Location US-MD-Annapolis Junction

ID 2026-8799

Markon is seeking an experienced Senior Software Engineer Level 2 to support a customer in the Annapolis Junction, MD area. This role will focus on developing, maintaining, and enhancing complex software systems supporting the XKS mission. The position requires strong C++ development expertise, with an emphasis on data ingestion, processing, and component development within high-performance analytic environments. The engineer will work as part of a core development team to design, integrate, test, and optimize mission-critical software solutions.

• Design, develop, maintain, and enhance complex software applications using C++.

• Develop and optimize data ingestion and processing components supporting large-scale analytic systems.

• Analyze system requirements and translate them into software designs, technical specifications, and functional components.

• Develop and integrate software components supporting high-volume data processing and real-time analytic capabilities.

• Debug, troubleshoot, and resolve software defects to improve system reliability and performance.

• Conduct software testing, code reviews, and quality assurance to ensure compliance with design requirements.

• Evaluate software architecture, component reuse, and integration of existing technologies to support system development.

• Collaborate with the core development team, systems engineers, and other technical stakeholders to deliver mission-focused solutions.

• Develop and maintain software documentation, test results, and technical artifacts.

• Support software integration, performance optimization, and ongoing system enhancements.

• Active TS/SCI clearance with Polygraph completed within the last 5 years required.

• Bachelor’s degree in Computer Science, Software Engineering, or a related technical field. Four additional years of relevant software engineering experience may be substituted for the degree.

• 14+ years of experience in software engineering supporting programs or contracts of similar scope, type, and complexity.

• Strong hands-on experience developing and maintaining software using C++.

• Experience developing data ingestion, processing, and software components within complex systems.

• Experience with software design, development, integration, testing, and troubleshooting.

• Strong understanding of software engineering principles, algorithms, and performance optimization.

• Ability to work collaboratively within a core software development team.

• Strong analytical, problem-solving, and technical communication skills.

Desired Qualifications

• Experience supporting XKS or similar Intelligence Community analytic platforms.

• Experience developing software for large-scale data processing or high-throughput environments.

• Familiarity with distributed systems, real-time processing, and complex data architectures.

• Experience optimizing C++ applications for performance, scalability, and reliability.

USD $120,000.00 - USD $145,000.00 /Yr.

The Markon pay range for this position is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Eager to join a team where your skills are valued, your growth is nurtured, and your impact is profound? Look no further than Markon, a premier consulting firm deeply dedicated to advancing our nation's most critical missions.

At Markon, we don't just offer jobs – we offer opportunities for personal and professional transformation. Empowering our employees to lead, innovate, and excel, we foster an environment where new ideas are not just welcomed but celebrated. As a perennial Washington Post Top Workplace, we prioritize the well-being and success of our team members, ensuring they can bring their best selves to work.

Headquartered in Falls Church, Virginia, Markon has garnered national recognition for our unwavering dedication to excellence in serving the intelligence community, as well as federal civilian and defense agencies. Our growing reach extends across 17 states, 116 countries, and 5 continents, where our team of dynamic professionals collaborates to deliver unparalleled program and project management services.

Markon values people and the tremendous impact each individual can make – which is why we’re consistently recognized as one of the best places to work in federal government consulting. Here, you can help solve the nation’s most important challenges, surrounded by colleagues who help you grow, advance, and succeed. We are deeply dedicated to what matters – bringing out the best in each other to advance our clients’ missions.

Join us and make a meaningful impact.

Markon is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, national origin, age, protected veteran status, or disability status. This job posting will remain open until the position is filled.

Benefits Offered: Medical, Dental, Vision, Life Insurance, Short-Term Disability, Long-Term Disability, 401(k) match, Flexible Spending Accounts, EAP, Training and Tuition Assistance, Paid Time Off, and Holidays.

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