115 Results for

Principal Software Engineer Jobs in New Hampshire

Jobs

$144,200–$288,400 / year

Operating as a senior individual contributor and technical leader, you will partner closely with product, architecture, and engineering leadership to make pragmatic, high‑impact design decisions that balance speed, quality, and long‑term maintainability. You will remain hands‑on with critical‑path systems while mentoring senior and staff engineers, translating prototypes into scalable, production‑grade platforms.

30+ days ago

Hudson, NH

A person born or naturalized in the U.S. who owes allegiance to the U.S. Security Clearance: Many of our positions require the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. Life in New Hampshire, New Hampshire enjoys a coveted location in New England, with beaches, mountains, and lakes all just an hour away.

30+ days ago

Hudson, NH

A person born or naturalized in the U.S. who owes allegiance to the U.S. Security Clearance: Many of our positions require the ability to obtain a U.S. Security Clearance for which the U.S. Government requires U.S. Citizenship. Senior Principal Software Engineer (Sign On Bonus Available) in Nashua, New Hampshire, United States | Engineering & Technology at BAE Systems.

30+ days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US122059BREXTERNAL/FAST-Labs---Senior-Principal-Software-Engineer-(up-to-$20K-Sign-On-Bonus).

30+ days ago

Merrimack, New Hampshire

DE designing data structure to implement scalable and efficient applications using advanced data structure concepts (Binary Tree, Binary Search Tree, Graphs, and Entity Relationship) and Unified Modeling Language (UML) on Microsoft Visio, ArgoUML, and Java models; performing architectural modeling and data flow design using UML and Entity Relationship (ER) diagrams for complex enterprise applications to optimize performance and maintainability; and performing tree operations (tree traversal) using advanced algorithms (Order Tree, Post Order Tree, and Pre Order Tree Traversals) to execute data parsing and hierarchical decision-making, applying custom tree traversal algorithms within rule-based engines.  . DE programming Service Oriented Architecture (SOA) in REST patterns, using Spring framework, OAuth, Swagger, Apache Kafka, and Docker, to perform asynchronous event-drive processing (Kafka and Spring Boot), within a distributed environment; deploying Software as a Service (SaaS) in Cloud Azure Kubernetes Service (AKS), using Deployment as a Service (DaaS) to automate deployment; and scaling containerized services using Helm, AKS, and Azure PostgreSQL within a Continuous Integration and Continuous Delivery/Deployment (CI/CD)-enabled Cloud environment.  .

10 days ago

Merrimack, New Hampshire

Information TechnologyPlease be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. AMT is an integral partner for Asset Management to deliver innovative, scalable, industry-leading investment tools that enable Asset Management to achieve competitive advantage globally.

10 days ago

Salem, NH

Part time

Partner with systems, test, field, and manufacturing teams to resolve integration challenges. Create and improve technical documentation to support long-term system sustainability.

4 days ago

Concord, NH

You will operate at the intersection of hands-on engineering excellence and strategic technical leadership — contributing directly to complex features while shaping how the entire engineering organization builds, scales, and operates its software. + Cloud and Infrastructure: Deep hands-on experience with AWS or Azure including serverless compute, managed messaging (SQS/SNS/Service Bus), managed databases, and cost optimization.

30+ days ago

Nashua, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US123815BREXTERNAL/Software-Lead---Principal-Software-Engineer.

30+ days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US123873BREXTERNAL/FAST-Labs---Senior-Principal-II-Software-Engineer---C++-CUDA-($25K-Sign-on-Bonus).

30+ days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US124189BREXTERNAL/FAST-Labs---Senior-Principal-II-Software-Engineer-(up-to-$20K-Sign-On-Bonus).

30+ days ago

Merrimack, NH

Full time

Support design and development planning, design input and design output activities, risk management activities, Design and Development File management, design transfer activities, change management, and design reviews for medical devices and medical device software. Strong, demonstrated ability to think out of the box to provide technically sound Quality Assurance and Quality System solutions to designated programs to achieve business results and maintain high levels of quality and compliance.

30+ days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US123945BREXTERNAL/FAST-Labs---Principal-Software-Engineer-(up-to-$20K-Sign-On-Bonus).

30+ days ago

Manchester, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US122975BREXTERNAL/F-35-Principal-Software-Engineer-(Sign-on-Bonus-Available).

30+ days ago

Hudson, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US125405BREXTERNAL/CEMA-Principal-Software-Engineer---Team-Lead-(Onsite).

24 days ago

Durham, New Hampshire

Information TechnologyPlease be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. This group leverages a range of technologies to build powerful tools and deliver exceptional user experiences, primarily across the Microsoft ecosystem, including power platform Azure, Microsoft Fabric, and related platforms.

