Job responsibilities:

1. Module development: Design, develop, and maintain Nginx or OpenResty's C and Lua modules to enhance the security and performance of web applications.
2. Security vulnerability repair: Analyze and fix security vulnerabilities in the C module and Lua module to ensure the security of web applications.
3. Implementation of defense mechanisms: Use the C module and Lua module to implement various defense mechanisms, such as preventing cross site scripting attacks (XSS), SQL injection, malicious file uploads, etc.
4. Collaboration and Communication: Effectively collaborate and communicate with team members, security teams, and other relevant departments to ensure the smooth progress of security development work.

Job requirements:

1. Bachelor's degree or above, majoring in electronics, computer science, software, information security or related fields.
2. Have experience in designing and developing CDN backend systems.
3. Familiar with CDN related concepts, protocols, and technologies, including content distribution, load balancing, caching, etc.
4. Proficient in C/C++programming language, with experience in developing C and Lua modules in Nginx or Openrest.
5. Possess basic knowledge and understanding of web application security.
6. Familiar with common security vulnerabilities and attack methods, and have corresponding defense experience.

Job responsibilities:

1. Coordinate and organize the needs of business departments, independently complete the development of Android or iOS client programs, as well as the design, coding, and testing of application modules, as well as pre research and research on related functions;
2. Responsible for the development and maintenance of IoT SDKs related to Android or iOS.
3. Responsible for product launch, maintenance, and subsequent version updates and technical support, improving user experience and usability.
4. Continuously improve and optimize the product development process to enhance development capabilities and efficiency.

Job requirements:

1. Bachelor's degree or above in computer, electronics, or software engineering, with at least 3 years of experience in client development.
2. Familiar with the development process of Android or iOS mobile platform apps, as well as high-performance programming and performance tuning.
3. Proficient in Java/C/C++, understanding Java's runtime mechanism, possessing design and code reading skills.
4. Familiar with APK file packaging format, understanding Android/iOS system architecture and security mechanisms, as well as Java/JNI/C/C++memory management mechanisms, familiar with mobile network communication mechanisms.

Job responsibilities:

1. Lead and coordinate backend developers to complete development work.
2. Responsible for platform requirement acceptance, analysis, and design work, responsible for writing core functional codes and system operation and maintenance work, ensuring system security and stability.
3. Possess a certain level of technical design/architectural thinking to ensure that the designed technical solution and developed code have high performance, quality assurance, scalability, and foresight.
4. Responsible for solving complex issues on the platform, considering the development of the platform and formulating reasonable architecture plans.

Job requirements:

1. Bachelor's degree or above, with five years or more of experience in developing Java, QT, C/C++desktop programs or web backend systems.
2. Familiar with the design and application of Java/Swing desktop programs, QT desktop programs, high concurrency, distributed, Redis, RabbitMQ, workflow engines, and other systems.
3. Familiar with multithreading and high-performance design, coding, and performance tuning; Experience in developing high concurrency applications is preferred.
4. Proactive and task oriented, with strong team leadership and coordination skills, good teamwork spirit, and communication skills.

Job responsibilities:

1. Responsible for hardware circuit design and debugging of application products.
2. Conduct schematic and PCB design and simulation based on project progress.
3. Write design and testing documents.
4. Responsible for product debugging and coordinating with software engineers for product function debugging.
5. After becoming familiar with the project, be responsible for coordinating with the production department.
6. Complete daily work and internal material management for department delivery.

Job requirements:

1. Bachelor's degree or above, major in computer, electronics, and related fields.
2. Proficient in both analog and digital circuits.
3. Proficient in using mainstream PCB design software, able to independently perform schematic and PCB design, and have strong hands-on debugging skills.
4. Possess a sense of teamwork, strong sense of responsibility, and the ability to handle problems independently.