4,294 Results for

Software Design Engineer Jobs in Nashua, NH

Jobs

Boston, MA

$65–$80 / hour

Developers at this level are building greater independence, taking ownership of small to medium-sized work items, and strengthening their core engineering skills across multiple application layers, including user interfaces, services, APIs, and data. Our teams include professionals across software engineering, product development, clinical informatics, research, and healthcare technology who share a commitment to reducing complexity and improving outcomes for patients and providers.

2 days ago

Cambridge, Massachusetts

Contractor

Excellent development and troubleshooting skills on embedded targets ¿ Excellent knowledge of OS coding techniques, interfaces, hardware subsystems and driver development ¿ Development experience with device drivers, board support package, boot code and knowledge of embedded system buses and protocols (e.g. GCC, LLVM), static analysis tools, dynamic analysis, and QEMU based development are preferred ¿ Knowledge and experience with software configuration management tools, defect tracking tools, and peer review processes.

30+ days ago

Wilmington, MA

$135,000–$250,500 / year

L3Harris Space and Mission Systems is seeking a Lead, Embedded Software Engineer for our Wilmington, MA location to join a talented team of experts developing Embedded Flight Software for space-based imaging payloads. Experience with embedded command and control of mechanisms (e.g., shutters, motors, gimbals), embedded controllers (e.g., PIC, STM, TMS), serial communications (e.g., CAN, TCP/IP, RS422), and distributed messaging (TCP/UDP).

5 days ago

Wilmington, MA

$97,000–$180,000 / year

L3Harris Space and Airborne Systems is seeking an Embedded Software Integration Engineer for our Wilmington, MA location to join a team of experts developing Embedded Flight Software for space-based imaging payloads. Bachelor’s degree in Computer Engineering, Computer Science, or related field with 4+ years of relevant experience; OR Graduate Degree with 2+ years of relevant experience; OR 8+ years of relevant experience in lieu of a degree.

5 days ago

Wilmington, MA

$135,000–$250,500 / year

The ideal candidate has a strong background in space domain, including embedded and real-time software, RTOS environments such as VxWorks, and development of EGSE and test systems for optical payload integration and test. Bachelor’s degree in Computer Engineering, Computer Science, or related field with 9+ years of relevant experience; OR Graduate Degree with 7+ years of relevant experience; OR 13+ years of relevant experience in lieu of a degree.

5 days ago

Somerville, MA

You will work closely with Whelix’s technical team to support the development of robotic systems that manipulate human-centric lab tools, translate workflows into automated systems, and help advance the platform from pilot stage toward commercial readiness. This role is ideal for an early-career robotics engineer, recent graduate, or advanced student with hands-on robotics experience through internships, research, capstone projects, or early professional work.

1 day ago

Boston, MA

As a seed-stage B2B startup, we’re on a mission to help teams accelerate discovery, validate concepts faster and scale impact across the organization, and we believe customer obsession is our unfair advantage. This role is ideal for someone who enjoys engaging directly with customers, bringing structure to ambiguity, and translating technical capabilities into practical, business‑aligned solutions.

11 days ago

Boston, MA

$216,000–$324,000 / year

In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. Platform Upgrades and Rollouts: Oversee and assist with the planning and seamless rollout of major software releases and updates, managing the entire lifecycle from design to deployment in production environments including significant individual contributions.

19 days ago

Boston, MA

$216,000–$324,000 / year

As a Senior Lead Software Engineer on Amplify, you will: Independently own and drive high-impact objectives that span multiple Amplify teams and align with company priorities, defining the technical roadmap that ensures our internal applications, APIs, data and event pipelines, and AI-powered workflows can scale with Klaviyo and continue delivering measurable business outcomes. Independently lead the end-to-end lifecycle of large, multi-team initiatives with clear technical direction, architectural leadership, and active workstream curation, from discovery and design through implementation, rollout, and long-term ownership of complex programs that span internal customers across the company.

