harmonic-security-inc - Software Development Engineer in Test
Requirements
• 5+ years as an SDET building and maintaining automated test infrastructure • Strong programming skills in at least one of TypeScript, Java, or Rust • Experience with modern test frameworks and willingness to learn new ones (the stack includes Jest, Playwright, Bun test, Vitest, JUnit5, Selenium, and Rust's native testing via cargo test) • Cross-platform testing experience, comfortable setting up environments, debugging platform-specific issues, and working with VMs or real machines • CI/CD pipeline knowledge, integrating tests into GitLab CI or similar, setting up quality gates, and making reports useful • Demonstrable experience using AI tools to speed up workflows and boost productivity • Solid debugging skills and proficiency with Git, code review, and CI/CD systems • YOU MIGHT BE A FIT IF YOU • Take proactive ownership of quality, seeking out risks before they reach production • Bring a thorough, creative approach to complex and often custom testing challenges • Write test code with the same rigour, readability, and discipline as production code • Balance broad coverage with observability, reliability, and fast, meaningful feedback • Thrive in a fast-paced startup environment where ambiguity and continuous improvement are the norm
Responsibilities
• Design, implement, and maintain test frameworks for our UI, browser extensions, endpoint agent, or backend services - you'll need to apply yourself wherever QA is needed • Build and run cross-platform tests on Windows, macOS, and Linux - set up test environments to validate our endpoint agent doesn't break user systems • Expand, run, and investigate load tests to validate system behaviour at scale and ensure we can handle growth • Investigate bugs, write failing tests, get them fixed - file detailed tickets, write tests that expose the issue, fix it yourself if you can, or partner with engineers to verify the fix • Integrate tests into CI/CD - add tests to GitLab CI pipelines, set up quality gates and detailed test reports, keep tests fast and reliable • Monitor, triage, and improve - file detailed bugs in Jira, escalate critical issues quickly, track test coverage, shape the QA roadmap
Benefits
• This isn't just a job - it's a chance to help define a category. Harmonic Security was named to the Rising in Cyber 2026 list, and we're just getting started. We're building at the intersection of AI and security, carving out an emerging market where the rules haven't been written yet, and the people who join now will write them. • We believe today's talent is tomorrow's success, and we're committed to creating an environment where you can do the best work of your life. • Recognized momentum - We made the Rising in Cyber 2026 list, a signal that the market is taking notice • Rare market opportunity - Join early in a category-defining company at the convergence of AI and security, where your work directly shapes how enterprises tackle one of the biggest unsolved problems in tech • Competitive pay and meaningful equity - A real stake in Harmonic's success, not a token gesture • Comprehensive benefits - pension plan and flexible hybrid work • A small, high-trust team that values transparency, creativity, and continuous learning - no politics, no bureaucracy • Thoughtful leadership - that cares deeply about your growth, not just your output • Annual global off-sites - past trips include Lisbon, Portugal and Nashville, TN • Real ownership - you'll shape the product, the culture, and the direction of the company from day one • HARMONIC'S CORE VALUES • 🌱 Flourish in the Unknown • We embrace new, unfamiliar situations that require initiative and rapid decision-making. We orient ourselves quickly and deliver results with minimal guidance. • We raise our hands, take on challenges, and assist others whenever possible. We hunger for opportunities to learn and do more. • 🤝 Perfect Harmony • We support one another to create cohesion and unity. We collaborate openly, share feedback honestly, and help everyone produce their best work
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