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TikTok

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

San JosePosted Jan 29, 2026

Apply on company site View full job

Why you should apply for a job to TikTok:

4.5/5 in overall job satisfaction
4.5/5 in supportive management
100% say women are treated fairly and equally to men
100% would recommend this company to other women
100% say the CEO supports gender diversity

Ratings are based on anonymous reviews by Fairygodboss members. See all reviews ›

Responsibilities

About the Team
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.

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.
- Assist in building Evals, harnesses and optimisations on existing AI tooling & systems for Security Review.
- Improve the usage of LLM in the SDLC process and enhance the infrastructure security.

Qualifications

Minimum Qualifications
- 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

By submitting an application for this role, you accept and agree to our global applicant privacy policy, which may be accessed here: https://jobs.bytedance.com/en/legal/privacy.

Responsibilities

Qualifications

Qualifications

Minimum Qualifications
- 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

By submitting an application for this role, you accept and agree to our global applicant privacy policy, which may be accessed here: https://jobs.bytedance.com/en/legal/privacy.

About TikTok

TikTok is the leading destination for short-form mobile video and our mission is to inspire creativity and bring joy.

Size: 10,000+ employees
Industry: Technology: Consumer Internet

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