Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior Software Systems Engineer (5797)

SubCom

Senior Software Systems Engineer

Position Type Full Time Job Shift 5x2-8a-430p Education Level Masters Degree

Description

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.

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.

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 are Quality, Accountability, Teamwork, and Innovation.

Vacancy posted 4 days ago
Similar jobs that could be interesting for youBased on the Senior Software Systems Engineer (5797) in Portsmouth, NH vacancy
  • $129k

     ...Senior Software Systems Engineer Location: Newington, NH | Salary: $129,000 | Direct Hire Seeking a Software Engineer to design and develop secure, high-performance software solutions that support advanced fiber optic communication networks. This role focuses... 
    Senior
    For contractors
    Local area

    Advantage Technical

    Newington, Strafford County, NH
    4 days ago
  •  ...The Senior Systems Engineers (SE) serves as the technical authority within a project and works across numerous disciplines to ensure Wilcox is...  ...progress, estimated time to completion, risks, and any required software, equipment, tools, etc. necessary to accomplish assigned... 
    Senior
    For contractors
    Work at office
    Local area

    Wilcox Industries

    Portsmouth, NH
    3 days ago
  •  ...Senior System Engineer Department: Infrastructure & IT Management Reports To: Manager, IT Infrastructure Location: Portsmouth, NH Hybrid, 2 days per week on site Build, Secure, and Evolve Mission-Critical Infrastructure Are you an experienced systems... 
    Senior
    Work at office
    Local area
    Immediate start
    Flexible hours
    2 days per week

    FedPoint

    Portsmouth, NH
    15 hours ago
  •  ...Senior Salesforce Platform Software Engineer Do you have the skills - and drive - to join a tech team that's working to digitally transform a trillion...  ...Salesforce-based solutions, you'll analyze issues at the system level—including declarative and programmatic... 
    Senior
    Local area
    Worldwide

    Liberty Information Technology Limited

    Portsmouth, NH
    2 days ago
  •  ...Principal Software Engineer Do you have the skills—and drive—to join a tech team that's working...  ...code, test scripts, components and system architectures, you'll document and build...  ...and efficiency We are looking for a Senior software engineer to join our Small... 
    Senior
    Worldwide

    Liberty Information Technology Limited

    Portsmouth, NH
    2 days ago
  •  ...Senior Associate Software Engineer - Portsmouth, NH Apply now » Date: Jun 2, 2026 Location: Portsmouth, NH, US, 03801 Company: Hubbell Incorporated...  ...environment and in related upstream and downstream systems. This role will work closely with a team of software... 
    Senior
    Flexible hours

    Hubbell Power Systems

    Portsmouth, NH
    4 days ago
  •  ...TL;DR: Senior Software Engineer specializing in TypeScript while using AI daily to build browser automations, seeking a fully remote role within...  ...designed significant parts of production software systems. You value modern engineering principles like TDD, pair programming... 
    Senior
    Full time
    Remote work
    Worldwide
    Flexible hours

    AccessOwl

    Greenland, NH
    10 days ago
  • Role: MES Project Manager Location: Portsmouth, NH - required on site every second week Duration: Fulltime Skills/Experience Must MES Project Management experience Agile project methodology Fluent in English Wish ...
    Senior
    Full time

    Procyon TS

    Portsmouth, NH
    2 days ago
  •  ...company founded by scientists and engineers with a passion for technology...  ...R&D on next-generation systems and technologies for the Department...  .... We are hardware and software developers with experience turning...  ...Subsea Warfare (SSW). The Senior Systems Engineer will lead the... 
    Senior
    Local area
    Immediate start
    Relocation package

    Integer Technologies

    Durham, NH
    3 days ago
  •  ...eligible candidates must work on the client's W2 on the first day, no exceptions** We’re looking for a hands-on Senior Enterprise Systems Engineer / Enterprise Systems Lead to help drive the evolution of enterprise applications and integrations across the organization... 
    Senior
    Full time

    Softworld, a Kelly Company

    Hampton, NH
    4 days ago
  •  ...Senior Autonomous Software Engineer Integer Technologies is an applied research and product development company founded by scientists and engineers...  ...with innovation. We perform R&D on next-generation systems and technologies for the Department of Defense and other... 
    Senior
    Work at office
    Local area
    Immediate start
    Remote work
    Work from home
    Relocation package
    Monday to Friday

    Integer Technologies

    Durham, NH
    1 day ago
  •  ...Job Title Senior Configuration Engineer Job Description We deliver our customers peace of mind...  ...analyzes and significantly configures software, applications, and programs from general...  ...focus in configuration Sapiens URS systems or other systems. Hands-on with... 
    Senior
    Local area
    Remote work
    Visa sponsorship
    Work visa
    Shift work

    Liberty Mutual Insurance Group

    Portsmouth, NH
    1 day ago
  •  ...Senior Cloud Engineer Department: Platform Operations Reports to: Director of Platform Operations Office Location: Portsmouth, NH...  ...cloud environment. Platform Operations delivers strategic systems planning, cloud platform development, and end user support.... 
    Senior
    Work at office
    Local area
    Immediate start
    Remote work
    Flexible hours

    FedPoint

    Portsmouth, NH
    15 hours ago
  •  ...Software Engineer SAIC is seeking a Software Engineer to support the Portsmouth Naval Shipyard (PNSY) Information Technology Programs for...  ...leverages advanced technologies and integrates critical defense systems to optimize ship maintenance through IT applications, systems... 
    Local area

