Junior Java Developer Jobs in Lawton, OK (NOW HIRING)

Leidos is seeking a talented Junior CEMA Software Engineer in Lawton, OK to join our local development team to create unique solutions for complex problems in engineering, spectrum warfare, and defense domains.
As a Junior CEMA Software Engineer, you will bring your passion for software design and development to design, build, deploy, and maintain mission critical solutions that support our customers' mission objectives.
Our team is primarily in-person in Lawton. Culturally, we place emphasis on trust, respect, asynchronous communication, creativity, and valuing the mission of our customers.
Primary Responsibilities

• Support a team of software engineers in developing offensive and defensive cyber tools focused on radar, C2, surface-to-air, and artillery systems.
• Develop simulations to emulate threat-representative Cyber and Electromagnetic Activities (CEMA) effects and environments.
• Research current and future cybersecurity threats against military systems.

Basic Qualifications

• Candidate must possess at least a Bachelor's Degree in Electrical Engineering, Computer Engineering, Software Engineering, Computer Science, or related technical degree.
• Candidate must be willing to travel approx. 10% each year if necessary - moderate travel to testing locations, typically CONUS.
• Experience with Agile software development, CI/CD toolchains, and DevOps (e.g., Atlassian suite, git, Jenkins, Artifactory).
• Proficient in Python (OOP) or C++.
• Experience working as a member of a Scrum team, contributing to iterative development and Agile collaboration.
• Must live in or be willing to relocate to Lawton, OK.
• Must be a US Citizen.
• Must have the ability to obtain and maintain a Final Top-Secret clearance.

Preferred Qualifications

• Experience in software architecture and design.
• Deep understanding of Linux platforms.
• Experience with Modern C++ (17/20) standards.
• Understanding of multi-threaded programming.
• Experience and interest in cybersecurity.
• Experience and interest in fundamental networking implementations and concepts.
• Experience and interest in machine learning and data science.
• Experience with PySide, Qt, or QML for application/UI development
• Experience with the following tools, concepts, and products is a plus:
  • Ubuntu, Red Hat, Kali Linux, or similar
  • Networking Protocols
  • Wireshark

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:
August 13, 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 $57,850.00 - $104,575.00
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.