The Senior Software Test Engineer will play a key role in ensuring the quality, performance, and reliability of Carlsmed's web-based applications deployed in AWS. This position involves designing and executing comprehensive test plans, building automated test suites, and collaborating closely with software developers, DevOps, and product teams to deliver robust, secure, and scalable solutions. The ideal candidate is detail-oriented, experienced with test automation frameworks, and comfortable working in an Agile environment. Experience in regulated or safety-critical industries (such as medical devices or healthcare) is a strong plus.