Senior Software Engineer
At a glance
Senior Software Engineering role at Leidos. Huntsville · full-time · $107,900–$195,050 base.
techroles summary, based on the employer's posting.
What you'll do
- Build software for Linux-based counter-drone and missile-defense systems across their development lifecycle
- Develop and integrate features with a multidisciplinary team in a SAFe workflow using Jira and GitLab
- Apply practices such as peer review, unit testing, and automated testing to keep software dependable
- Investigate and resolve software issues while testing in a hardware-in-the-loop environment
What you bring
- A relevant ABET-accredited bachelor's degree plus at least eight years of experience, or a master's degree plus six years
- Strong working ability in C or C++ and Python, with experience developing in Linux
- Experience across the software lifecycle, Agile teamwork, and software quality practices such as reviews and automated testing
- Hands-on use of Jira and GitLab or equivalent tools, plus experience with Qt or an equivalent development environment
Who this fits
This is a senior software role for someone comfortable contributing across development, integration, and hardware-in-the-loop testing. You must already live in Huntsville, Alabama, or be willing to move there, and you need an active Secret clearance. The position is onsite.
From the employer
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 sustainable. 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.
Are you ready for your next career challenge?
Leidos Defense provides a diverse portfolio of systems, solutions, and services covering land, sea, air, space, and cyberspace for customers worldwide. Solutions for Defense include enterprise and mission IT, large-scale intelligence systems, command and control, geospatial and data analytics, cybersecurity, logistics, training, and intelligence analysis and operations support. Our team is solving the world’s toughest security challenges for customers with “can’t fail” missions.
Within the Defense Sector, Leidos currently has an opening for a talented Software Engineer to work onsite in our Huntsville office. This is an exciting opportunity to use your experience to develop software for critical counter UAS and missile defense solutions.This position focuses on supporting the complete software lifecycle of complex defense systems in a Linux environment using languages like C++ and Python. The Software Engineer will develop software within a Scaled Agile Framework (SAFe) environment, collaborating with multiple stakeholders across a multi-disciplinary team and utilizing software best practices to create unique solutions for complex mission-critical problems.
Primary Responsibilities
- Developing software for use in a Linux environment
- Developing software in a SAFe environment using Jira and Gitlab
- Collaborating with multi-disciplinary teams to implement desired software functionality
- Utilizing software best practices such as peer reviewing and unit testing
- Debugging and troubleshooting software in a HWIL setting
Basic Qualifications
- Bachelor’s degree in Software Engineering, Computer Science, Computer Engineering, or equivalent degree from an ABET-accredited university with 8+ years of experience or Master’s degree and 6+ years.
- Strong competency in at least C/C++, Python
- Experience with software engineering throughout the software lifecycle
- Experience with software best practices such as peer reviews, automated testing, and document generation
- Experience collaborating with other functional groups (systems engineering, electrical engineering, test, etc.) to create a software product
- Experience working within an Agile environment (or equivalent)
- Experience using tools such as Jira and Gitlab (or equivalent)
- Experience developing within Qt IDE (or equivalent)
- Experience developing in a Linux environment
- Familiarity troubleshooting/testing software in an HWIL environment
- Currently living in Huntsville, AL or willing to relocate
- Currently holds an active Secret clearance
Preferred Qualifications
- Experience with Buildroot and VMWare
- Experience using Wireshark and developing software that sends communications over a network (UDP/TCP)
- Supporting and maintaining CI/CD pipelines
- DoD acquisition processes and methods
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 25, 2026For 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 $107,900.00 - $195,050.00The 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.
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