Rust Back End Engineer Rust, Nodejs, JavaQualgo Technologies

• Design and implement secure communication protocols for end-to-end encryption (E2EE) server and client SDKs.
• Develop and maintain cryptographic algorithms and libraries to secure data transmission and storage.
• Collaborate with cross-functional teams including backend developers, frontend developers, and security experts to integrate E2EE solutions into existing products and platforms.
• Write clean, maintainable, and efficient Rust code following best practices and coding standards.
• Conduct code reviews and provide constructive feedback to ensure code quality and adherence to security standards.
• Perform thorough testing and debugging to identify and fix security vulnerabilities and performance issues.
• Stay up-to-date with the latest advancements in cryptography, security protocols, and Rust programming language.
• Document design decisions, APIs, and implementation details for reference and future maintenance.
• Participate in discussions and brainstorming sessions to contribute ideas for product enhancements and new features.
• Collaborate with the technical support team to troubleshoot and resolve customer issues related to E2EE functionality.

• 7+ years of experience as BE or similar role using Java/NodeJS and with 2-3 years using Rust.
• Proven experience developing server and client-side applications using Rust programming language.
• Strong understanding of cryptography principles, secure communication protocols, and encryption algorithms.
• Experience with cryptographic libraries such as libsodium, OpenSSL, or Ring.
• Familiarity with network protocols such as TCP/IP, HTTP, and WebSocket.
• Solid understanding of concurrent and asynchronous programming in Rust.
• Experience with version control systems, particularly Git.
• Excellent problem-solving skills and attention to detail.
• Strong communication and collaboration skills.
• Ability to work independently and in a team environment.
  
  Optional Experience:
• Experience implementing messaging layer security mechanisms such as end-to-end encryption (E2EE) and message authentication codes (MACs).
• Familiarity with secure messaging protocols like Signal Protocol (formerly known as Axolotl) or Double Ratchet Algorithm.
• Understanding of key exchange protocols such as Diffie-Hellman key exchange and Elliptic Curve Diffie-Hellman (ECDH).
• Knowledge of secure message serialization formats such as Protocol Buffers or JSON Web Encryption (JWE).
• Experience integrating secure messaging features into communication platforms or applications.
  
  Preferred Qualifications:
• Experience with cross-platform development targeting desktop ,mobile, and web platforms.
• Familiarity with containerization technologies such as Docker.
• Knowledge of secure coding practices and common security vulnerabilities.
• Experience with Continuous Integration/Continuous Deployment(CI/CD) pipelines.
• Contributions to open-source projects or participation in the Rust community.

● Annual leave 15 days per year

● Health Insurances, social insurance

● Performance review: twice per year

● Internal training/sharing and professional Training courses

● Team building, company trip, year-end party, monthly activities,....

● Devices: Macbook and screen (If needed)

● Free tea and coffee

● Comfortable working Area

● Working hours: 9 am-6 pm from Monday to Friday