Responsibilities
About the Team
Our team is dedicated to elevating the level of cybersecurity to fully support ByteDance as well as our clients digital journey. We aim high at building the next-generation cybersecurity.
Rooted from years of practical experience in the enterprise security domain within ByteDance, the team now runs as a business. We provide a comprehensive set of security capabilities to help our clients develop a Secure Access Service Edge(SASE) architecture with simplicity and convenience. The team is agile, efficient and open. Your idea matters.
We are expanding to APAC, Middle East, and Europe markets. Join us, and be part of the excitement of making a real difference.

Job Responsibilities
1. Design and develop the application proxy and security gateway architecture for Sealsuite, building a highly available, high-performance, and scalable system.
2. Drive feature development and technical optimization for Zero Trust (ZTNA), Secure Web Gateway (SWG), Cloud Access Security Broker (CASB), and AI security solutions, supporting international business scenarios.

Qualifications
Minimum Qualifications
1. Bachelor's degree or above in Computer Science or a related field, with at least 1 year of development experience.
2. Proficient in at least one programming language such as C++, Go, Java, or Rust; familiar with databases, caching systems, message queues, and long-lived connections.
3. Solid foundation in Linux systems and networking, with a strong commitment to engineering excellence and code quality.
4. Experience in Layer 4/Layer 7 proxy, security gateway, or VPN development; capable of analyzing and solving complex problems in high-concurrency and large-scale network environments.
5. Self-motivated, proactive, with strong teamwork, communication skills, and a customer-oriented mindset (B2B focus).

Preferred Qualifications
1. Experience in designing highly available and disaster recovery architectures; hands-on experience with microservices and high-concurrency platforms.
2. Experience in developing AI security gateway products, with independent insights and a strong understanding of AI security.

About Us
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.

Why Join ByteDance
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.

Security Web Gateway R&D Engineer