    Science Applications International Corporation

    Kittery, ME
    15 hours ago
  •  ...that provide peace of mind for our customers worldwide. As a software engineer at Liberty Mutual, you'll apply your talents in an agile environment...  ...of software products, you'll analyze issues at the system level and handle any complications that arise by implementing... 
    Local area
    Worldwide

    Liberty Information Technology Limited

    Portsmouth, NH
    10 hours ago
  • $120k - $135k

    A hybrid opportunity for a Senior Android Engineer in Hampton, NH, focusing on Kotlin and modern Android development practices. Collaborate with cross-functional teams to deliver high-quality mobile solutions. Responsibilities include mentoring junior engineers and driving... 
    Senior

    UNAVAILABLE

    Hampton, NH
    4 days ago
  • $120k - $135k

    Planet Fitness is looking for a Senior Android Engineer to lead technical direction and development of Android applications. Your role includes collaborating cross-functionally to deliver user-centered solutions while mentoring junior engineers in a hybrid work environment... 
    Senior

    Planet Fitness

    Hampton, NH
    4 days ago
  • $55.8k - $111.5k

     ...Job Title: Submarine Systems Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: Secret Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US * * * Exciting Career... 
    Full time
    Contract work
    Work experience placement
    Immediate start
    Flexible hours

    CACI International

    Kittery, ME
    2 days ago
  •  ...Responsibilities Seeking a Systems Engineer in Portsmouth, NH. You will be responsible for updating and maintaining computer systems and networks with software and security patches and evaluating application impact. The target systems include Linux Red Hat/CentOS... 
    For contractors

    Arcfield

    Kittery, ME
    4 days ago
  •  ...System Engineer, Level 3 Location: On-site, Portsmouth, NH. Relocation assistance is available for eligible candidates and their families, if needed. The Systems Engineer will support ongoing Lonza operations through technical assistance as it relates to computerized... 
    Relocation package

    Lonza

    Portsmouth, NH
    2 days ago
  • A technology services firm is seeking an experienced Java developer to join their team in Dover, New Hampshire. The ideal candidate will have a strong understanding of Java, WebSphere technologies, and excellent communication skills. Responsibilities include liaising with...
    Senior
    Full time

    TecTammina

    Dover, NH
    1 day ago
  • $120k - $135k

    Overview The Senior Android Engineer is a leading velocity contributor for a cross‑functional delivery Pod, responsible...  ...Computer Engineering, Management Information Systems, etc.). Master’s degree a plus 5+ years of software engineering experience, with a strong focus on... 
    Senior
    Work at office
    Remote work
    Work from home

    Planet Fitness

    Hampton, NH
    4 days ago
  •  ...Job Title: Senior PC Developer Location: Portsmouth, NH Position Type: Contract...  ...maintenance of Majesco Insurance Billing software products The role requires strong handson...  ...manage business rules using the Rules Engine Configure build and test application... 
    Senior
    Contract work

    Ztek Consulting

    Portsmouth, NH
    4 days ago
  •  ...technical problems. Responsible for system analysis, design, coding, testing, debugging...  ...equivalent) in Computer Science, Engineering, Business or related field and 8 years of...  ...experience in the job offered or in a Principal Software Engineer-related occupation. Position... 
    Local area
    Remote work

    Liberty Mutual Insurance

    Portsmouth, NH
    4 days ago
  •  ...flexible, configurable, and resilient to core system constraints. We enable downstream...  ...collaboration, continuous improvement, and engineering excellence, partnering closely with...  ...Overview: We're looking for a Principal Software Engineer to serve as a technical leader... 
    Work at office
    Local area
    Flexible hours

    Liberty Information Technology Limited

    Portsmouth, NH
    4 days ago
  • $120k - $165k

     ...biggest professional sports leagues in the US? Blue Mantis is seeking a highly skilled and versatile, Swiss Army Knife Network Systems Engineer to support enterprise-class data centers and ensure seamless network operations. This role focuses on ensuring high... 
    Full time
    Contract work
    Local area
    Night shift
    Afternoon shift

    GreenPages

    Portsmouth, NH
    2 days ago
  • $115k - $155k

     ...Blue Mantis is looking to hire a Network Systems Engineer to support multiple customers based in the Los Angeles California area. The ideal candidate will be proficient in supporting various systems and applications, including server and cloud environments, and... 
    Hourly pay
    Full time
    Contract work
    Local area

    GreenPages

    Portsmouth, NH
    2 days ago
  • $120k - $165k

     ...biggest professional sports leagues in the US? Blue Mantis is seeking a highly skilled and versatile, Swiss Army Knife Network Systems Engineer to support enterprise-class data centers and ensure seamless network operations. This role focuses on ensuring high... 
    Full time
    Contract work
    Local area
    Night shift
    Day shift

    GreenPages

    Portsmouth, NH
    2 days ago
  •  ...innovative, world class electro-mechanical combat systems for today’s warfighters and law enforcement officers. Senior Firmware Engineers are a core component of the development...  ...requirements, collaborating with Hardware, Software, QA, Systems Engineering, and Program... 
    Senior
    For contractors
    Work at office
    Local area

    Wilcox Industries

    Portsmouth, NH
    2 days ago
  •  ...Synergetics in Portsmouth, NH is seeking a Senior Marketing Associate to lead their content strategy. This hybrid role will involve developing an editorial calendar, creating long-form content, and optimizing distribution through various channels including LinkedIn. The... 
    Senior

    Synergetics Installations Worldwide

    Portsmouth, NH
    1 day ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior Software Systems Engineer (5797). Be the first to apply!