5 days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US123986BREXTERNAL/FAST-Labs-Principal-Software-Engineer---Release-Engineering-&-DevSecOps.

30+ days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US123541BREXTERNAL/Principal-Software-Engineer.

30+ days ago

Merrimack, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US125694BREXTERNAL/Principal-Software-Engineer---Algorithm-Team---EOIR.

17 days ago

Nashua, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US123767BREXTERNAL/Principal-Software-Engineer-(Full-time-On-site).

30+ days ago

Merrimack, New Hampshire

Information TechnologyPlease be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Asset Management Technology is an integral partner for Asset Management to deliver innovative, scalable, industry-leading investment tools that enables the business to achieve competitive advantage globally.

10 days ago

Manchester, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US124598BREXTERNAL/Principal-Electronic-Warfare-Software-Engineer-(Sign-on-Bonus-Available).

30+ days ago

Hudson, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US124223BREXTERNAL/Principal-Embedded-Software-Engineer-(Onsite-&-Sign-On-Bonus-Available).

30+ days ago

Nashua, NH

for description visit the url https://jobs.baesystems.com/global/en/job/BAE1US125172BREXTERNAL/Principal-RF-Test-Software-Engineer-(Hybrid,-Sign-On-Bonus-Available).

30 days ago

Concord, NH

The Senior Software Engineer works closely with a global team of engineers to build robust solutions that meet our business objectives following continuous integration and continuous deployment processes, while supporting software and associate software engineers. Subject to their specialization, this Senior Software Engineer leads the design, development, testing, publishing, and/or support of different cloud-based products and solutions and serves as subject matter expertise for customer implementation and cloud platform support.

30+ days ago

$120,000–$140,000 / year

As a Principal Platform Engineer (DevOps), you bring deep technical ownership to IDEXX's internal developer platforms - shaping the direction of our AWS, GitHub Enterprise, Terraform Cloud, and JFrog Artifactory environments alongside a close-knit agile team. You will be responsible for Platform Development & Technical Leadership: Own the design and architecture of platform capabilities across AWS Organizations, GitHub Enterprise, Terraform Cloud, and JFrog Artifactory - balancing developer experience with security and compliance requirements.

8 days ago

Concord, NH

However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor's legal duty to furnish information. The Principal Systems Engineer works collaboratively with program managers and project engineers to ensure successful program execution and is responsible for guiding program teams to solving problems through a wholistic, systems engineering approach.

30+ days ago

Pelham, NH

What You Will Do: In this Senior Principal Systems Engineer role, you will support the following types of activities: Core Systems Engineering: Develop requirements and algorithms, concepts of operations, and define system interfaces. Support Missions: Travel as needed (up to 20%) to support mission execution at various locations including local RTX facilities, test sites, vendor facilities, and customer locations.

30+ days ago

Hudson, NH

Job Summary Mercury Systems Mixed Signal team has a great opportunity for a seasoned RF Engineer to help us bring cutting edge technology to mission critical aerospace and defense applications advancing innovation where it matters most. The engineering team is looking for a highly experienced RF Engineer who will design and support complex RF/Microwave products through all phases of the product life cycle.

30+ days ago

Hudson, NH

Leadership & business: Proven leadership of multi‑discipline engineering teams; experience partnering with Business Development on captures, bids, BOE/ROM, and technical/management volumes. Technical skills: CONOPS; stakeholder and system requirements; architecture definition; trade studies; interface definition; technical reviews (SRR, PDR, CDR, TRR); technical baseline management; production transition.

23 days ago

Concord, NH

$163,900–$235,550 / year

Operating at a principal level, this role goes well beyond traditional requirements gathering—serving as a trusted advisor, systems strategist, and transformation leader across large, multi-phase programs involving D365 Finance & Operations, and integrated enterprise platforms. This role partners closely with Finance and Go To Market teams and IT leadership to translate complex business objectives into scalable, compliant, and future-ready system solutions.

30+ days ago

Salem, NH

Lead & Inspire: Guide a team of engineers in developing advanced threat detection algorithms using machine learning, deep learning, and classical approaches. We're building the next generation of airport security screening solutions-leveraging breakthroughs in machine learning, deep learning, 3D imaging, and open network architectures.

30+ days ago

Merrimack, NH

Leads development initiatives as technical lead; fills in for the manager as needed • Leads technical resources on major projects, including design sessions and development activities • Provides technical leadership and mentoring to help developers improve their skills. Responsibilities Working under general supervision of the Senior Director, Data Engineering, relying on experience and judgement to plan and accomplish goals, the Principal Data Engineer performs complex data and application integration activities as the highest technical level in support of all corporate information systems across multiple database platforms.

