - Present

    Building on my front-end experience within the company, I transitioned to a security-focused role. This unique path has shaped my approach to security - I see it not just as finding vulnerabilities, but as a crucial part of the development lifecycle. Between pentests, security reports, and building internal tools, I've learned that the best security solutions come from understanding both the attacker's mindset and the developer's constraints.

    Areas & tools I focused on:

    Vulnerability Assessment • Web App Security • Mobile Security • API Security • Penetration Testing • Cloud Security • Malware Analysis • Phishing Prevention • Go • Python • GitHub Advanced Security

  • Front-End Engineer

    The Lifetime Value Company | 2020 - 2023

    My time as a front-end engineer was transformative. Beyond the technical work of optimizing legacy code and crafting new features, I discovered my passion for making systems better and helping others grow. Working with diverse technologies from Chrome extensions to large-scale web applications taught me the importance of balancing performance with security - a perspective that would later shape my career path.

    Areas & tools I focused on:

    JavaScript • React • TypeScript • Browser Extensions • Webpack • Performance Optimization • Web Security • CSS/SCSS • GitHub Advanced Security • CodeQL • Dependabot

  • Full-Stack Engineer

    FDCR | 2019 - 2020

    My journey began as a full-stack developer, where I got my hands dirty with everything from database optimization to front-end frameworks. Working with legacy systems taught me the art of improving code without breaking things (unintentionally, at least!). This foundation in full-stack development gave me a holistic view of how applications work - and more importantly, how they can fail.

    Areas & tools I focused on:

    Laravel • PHP • MySQL • Database Optimization • MVC Architecture • JavaScript • Bulma • CSS/Sass

Skills

  • JavaScript
  • Python
  • Docker
  • PHP
  • SQL
  • Web Application Security
  • Vulnerability Assessment
  • Go
  • Secure Coding Practices
  • Security Automation & Analysis
  • API Security
  • Penetration Testing
  • Cloud Security
  • Mobile Security
  • Malware Analysis
  • Phishing Analysis and Prevention
I've been working with the JavaScript ecosystem extensively, from building Chrome extensions with React and TypeScript to developing tools with Node.js. My experience includes modernizing legacy code to ES6 standards and optimizing applications with Webpack, achieving significant performance improvements. Currently, I use this versatility to create both interactive interfaces and security tools.

Personal Projects

Links of Interest

Contact

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