Software Engineer (Mid-Senior)

i3; Huntsville (AL); On-site; USD 95,000 - 140,000; Full time

Job summary

i3 in Huntsville, AL seeks Software Engineers to design, develop, integrate, test, and sustain mission‑critical command and control (C2) software used by our warfighters and customers around the world. You will join Agile teams, working with systems and test engineers to build robust, secure, and scalable software solutions addressing complex logical and mathematical challenges in Global C2 missions.

The role emphasizes hands‑on development across Java and C++, Linux environments, scripting with

Qualifications

• 5+ years of relevant experience in software development with a STEM degree (Bachelor level)
• 8+ years for senior level with Bachelor's; 6+ with Masters; 4+ with PhD
• Strong OO software development experience in Java and C++

Responsibilities

• Design, develop, document, test, and debug applications and software systems.
• Participate in SAFe Scrum teams to develop and maintain software across baselines for the IBCS program.
• Support testing activities including unit and functional testing, code coverage, and automation.

Skills

Java

C++

Linux

Python

Git / GitLab

SAFe

Jira / Confluence

Education

Bachelor's degree in STEM

Master's degree

PhD

Tools

GitLab

Jira

Confluence

VS Code

Job description

Overview i3 is seeking Software Engineers to join tour team in Huntsville, Alabama. You will help design, develop, integrate, test, and sustain mission‑critical command and control (C2) software used by our warfighters and customers around the world.

In this role, you will support Agile Software Teams, working closely with systems and test engineers to build robust, secure, and scalable software solutions that address complex logical and mathematical challenges in support of Global C2 missions. This position is ideal for engineers who enjoy hands‑on development, solving complex technical problems, and collaborating in a highly integrated, Agile environment.

Responsibilities

Design, develop, document, test, and debug applications and software systems that implement logical and mathematical solutions that are aligned with program objectives.

Participate in Scaled Agile Framework (SAFe) Scrum teams to develop and maintain software products across multiple software baselines for the IBCS program.

Work in a fast‑paced environment with high expectations, diverse assignments, and collaborative team settings across all levels of the organization.

Perform software development and upgrades in multiple programming languages/versions while minimizing changes to the operational behavior of tactical software.

Support documentation creation and updates using Markdown and other collaboration tools.

Support testing activities including unit and functional testing, code coverage analysis, and static code analysis; contribute to continuous improvement of test effectiveness and automation.

Other duties as assigned.

Qualifications Education, Experience and Required skills

• Mid-level: 5 Years of relevant experience with a bachelor's degree in STEM field; 3 Years relevant experience with Masters degree; 1 Years of relevant experience with PhD
• Senior level: 8 Years of relevant experience with a bachelor's degree in STEM field; 6 Years relevant experience with Masters degree; 4 Years of relevant experience with PhD
• Strong object‑oriented software development experience with Java and C++
• Proficiency in Linux‑based development and runtime environments.
• Experience with scripting languages and tools including Bash and Python.
• Experience with modern configuration management and source control tools (Git / GitLab).
• Experience with Agile SAFe and Atlassian Agile tools including Jira and Confluence.
• Active secret clearance and the ability to maintain a clearance required.
• Must be a U.S. Citizen.

Preferred Qualifications

• Experience with Model‑Based Systems Engineering (MBSE), including Cameo or similar tools.
• Experience with DevSecOps and CI/CD pipelines to build, integrate, test and deliver software.
• Experience supporting real‑time or distributed systems using RTI/DDS publish/subscriber middleware.
• Experience with US Army Systems including PATRIOT, LTAMDS, SENTINEL A3/A4, IFF devices, and M_SHORAD.
• Experience with Engagement Planning and Execution, PAC2/PAC3, and AIM9x, and Indirect Fires.
• Track Management: Experience with track management including sensors, composite track, IFF devices, and Combat Identification.
• CompTIA Security+

Physical Demands

The physical demands described here are representative of those that must be met by an employee to successfully perform the essential functions of this job.

While performing the duties of this job, the employee is regularly required to talk or hear. The employee frequently is required to stand; walk; handle or feel; and reach with hands and arms.

The employee is occasionally required to sit; climb or balance; and stoop, kneel, crouch or crawl. The employee must be able to lift and/or move up to 10 pounds and occasionally lift and/or move up to 25 pounds.

Specific vision abilities required by this job include close vision, distance vision, peripheral vision, depth perception and ability to adjust focus.

Regular i3 hours are 8:00 a.m. - 5:00 p.m. Monday-Friday, however, additional hours may be required on occasion.

About i3

Founded in 2007, Integration Innovation, Inc. (i3) is headquartered in Huntsville, AL, with additional offices in Orlando, FL, and the National Capital Region. We are a 100% team member‑owned mid‑tier integrator with over 800 employee‑owners, and our culture speaks for itself: we've earned ten Best Places to Work® awards, driven by strong employee engagement, transparent leadership, and a genuine commitment to communication.

i3 team members operate at the leading edge of national defense across a broad range of technical disciplines, from systems and software engineering to modeling, simulation, and training solutions to cybersecurity, digital engineering, and enterprise IT. We also take products from prototype through production, bringing that same engineering rigor to manufacturing and delivering hardware at scale.

For candidates, that means a rare opportunity: the innovation and mission focus of an engineering services company paired with the hands‑on impact of building and delivering real solutions that benefit the Warfighter, all inside an employee‑owned company where your contributions directly shape both the mission and your ownership stake in the business.