Software Engineer (C++) at Opswat

OPSWAT, a global leader in IT, OT, and ICS critical infrastructure cybersecurity, delivers an end-to-end platform that gives public and private sector organizations and enterprises the critical advantage needed to protect their complex networks, secure their devices, and ensure compliance. Over the last 20 years our commitment to innovative technology has earned the trust of more than 1,700 organizations, governments, and institutions globally, solidifying our role in protecting the world’s critical infrastructure and securing our way of life. The Position We are seeking a talented and motivated Software Engineer (C++) to join our growing Technology Office team. You will contribute to building and innovating high-performance, cutting-edge technologies and solutions that power our products across on-premise, cloud, and hybrid environments. Working with modern toolchains and frameworks, you’ll help deliver secure, scalable, and efficient software that makes a real impact. As part of a truly global engineering team (with colleagues in Vietnam, Spain, Romania, UK, US, Georgia, and Hungary), you’ll collaborate closely with talented engineers worldwide—both locally in Ho Chi Minh City and remotely—while enjoying the support of an international, high-performing culture. What You Will Be Doing • Collaborate closely with the Engineering Manager and Romania-based team on planning, architecture, design, development, and maintenance of high-quality applications • Analyze business and technical requirements, define system features, and translate them into robust, maintainable functionality • Write clean, efficient C++ code; conduct thorough code reviews; and develop comprehensive unit tests • Create and maintain clear technical documentation for code, architecture, and processes • Proactively identify and implement improvements in performance, security, reliability, and developer experience • Mentor junior engineers and share best practices across the global team • Partner with distributed engineering teams to deliver secure, up-to-date, and high-performing software What We Need From You • 3+ years of professional software engineering experience • 3+ years of hands-on experience with modern C++ (strong preference for C++17/20 expertise) • Solid proficiency with CMake and GCC toolchain • Deep understanding of: • Multithreading, atomics, synchronization primitives, thread pools, and producer-consumer patterns • Lock contention mitigation and race condition prevention • CPU/memory profiling tools (e.g., perf, VTune, Valgrind, flame graphs) • Cache behavior, memory layout, allocation strategies, and performance implications • Proven track record of optimizing performance-critical code paths • Experience with CI/CD pipelines (ideally TeamCity) • Basic working knowledge of AWS services (S3, API Gateway, DocumentDB) • Good understanding of OS-level concepts (file systems, processes) on both Windows and Linux • Experience with Docker/containerization • Strong grasp of design patterns, OOP principles, and clean code practices • Excellent written and spoken English communication skills It Would Be Nice If You Had • Experience in cybersecurity domains: antivirus (AV), endpoint detection & response (EDR), sandboxing, or malware analysis • Low-level optimizations (SIMD, intrinsics, cache-friendly data structures) • Exposure to machine learning frameworks or concepts • Knowledge of compression algorithms, custom parsers, or binary formats • Experience or strong interest in Rust (we’re actively expanding into Rust and value engineers eager to learn/contribute) Why You’ll Love Working Here • Stable, fast-growing international company with an impressive global customer base • Highly professional, collaborative, and diverse team across multiple continents • Challenging, high-impact projects with real ownership and visibility • Cutting-edge technology stack and continuous investment in modern tools & practices • Attractive, modern office environment in Ho Chi Minh City • Opportunities for growth, mentorship, and international exposure OPSWAT is an equal opportunity employer. We celebrate diversity and are committed to providing an environment where equal employment opportunities are extended to all employees and applicants, free of discrimination and harassment of any type. All employment decisions are based on individual qualifications, job requirements, and business needs without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other category protected by federal, state, or local laws. Recruiting Agencies: we do not accept unsolicited resumes from third party agencies for any of our open positions. To submit resumes for our jobs, there must be a recruiting contract approved by our legal team and endorsed by both parties. We are currently not accepting additional 3rd party agencies at this time.