The Senior Software Engineer will be responsible for the development, modification, and advanced support of the Health Information Exchanges (HIE) interfaces for the Contexture Health Information Exchange, and development of HIE tools using solutions and technology such as C#, SQL, MongoDB, APIs, and Web UIs. Support the secure development of new and existing solutions at Contexture through all phases of the Secure Software Development Lifecycle (SSDLC). May require after-hours work for deployments, critical support issues, changes, or major incident response needs. Responsible for cross-functional collaboration and communication to ensure that developed and supported products and services function securely and optimally. Expected to have autonomy in self-driven development efforts requiring on-the-fly decision making. Lead responsibilities for projects may be assigned requiring collaboration with the VP of Application Development & Support and the Product Development Team Lead. Occasionally lead a small team of one or more developers toward a project goal.