8 days ago

Boston, MA

$148,000–$222,000 / year

Partnering closely with product managers, data scientists, and other platform teams, you’ll help define scope, translate complex data and UX problems into practical implementations, and build intuitive workflows that give customers confidence in their audiences. In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.

19 days ago

Boston, MA

$148,000–$222,000 / year

In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. The Customer Agent team is building one of Klaviyo’s most ambitious and strategic product areas: an extensible AI platform that enables brands to deliver personalized, autonomous customer experiences across channels like chat, email, SMS, and beyond.

19 days ago

Boston, MA

$148,000–$222,000 / year

You will define the architectural approach and technical strategy for your area of responsibility, anticipating scalability and reliability needs, including leveraging AI agents in our work and delivery, ensuring the solution is robust, scalable, and adheres to best practices for security, performance, and maintainability. In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.

19 days ago

Boston, MA

$148,000–$222,000 / year

In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. We have a big opportunity to build state-of-the-art AI and machine learning technologies at Klaviyo to power our products and develop AI agents that can automatically create and execute marketing or customer experiences, strategies, and campaigns for any business.

8 days ago

Boston, MA

$116,000–$174,000 / year

In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility. We love tackling tough engineering problems and look for Engineers who specialize in certain areas but are passionate about building, owning & scaling features end to end from scratch and breaking through any obstacle or technical challenge in their way.

6 days ago

Boston, MA

$116,000–$174,000 / year

Build and maintain shared SDKs and contracts that let internal teams adopt IAM services quickly (OAuth, machine auth, org-scoped authZ), making “secure by default” the simplest option for new surfaces and agents. In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.

6 days ago

Boston, MA

Remote

You believe customers are more than a number: Samsara engineers enjoy a rare closeness to the end user and you will have the opportunity to participate in customer interviews, collaborate with customer success and product managers, and use metrics to ensure our work is translating into better customer outcomes. • You want to impact the industries that run our world: The software, firmware, and hardware you build will result in real-world impact—helping to keep the lights on, get food into grocery stores, and most importantly, ensure workers return home safely.

14 days ago

Boston, MA

$244,000–$366,000 / year

AI‑assisted scale engineering: AI‑driven anomaly detection reduces alert noise while improving signal; generative load testing and copilot runbooks are used in release/readiness checks for the top critical services; time‑to‑isolate regressions drops 20–30%. In addition to base salary, our total compensation package may include participation in the company’s annual cash bonus plan, variable compensation (OTE) for sales and customer success roles, equity, sign-on payments, and a comprehensive range of health, welfare, and wellbeing benefits based on eligibility.

19 days ago

Andover, MA

$65–$68 / hour
Contractor

p>* While an hourly range is posted for this position, an eventual hourly rate is determined by a comprehensive salary analysis which considers multiple factors including but not limited to: job-related knowledge, skills and qualifications, education and experience as compared to others in the organization doing substantially similar work, if applicable, and market and business considerations. Benefits offered are in accordance with applicable federal, state, and local laws and subject to change at TCM's discretion.

4 days ago

Boston, MA

As a Software Engineer focused on building systems for Detection’s Model Platform, you will be responsible for making feature development at Abnormal a fast, responsive, stable, and confident experience for our ML and Data Science team. The Detection Division is focused on building the world’s most advanced technology for identifying and stopping email and cloud-based attacks that were previously undetectable and help make the world a safer place.

9 days ago

Boston, MA

Design and implement core components of the SMTP relay harness, including Mail Transfer Agent (MTA) infrastructure, scalability, IP management, encryption, and DMARC support, working from conception through production operation. • Contribute to technical design discussions on how the relay integrates with existing inline products (outbound DLP, behavioral outbound, misdirected email), helping define the architecture of the broader Mail Flow platform.

9 days ago

Boston, MA

The position is well suited for an engineer who enjoys working with complex systems, troubleshooting production issues, and contributing to the continued evolution and sustainability of the platform. This role focuses on supporting, enhancing, and progressively modernizing enterprise and legacy applications using C#, NET Framework, and SQL Server.

