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LeidosLE

Sr. Data Scientist/Developer

Leidos is an American defense, aviation, information technology, and biomedical research company that provides scientific, engineering, systems integration, and technical services to government and commercial customers.

Leidos

Employee count: 5000+

Salary: 126k-228k USD

United States only

Looking for an opportunity to make an impact?

At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contribute to our communities, and operate sustainably. Everything we do is built on a commitment to do the right thing for our customers, our people, and our community. Our Mission, Vision, and Values guide the way we do business.

If this sounds like a mission you want to be a part of, keep reading!

The Digital Modernization Sector is focused on delivering performance-based IT services and repeatable solutions to include applying cloud-factory and aaS (as a Service) capabilities and integrating commercial products to provide a comprehensive digital engineering approach to IT transformation. Our team is solving the world’s toughest security challenges for customers with “can’t fail” missions. To explore and learn more, click here!

Candidates MUST:

Be located in the United States for the current three consecutive years.
Be a US Citizen or US Person with the ability to obtain and maintain a Public Trust clearance.
This is a telework position; however, the candidate must reside in the Washington, D.C., Northern Virginia, or Maryland area.

Leidos is seeking an experienced AI GPTSenior Data Scientist/Developer who can bring creative ideas to solve complex problems, both technical and procedural, to the team. The ability to be adaptable and to work constructively with a technically diverse and geographically separated team is crucial. You will work as an integral part of an Agile Scrum team, supporting development within an innovative AI GPT technology.

Key Responsibilities:

  • Key contributor in developing and implementing business solutions to address requirements, optimize efficiency, and deliver real content seamlessly.

  • Apply in-depth skills and broad knowledge to develop and implement machine learning systems to improve and streamline operations.

  • Write eloquent, reusable code that effectively solves problems.

  • Integrate with existing cloud services to solve complex extraction problems, such as analyzing and searching documents at scale.

  • Also working with:

    • Web application infrastructure

    • Proficiency with relational database systems such as PostgreSQL

    • Security Documentation

    • LLM Orchestration (calling tools or agents)

    • Prompt Engineering

Required Qualifications and Experience:

  • Master's degree and a minimum of 15 years of technical experience.

  • Approximately 6 to 8 years of application development experience.

  • Proven development experience with client-server / distributed systems / cloud computing.

  • Experience in using AI/ML models, chatbots and robotics to help internal teams promote diverse business outcomes and drive innovation.

  • Strong collaboration skills and desire to work within a team.

  • Ability to work in a fast paced, constantly changing environment.

  • Works well with limited oversight.

Required Technical Skills:

  • Python

  • TypeScript

  • Other object-oriented programming languages

  • React.js

  • Cloud Architecture

  • Experience with Large Language Models (LLM) and Retrieval-Augmented Generation (RAG) architecture

Additional Technical Skills:

  • Web application infrastructure

  • Security Documentation

  • LLM Orchestration (calling tools or agents)

  • Prompt engineering

  • Database management (SQL, NoSQL)

  • API development and integration

  • Natural Language Processing (NLP) techniques

  • Containerization (Docker, Kubernetes)

  • CI/CD Pipelines

  • Monitoring and Logging tools (e.g., ELK stack, Prometheus, Azure Analytics)

  • Knowledge of privacy and security measures for handling sensitive data

Come join our rapidly growing team and enjoy these benefits:

  • Paid Time Off (PTO) accrued based on Leidos policy, up to 3 weeks a year.

  • Eleven (11) paid holidays per year.

  • Access to benefits on day one including medical and dental insurance, 401K, Life, AD&D, Voluntary Disability plans.

  • Ongoing training to support your success.

  • Discounted Leidos stock purchase and other Employee Discounts.

At Leidos, we don’t want someone who "fits the mold"—we want someone who melts it down and builds something better. This is a role for the restless, the over-caffeinated, the ones who ask, “what’s next?” before the dust settles on “what’s now.”

If you’re already scheming step 20 while everyone else is still debating step 2… good. You’ll fit right in.

Original Posting:

July 31, 2025

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 $126,100.00 - $227,950.00

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 the job

Apply before

Posted on

Job type

Full Time

Experience level

Senior

Salary

Salary: 126k-228k USD

Location requirements

Hiring timezones

United States +/- 0 hours

About Leidos

Learn more about Leidos and their company culture.

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Leidos' story begins in 1969 when Dr. J. Robert Beyster, a visionary scientist, founded Science Applications Incorporated (SAI) in La Jolla, San Diego, California. With a modest investment and a powerful idea, Dr. Beyster embarked on a journey to apply scientific expertise to solve complex problems. The company's early days were marked by a focus on research and engineering, tackling challenges for various government and commercial clients. One of its initial significant projects involved studying radiation-based cancer therapy for the Los Alamos National Laboratory, which laid the groundwork for Leidos' future health business. SAI soon expanded its reach, opening an office in Albuquerque to support the Air Force Weapons Laboratory's work on electromagnetic phenomena, a precursor to the company's Physical Science Group.

Throughout the 1980s, the company, then known as Science Applications International Corporation (SAIC), strategically shifted its focus towards national security and defense, solidifying its position as a key government services provider. This era set the stage for substantial growth and diversification. The 1990s saw SAIC continue to expand its offerings and international presence, securing its first major global contract with the Kuwaiti Defense Forces. A pivotal moment arrived in 2013 when SAIC underwent a significant transformation, splitting into two independent, publicly traded companies: a new company retaining the SAIC name and the original company, which was rebranded as Leidos (a name derived from 'kaleidoscope'). Leidos, as the legal successor to the original SAIC, inherited its pre-2013 stock price and corporate filing history and established its new headquarters in Reston, Virginia. This strategic move allowed Leidos to sharpen its focus on national security, health, and engineering solutions. Another major milestone occurred in August 2016 when Leidos merged with Lockheed Martin's Information Systems & Global Solutions (IS&GS) business, a landmark transaction that created the defense industry's largest IT services provider and significantly expanded Leidos' capabilities and market share. Today, Leidos stands as a Fortune 500® global science and technology leader, employing approximately 47,000 people worldwide and generating billions in annual revenue, committed to making the world safer, healthier, and more efficient through innovation and technology.

Employee benefits

Learn about the employee benefits and perks provided at Leidos.

View benefits

Paid sick days

Leidos offers paid sick days.

Health Insurance

Leidos offers health insurance.

Dental Insurance

Leidos offers dental insurance.

Vision Insurance

Leidos offers vision insurance.

View Leidos's employee benefits
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Leidos

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