Senior Software Systems Engineer (L3)
- Annapolis Junction, MD
- Permanent
- Full-time
Location: Annapolis Junction, MD
Clearance Required: Active TS/SCI with Polygraph
Position Type: Full-Time, Fully Funded
Salary: $240,000 - $280,000About Our Client
Our client is a mission-driven technology startup built by a team of high-performance professionals with decades of combined experience in the Intelligence Community, cybersecurity, and commercial sectors. They bring a rare balance of humility and leadership—knowing when to listen and when to lead. At their core, they're results-driven innovators who thrive in collaborative environments. If you're looking to contribute to national security while working on cutting-edge solutions, we want to hear from you.Position Overview
We are seeking a hands-on Senior Software Systems Engineer to support mission-critical programs in Annapolis Junction, MD. This role focuses on driving software-heavy systems from concept to delivery in highly secure environments. You'll work directly with technical teams and stakeholders to shape complex system architectures, integrate scalable software solutions, and ensure end-to-end technical alignment using modern engineering frameworks.
If you’re a systems engineer with deep experience in software engineering environments, strong SOA expertise, and a passion for mission-first innovation—we want to hear from you.Key Responsibilities:
- Lead or contribute to Integrated Product Teams (IPTs) focused on designing and developing complex software-centric capabilities.
- Implement Service-Oriented Architecture (SOA) solutions and develop system/service views
- Perform Data Engineering of both structured and unstructured datasets.
- Participate in software design reviews, CCB meetings, and technical milestone events; coordinate cross-discipline resolutions.
- Develop and maintain interface definitions, control documents, and configuration baselines.
- Lead or support verification, validation, and test planning to ensure system deliverables meet functional and security requirements.
- Apply knowledge of Information Assurance (IA) technologies (e.g., authentication, access control, cryptography) to systems designs.
- Contribute to technical assessments, alternative analysis, and software risk management throughout the development lifecycle.
- Use modeling, simulation, and prototyping tools to reduce risk, validate system behavior, and improve engineering outcomes.
- Ensure documentation, systems artifacts, and change control processes are complete, traceable, and aligned with stakeholder needs.
- Design, develop, and maintain scalable, secure Java-based applications within distributed cloud architectures (AWS, Azure, or GCP).
- Serve as a bridge between software implementation and systems-level integration, ensuring functional alignment across services, APIs, and infrastructure.
- Lead the implementation of AI/ML capabilities in operational pipelines, coordinating with data science and platform teams.
- Conduct performance analysis and optimization across application tiers and system boundaries.
- Contribute to CI/CD pipeline design and infrastructure-as-code practices to support automated deployments and monitoring.
- Collaborate with systems engineers, DevOps, and solution architects to translate system requirements into working software components.
- Support full SDLC including requirements analysis, system-level documentation, and verification/testing.
- Provide mentoring and technical guidance to junior developers and systems engineers.
- 60% Hands-on Java development (Spring Boot, microservices)
- 40% Systems design, integration, and architecture alignment
- Operates at the intersection of software build-out and platform-wide reliability.
- Clearance: Active TS/SCI with Polygraph
- Experience: Minimum 20 years of relevant Systems Engineering experience (with a strong emphasis in software-driven environments).
- Education: Bachelor’s degree in Systems Engineering, Computer Science, Information Systems, or a related field. (An additional 5 years of experience may substitute for a degree.)
- Proven experience leading full-lifecycle engineering for complex software or hybrid systems
- Strong familiarity with SOA, Agile development, and DevSecOps environments
- Demonstrated experience supporting C&A efforts, interface design, and software integration
- Ability to communicate technical concepts to a range of audiences and work closely with developers and stakeholders
- AWS certification highly preferred
Our client committed to delivering mission-critical solutions that matter. The team is driven by innovation, collaboration, and a deep respect for national security. You’ll work in a supportive environment where your contributions make a direct impact.Employee Benefits at Navius
Enjoy a comprehensive benefits package designed to support your health, financial security, time off, and professional growth:
- Health & Wellness: Customizable medical, dental, and vision coverage; Health Savings Account (HSA).
- Financial Security: Competitive salaries, 401(k) with up to 12% employer contribution, life and AD&D insurance, short- and long-term disability coverage.
- Time Off: Flexible time off and sick/safe leave to support work-life balance.
- Additional Perks: Annual technology reimbursement, training and development allowance, and a profit-sharing bonus program.