11 days ago

Boston, MA

Distributed systems expert – you bring deep experience designing and operating large-scale distributed systems, and have partnered with security teams to build secure-by-default solutions. Were looking for a distributed systems expert who has worked closely with security teams — someone who can drive Product Security at scale and translate that into clear, executable technical roadmaps.

6 days ago

Burlington, Massachusetts

$100,000–$140,000 / year

Collaborate with the Manager of Controls Engineering to design and implement advanced control systems for robotic manipulators and electromechanical systems. Responsibilities include motion control and servo tuning, dynamic modeling, simulation in MATLAB, and real-time software implementation.

30+ days ago

Lawrence, MA

Applying next-gen technology, high-density storage and machine learning to solve today's complex distribution challenges, Symbotic enables companies to move goods with unmatched speed, agility, accuracy and efficiency. Cross-Functional Collaboration: Work closely with electrical, software, controls, manufacturing, and quality engineering teams to ensure seamless integration and product success.  .

30+ days ago

Hudson, NH

Remote

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. Acting as a senior engineering leader who actively innovates, experiments, and evaluates emerging technologies, including cloud‑native patterns, platform modernization, and improved approaches to building APIs and services at scale.

2 days ago

Woburn, Massachusetts

$75–$90 / hour
Contractor

Role can be Hybrid, TBD The Systems Engineer should have experience architecting systems, working across the Systems Engineering Lifecycle, and in Digital Engineering/Model-Based Systems Engineering (MBSE) achieving architectural integrity and traceability through requirements analysis, system and software development and production system deployment. The ideal candidate will be well-versed in Systems Engineering techniques, Modeling and Simulation, and Digital Engineering/MBSE and be excited about opportunities to mentor more junior staff and help foster growth of subject matter expertise across the organization.

30+ days ago

Billerica, Massachusetts

$95,000–$130,000 / year

Job Summary: This role is responsible for translating customer technical requirements into product specifications, designing and validating new features, and developing custom mechanical components. It also includes maintaining technical documentation, providing on-site support, and collaborating cross-functionally to ensure successful product implementation.

3 days ago

Hudson, New Hampshire

Contractor

You will collaborate with cross-functional teams, including design engineers, production personnel, and quality assurance, to optimize manufacturing operations and drive continuous improvement initiatives. As a Manufacturing Engineer, your primary responsibility will be to develop and improve manufacturing processes and systems to ensure the efficient and cost-effective production of defense and aerospace products.

30+ days ago

Hudson, New Hampshire

Contractor

2 days ago

Burlington, MA

$105,000–$160,000

Create, oversee, and maintain detailed process SOP documentation, including work instructions, process flow diagrams, and technical reports, using tools like Microsoft Office Suite and ERP systems (e.g., Oracle). We deliver high-performance products that meet the rigorous demands of quality, durability, and precision required for next-generation turbine engines while helping reduce greenhouse gas emissions.

2 days ago

Hudson, New Hampshire

Contractor

Collaboration: Collaborate with cross-functional teams, including electrical engineers, mechanical engineers, software engineers, and project managers, to ensure successful integration of the Antennas . *Testing and Measurement Equipment: - Experience with Antenna/RF testing and measurement equipment, such as network analyzers, spectrum analyzers, signal generators, and oscilloscopes.

2 days ago

Exeter, NH

Full time

The Test Engineer is responsible for the design, development, programming, implementation, and maintenance of automated test equipment and test fixtures used in the testing of power supplies and related electronic products. This role works closely with design and manufacturing teams to develop test procedures, create automated test programs, and ensure product quality through effective testing processes.

23 days ago

Woburn, Massachusetts

Contractor

Client is focused on delivering National Defense capabilities by driving mission-focused strategies to develop advanced technology systems enabling enduring products and solutions focused on achieving the customer vision. Applicants are expected to be self-motivated, detail oriented and have a demonstrated ability to effectively communicate with all levels of management and individual contributors on the program team through strong written and verbal communication skills.

