Fullstack Software Engineer, Authorization

Fullstack Software Engineer, Authorization

Welcome to the Authorization Services Team! We are the backbone of the company's security infrastructure, responsible for providing cutting‑edge authorization services that are integral to nearly every employee and microservice within our organization.

The Authorization (AuthZ) team builds and operates Kani, Byte Dance’s largest authorization system, serving all product lines. Our mission is to provide a unified permission management platform that empowers engineering teams with robust, easy‑to‑use, and secure access control capabilities.

We focus on delivering a comprehensive solution that includes a flexible approval flow engine and a powerful developer platform. Kani supports all common Access Control models:
Role‑Based Access Control (RBAC), Policy‑Based Access Control (PBAC), and advanced Attribute‑Based Access Control (ABAC) models. By continuously improving user experience (UX) and strengthening our compliance and governance features, we ensure that security is seamless and efficient on a global scale. Join us to tackle challenges in a large‑scale, unified authorization environment.

• Developing and maintaining features for our Web Console, BFF (Backend for Frontend), and backend services.
• Building and optimizing approval flow features to meet diverse business needs.
• Enhancing the user experience of our Lark bot notifications for approvals and alerts.
• Supporting internal teams with permission model integration and data migration.
• Implementing features to detect and warn against compliance risks.
• Improving the performance, reliability, and scalability of our systems.
• Writing high‑quality, well‑tested code and participating in code reviews.
• Collaborating with product managers, designers, and other engineers to deliver impactful solutions.
• Contributing to technical documentation to support our developer community.

Minimum Qualifications

• Bachelor’s degree in Computer Science or a related field.
• Solid understanding of at least one backend programming language (e.g., Go, Java, Python).
• Experience with at least one modern frontend framework (e.g., React, Vue) and Type Script.
• Basic knowledge of web architecture, microservices, and database technologies (SQL or No
  
  SQL).
• A strong sense of code quality, with an appreciation for writing clean, testable code.

Preferred Qualifications

• A foundational understanding of authorization concepts, such as RBAC or PBAC.
• Experience with BFF (Backend for Frontend) patterns.
• Contributions to open‑source projects or a portfolio of personal projects.

Founded in 2012, Byte Dance’s mission is to inspire creativity and enrich life. With a suite of more than a dozen products—including Tik Tok, Lemon8, Cap Cut and Pico as well as China‑specific platforms like Toutiao, Douyin, and Xigua—Byte Dance has made it easier and more fun for people to connect, consume, and create content.

Inspiring creativity is at the core of Byte Dance’s mission. Our innovative products are 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 enrich life—a mission we work towards every day. As Byte Dancers, 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. 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.

Byte Dance 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 Byte Dance, our mission is to inspire creativity and enrich life. 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.