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Senior Software Systems Engineer (5797)

SubCom
Newington, NH Full Time
POSTED ON 4/9/2026
AVAILABLE BEFORE 6/7/2026

Are you looking for an opportunity with plenty of growth potential? Do you enjoy working in an exciting, fast-paced, collaborative environment? Are you interested in working with the world’s most innovative companies to create a more connected world? 

Connecting Continents. Impacting Communities. 

The backbone of the Internet is a series of high-tech subsea fiber optic cables deployed throughout the globe - SubCom has deployed over 50% of them. Our employees ensure data communications networks are engineered, manufactured, deployed to the highest standards, enabling faster and more reliable connectivity to communities worldwide. Every member of the SubCom team plays a role in an end-to-end process that is critical to enterprises, governments, big cities, and rural towns. 

We encourage, expect, and value creativity, thoughtful risk taking, openness to change, and diverse perspectives. Whether you’re a seasoned applicant seeking a new and exciting challenge, or you’re new to the workforce and looking for a flexible, rewarding, and fast-paced position with an innovative and stable organization (since 1953), SubCom has opportunities to advance your career. 

Responsibilities 

 

  • Design, develop, and maintain software that supports fiber‑optic communication systems, with awareness of underlying physical and optical behaviors.
  • Apply system requirements to create reusable, maintainable software features delivered on schedule.
  • Implement and support secure software services, including RESTful and OpenConfig APIs, used in operational network environments.
  • Develop automated unit and integration tests to ensure software correctness, reliability, and security.
  • Analyze existing systems to diagnose software defects, performance issues, and security vulnerabilities, and implement effective solutions.
  • Support ongoing operation and maintenance of fiber communication systems by software simulation and correlating software behavior with physical system characteristics.
  • Collaborate with cross‑functional engineering teams to resolve issues and improve system functionality and robustness.
Qualifications:

Qualifications 

 

  • Graduate degree in Science, Technology, Engineering, or Mathematics—such as Physics, Optical Engineering, Electrical Engineering, Computer Science, or a closely related discipline—with strong physical understanding of fiber‑optic communication systems, including optical components and system‑level behavior.
  • Proficiency in software development using C , C#, SQL, and modern web technologies (e.g., ReactJS).
  • Solid knowledge of software algorithms, data structures, and object‑oriented design principles.
  • Experience with RESTful APIs, Open API / OpenConfig specifications, and Linux‑based development environments (preferably Red Hat).
  • Familiarity with automated software testing practices and source control systems.
  • Understanding of web and application security fundamentals as applied to software development.
  • Effective written and verbal communication skills and ability to work collaboratively in a technical team environment. 

NOTE: This job description is not intended to be all-inclusive. Employee may perform other related duties as negotiated to meet the ongoing needs of the organization. 

Candidates for positions with SubCom must be legally authorized to work in the United States. Employment eligibility verification will be required at the time of hire. Visa sponsorship is not available for this position. 

Our selection procedure is based on local, state and federal law.

Please be sure to attach a resume to your application. We are not able to consider applications without a resume. 

BENEFITS 

SubCom offers a comprehensive benefits package, including but not limited to: competitive salaries, medical, dental, vision, life and disability insurance coverages, FSA, HSA, generous vacation, paid sick leave, paid parental leave, paid holidays, tuition reimbursement, adoption assistance, and a 401(k) plan with generous company match. Additionally, some positions may be eligible for shift differential. 

AFFIRMATIVE ACTION/EQUAL EMPLOYER OPPORTUNITY 

SubCom is committed to providing a work environment that prohibits discrimination based on age, color, disability, ethnicity, marital status, national origin, race, religion, gender, gender identity, sexual orientation, protected veteran status, disability or any other characteristics protected by applicable law or regulation. 

SubCom engineers, manufactures, and installs subsea fiber optic data cables - the unsung heroes of global communication. With an unrelenting focus on quality, reliability, and value, SubCom offers flexible end-to-end building blocks for the high-tech networks that are the backbone of the world's digital infrastructure. While the company's origins date back to the mid-19th century, SubCom has deployed enough cable to circle the equator more than 25 times since its entry into the communications industry in 1955.

SUBCOM’S CORE VALUES 

Quality   -   Accountability   -   Teamwork   -   Innovation 

Salary.com Estimation for Senior Software Systems Engineer (5797) in Newington, NH
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