Senior Software Engineer

Leidos Holding$107K — $195K *
Aerospace & Defense
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's or Master's Degree with relevant years of experience (8+ years or 6+ years respectively)
  • Active Top Secret/SCI clearance with Polygraph availability
  • Proficiency in C# programming and API development
  • Knowledge of SQL Server, ETL processes, and application-level security
  • Hands-on experience with microservices and logging systems

Responsibilities

  • Develop and maintain software applications using C#
  • Implement API development, ETL processes, and enterprise search capabilities
  • Utilize DevOps tools like GitLab or Jenkins for CI/CD practices
  • Monitor automated system integration tests and resolve system abnormalities
  • Foster collaboration within the team to deliver high-quality solutions

Benefits

  • Work in a mission-driven team focused on cutting-edge technology
  • Engage in a DevSecOps environment to enhance system availability
  • Collaboration with cross-functional teams including Systems Engineers and Architects
  • Involvement in complex software projects with biometric systems and AI/ML applications
  • Opportunity for skill enhancement in cloud architecture and DevOps practices
Full Job Description
Leidos is seeking a TS/SCI cleared Senior Software Engineer to join our mission-driven team. This role supports our client's efforts to design and implement a cutting-edge data-centric architecture leveraging cloud-based computing, artificial intelligence (AI), machine learning (ML), and cross-domain transfer systems.

About the Role:

As a Senior Software Engineer, you will:
  • Work in a DevSecOps environment to ensure the availability of biometric systems and data for end users.
  • Lead the integration, maintenance, and monitoring of software systems to ensure constant availability of technical resources.
  • Design, implement, and enhance complex software systems, including processing-intensive analytics, real-time systems, and business management information systems.
  • Collaborate with Systems Engineers, Software Engineers, Architects, and Operations teams to develop enterprise AFEM (Automated Facial Extraction and Matching) capabilities.
  • Participate in test, staging, and production deployments, ensuring system reliability and performance.


Key Responsibilities:
  • Develop and maintain software applications using C#
  • Implement API development, ETL processes, and enterprise search capabilities (e.g., Elasticsearch).
  • Utilize DevOps tools like GitLab or Jenkins for CI/CD practices.
  • Monitor automated system integration tests and resolve system abnormalities.
  • Foster collaboration within the team to deliver high-quality solutions to customers.


Required Qualifications:
  • Education: Bachelor's Degree with 8+ years of relevant experience or Master's Degree with 6+ years of relevant experience. Additional years of experience may be substituted for a degree.
  • Clearance: Active Top Secret/SCI clearance with the ability to obtain and maintain Poly.
  • Technical Skills:
    • Proficiency in C# programming and API development.
    • Knowledge of SQL Server, ETL processes, and application-level security.
    • Hands-on experience with microservices and logging systems.


Preferred Qualifications:
  • Familiarity with biometric systems and SDKs.
  • Experience with containerization (e.g., Docker) and DevOps tools
  • Experience with AWS cloud-based architecture and services like Lambda.
  • Experience with GPU for processing using CUDA, PyTorch, etc.
  • Knowledge of GraphQL, Python, Bash, Apache NiFi, and Kafka.
  • Active certifications such as Security+ or CE.
  • Proficiency with Linux server management and tools optimized for cross-platform environments.

#NMECDTP-Leidos

Original Posting:
May 4, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:
Pay Range $107,900.00 - $195,050.00

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 (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.

About Leidos Holding

Leidos Holding Careers

Joining Leidos Holding presents an unparalleled opportunity to advance one's career with a leader in innovation and technology. The company offers a plethora of job opportunities aimed at fostering professional growth and development in a diverse and inclusive environment.

Explore Career Opportunities

Leidos Holding is actively seeking skilled professionals who are passionate about leveraging their expertise to drive innovation and leadership in their fields. With a variety of open positions, Leidos Holding provides a platform for individuals to challenge themselves in a dynamic work environment.

Innovation and Professional Growth

At Leidos Holding, innovation is at the core of everything they do. Employees are encouraged to think creatively and push boundaries. The company supports this drive for innovation through comprehensive professional development and diversity training programs that are designed to enhance skills and foster leadership.

Commitment to Diversity and Inclusion

Leidos Holding is committed to creating a workplace where diversity is not only recognized but celebrated. With a culture that values and promotes diversity, Leidos Holding ensures that all team members have the opportunity to contribute, learn, and grow.

Internship Programs

For those starting their career, Leidos Holding offers internship programs that provide a robust foundation in the industry. Internships are a great way to develop essential skills, gain valuable work experience, and build professional networks.

Benefits and Culture

Employees at Leidos Holding enjoy a range of benefits designed to support their professional and personal lives. The company culture is built on a foundation of respect and integrity, providing a supportive and collaborative environment where every team member is valued.

Join the Team

Leidos Holding is hiring! Explore job opportunities that match your skills and interests. Leidos Holding looks for driven, curious, and innovative individuals to join their team. Positions are available across various disciplines and experience levels.

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Prepare for Your Interview

To prepare for an interview at Leidos Holding, candidates should familiarize themselves with the company's missions and values, update their resumes, and be ready to discuss how their background and skills align with the position they are applying for.

Networking and Career Advancement

Leidos Holding encourages its employees to engage in networking within the company to discover new opportunities for career advancement. The leadership team at Leidos Holding is dedicated to supporting employees in their career paths with ample opportunities for networking and growth.

Explore Leidos Holding Jobs and Careers

Discover the exciting career opportunities at Leidos Holding today. With a commitment to employee growth, innovation, and diversity, Leidos Holding is the perfect place to advance your career. Check out the latest job listings and find your perfect fit at Leidos Holding.

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