About the Company TikTok is the leading destination for short-form mobile video. At TikTok, our mission is to inspire creativity and bring joy. TikToks global headquarters are in Los Angeles and Singapore, and its offices include New York, London, Dublin, Paris, Berlin, Dubai, Jakarta, Seoul, and Tokyo. Why Join Us Creation is the core of TikToks purpose. Our platform is built to help imaginations thrive. This is doubly true of the teams that make TikTok possible. Together, we inspire creativity and bring joy - a mission we all believe in and aim towards achieving every day. To us, every challenge, no matter how difficult, is an opportunity; to learn, to innovate, and to grow as one team. Status quo? Never. Courage? Always. At TikTok, we create together and grow together. Thats how we drive impact - for ourselves, our company, and the communities we serve. Join us. 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 youll 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; youll be part of a team thats developing new solutions to new challenges of a kind not previously addressed by big tech. Its working fast, at scale, and were making a difference. - Ensure that our applications are designed and implemented to the highest security and privacy standards thus maintaining and enhancing user trust. - Design and perform tests and check cases to 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. This is to meet confidentiality, integrity, authentication, availability, authorisation, and nonrepudiation standards. - Translate requirements into test plan, write and execute test scripts or codes in line with standards and procedures to determine vulnerability to attacks. - Certify infrastructure components, systems and applications that meet security standards. - Discover security issues that appear under new threat scenarios, support incident response, forensics, remediation in a cross-functional environment driving towards incident resolution. - Provide guidance to other teams and security engineers, drive security initiatives, and lead cross-functional projects focused on improving the security posture of companys products and systems.Minimum Qualifications - Bachelors degree in Computer Science, Computer Engineering, Electrical Engineering, or other relevant majors. - 4+ 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. Youre 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. Preferred Qualifications - CTF players, live competitions and hacking events experience. - CVEs such as remote code execution are preferred. - BugBounty experience with reputable statistics in HackerOne, BugCrowd etc. 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.