Site Reliability Engineer, Lark - USDS

Responsibilities

Team Intro:
Lark is the next-generation collaborative tool that boosts organizations' efficiency, creativity, and engagement by integrating Messenger, Docs, Calendar, Video calls, Emails, and more into one easy-to-use app.
The USDS Lark team is seeking an experienced Site Reliability Engineer to help us continue improving the Lark system. If you are passionate about ensuring software reliability, love problem-solving, and are prepared for exciting challenges, we would like you on our team.

• Responsible for overall reliability of Lark product
• Perform lifecycle management of production systems including change management, service deployment, operations and emergency response.
• Monitor the system and respond to incidents to maintain system service level agreement (SLA), review and follow up all production incidents.
• Perform capacity management of compute, storage and network bandwidth resources to ensure system stability and save infrastructure costs.
• Provide strong support during big events to ensure the system is capable of consuming a large volume of Internet traffic.
• Build tools, automations, visualizations and monitors to facilitate the operation and optimization of the global infrastructure.

• Bachelor's degree in Computer Science or a related technical background involving software/system engineering, or equivalent working experience.
• 1+ years of SRE or Dev Ops experience in large scale online services
• Programming experience with at least one of the following languages: C, C++, Java, Python, C# or Go.

• Extensive knowledge of networking, operation systems, database systems and container technology.
• Good understanding of every aspect of microservice architecture, and hands on experience in troubleshooting in large scale distributed systems.
• Hands on experience in common opensource systems such as Linux, MySQL, MongoDB, Redis and ELK.
• Experience in building solutions with AWS, Google, Azures and other cloud services is a plus.
• Passionate, self-motivated and good teamwork skills.

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 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…