Application Security-Variant Analysis Intern London

London, England, United Kingdom

5/14/2025

Responsibilities

You’ll be joining a global offensive security team comprised of experienced professionals specializing in both application and native security. Our team is distributed across multiple continents, bringing together diverse perspectives and expertise to tackle complex security challenges. We collaborate closely to identify, analyze, and mitigate vulnerabilities in a wide range of environments, from modern applications to low-level native code, driving innovation in security research and automation.

Responsibilities

• Support technical Root Cause Analysis for security issues.
• Conduct variant analysis to identify similar vulnerabilities across the codebase. Work with senior engineers to develop patterns and detection methods for recurring vulnerability types or techniques.
• Contribute to the improvement of our security automation pipelines and tooling.
• Extend internal security projects with continuous research and insights.
• Work closely with security engineers, developers, and QA to communicate findings, suggest remediations, and validate fixes.
• Clearly document analysis, findings, and enhancements for internal knowledge sharing and future reference.
  
  

Qualifications

Minimum Qualifications

• Currently pursuing a Bachelor's degree or above.
• Available to start an internship from June to August, expected duration is 3 months.
• Fundamental knowledge of Application Security for client and server side (e.g., OWASP Top 10) and secure coding practices.
• Programming and code review capabilities in at least one of the following languages: Python, JavaScript, Golang
• Interest in security tooling, automation, and DevSecOps practices.
• Strong analytical and problem-solving skills.
• Excellent written and verbal communication skills.
  
  

Preferred Qualifications

• Familiarity with Burp Suite or similar web security testing tools.
• Experience participating in Bug Bounty Programs or Capture The Flag competitions.
• Knowledge of CI/CD pipelines and automation frameworks.
• Fundamental knowledge of Application Security for mobile applications (Android/iOS).
  
  

Job Information

About TikTok

TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikTok's global headquarters are in Los Angeles and Singapore, and we also have offices in New York City, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo.

Why Join Us

Inspiring creativity is at the core of TikTok's mission. Our innovative product is built to help people authentically express themselves, discover and connect – and our global, diverse teams make that possible. Together, we create value for our communities, inspire creativity and bring joy - a mission we work towards every day.

We strive to do great things with great people. We lead with curiosity, humility, and a desire to make impact in a rapidly growing tech company. Every challenge is an opportunity to learn and innovate as one team. We're resilient and embrace challenges as they come. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users. When we create and grow together, the possibilities are limitless. Join us.

Diversity & Inclusion

TikTok is committed to creating an inclusive space where employees are valued for their skills, experiences, and unique perspectives. Our platform connects people from across the globe and so does our workplace. At TikTok, our mission is to inspire creativity and bring joy. To achieve that goal, we are committed to celebrating our diverse voices and to creating an environment that reflects the many communities we reach. We are passionate about this and hope you are too.