Software Developer

Leidos; St. Louis (MO); On-site; USD 70,000 - 126,000; Full time

Job summary

Leidos FS2 Aero team in St. Louis, MO seeks a junior software developer to design and code software solutions for the Aeronautical Navigation Office.

The role builds on a foundation in software development concepts, using a variety of tools and a strong ambition for future projects in support of the mission. You will work with AWS services, C#/Java, JavaScript/TypeScript, Python, OpenShift, Docker, React, PostgresSQL, GraphQL, and Prisma; participate in Agile processes and DevOps with Gitlab,

Qualifications

• BS degree or higher with 2+ years of relevant experience, or MS with <2 years of experience, or 4+ years of related experience.
• Experience with REACT or modern JavaScript framework.
• Experience with Python, C# development framework.
• Experience with unit testing, CI tools, and Gitlab version control.
• Proactive self-starter with strong communication skills.
• Experience in software development or integration projects in cloud/virtualization environments.

Responsibilities

• Understand core AWS services and deploy core services (Lambda, EC2).
• Develop with C#/Java, JavaScript/TypeScript, Python; work with OpenShift, Docker, React, PostgresSQL, GraphQL, Prisma.
• Create and document new/existing functionality in gitlab and apply DevOps practices within Agile workflows.

Skills

AWS services

JavaScript/TypeScript

C#/ .NET

Python

React

Gitlab

CI/CD

Communication

Education

BS degree

Tools

OpenShift

Docker

Postgres SQL

GraphQL

Prisma

Jira

Confluence

REST API

Node

Job description

Description

The Leidos FS2 Aero team has an opening for a junior software developer to work on the design and coding with software solutions for the Aeronautical Navigation Office. The ideal candidate has a familiarity with and a baseline understanding of software development concepts, developing coding skills using different tools, and ambition towards future projects in support of the mission.

Primary Responsibilities

• The applicant must possess an understanding of core AWS services, like compute, storage and be able to develop and deploy cores services (Lambda, EC2s).
• C#/Java and JavaScript/TypeScript, Python, OpenShift, Shell scripting, Docker, React, Postgres SQL, GraphQL (and Apollo) and Prisma.
• This role includes creation and documentation of new and existing functionality within software version control repositories (gitlab) and utilizing DevOps principals and tools to deliver new features within an Agile construct.
• Participate in program Agile software development initiatives (standup, planning, Increment planning) to support innovation and enhancement of custom applications through iteration/functionality testing utilizing Atlassian (Jira/Confluence)
• Primary responsibilities will involve using cloud computing expertise to provide the system administration and modification of existing GOTS code to integrate open-source software solutions for display in a web application. This role includes API development and database integration for interaction with Redux and React frameworks, using various open-source packages for visualization and data filtering and code modifications that shall apply best practices in unit and build testing.
• Participate and collaborate with team members to assess tickets to ensure proper testing and delivery of functionality per User Story Acceptance Criteria

Basic Qualifications

• Active Top Secret with ability to obtain a SCI post hire
• Typically requires BS degree and 2+ years of prior relevant experience or Masters with less than 2 years; OR 4+ years of related experience.
• Experience with REACT or modern JavaScript framework.
• Experience with Python, C# development framework
• Experience with unit testing, continuous integration tools, and Gitlab version control
• Proactive self-starter demonstrates a positive, willing attitude and excellent oral and written communication skills.
• Experience in either software development projects or software integration projects in a service-oriented environment (Cloud, SOA, Web-Services) or virtualization environment.
• Organizational Skills: Can plan and prioritize work. Follows tasks to their logical conclusion and makes sure that everything has been done to the right standard. Good attention to detail.
• Communications: Ability to communicate clearly and efficiently to team members and clients, verbally and in writing. Able to present ideas in a variety of ways depending upon audience and context.

Preferred Qualifications

• AWS Developer Solutions Mindset
• At least 3 years of experience with Linux and/or Windows system administration
• At least 2 years of experience with DoD Aeronautical Datasets
• At least 1 year of experience with AWS cloud formation templates
• At least 1 year of experience with Node, NPM, REST API, Sass
• AWS Solutions, Developer, DevOps certification
• Team Collaboration tools (Jira, Confluence)
• Active TS/SCI with Polygraph
• DOD 8570 Compliant Certification (Sec+)

#NSBA

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:

September 23, 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 $69,550.00 - $125,725.00

The Leidos pay range for this job level is a general guideline onlyand 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 [e-mail].

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.