30+ days ago

Portsmouth, NH

This role will work closely with a team of software engineers and technicians, providing hands-on support to ensure the reliability, performance, and ongoing improvement of our software solutions in support of production, NPI, and return/repair processes. Hubbell Utility Solutions (HUS) enable the grid to conduct, communicate and control energy across utility applications and Hubbell Electrical Solutions (HES) are essential to managing power across a wide range of industries and applications.

17 days ago

Portsmouth, NH

The role will be a highly visible hands-on technology driver supporting platform product development by creating innovative solutions, as well as driving solutions that modernize, stabilize, and support the growth of our portfolio. Ability to work collaboratively with Agile methodologies (Scrum, Kanban) and cross-functional teams (Product Owners, Software Engineers, Test Engineers) to drive technology decisions and support engineering excellence.

30+ days ago

Portsmouth, NH

In addition to the minimum qualifications listed below, the ideal candidate will also have: Strong understanding of financial transactional flow, SAP general ledger concepts such as company codes, chart of accounts, ledgers, coding blocks, profit centers, cost centers, currencies, etc. Strong communication skills, with the ability to collaborate effectively with both technical and non-technical stakeholders with a proven track record of collaboration across multiple organizations, business partners and stakeholders.

30+ days ago

Concord, NH

$155,000–$180,000 / year

This role is accountable for defining and documenting control strategies and data interfaces between substation devices, generation resources, data centers, remote operation centers, and external entities, and for driving reliable data connectivity and control readiness from design, commissioning, and turnover. Monitor construction progress remotely and via on site visits, support resolution of field issues, attend in person meetings with stakeholders, and provide on-site programming and field support during commissioning when required.

8 days ago

Merrimack, NH

$132,962–$226,035 / year

Job Description 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. 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.

23 days ago

Merrimack, NH

$132,962–$226,035 / year

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. Lead oversight of project engineering solutions for LV and MV power in commercial/industrial buildings; corroborates/coordinates with other design team members including client, site/civil and mechanical engineers to ensure electrical systems are integrated with the project's goals.

22 days ago

Nashua, NH

$75,800–$113,800 / year

Basic Qualifications for a Principal Field Engineer: Bachelor's degree in a technical field plus 5 years of relevant experience; or an associate's degree in a technical field plus 7 years of relevant experience; or may be able to consider an additional 4 years experience in lieu of a degree. Basic Qualifications for a Field Engineer: Bachelor's degree in a technical field plus 2 years of relevant experience; or an associate's degree in a technical field plus 4 years of relevant experience; may be able to consider an additional 4 years experience in lieu of a degree.

15 days ago

New Hampshire, NH

Collaborate with other engineers and scientists to develop scalable data pipelines for diverse AEC data sources used in production ML systems, including BIM, CAD, and infrastructure design data. Work with large-scale, multi-modal datasets including text and geometric data, to design novel preprocessing, augmentation, analysis and content understanding.

30 days ago

Concord, NH

You will design and build full-stack features end-to-end, write high-quality automated tests, support production systems, and collaborate daily with Product Managers, Designers, QA Engineers, and globally distributed engineering peers. + Participate in the team on‑call rotation, collaborate in war‑rooms to resolve customer‑facing incidents, and contribute data and analysis to post‑incident reviews together with senior engineers and architects.

30+ days ago

Merrimack, NH

Please be advised that Fidelitys business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities investment and retirement-related financial activities, and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Data Center and Network Services (DCNS) is dedicated to the overall global network engineering and support for Fidelity Investments within Enterprise Infrastructure.

30+ days ago

Concord, NH

Experience delivering cloud implementations in regulated environments, including U.S. Government, U.S. Public Sector requirements, FedRAMP, NIST SP 800-53, and Canadian Government, Public Sector requirements, PBMM, GC Cloud Guardrails, ITSG-33, or equivalent, including control mapping, automation, and continuous monitoring. You will map regulatory requirements (e.g., FedRAMP, NIST SP 800-53, PBMM, GC Cloud Guardrails, ITSG-33, or equivalent) to cloud security capabilities such as identity and access management, network segmentation, encryption, and key management, logging, monitoring, vulnerability management, container, Kubernetes security, and continuous compliance.

30+ days ago

Hudson, NH

Mercury Systems is seeking the best and brightest engineering talent to help us deliver cutting‑edge technology for mission‑critical aerospace and defense applications, advancing innovation where it matters most. As a principal mechanical engineer, you will take a hands‑on role in designing, analyzing, and testing complex electronics subsystems that directly support mission‑critical product development.

16 days ago

Hudson, NH

Job Summary: Mercury Systems is seeking the best and brightest talent to help us bring cutting edge technology to mission critical aerospace and defense applications, advancing innovation where it matters most. The Engineering team is looking for a Principal RF Engineer who will provide hands-on technical leadership to a team developing advanced RF Systems for exciting defense applications.

