LCG Inc. is seeking a Full Stack Developer, Senior (O365/SharePoint/ Power Platform Developer) to support a client. This role focuses on full-lifecycle web development, SharePoint support, intranet modernization, accessibility compliance, and Agile DevSecOps delivery for a high-visibility federal health environment. The ideal candidate will have strong hands-on development experience, excellent communication skills, and a deep understanding of modern web technologies, secure development practices, and federal accessibility requirements (Section 508). The developer will work closely with federal staff, system owners, security officers, and the Web Support Team to maintain, enhance, and modernize client web platforms.