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Senior Principal Software Engineer – Algorithm Team - EOIR

BAE Systems
Merrimack, NH Full Time
POSTED ON 7/11/2026 CLOSED ON 8/10/2026

What are the responsibilities and job description for the Senior Principal Software Engineer – Algorithm Team - EOIR position at BAE Systems?


Job Description
See what you’re missing. Our employees work on the world’s most advanced electronics –from detecting threats for F-35 pilots to illuminating the night for soldiers. Spanning air, land, sea, and space, we are developing the technology of tomorrow, delivered today. Drawing strength from our differences, we’re innovating for the future. And you can, too.

Our engineers are the lifeblood of our company and we’re more than 5,000 strong. We offer a flexible "9/80" schedule with every other Friday off. Additionally, with our robust offering of educational and career development opportunities, your chances to grow are limitless.

In Countermeasure & Electromagnetic Attack Solutions, we provide next-generation threat detection and countermeasure solutions to provide unparalleled electronic warfare capabilities to enhance mission survivability.

Job Description
We are looking for talented Senior Principal Level Software engineers to help us create the world’s most advanced solutions in areas such as Signals Intelligence (SIGINT), Aircraft Protection, Radar Warning and Electronic Attack for our defense related customers. Our products provide critical mission capabilities to address the ever-evolving challenges and threats to our nation’s security and the war fighter.

You will be an integrated team member, with leadership opportunities, collaborating with Systems, Hardware, and Test engineers in one or more of the phases of Project Planning, Requirements Development, Design, Development, Integration and Testing. You will prepare design and project documentation intended to be used within complex programs or across sets of programs in accordance with established processes. You will provide technical leadership, project management, and guidance for the software engineering development activities. We will provide you opportunities to learn, leverage our current technologies, incorporate new technologies, and be a leader in our engineering organization. We put our customers first – exemplified by our mission: “We Protect Those Who Protect Us®.”

Job Responsibilities
  • Opportunities are available as a technical lead on the program where you will mentor your team and present the technical design at technical interchange meetings with the customer.
  • Duties include analyzing, designing, coding and code modification (typically in C ) of complex software and algorithm designs for simple systems or subsystems or subsystems of larger systems.
  • Evaluate complex software designs to identify design flaws.
  • Establish communication to keep management informed of the function’s progress and results.
  • Use existing processes and evolve processes to utilize the most effective new techniques as they become available, assuring the use of methodologies which minimize both design cost and product cost.
  • Provide, directly or indirectly, top level technical leadership for the assigned design discipline(s) including selection and exploitation of promising new technologies, long-term goals, etc.
  • Ensure effective communication between assigned engineers and all other participants in the design process.
  • Subject Matter Expertise in Algorithm Design with Electro-optical Infra-red or related technologies.



Required Education, Experience, & Skills
  • Bachelor's Degree in computer science, computer engineering, or related field, and minimum of 8 years work experience or equivalent experience.
  • Current Secret Security Clearance (active within 2 years)
  • Object-Oriented language proficiency in C
  • Machine Learning and Algorithm development
  • Software algorithm development and optimization
  • Previous experience in technical/project team leadership
  • Embedded software development or software application development experience
  • Experience with software engineering processes, methodologies, and tools
  • Experience performing software testing, validation, and verification activities
  • Extensive background in embedded and/or application software development in one or more: C , Python, Java


Preferred Education, Experience, & Skills
  • Master's Degree in Computer Science or Computer Engineering with 6 years experience.
  • Experience with algorithm development and optimization in C , CUDA, or Open CL
  • Full Life-Cycle Software development
  • Requirements Creation
  • Trade Studies
  • GPU Experience
  • Software automated test development and execution
  • Agile Development experience
  • Model Based System Engineering
  • Experience creating and/or working with Digital Twins
  • Experience presenting to and working with government customers


Pay Information
Full-Time Salary Range: $132962 - $226035

Please note: This range is based on our market pay structures. However, individual salaries are determined by a variety of factors including, but not limited to: business considerations, local market conditions, and internal equity, as well as candidate qualifications, such as skills, education, and experience.

Employee Benefits: At BAE Systems, we support our employees in all aspects of their life, including their health and financial well-being. Regular employees scheduled to work 20 hours per week are offered: health, dental, and vision insurance; health savings accounts; a 401(k) savings plan; disability coverage; and life and accident insurance. We also have an employee assistance program, a legal plan, and other perks including discounts on things like home, auto, and pet insurance. Our leave programs include paid time off, paid holidays, as well as other types of leave, including paid parental, military, bereavement, and any applicable federal and state sick leave. Employees may participate in the company recognition program to receive monetary or non-monetary recognition awards. Other incentives may be available based on position level and/or job specifics.


About BAE Systems Electronic Systems
BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Improving the future and protecting lives is an ambitious mission, but it’s what we do at BAE Systems. Working here means using your passion and ingenuity where it counts – defending national security with breakthrough technology, superior products, and intelligence solutions. As you develop the latest technology and defend national security, you will continually hone your skills on a team—making a big impact on a global scale. At BAE Systems, you’ll find a rewarding career that truly makes a difference. Electronic Systems (ES) is the global innovator behind BAE Systems’ game-changing defense and commercial electronics. Exploiting every electron, we push the limits of what is possible, giving our customers the edge and our employees opportunities to change the world. Our products and capabilities can be found everywhere – from the depths of the ocean to the far reaches of space. At our core are more than 14,000 highly talented Electronic Systems employees with the brightest minds in the industry, we make an impact – for our customers and the communities we serve.

This position will be posted for at least 5 calendar days. The posting will remain active until the position is filled, or a qualified pool of candidates is identified.

Salary : $132,962 - $226,035

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