Senior Software Engineer

Description

The Senior Software Engineer will serve as an experienced technical contributor solving complex technical issues and driving innovation within the team. This individual will play a key role in leading technical projects, mentoring engineers, and ensuring the delivery of secure, high-quality software solutions. The role also emphasizes leveraging AI-assisted coding tools, such as Claude Code, to enhance productivity and innovation.

• Technical Leadership and
  
  Collaboration:
  
  
  • Lead the design, development, testing, and maintenance of software solutions using C#.
  • Provide technical guidance and mentorship to engineers at all levels.
  • Foster team collaboration and alignment with best practices.
• Software Development and Security Compliance:
  • Develop software that adheres to industry security standards and enhances security compliance.
  • Apply object-oriented design principles and patterns to ensure code reusability and maintainability.
  • Implement Test-Driven Development (TDD) and Continuous Integration practices.
• AI-Assisted Coding and Innovation:
  • Utilize AI-assisted coding tools, such as Claude Code, to streamline development processes and enhance code quality.
  • Drive innovation by researching and integrating best practices into software solutions, including AI-based methodologies.
• Problem Solving and Innovation:
  • Evaluate and troubleshoot complex technical issues, providing guidance to engineers and Field Service Engineers.
  • Drive innovation by researching and integrating best practices into software solutions.
• Customer Interaction:
  • Interact with customers to understand requirements and provide technical solutions.
  • Explain technical trade-offs and solutions to non-technical stakeholders.
• Project Estimation and Sustainability:
  • Develop project estimates for budgeting and scheduling, including allocations for sustaining engineering and technical debt remediation.
  • Incorporate forward-thinking strategies to support sustainable product lines.

• 8–12 years of experience in software development, with a strong programming background in C#.
• Proven ability to lead technical projects and mentor engineers.
• Expertise in object-oriented design principles and Agile methodologies.
• Strong troubleshooting and problem-solving skills.
• Effective communication and collaboration skills in cross-functional team environments.

• Experience with AI-assisted coding tools, such as Claude Code, to enhance productivity and code quality.
• Proficiency with revision control systems (e.g., Git), multi-threading, networking protocols, and Web Services.
• Familiarity with security compliance standards in software development.
• Knowledge of UML and documented design methodologies.

• Bachelor’s degree in computer science or a related field and 8–12 years of relevant experience.

Come break things (in a good way). Then build them smarter.

We're the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.”

Original Posting: December 29, 2025

Pay Range: $ - $

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include 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.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit  .

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and…