30+ days ago

Pelham, NH

This role will be onsite and based in Pelham, NH, with approximately 60% of the time spent in Pelham and 40% at the Andover, MA site and may require occasional travel to other local and US Domestic locations approximately 5-10% of the time, including occasional evening and weekend work as needed. Join this high impact team as a Network Engineer, Principal Specialist, (P3) to ensure the smooth operation of classified network infrastructure at our Raytheon locations.

11 days ago

Pelham, NH

What You Will Do: • In this Systems Engineer role, you will support the following types of activities: • Core Systems Engineering: Develop requirements and algorithms, concepts of operations, and define system interfaces. • Support Missions: Travel as needed (up to 20%) to support mission execution at various locations including local RTX facilities, test sites, vendor facilities, and customer locations.

30+ days ago

Hudson, NH

In this role, our team is looking for a Principal Electrical Engineer who will architect and lead the development of ruggedized board‑level hardware for advanced embedded computing, high‑speed digital systems, advanced FPGA solutions, secure processing for extreme‑environment electronics across air, land, sea, and space. Architect advanced electrical circuit board solutions incorporating secure processing, storage, networking, FPGA technologies, high‑speed interfaces, and electronics designed for extreme environments.

11 days ago

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Principal Software Engineer Jobs in New Hampshire

Principal Software Engineer CVS Health Corp

Senior Principal Software Engineer BAE Systems Plc

Senior Principal Software Engineer (Sign On Bonus Available) BAE Systems Plc

FAST Labs - Senior Principal Software Engineer (up to $20K Sign On Bonus) BAE Systems Plc

Principal Software Engineer/Developer Fidelity

Principal Software Engineer Fidelity

Principal / Senior Software Engineer (C++, Linux) Analogic Corporation

Principal Engineer, Software Verint Systems, Inc.

Software Lead - Principal Software Engineer BAE Systems Plc

FAST Labs - Senior Principal II Software Engineer - C++ CUDA ($25K Sign-on Bonus) BAE Systems Plc

FAST Labs - Senior Principal II Software Engineer (up to $20K Sign On Bonus) BAE Systems Plc

Principal Software Design Quality Engineer-Medical Device KMC Operations

FAST Labs - Principal Software Engineer (up to $20K Sign On Bonus) BAE Systems Plc

F-35 Principal Software Engineer (Sign-on Bonus Available) BAE Systems Plc

CEMA Principal Software Engineer - Team Lead (Onsite) BAE Systems Plc

Principal Full Stack Software Engineer Fidelity

FAST Labs Principal Software Engineer - Release Engineering & DevSecOps BAE Systems Plc

Principal Software Engineer BAE Systems Plc

Principal Software Engineer - Algorithm Team - EOIR BAE Systems Plc

Principal Software Engineer (Full-time On-site) BAE Systems Plc

Principal Software Engineer - Oracle/PLSQL Fidelity

Principal Electronic Warfare Software Engineer (Sign on Bonus Available) BAE Systems Plc

Principal Embedded Software Engineer (Onsite & Sign On Bonus Available) BAE Systems Plc

Principal RF Test Software Engineer (Hybrid, Sign On Bonus Available) BAE Systems Plc

Sr. Engineer, Software Verint Systems, Inc.

Principal Platform Engineer (DevOps) Idexx Laboratories Inc

Principal Systems Engineer Trident Systems Inc

Senior Principal Systems Engineer RTX Corp

Sr. Principal RF Engineer Mercury Systems Inc

Sr. Principal Systems Engineer Mercury Systems Inc

Sr Principal SW Development Engineer UKG

Sr. Principal Algorithm Engineer Analogic Corp

Principal Data Engineer PC Connection Inc

Senior Associate Software Engineer - Portsmouth, NH Hubbell Inc

Principal Full Stack Engineer Liberty Mutual Holding Company Inc

Principal SAP PaPM Configuration Engineer Liberty Mutual Holding Company Inc

Principal Engineer, SCADA Engineering (BESS) Invenergy LLC

Mechanical Engineer - Sr. Principal - Facilities BAE Systems Plc

Electrical Engineer - Sr Principal - Facilities BAE Systems Plc

Field Engineer or Principal Field Engineer Northrop Grumman Corp

Principal Research Engineer AEC Data - Generative AI, East Coast United States Autodesk Inc

Engineer, Software Verint Systems, Inc.

Principal DDI and Automation Network Engineer FMR LLC

Principal Cybersecurity Cloud Engineer Ceridian HCM, Inc.

Principal Mechanical Engineer Mercury Systems Inc

RF Engineer Principal Mercury Systems Inc

Network Engineer, Principal Specialist, Pelham NH, ONSITE RTX Corp

Principal Systems Engineer RTX Corp

Principal Hardware Electrical Engineer Mercury Systems Inc

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