Senior Software Engineer, Data Foundation – USDS

About the Team

The Tik Tok U.S. Data Security (USDS) team is responsible for the security, integrity, and compliance of Tik Tok’s data within the United States. The Data Platform Team builds a scalable, reliable, cost-efficient infrastructure that ensures data integrity and empowers every business unit to win through self-service tools and scientific insights.

We are seeking a Senior Engineer to lead efficiency, stability, and AI-driven innovation initiatives. You will be responsible for optimizing the performance and efficiency of our core data engines—Apache Spark, Kafka, Click House, and Doris—while pioneering AI-powered solutions that enhance platform intelligence, automate operations, and drive cost optimization at a petabyte scale.

• Optimize Apache Spark performance and resource utilization at petabyte scale
• Enhance Click House and Doris OLAP systems with storage-compute separation and query optimizations
• Implement AI-driven resource allocation and cost optimization strategies

• Develop automated job diagnosis and failure analysis systems using AI/ML techniques
• Build intelligent monitoring and self-healing capabilities for data pipelines
• Create AI-powered tools for query optimization and data discovery

• Design robust disaster recovery and data integrity mechanisms
• Integrate AI/ML capabilities to enhance platform efficiency and developer productivity

• Drive technical roadmap and mentor junior engineers
• Explore new technologies at the intersection of distributed systems and AI

• Education:
  
  BS/MS in Computer Science, Engineering, or a related technical field
• Distributed Systems: 3+ years of experience building and maintaining large-scale distributed systems
• Stack Expertise:
  In-depth knowledge of Apache Spark, Click House or Doris

• Experience with Kafka & Flink at scale
• Kubernetes (K8s) experience
• AI/ML systems experience

Tik Tok USDS Joint Venture LLC is dedicated to the safety and security of millions of Americans who create, discover, and connect with what they love on the apps we operate. The Joint Venture has been established in compliance with the Executive Order signed by President Trump on September 25, 2025. Our foundation is a comprehensive data privacy and cybersecurity program we operate under defined safeguards to protect national security and secure U.S. user data, apps and the algorithm.

We safeguard the U.S. content ecosystem, holding decision-making authority for trust and safety policies and moderation. USDS Joint Venture helps ensure Americans can continue to express their creativity, discover new hobbies and interests, and build thriving communities and businesses on a global scale.

On-site presence across teams allows the company to operate with greater speed, alignment, and agility — especially in areas like real-time decision-making, team development, and integrated execution. As such, the company is shifting from a hybrid work model to a fully in-person schedule up to 5 days a week.

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 towards every day.

We strive to do great things with great people. We lead with curiosity, humility, and a desire to make 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…