30+ days ago

Cambridge

Contractor

Time domain simulations, covariance-based methods, and Monte Carlo dispersed analysis will be used to assess and tune system performance and to document analysis results. The analysis will include assessment of control, navigation, and guidance system performance, verification of algorithms and algorithm requirements, and analysis of flight dynamics and trajectory dispersions.

30+ days ago

Hudson, New Hampshire

$45–$58 / hour
Contractor

This role will participate and/or lead failure analysis in manufacturing and for field failures, develop troubleshooting & repair schemes, develop manufacturing process controls and documentation, interface with manufacturing and quality personnel to train and transfer processes & knowledge for successful volume production launches, and engage with suppliers as needed to drive improvement and implement process controls. This is a hands-on role that works with a team of quality engineers, technicians and inspectors that are engaged through the entire life cycle of product, starting during development, continuing with transitioning of product to manufacturing, and then supporting the continuous manufacture of product.

30+ days ago

Bedford, MA

Full time

A successful candidate has strong experience with Azure Cloud services, is self-driven, enjoys learning new technologies, and is willing to stretch themselves to become a stronger engineer and mentor others around them to do the same. Developing effective cloud infrastructure, enforcing good architectural principles, providing technical oversight, and ensuring security best practices are implemented and followed.

30+ days ago

Amesbury, Massachusetts

$85,000–$120,000 / year

This role collaborates closely with Sales, Engineering, Operations, and Quality to develop and deliver engineered solutions that meet customer requirements while driving revenue growth, customer satisfaction, and long-term business relationships. The Sales Engineer serves as the technical liaison between customers and internal teams, providing engineering expertise throughout the sales process.

3 days ago

Burlington, Massachusetts

$50–$58 / hour

This role is ideal for an engineer who enjoys technical problem solving, proposal development, and cross functional collaboration in a fast paced environment. Create production level BOMs to support purchasing, supplier RFQs, and material procurement activities.

3 days ago

Bedford, MA

$123,639–$210,000 / year

Essential Job Functions: Assist in the development of security documentation including System Security Management Plans, Program Protection Plans, Security Risk Analyses, OPSEC Plans, and other required system security engineering artifacts. The Electronic Systems System (ESS) Division aka Force Protection Division's mission responsibility is to manage and execute the modernization, design, development, testing, fielding, and sustainment of the various software and hardware within the ESS Portfolio.

4 days ago

Bedford, MA

$90,220–$185,000 / year

Assist in the development of security documentation including System Security Management Plans, Program Protection Plans, Security Risk Analyses, OPSEC Plans, and other required system security engineering artifacts. The Electronic Systems System (ESS) Division aka Force Protection Division's mission responsibility is to manage and execute the modernization, design, development, testing, fielding, and sustainment of the various software and hardware within the ESS Portfolio.

3 days ago

Boston, MA

Remote

$123,136–$202,488 / year

This is a great opportunity to join a fast-paced agile team that works with the latest technologies and patterns, asynchronous programming, and MVVM to design and develop next-gen Esri software. Design, develop, and build software components, frameworks and SDKs for other engineering teams and external developers consuming our API.

25 days ago

Billerica, MA

$75–$85 / hour
Contractor

Desired Skills (Nice to Have)Experience with project leadership, project cost and schedule management, i.e. EVMS, MS ProjectDoW (DoD) project development life cycle processes. The individual comes up to speed quickly, has an impact on our projects developing test stations/fixtures/automated test software, has familiarity with a process heavy work environment.

10 days ago

Billerica, MA

$80–$95 / hour
Contractor

9 days ago

Devens, MA

$52.14–$55.30 / hour

Design, execute, manage, and implement QC instrument / software qualification documents such as (but not limited to): User Requirement Specification (URS), Design Qualification (DQ), validation plans, equipment IOQ protocols, software test scripts, configuration specifications, risk assessments, qualification summary reports. Quality management system experience including: document control / management, change controls, investigations, deviations, electronic validation databases, asset management database.

