Software Developer - Multiple Levels - TS/SCI Poly Required

Leidos; United States; On-site; USD 90,000 - 130,000; Full time

Job summary

Leidos is looking for Software Developers in Reston, VA, at various experience levels to support a government customer. The role requires strong technical skills and experience in full-stack development, as well as the ability to work in dynamic environments.

Successful candidates will be part of a fast-paced mission-focused team developing innovative software solutions. The position requires an active TS/SCI with Polygraph and offers a collaborative work setting with opportunities for growth.

Qualifications

• 4+ years of experience for Mid-Level Software Developers.
• 8+ years of experience for Senior Software Development Engineers.
• 12+ years of experience for Principal Software Development Engineers.

Responsibilities

• Design and maintain mission-focused software applications.
• Support ETL pipelines and data integration workflows.
• Integrate AI/ML capabilities into applications.

Skills

Java

Python

JavaScript

TypeScript

Full-stack development

SQL/NoSQL databases

Docker

AWS cloud services

AI/ML

Education

Bachelor's degree in Computer Science or related field

Master's degree

Tools

Docker

Linux/Unix

AWS

Job description

Description

The Analysis Solutions Business Area at Leidos is seeking Software Developers at multiple experience levels to support a government customer in Reston, VA. Candidates will join a fast‑paced, mission‑focused team of government and contractor personnel developing innovative software and data‑driven solutions. Successful candidates will bring strong technical skills, creativity, attention to detail, and the ability to solve complex problems in dynamic environments.

This position is onsite in Reston, VA and requires an active TS/SCI with Polygraph for consideration.

Basic Qualifications by level

Mid‑Level Software Development Engineer

• Bachelor's degree in Computer Science, Information Systems, Systems Engineering, or related field 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, including modern front‑end frameworks (React/Angular) and backend services/APIs
• Familiarity with SQL/NoSQL databases, ETL pipelines, and Docker/containerized environments
• Exposure to cloud platforms (AWS preferred) and DevOps practices
• Experience integrating AI/ML or LLM‑based capabilities is a plus

Senior Software Development Engineer

• 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
• Experience integrating AI/ML, LLMs, or RAG‑based solutions into production systems
• Ability to lead development efforts and mentor junior engineers

Principal Software Development Engineer / Technical Lead

• 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
• Excellent communication and stakeholder engagement skills

Key Responsibilities

• 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

Preferred Skills

• Strong problem‑solving and analytical abilities
• Experience working in Linux/Unix and Dockerized environments
• Familiarity with AWS cloud services and DevOps methodologies
• Ability to work independently and collaboratively in fast‑paced mission environments
• Strong written and verbal communication skills

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.