Fulltime Freelance Java Developer Jobs in Alabama

We're hiring Software Developers at multiple levels.

Leidos Defense Sensors is seeking multiple Software Developers across various experience levels to join our Sensor Research and Analysis Division and support critical missile defense programs. We are hiring for several types of software development roles, including positions focused on feature and enabler development within Agile teams, as well as roles dedicated to defect resolution and rapidresponse support during major test events.

As a Software Developer, you will develop, create, and modify general computer application software and specialized utility programs. You will also analyze user needs and translate them into effective software solutions for our customers. Depending on the specific role, you may work directly on an Agile Software Development team to help achieve key program objectives in support of our national defense.

Ideal candidates bring strong analytical and problemsolving skills, work effectively in a collaborative team environment, and build strong working relationships with peers and technical staff across the program. In all of these roles, you will play a vital part in enhancing system performance and advancing missioncritical objectives in support of our national defense.

Primary Responsibilities

• Perform highlevel software development using C++, Java, or similar languages, including design, development, troubleshooting, and debugging of software components.

• Collaborate with program experts and usercommunity stakeholders to design, enhance, and debug existing software, and to develop new capabilities for integration into existing systems.

• Apply sound software engineering principles to ensure code is modifiable, efficient, reliable, understandable, faulttolerant, and reusable; support software process management and control throughout the development lifecycle.

• Create and maintain automated software builds and pipelines within a Continuous Integration/Continuous Deployment (CI/CD) environment.

• Contribute to software development activities as part of an Agile team, including Program Increment (PI) Planning, Feature and Story development, Sprint Planning, Iteration Retrospectives, and related team ceremonies.

• Participate in team and programlevel demos, including Sprint Reviews, to showcase completed work and support continuous improvement.

• Maintain a positive, proactive, and collaborative attitude, contributing to a productive team culture and demonstrating enthusiasm for solving complex challenges.

Basic Qualifications

This posting is for multiple opportunities ranging in years of experience. Level of opportunity, including compensation, will be matched to a candidate's experience. If you're excited about the work but your experience level differs - PLEASE APPLY!

• Bachelor of Science in Computer Science, Software Engineering, or a related technical field from an ABETaccredited institution and 2-4 years of experience in the design, development, and testing of realtime software applications and simulations; or a Master's degree in Computer Science, Software Engineering, or a related technical field from an ABETaccredited institution with less than 2 years of relevant experience simulations

• Proficiency in C++

• Experience with Java and user interface development

• Experience with GitLab/Git for version control

• Experience with Red Hat Enterprise Linux (RHEL) environments

• Knowledge of Agile methodologies, such as the Scaled Agile Framework (SAFe), and application of the Agile methodologies within a technical/engineering environment.

• Strong written and verbal communication skills with the ability to create and deliver presentations

• Must be a US citizen possess and maintain an active DoD Secret clearance

• Candidate must be a resident of the North Alabama area to provide full time onsite support

Preferred Qualifications

• Relevant DoD or industry experience in missile defense

• Agile Scrum experience and familiarity with Agile methodologies such as the Scaled Agile Framework (SAFe)

• Experience with Jira, VersionOne, or similar Agile projectmanagement and issuetracking tools

• Experience developing and maintaining CI/CD pipelines (e.g., Ansible, Jenkins)

• Experience with Python

• Familiarity with modeling and simulation tools

• Experience with multicore and multithreaded programming

• Understanding of systems engineering concepts (not required to be a systems engineer)

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:July 8, 2026Pay 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.