Secret Clearance- Software Engineer

Liberty Personnel Services, Inc.; Herndon (VA); On-site; USD 170,000 - 230,000; Full time

Job summary

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.

Qualifications

• Bachelor’s degree with 9+ years of relevant experience, or graduate degree with 7+ years, or 13+ years of relevant experience in lieu of a degree.
• Experience across the full software development lifecycle.
• Proven technical leadership and ownership mindset.
• Strong software architecture and system design skills.
• Experience with Agile software development methodologies.
• 10+ years of professional software engineering experience (preferred).
• Strong Java and/or C++ development experience.
• Experience with Java Spring Boot and REST API development.
• Linux development environment and multi-threaded application experience.

Responsibilities

• Providing technical leadership across the engineering team
• Taking ownership of software products from concept through sustainment
• Designing and evolving software architectures and system designs
• Driving development across the full software lifecycle
• Mentoring junior engineers and elevating engineering standards
• Leveraging AI-assisted tools to accelerate design, coding, testing, and debugging
• Implementing and maintaining RESTful services and back-end components
• Developing multi-threaded applications in Java and/or C++
• Designing and integrating with relational or distributed databases
• Building and maintaining CI/CD pipelines, including Jenkins-based workflows
• Developing, packaging, and deploying containerized applications
• Supporting Kubernetes, cloud, and hybrid-cloud deployments in secure environments

Skills

Java

C++

Spring Boot

REST API

Linux

Multi-threaded

Cloud deployments

DevSecOps

CI/CD

Jenkins

Docker

Kubernetes

AWS GovCloud

Distributed systems

Software architecture

Agile

Leadership

Education

Bachelor’s degree

Graduate degree

Tools

Jenkins

Docker

Kubernetes

AWS GovCloud

Linux

Job description

Senior Software Engineer - Lead mission-critical systems into the future

Herndon, VA

Own the software that keeps complex missions moving

You’ll be the technical lead driving multiple software products that matter, from modernization efforts to next-generation growth initiatives.

This is full-lifecycle impact - requirements, architecture, implementation, deployment, and sustainment - with you setting the engineering bar for the team.

You’ll mentor engineers, shape system designs, and use modern AI-assisted development tools to ship better software, faster, without sacrificing quality.

If you’ve led serious Java/C++ systems in demanding environments and want more ownership, we want to talk to you.

What You'll Work On

You’ll lead core software engineering efforts across complex, distributed mission systems:

• Enterprise-scale software products supporting critical communications and networking
• System modernization and refactoring of existing capabilities
• New feature development across distributed and multi-threaded applications
• Cloud and hybrid-cloud deployments for demanding environments
• Containerized services and orchestration at scale
• APIs and integration points across databases and subsystems
• DevSecOps, CI/CD, and automated testing practices
• Resilient, cyber-aware software for DoD and telecom-style domains

You’ll be hands-on with technologies like Java, C++, Spring Boot, REST APIs, Linux, Jenkins, Docker, Kubernetes, AWS GovCloud, and modern DBs.

This is where high-end software engineering meets real-world mission constraints.

What You'll Be Doing

• Providing technical leadership across the engineering team
• Taking ownership of software products from concept through sustainment
• Designing and evolving software architectures and system designs
• Driving development across the full software lifecycle
• Mentoring junior engineers and elevating engineering standards
• Leveraging AI-assisted tools to accelerate design, coding, testing, and debugging
• Implementing and maintaining RESTful services and back-end components
• Developing multi-threaded applications in Java and/or C++
• Designing and integrating with relational or distributed databases
• Building and maintaining CI/CD pipelines, including Jenkins-based workflows
• Developing, packaging, and deploying containerized applications
• Supporting Kubernetes, cloud, and hybrid-cloud deployments in secure environments

What We're Looking For

• Bachelor’s degree and 9+ years of relevant experience, OR a graduate degree and 7+ years, OR 13+ years of relevant experience in lieu of a degree
• Experience across the full software development lifecycle
• Proven technical leadership and ownership mindset
• Strong software architecture and system design skills
• Experience with Agile software development methodologies
• 10+ years of professional software engineering experience (preferred)
• Strong Java and/or C++ development experience
• Experience with Java Spring Boot and REST API development
• Linux development environment and multi-threaded application experience

The Experience That Will Really Get Our Attention

You’re the engineer people turn to when a distributed system is misbehaving in production and the stakes are high. You see the big picture, but you’re just as comfortable deep in a core service, a CI/CD pipeline, or a tricky concurrency bug.

Ideally you’ve built and deployed containerized, cyber-aware applications into cloud or hybrid-cloud environments for DoD, SATCOM, networking, gateway, or telecom-like systems – and you know how DevSecOps and automated testing keep them reliable.

Why This Opportunity?

This isn’t a narrow feature factory role. You’ll be the technical adult in the room, steering multiple products that directly support complex, high-value missions.

You’ll own architecture decisions, raise the engineering bar, and shape how AI-assisted development, DevSecOps, and cloud-native patterns are used across the stack.

If you want your next move to combine serious technical depth, real leadership, and visible impact, this is that role.

Active Secret clearance is required.

Interested?

Senior Software Engineer, Lead Software Engineer, Principal Software Engineer, Software Architect, Software Engineering Lead, Java Engineer, C++ Engineer, Spring Boot, REST API, Linux development, multi-threaded applications, distributed systems, enterprise applications, CI/CD, Jenkins, DevSecOps, Docker, Kubernetes, Kubernetes admin, AWS GovCloud, cloud-native, hybrid cloud, cybersecurity-aware development, DoD software, SATCOM, networking, gateway, telecommunications software, Agile development, software modernization, mission-critical systems, Secret clearance