As a Principal QA Engineer, you will be a technical leader, driving the strategy and execution of product feature verification for Optical DWDM Equipment and Protocol verification (OTN, GBE, DWDM, System Security). This role offers the opportunity to apply your expertise in complex system testing, automation, and cross-functional collaboration to ensure high-quality, carrier-grade products. If you are passionate about mentoring teams, defining robust test strategies, and contributing to continuous improvement, this position provides a platform to make a significant impact on product quality and customer satisfaction.