Endpoint Security Software Engineer, Android - USDS

Responsibilities

About the team
The Security Engineering team is missioned to run and operate security infrastructures, platforms and technologies, as well as to support cross-functional teams to protect our users, products and infrastructures. This team is responsible for enhancing security tools and identifying vulnerabilities, with a specific focus on content assurance and the application of large language models (LLMs). You'll collaborate cross-functionally with partners inside and outside TikTok to fortify our products and users' security, helping to establish TikTok as the most trusted platform.

Responsibilities
We are seeking a Software Engineer to lead the integration and support of our Android AppGuard Solution. You will leverage modern mobile frameworks to build and scale high-traffic, consumer-facing applications with a primary focus on security and traffic integrity. You will play a critical role in developing the AppGuard engine, ensuring seamless communication with server-side monitoring and rule-update systems.
- Lead Technical Development: Drive the design of the Android security layer, ensuring a seamless transition to modern, open-source-aligned architectures.
- Security Engine Implementation: Build high-performance engines on the application side to execute DSL logic for security validation.
- Traffic Management: Implement system-level monitoring to analyze and, if necessary, cut-off app ingress/egress traffic.
- Platform Tooling: Develop internal platforms for profiling, debugging, and operational validation of the sandbox environment.
- Ensure Code Quality: Maintain high standards for system reliability and security, ensuring all logic meets performance requirements.

Qualifications

Minimum Qualifications
- BS/MS degree in Computer Science, Engineering, or a related field.
- 3+ years of experience in mobile app development for Android, with a track record of scaling high-traffic apps.
- Expertise in Kotlin and Java, and a deep understanding of the Android SDK and associated development tools.
- Strong Debugging Skills: Ability to troubleshoot complex issues efficiently across diverse hardware profiles.

Preferred Qualifications
- Experience in designing or developing automation agents or intelligent security systems.
- Proficiency in containerization and cloud environments for supporting backend sandbox services.
- Experience with CI/CD pipelines and DevOps practices for mobile deployment.

Job Information

[For Pay Transparency] Compensation Description (annually)

The base salary range for this position in the selected city is $187040 - $359720 annually.

Compensation may vary outside of this range depending on a number of factors, including a candidate's qualifications, skills, competencies and experience, and location. Base pay is one part of the Total Package that is provided to compensate and recognize employees for their work, and this role may be eligible for additional discretionary bonuses/incentives, and restricted stock units.

Benefits may vary depending on the nature of employment and the country work location. Employees have day one access to medical, dental, and vision insurance, a 401(k) savings plan with company match, paid parental leave, short-term and long-term disability coverage, life insurance, wellbeing benefits, among others. Employees also receive 10 paid holidays per year, 10 paid sick days per year and 17 days of Paid Personal Time (prorated upon hire with increasing accruals by tenure).

The Company reserves the right to modify or change these benefits programs at any time, with or without notice.

For Los Angeles County (unincorporated) Candidates:

Qualified applicants with arrest or conviction records will be considered for employment in accordance with all federal, state, and local laws including the Los Angeles County Fair Chance Ordinance for Employers and the California Fair Chance Act. Our company believes that criminal history may have a direct, adverse and negative relationship on the following job duties, potentially resulting in the withdrawal of the conditional offer of employment: