Senior Backend Software Engineer, Authorization

BYTEDANCE PTE. LTD.; Singapore; On-site; SGD 85,000 - 110,000; Full time

Job summary

A leading global technology company is seeking a Senior Backend Software Engineer to develop cutting-edge authorization services essential for operational security. This role involves system design ownership, performance optimization, and championing security best practices. Candidates should have a degree in Computer Science and extensive experience in backend development, including proficiency in languages like Go or Java. The company values collaboration and aims to inspire creativity and enrich life, fostering a diverse and inclusive workplace.

Benefits

Inclusive workspace

Opportunities for professional development

Diverse team environment

Qualifications

• 4+ years of experience building and scaling production backend systems.
• Experience in writing automated tests and performing code reviews.
• Proven debugging skills for complex production issues.

Responsibilities

• Lead design and implementation of backend services.
• Drive performance optimization efforts to ensure high throughput.
• Champion security best practices and maintain compliance.
• Set high standards for code quality through reviews and testing.
• Lead troubleshooting and incident resolution for production systems.
• Collaborate with teams to translate requirements into solutions.

Skills

Backend programming languages (Go, Java, Python, C++)

Performance tuning and scalability

Security best practices

Collaboration with cross-functional teams

Education

Bachelor’s degree in Computer Science or equivalent

Tools

SQL databases

NoSQL databases

Job description

Responsibilities

About the Team 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. Our mission is to develop and sustain a state‑of‑the‑art model that enforces the principle of least privilege throughout all operations. Our user-friendly interfaces enable employees and microservices to interact seamlessly with our authorization systems, making complex security protocols both accessible and manageable. Job Responsibilities: Our authorization services are highly data‑intensive and operate at scale, requiring solutions to classic and complex backend challenges to achieve consistently high throughput and low latency. As a Senior Backend Software Engineer, you will play a key role in shaping, building, and evolving these systems.

• System Design and Ownership:

  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.

• Performance and Scalability:

  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.

• Security Leadership:

  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.

• Code Quality and Engineering Excellence:

  Set a high bar for code quality through thoughtful design, thorough reviews, and comprehensive automated testing, improving the maintainability, reliability, and robustness of the codebase.

• Troubleshooting and Reliability:

  Lead complex debugging and incident resolution efforts, develop tools and processes to improve observability, and contribute to the overall reliability and availability of our systems.

• Collaboration and Technical Leadership:

  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.

Qualifications

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 NoSQL 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.
• 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.

Job Information

Founded in 2012, ByteDance's mission is to inspire creativity and enrich life. With a suite of more than a dozen products, including TikTok, Lemon8, CapCut and Pico as well as platforms specific to the China market, including Toutiao, Douyin, and Xigua, ByteDance has made it easier and more fun for people to connect with, consume, and create content.

Inspiring creativity is at the core of ByteDance'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 ByteDancers, 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.

Diversity & Inclusion

ByteDance 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 ByteDance, 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.

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