This Senior Software Engineer (Back-end) role in Hanoi, Vietnam involves designing and developing backend services, systems, and platforms for gaming products. Responsibilities include writing clean, efficient, and maintainable code, building reusable libraries and tools, analyzing requirements, developing high-performance features, troubleshooting issues, optimizing system performance, collaborating with cross-functional teams, and developing supporting utilities. The ideal candidate will have 2+ years of experience in web technologies and security, a solid foundation in computer science, proficiency in programming languages (Python, Node.js, C++, Go, or Java), experience with Linux environments, multi-threaded programming, web servers, and network protocols, and a passion for gaming. Bonus points for project management and leadership experience.