Sr Software Testing Engineer Jobs in Virginia (NOW HIRING)

The Senior Software Engineer designs, develops, tests, and maintains complex software applications and mission systems supporting critical government operations. This role provides technical leadership across the software development lifecycle, guiding architecture decisions, mentoring engineers, and driving implementation of scalable, secure, and maintainable solutions. The Senior Software Engineer supports modern software engineering practices, including DevSecOps, cloud-native development, digital engineering, and AI-enabled development capabilities that accelerate delivery, testing, integration, and mission effectiveness. Working closely with architects, systems engineers, product owners, and government stakeholders, this position helps ensure successful delivery of mission-critical capabilities within complex operational environments.

Candidates must possess an active TS/SCI clearance at the time of application. Sponsorship is not available for this position.

• · Lead the design, development, integration, testing, and sustainment of complex software applications and mission systems.
• · Provide technical leadership and mentorship to software engineers, promoting engineering excellence and adherence to best practices.
• · Define software architecture, design patterns, and technical approaches that support scalability, security, maintainability, and performance requirements.
• · Collaborate with systems engineers, architects, product owners, and stakeholders to translate mission needs and technical requirements into software solutions.
• · Develop, review, and optimize code while ensuring compliance with secure coding standards and software quality requirements.
• · Lead implementation of CI/CD pipelines, automated testing, DevSecOps practices, and software deployment strategies.
• · Support integration of software components, APIs, cloud services, and external systems within complex mission environments.
• · Participate in Agile/Scrum activities, technical reviews, and architecture discussions to support program objectives.
• · Troubleshoot and resolve complex software, integration, and performance issues across development and operational environments.
• · Contribute to digital engineering, software modernization, and AI-enabled development initiatives that improve delivery speed, quality, and mission effectiveness.

• Active Top Secret/Sensitive Compartmented Information (TS/SCI) security clearance is required.

• · Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.

• · 8–12 years of experience in software engineering, application development, or systems software development.
• · Demonstrated experience designing, developing, and deploying enterprise or mission-critical software solutions.
• · Experience leading software development efforts and mentoring junior engineers within Agile development environments.
• · Experience developing software using Java, Python, or similar object-oriented programming languages.
• · Experience designing and implementing RESTful APIs, microservices, and service-oriented architectures.
• · Experience with CI/CD pipelines, automated testing frameworks, and DevSecOps practices.
• · Experience supporting software integration, deployment, and sustainment activities within complex technical environments.
• · Experience supporting digital engineering, cloud-native development, software modernization, or AI-enabled development initiatives.

• · Strong knowledge of software engineering principles, architecture patterns, and secure software development practices.
• · Expertise in Agile software development methodologies and DevSecOps concepts.
• · Knowledge of distributed systems, microservices architectures, and API-driven solutions.
• · Understanding of cloud technologies, containerization, and modern deployment approaches.
• · Ability to lead technical discussions, design reviews, and architecture decisions.
• · Strong analytical, troubleshooting, and problem-solving skills in complex operational environments.
• · Ability to communicate technical concepts effectively to engineers, program leadership, and government stakeholders.
• · Ability to balance mission requirements, technical constraints, and delivery schedules.
• · Ability to support mission-critical systems operating within classified environments.

• · Java and Python software development
• · Software architecture and technical design leadership
• · RESTful APIs, microservices, and distributed systems
• · Agile/Scrum development methodologies
• · CI/CD pipeline implementation and DevSecOps practices
• · Automated testing frameworks and software quality engineering
• · Cloud-native development and AWS or Azure services
• · Containerization technologies and orchestration platforms
• · Digital engineering and AI-enabled software development environments
• · Mission system integration and software modernization initiatives

• · AWS Certified Developer – Associate
• · Certified Secure Software Lifecycle Professional (CSSLP)

• Full-time position supporting a federal customer at a contractor site within the Washington, DC Metropolitan Area.

· Candidate must be able to work onsite at government facilities if needed by contract performance.

• Occasional local travel within the National Capital Region (NCR) may be required.

Ad hoc Research Associates, LLC is a veteran-owned services company that delivers innovative solutions tailored to meet the unique needs of its clients. Specializing in Systems Engineering services, the company supports major Department of Defense acquisition programs and Research & Development projects across areas such as Cyber Analytics, Modeling & Simulation, Systems Integration, and Test & Evaluation.

Job Overview

We are seeking a highly skilled Software Engineer Subject Matter Expert (SME) to join our dynamic team. In this role, you will leverage your extensive technical expertise to develop, integrate, and optimize complex software solutions. Your contributions will be instrumental in advancing our research initiatives and supporting critical defense systems through innovative application development, system integration, and infrastructure management. This position offers an exciting opportunity to work on cutting-edge projects within a collaborative environment that values technical excellence and continuous improvement.

• 401(k)
• 401(k) matching
• Dental insurance
• Health insurance
• Life insurance
• Paid time off
• Parental leave
• Referral program
• Vision insurance

• Bachelor's (Required)

• Software development: 10 years (Required)

• Top Secret (Required)

• Chantilly, VA 20153 (Required)