Senior Backend Software Engineer, Authorization

Senior Backend Software Engineer, Authorization

Get AI-powered advice on this job and more exclusive features.

• Lead the design, implementation, and long-term maintenance of critical backend services or our authorization systems, making sound architectural decisions that balance scalability, reliability, and security.
• Drive performance optimization efforts across the stack, proactively identifying bottlenecks and implementing solutions to support high throughput, low latency, and predictable system behavior under load.
• Champion security best practices by design, including least-privilege principles, defense-in-depth strategies, and secure coding standards, ensuring our authorization services meet high security and compliance requirements.
• Set a high bar for code quality through thoughtful design, thorough reviews, and comprehensive automated testing, improving maintainability, reliability, and robustness of the codebase.
• Lead complex debugging and incident resolution efforts, develop tools and processes to improve observability, and contribute to overall reliability and availability of our systems.
• Collaborate closely with engineers, security specialists, product partners, and stakeholders to translate requirements into technical solutions, mentor junior engineers, and influence the team’s technical direction and best practices.

Minimum Qualifications

• • Bachelor’s degree in Computer Science or a related field, or equivalent practical experience, with 4+ years of experience building, operating, and scaling production backend systems.
• • Proficiency in one or more backend programming languages such as Go, Java, Python, C++ or similar.
• • Proven experience writing comprehensive automated tests, performing effective code reviews, and debugging complex production issues to ensure high standards of code quality and reliability.

Preferred Qualifications

• • Solid experience designing backend systems, including RESTful APIs, microservices or service-oriented architectures, and data models using SQL and No
  
  SQL databases.
• • Demonstrated experience building and optimizing high-throughput, high-availability systems, with a strong understanding of performance tuning and scalability trade-offs.
• • Practical knowledge of backend security principles and best practices, including authentication, authorization, least-privilege access, and secure service-to-service communication.
• • Experience leading design discussions, mentoring engineers, and raising the technical bar through code reviews and engineering best practices.
• • Strong ability to collaborate cross-functionally with product, infrastructure, and security teams to deliver end-to-end backend solutions.

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 platforms specific to the China market, including Toutiao, Douyin, and Xigua, Byte Dance has made it easier and more fun for people to connect with, 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. By constantly iterating and fostering an "Always Day 1" mindset, we achieve meaningful breakthroughs for ourselves, our company, and our users.

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.

Byte Dance is committed to providing reasonable accommodations in our recruitment processes for candidates with disabilities, pregnancy, sincerely held religious beliefs or other reasons protected…