Security Software Engineer Project Intern (Product Security) - 2026 Start (BS/MS)

Security Software Engineer Project Intern (Product Security) - 2026 Start (BS/MS) at TikTok in San Jose, CA.

Responsibilities

• Participate in security assessments such as pentests on Web or mobile applications.
• Take part in tooling development projects with a security focus, such as code review and API testing. Tools developed will benefit LLM integration.
• Assess the security of MCP servers and LLM features explosed to the public.

Requirements

• Undergraduate, or Postgraduate who is currently pursuing a degree/master in Computer Science, Computer Engineering, Information Systems or other STEM disciplines
• Security engineering experience such as threat modeling, security mitigation development, security tooling development or privacy engineering.
• Understanding in various disciplines: web application security, mobile app security, network security, operating system internals and hardening, applied cryptography, cloud computing. You're expected to be an expert in at least one of these areas.
• Experience in writing and reviewing code in at least one of the following programming languages: JavaScript (Node JS), Go, Python, Java, C++, Rust.
• Strong problem-solving skills and excellent debugging / troubleshooting skills.

Preferred Qualifications

• Experience with NLP/LLM
• Knowledge of distributed systems, edge computing, or high-performance network programming

About the Company

The team is missioned to build infrastructures, platforms and technologies, as well as to support cross-functional teams to protect our users, products and infrastructures. In this team you'll have a unique opportunity to have first-hand exposure to the strategy of the company in key security initiatives, especially in building scalable and secure-by-design systems and solutions. Our challenges are not your regular day-to-day technical problems; you'll be part of a team that's developing new solutions to new challenges of a kind not previously addressed by big tech. It's working fast, at scale, and we're making a difference.

As a project intern, you will have the opportunity to engage in impactful short-term projects that provide you with a glimpse of professional real-world experience. You will gain practical skills through on-the-job learning in a fast-paced work environment and develop a deeper understanding of your career interests.

Applications will be reviewed on a rolling basis - we encourage you to apply early.

Successful candidates must be able to commit to at least 3 months long internship period.