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# Senior Software Systems Engineer (Level 3)

- **Company:** POWER3 SOLUTIONS, LLC
- **Location:** Annapolis Junction, MD, United States
- **Experience:** Expert
- **Salary:** $240,000.0 - $280,000.0
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Amazon Web Services, Systems Engineering, User Authentication, Microsoft Azure, Cloud Computing, Information Systems, Continuous Integration, Information Engineering, DevOps, Design of User Interfaces, Java Web Services, Machine Learning, Systems Development Life Cycle, Software Prototyping, Service-Oriented Architecture, Software Engineering, Product Software Implementation Methods, Software Requirements Analysis, Software Systems, Systems Architecture, Systems Integration, Unstructured Data, Spring-boot, Infrastructure Automation Frameworks, Information Technology, Deployment Automation, Devsecops, Microservices
- **Published:** September 1, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9136090/senior-software-systems-engineer-level-3

## About the Role

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., * 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

## Description

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., * 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.

Primary Focus:

 * 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.