Fantom Corporation is a mission-focused organization supporting critical programs across the defense and intelligence community. We partner with our customers to deliver high-impact technical solutions while fostering a culture built on trust, expertise, and long-term career growth. We are seeking a Software Engineer to support the full Operations and Maintenance (O&M) software lifecycle for mission-critical enterprise applications. This role is responsible for developing, maintaining, testing, and enhancing secure web applications while supporting cloud infrastructure, DevSecOps processes, and modern software development practices. The ideal candidate has experience with ServiceNow development, JavaScript-based web technologies, .NET development, cloud platforms, and enterprise application support within secure government environments. This position works closely with cross-functional teams to deliver scalable, secure, and accessible applications that support mission objectives.