Mid-Level Software Engineer

Join Leidos supporting the Chinook Program for an Intelligence Community (IC) customer. This onsite mid-level software engineering role focuses on delivering features for a national security application, from design through deployment and sustainment. You will build and evolve software components that help enable the customer’s GEOINT mission, working across cloud, DevSecOps, testing, and operational support.

Responsibilities

• Design, develop, integrate, test, deploy, and maintain software supporting the customer’s GEOINT mission.
• Translate functional and technical requirements into software solutions.
• Independently implement moderately complex software features.
• Build application components that are maintainable, scalable, and secure.
• Develop and consume RESTful APIs and backend services.
• Work with relational and/or NoSQL databases.
• Troubleshoot defects, integration issues, and performance problems; perform root-cause analysis and apply corrective actions.
• Create unit, integration, and automated tests and participate in code reviews to reinforce high-quality coding practices.
• Support CI/CD and DevSecOps processes and contribute to containerized environments.
• Participate in agile ceremonies including sprint planning, backlog refinement, demonstrations, and technical working sessions.
• Collaborate with Test Engineering to ensure features meet acceptance criteria and quality expectations.
• Support deployment, monitoring, and sustainment; identify opportunities to improve performance, reliability, maintainability, and security.
• Provide technical guidance to junior engineers and maintain appropriate software and technical documentation.

Requirements

• Active Top Secret/SCI with the ability to successfully pass a Polygraph examination.
• US citizenship required per contract.
• Bachelor’s degree in Computer Science, Software Engineering, or related field with 4-8 years of prior relevant experience, or a Master’s degree with less than 2-6 years of prior relevant experience.
• Equivalent experience may be considered in lieu of degree.
• Proficiency with Web technologies: HTML, CSS, JSON, Ajax, and REST APIs.
• Proficiency with Object-oriented Programming: Python, Java, or JavaScript.
• Proficiency with front-end and back-end frameworks: React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, or Svelte.
• Proficiency with cloud development: AWS, Azure, or similar.
• Proficiency with relational databases: MySQL, PostgreSQL, or SQL Server.
• Proficiency with operating systems: Windows, Linux.
• Proficiency with version control: Git.
• Understanding of modern software design patterns and coding standards.
• Experience architecting, developing, and delivering complex software systems into production.
• Experience with CI/CD tools (GitLab CI, Jenkins) and agile collaboration tools (JIRA, Confluence).
• Familiarity with AWS environments (including C2S or GovCloud) and containerization (Docker, Kubernetes).
• Understanding of secure coding practices and government system accreditation processes (e.g., RMF, STIGs).
• Strong, self-motivated desire to learn new programming languages, tools, frameworks, and techniques.

Preferred Qualifications

• Experience supporting Intelligence Community (IC) mission systems.
• Experience with geospatial, intelligence, or other mission-specific data and workflows.
• Experience with AWS and cloud-native architectures.
• Experience with Infrastructure-as-Code (Terraform, Ansible, CloudFormation).
• Experience with GitLab CI/CD, Jenkins, SonarQube, Nexus, Vault, or Keycloak.
• Experience with PostgreSQL, MySQL, SQL Server, OpenSearch/Elasticsearch, or similar technologies.
• Experience with event-driven architectures and messaging technologies.
• Experience with observability, monitoring, logging, and application performance management.

Technologies

HTML, CSS, JSON, Ajax, REST APIs, Python, Java, JavaScript, React, Angular, Vue.js, jQuery, Spring Boot, Django, Node.js, Flask, Svelte, AWS, Azure, MySQL, PostgreSQL, SQL Server, Windows, Linux, Git, GitLab CI, Jenkins, JIRA, Confluence, Docker, Kubernetes, AWS (C2S or GovCloud), RMF, STIGs, Terraform, Ansible, CloudFormation, SonarQube, Nexus, Vault, Keycloak, OpenSearch/Elasticsearch.

Compensation & Location

Pay range: USD 87,100 - 157,450 per year.

Location: Gaithersburg, MD (onsite). This position may also be performed in: Tucson, AZ; Alexandria, VA; Chantilly, VA; Englewood, CO; St. Louis, MO.

Benefits

• Competitive compensation
• Health and Wellness programs
• Income Protection
• Paid Leave
• Retirement

Original posting: October 15, 2026

Security and Application Integrity

• Leidos will never ask for payment-related information during the employment application process and will not advance money (for example, via check or money order).
• Leidos will only communicate through emails generated by the Leidos.com automated system, not free commercial services or WhatsApp/Telegram.
• If you receive a suspicious Leidos email requesting payment-related or personal information, report it to [email protected].
• If you believe you are a victim of a scam, contact local law enforcement and report to the U.S. Federal Trade Commission.

Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos also considers for employment qualified applicants with criminal histories consistent with relevant laws.