At Leidos, we are advancing mission-critical platforms that simulate, interact with, and act on complex technical and business environments. These platforms leverage agent-based architectures, automation, and AI-driven capabilities to enable intent-driven interaction with systems such as network operations and enterprise processes.
As a mid-level Software Engineer, you will be a hands-on contributor building backend services, intelligent agents, and automation workflows that power these platforms. You will work within a multi-disciplinary team of software engineers, systems engineers, ISSEs, and security professionals, collaborating in GitLab to deliver secure, scalable, and compliant AI-enabled solutions.
This role is ideal for a developer who is excited about treating systems, automation, and knowledge as code-from infrastructure and deployment pipelines to agent behavior, workflows, and even operational or business logic. You enjoy working with AI and LLMs, building agents that reason and act, and expressing complex intent declaratively through version-controlled artifacts that can be tested, reviewed, and evolved over time.
Primary Responsibilities
Design, develop, and maintain backend services and microservices that support intelligent, agent-based platforms
Build and integrate autonomous or semi-autonomous agents that interact with technical and business systems
Develop AI-enabled workflows leveraging LLMs for decision support, automation, analysis, and system interaction
Implement APIs and orchestration logic that enable agents and services to collaborate effectively
Implement and maintain Infrastructure as Code (IaC) to provision and manage cloud environments
Collaborate with systems engineers and ISSEs to translate requirements and security controls into code
Contribute to Git-based development workflows, including pull/merge requests, code reviews, and documentation
Support CI/CD pipelines and secure deployments aligned with ATO requirements
Produce clear technical documentation covering code, agent behavior, and system interactions
Contribute to an "everything as code" approach, expressing infrastructure, automation, agent behavior, workflows, and operational artifacts as version-controlled, testable code
Required Skills and Experience
BS degree and 4+ years of professional software development experience
Proficiency in at least one modern programming language (Python preferred; Java or Go acceptable)
Experience building backend services, APIs, or microservices
Exposure to AI/ML systems, LLMs, or intelligent automation (through professional work or applied projects)
Familiarity with Infrastructure as Code concepts and tooling
Experience working in GitLab and/or GitHub with collaborative development practices
Ability to operate effectively in environments with evolving or ambiguous requirements
Must have and maintain a Secret security clearance
Preferred Qualifications
Active Security+ certification or equivalent IAT Level II certification
Experience building or orchestrating agents, workflows, or autonomous systems
Familiarity with LLM integration patterns (prompting, tools/functions, retrieval, etc.)
Experience with containerization and orchestration technologies (Docker, Kubernetes)
Familiarity with cloud platforms (AWS GovCloud preferred)
Experience developing AI-enabled systems in regulated or secure environments
If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.
Original Posting: October 22, 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 $87,100.00 - $157,450.00
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
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 www.Leidos.com.
Pay and Benefits
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 Retirement. More details are available at www.leidos.com/careers/pay-benefits.
Securing Your Data
Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com.
If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.
Commitment to 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 will also consider for employment qualified applicants with criminal histories consistent with relevant laws.
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About the role
This is a Mid Level role in the Technology field (Software engineering) at Leidos. Mid-level roles usually expect some years of relevant experience and the ability to work with limited supervision.
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Company description (from The Muse): Leidos is a Fortune 500® innovation company rapidly addressing the world’s most vexing challenges in national security and health.
size: Large Size; industries: Information Technology; locations on The Muse: Reston, VA.
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What is the Software Engineering - Intelligent Platforms (Mid) job at Leidos?
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