Jr Software Developer

Posted Yesterday
Be an Early Applicant
3 Locations
In-Office
70K-126K Annually
Mid level
Information Technology • Software
The Role
Develop and maintain Java and React software for modernized, cloud-based flight service and air traffic systems. Responsibilities include writing code, testing, debugging, unit and functional testing, troubleshooting technical issues, and supporting systems engineering and test teams. The role operates in an Agile/SAFe, DevSecOps environment and requires collaboration across cross-functional teams, along with eligibility for a Public Trust investigation and U.S. citizenship.
Summary Generated by Built In

Leidos is seeking Software Developers to join the Air Traffic Business Area within the Homeland Sector, supporting the development of next-generation flight service and air traffic systems. This work aligns with the FAA’s broader initiative to modernize legacy flight service capabilities, replacing aging infrastructure with scalable, cloud-based platforms designed to improve safety and operational efficiency—particularly in remote and high-dependency aviation environments. These efforts focus on delivering mission-critical, future-ready solutions that provide safety-critical flight services to the pilot community.


As a member of a Scaled Agile software development organization, you will contribute to the technical execution of a program that integrates proven, globally deployed technologies with modern cloud-native capabilities. You will work alongside cross-functional teams and technical leaders to deliver predictable outcomes in a highly regulated, safety-critical environment. 


In this position, you will design and implement software solutions independently while working closely with systems engineering, product delivery, and DevSecOps teams. The primary focus is on developing containerized applications within an Agile/SAFe environment. This position supports government programs and requires the ability to obtain and maintain a favorable Public Trust investigation.


Primary Responsibilities:


  • Responsible for software development activities both individually and as a member of a team including writing, testing, debugging, and maintaining source code within an Agile environment.
  • Actively participate in daily stand-ups, Release Planning, and other related team activities.
  • Write and execute unit and functional tests.
  • Troubleshoot and participate in the resolution of technical issues in lab and operational environments.
  • Provide support as needed for system engineering, test engineering, and system owner teams.

Basic Qualifications:

  • Bachelor’s degree in computer science or a related field with 2-4 years of relevant experience or a Master’s degree with less than 2 years of experience.                                                           
  • Experience with Java programming language
  • Experience with React
  • Experience with Web development and commonly used front-end tools and languages (HTML, CSS, JavaScript)
  • Experience with Linux
  • Experience with version control systems such as Git or Subversion
  • Experience with common development tools and IDEs (Eclipse, VS Code, etc.)
  • Knowledge of AI-assisted software development tools and workflows (i.e. Claude Code, Codex, etc.)
  • Knowledge of Cloud-based systems
  • Knowledge of unit testing tools such as Junit and Mockito
  • Understanding of sound software development principles and practices
  • Ability to plan and prioritize personal tasking and be able to communicate effectively verbally and in writing
  • Independent thinker, capable of performing high quality work, both independently and with a team in a fast-moving environment
  • Ability to obtain SF-85 Public Trust suitability determination
  • US citizenship required


Preferred Qualifications:

  • Knowledge of or experience working within the Agile/SAFe framework
  • Knowledge of or experience with RESTful API, JSON, XML, XSD
  • Knowledge of or experience with Spring Framework, Spring Security, and Spring Boot
  • Knowledge of or experience with Python programming language
  • Knowledge of or experience with Ansible playbooks and YAML
  • Knowledge of or experience with Linux shell scripting
  • Knowledge of DevSecOps practices and CI/CD pipelines
  • Knowledge of or experience with MongoDB
  • Knowledge of air traffic control and flight services

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 29, 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 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.

Skills Required

  • Bachelor's degree in computer science or related field with 2-4 years of relevant experience
  • Master's degree with less than 2 years of experience
  • Experience with Java
  • Experience with React
  • Experience with web development, HTML, CSS, and JavaScript
  • Experience with Linux
  • Experience with Git or Subversion
  • Experience with development tools and IDEs such as Eclipse or Visual Studio Code
  • Knowledge of AI-assisted software development tools and workflows
  • Knowledge of cloud-based systems
  • Knowledge of unit testing tools such as JUnit and Mockito
  • Understanding of sound software development principles and practices
  • Ability to plan, prioritize tasks, and communicate effectively
  • Ability to work independently and collaboratively in a fast-moving environment
  • Ability to obtain SF-85 Public Trust suitability determination
  • U.S. citizenship
  • Knowledge or experience with Agile/SAFe
  • Knowledge or experience with RESTful APIs, JSON, XML, and XSD
  • Knowledge or experience with Spring Framework, Spring Security, and Spring Boot
  • Knowledge or experience with Python
  • Knowledge or experience with Ansible playbooks and YAML
  • Knowledge or experience with Linux shell scripting
  • Knowledge of DevSecOps practices and CI/CD pipelines
  • Knowledge or experience with MongoDB
  • Knowledge of air traffic control and flight services

Leidos Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Leidos and has not been reviewed or approved by Leidos.

  • Healthcare Strength — Healthcare coverage is described as comprehensive, with multiple plan options, low office-visit copays in some plans, and access to mental health and wellness support tools. The availability of HSA/FSA options and employer contributions is positioned as a meaningful part of the total package.
  • Retirement Support — Retirement benefits are framed as a strong component of total rewards, highlighted by a 401(k) match and immediate vesting in the standard package. The Employee Stock Purchase Plan is also presented as an additional long-term wealth-building feature.
  • Wellbeing & Lifestyle Benefits — Wellbeing and lifestyle supports extend beyond core insurance, including wellness programs, fitness-related stipends, and assistance resources. Work flexibility and related perks are also included as part of the broader rewards experience.

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The Company
HQ: Reston, VA
27,104 Employees
Year Founded: 1969

What We Do

We Are Leidos For 50 years we have been tackling some of the biggest problems that face our nation and our world. OUR MISSION Through our culture of innovation and history of performance, we develop deep customer trust built on integrity and create enduring solutions that improve our world. Leidos is a science and technology solutions leader working to address some of the world’s toughest challenges in the defense, intelligence, homeland security, civil, and healthcare markets. The company’s 43,000 employees support vital missions for government and commercial customers. Headquartered in Reston, Va., Leidos reported annual revenues of approximately $11.09 billion for the fiscal year ended January 3, 2020. Leidos was cited for the meaningful work employees perform that is challenging, impactful, and aligned with our customers’ missions as reasons professionals want to work and stay at our company. Leidos has also been named to lists including Forbes’ Best Employers for Diversity, Forbes’ America’s Best Employers for Women, Military Times Best for Vets Employers, and Ethisphere Institute’s World's Most Ethical Companies®. Employees enjoy career enrichment opportunities available through mobility and development and experience rewarding relationships with supportive supervisors and talented colleagues and customers. Employees appreciate our flexible work environment, allowing for and encouraging a true work-life balance. Our professionals are also excited about our Employee Resource Groups, like the newly launched Collaborative Outreach with Remote and Embedded Employees (CORE), which strives to create an environment where every employee, regardless of location, feels fully engaged as a valued employee of Leidos. Your most important work is ahead.

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