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Senior Backend Engineer – Rust

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Qualgo

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Location:
Vietnam , Ho Chi Minh City

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Contract Type:
Not provided

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Salary:

Not provided

Job Description:

As a Senior Engineer - Rust, you will be a vital member of our engineering team, dedicated to designing, developing, and optimizing a critical Rust-based library that serves as a foundational component for our cybersecurity products. This library will be engineered for exceptional performance, high concurrency, a minimal footprint, and uncompromising memory safety, enabling our products (such as secured and high-performance security library, endpoint security agents, or threat detection systems) to operate efficiently and securely at scale. You will be a hands-on contributor, writing robust Rust code, designing elegant APIs, and ensuring the library meets stringent quality, performance, and security standards. Your work will directly impact the core capabilities and resilience of our cybersecurity offerings.

Job Responsibility:

  • Design, implement, and maintain high-quality, reusable, and efficient Rust code for the core cybersecurity library
  • Develop clear, well-documented, and ergonomic APIs for internal teams to consume the library
  • Ensure the library is architected for testability, maintainability, and extensibility
  • Focus on achieving high performance and low latency in all library components
  • Profile and optimize code for CPU usage, memory footprint, and concurrency
  • Implement efficient data structures and algorithms suitable for cybersecurity processing tasks
  • Leverage Rust's ownership, borrowing, and concurrency features (e.g., async/await, Send/Sync traits) to build highly concurrent and thread-safe library components
  • Ensure all code adheres to Rust's memory safety guarantees, minimizing vulnerabilities
  • Write comprehensive unit, integration, and potentially property-based tests to ensure library correctness and robustness
  • Participate in code reviews, providing and receiving constructive feedback to maintain high code quality
  • Contribute to benchmarking efforts to validate performance targets
  • Work closely with other engineering teams (product developers, platform engineers) who will be consumers of the library, gathering requirements and providing support
  • Create and maintain thorough documentation for the library's APIs, usage patterns, and internal design
  • Troubleshoot and debug complex issues related to performance, concurrency, or memory management within the library
  • Stay up-to-date with the latest Rust language features, ecosystem developments, and best practices relevant to library development and cybersecurity
  • Propose and explore innovative approaches to solve challenging technical problems within the library's domain

Requirements:

  • Bachelor's degree in Computer Science, Engineering, or a related field
  • Minimum of 5+ years of software engineering experience, with significant hands-on experience in Rust development
  • Proven experience designing, building, and maintaining libraries, SDKs, or core system components, preferably in Rust, C++, or similar systems programming languages
  • Demonstrable experience delivering code that meets high-performance, high-concurrency, and low-footprint requirements
  • Deep understanding of Rust's core concepts: ownership, borrowing, lifetimes, traits, generics, error handling, and asynchronous programming (async/await)
  • Experience with performance profiling tools and techniques for Rust applications
  • Strong experience with API design principles and creating developer-friendly interfaces
  • Solid understanding of testing methodologies and experience with Rust testing frameworks
  • Familiarity with common data structures, algorithms, and their performance characteristics
  • Experience with Git and CI/CD practices
  • Experience working in an Agile environment
  • Exceptional proficiency in Rust programming
  • Strong analytical and problem-solving skills, with an ability to tackle complex technical challenges
  • Excellent understanding of software design patterns and principles
  • Meticulous attention to detail and a commitment to code quality
  • Good communication and collaboration skills, with an ability to explain complex technical concepts clearly
  • Passion for building robust, efficient, and secure foundational software components
  • Self-motivated and able to work effectively as an individual contributor within a team
  • Fluency in English & Vietnamese

Nice to have:

  • Experience with low-level networking concepts (TCP/IP, UDP)
  • Experience with cybersecurity concepts or developing components for security products
  • Experience with FFI (Foreign Function Interface) for interoperability with other languages (e.g., C, Python)
What we offer:
  • Meaningful work & impact
  • Competitive rewards
  • Growth & well-being
  • People & workspace
  • Young & dynamic environment

Additional Information:

Job Posted:
January 09, 2026

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