Senior Lead Software Engineer Mission-Critical (Secret)

Liberty Personnel Services, Inc. in Herndon, VA seeks a Senior Software Engineer to lead mission-critical systems, owning from concept through sustainment, with hands-on work in Java and C++.You will shape architectures, drive modernization, mentor engineers, and apply DevSecOps and cloud-native patterns in secure, DoD-adjacent environments to deliver reliable software. This role requires clear technical leadership across distributed systems, APIs, databases, and back-end services.