Javascript Engineer (IV-V)

Experienced JavaScript Engineer to co-own design, development, and ongoing maintenance of Confiant's client-side JavaScript SDK for malvertising detection and blocking; focus on high-performance, embedded SDKs across a large and diverse publisher base; optimize runtime performance, minimize payload and memory footprint, and implement robust versioning, deployment, and distribution strategies; translate security threat intelligence into SDK-level detection logic; instrument the SDK for observability and reliability; collaborate with security researchers to stay ahead of evolving techniques; perform rigorous profiling, benchmarking, and regression testing; establish and champion engineering best practices and release processes; debugging production issues across multiple browsers and platforms.