Senior Security Engineer​/Product Security

Senior Security Engineer - Application/Product Security

Get AI-powered advice on this job and more exclusive features.

• Team Introduction:
  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.
• Ensure that our applications are designed and implemented to the highest security and privacy standards, thus maintaining and enhancing user trust.
• Review and analyze design, architectures, existing systems, services, operating systems, networks and applications from a security perspective via black‑box testing, code reviews, automation, threat modeling and research.
• Discover security issues that appear under new threat scenarios, support incident response, forensics, remediation in a cross‑functional environment driving toward incident resolution.

• Bachelor’s degree in Computer Science, Computer Engineering, Electrical Engineering, or other relevant majors.
• 5 years of security engineering experience such as design review, threat modeling, security mitigation development, security tooling development or privacy engineering.
• Advanced knowledge and understanding in various disciplines: web application security, mobile app security, network security, operating system internals and hardening, applied cryptography, cloud computing. You are expected to be an expert in at least one of these areas.
• Solid 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.

Tik Tok is the leading destination for short‑form mobile video. At Tik Tok, our mission is to inspire creativity and bring joy. Tik Tok’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.

Inspiring creativity is at the core of Tik Tok’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 toward every day. We strive to do great things with great people.

We lead with curiosity, humility, and a desire to make an 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.

Tik Tok 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 Tik Tok, 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.

Tik Tok is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected by applicable laws. If you need assistance or a reasonable accommodation, please reach out to us at

Compensation (annually): $177,688 - $341,734. Compensation may vary…