Software Developer (Mid/Senior/Principal)

Job overview

Software Developer (Mid/Senior/Principal), onsite, in Reston, VA. Salary range $87,100.00 - $157,450.00 per year. Leidos is seeking Software Developers at multiple experience levels to support a government customer in Reston, VA. Successful candidates will bring strong technical skills, creativity, attention to detail, and the ability to solve complex problems in dynamic environments, developing mission-focused software applications and data platforms.

What you'll do

• Design, develop, and maintain mission-focused software applications and data platforms.
• Build and support ETL pipelines, APIs, and data integration workflows.
• Develop web-based tools for analysis, visualization, and decision support.
• Integrate AI/ML and advanced analytics capabilities into applications.
• Collaborate with users and cross-functional teams to deliver scalable solutions.
• Support testing, debugging, optimization, and deployment activities.
• Contribute to technical direction, documentation, and engineering best practices.

What we're looking for

Education

Bachelor's degree in Computer Science, Information Systems, Systems Engineering, or related field

Experience

Mid-Level: Bachelor’s degree with 4+ years of experience (or Master’s with 2+ years), 2+ years supporting Intelligence Community or DoD environments, Experience with software development using Java, Python, JavaScript, or TypeScript, Experience with full-stack development, Familiarity with SQL/NoSQL databases, ETL pipelines, and Docker/containerized environments. Senior-Level: Bachelor’s degree with 8+ years of experience (or Master’s with 6+ years), 3+ years supporting Intelligence Community or DoD missions, Advanced experience in software architecture, system design, and scalable application development, Strong background in data pipelines, ETL workflows, APIs, and cloud-native/containerized systems, Experience developing analytic, simulation, or scenario-based applications. Principal-Level: Bachelor’s degree with 12+ years of experience (or Master’s with 10+ years), 3+ years supporting Intelligence Community or DoD missions, Deep expertise in full-stack development, system architecture, and cloud-based platforms, Experience designing complex analytic systems, simulation platforms, and large-scale data pipelines, Strong background in AI/ML, LLM integration, and advanced analytics, Proven ability to lead technical strategy, prototype innovative solutions, and guide engineering teams.

Skills & competencies

software developer

mid-level

senior

principal

leidos

reston va

ts/sci

polygraph

java

python

javascript

typescript

full-stack

react

angular

apis

databases

docker

cloud

aws

devops

ai

ml

llm

data pipelines

etl

Why this role

Experience integrating AI/ML or LLM-based capabilities is a plus. Experience with RMF & Xacta (highly desired).

About the employer

Leidos is hiring for this role. Industry: Other Leather and Allied Product Manufacturing. Sector: 31.