10 days ago

Bedford, MA

$90,220–$170,000 / year

Conduct systems architectural analyses to include system design/design feasibility and state-of-the-art assessment to Produce architectures, document planned and existing systems, determine deficiencies, develop alternatives, recommend solutions, and support development of a plan to implement the chosen solution per acquisition and sustainment system engineering processes. Analysis of Alternatives (AoA), Systems Engineering Plan (SEP)…), systems review and analysis with written reporting, briefing, and artifact development as required for all of the technical specialty areas defined in this section; and the planning and execution of all necessary technical reviews, assessments, and interchange meetings (e.g.

2 days ago

Boston, MA

$102,000–$200,000

Prior experience leading or managing engineering teams, preferably small to mid-sized teams of 5–10 engineers, with demonstrated ability to mentor, guide, and deliver through others while remaining technically hands-on. Ability to set technical direction, influence architecture decisions, manage delivery priorities, and communicate effectively with senior stakeholders, business partners, architects, and engineering teams.

2 days ago

Bedford, MA

$73,160–$115,000 / year

The C2ISR Division provides worldwide life cycle support across the spectrum of the C2ISR capabilities based enterprise; including supply, distribution, materiel management, acquisition, system engineering and maintenance, financial planning and budgeting, security, flight test, and contracting functions. EPASS support is required to execute the major GNS programs in support of the C2ISR Division, to include: AF DCGS Network Infrastructure Transformation (NIT), Extended Tether Program (ETP), and Global Command and Control System – Air Force Infrastructure (GCCS-AF (I)).

9 days ago

Andover, MA

Expertise with RF subsystem and hardware including antennas, transmitters, receivers, microwave components, low noise amplifiers, high power amplifiers, advanced electronic modules, amplifiers, mixers, switches, frequency generation circuits and/or frequency conversion circuits is desired. In this role, the Staff RF Engineer will support the development and production of complex multi-function modules used in challenging high reliability applications in all phases of the product life cycle.

2 days ago

Newton, MA

$120,000–$180,000 / year

Recently, Global Infrastructure Solutions Inc. (GISI), the parent company of The LiRo Group and Hill International, Inc. consolidated a portion of the highly experienced staff of both LiRo and Hill in the Northeast to create a larger, more efficient, and cost-effective team to serve clients. We work hard to build a corporate culture that empowers all our employees to freely share their ideas, know their presence, and contributions are truly valued, fostering a climate where our employees are enabled to maximize their full potential.

2 days ago

Bedford, MA

$142,188–$225,000 / year

The Air Force Program Execution Office for Intelligence, Surveillance, Reconnaissance and Special Operations (PEO ISR SOF) has the collective Air Force Materiel Command (AFMC) mission responsibility to manage and execute the modernization, development, testing, production, fielding, and sustainment of the ISR SOF portfolio, which includes over 200 programs for the United States Air Force (USAF) and foreign allies. Lead development and review of system security documentation including System Security Management Plans, Program Protection Plans, Security Risk Analyses, OPSEC Plans, and security CONOPS in accordance with DoDI 5000.02,

9 days ago

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Software Design Engineer Jobs in Nashua, NH

Software Development Engineer Jobot

Embedded Software Engineer (Avionics) GCR Professional Services

Lead, Embedded Software Engineer (Optical Space Systems) : Sign-on bonus ($30K max) L3Harris Technologies

Specialist, Embedded Software Engineer (Optical Payload Integration) : Sign-on bonus ($15K max) L3Harris Technologies

Lead, IPTL Software Engineer (Optical Space Systems) : Sign-on bonus ($30K max) L3Harris Technologies

Robotics Software Engineer - Boston Braintrust

Forward Deployed Software Engineer Growth Signals

Senior Lead Software Engineer - Developer Infrastructure Klaviyo

Senior Lead AI Software Engineer Klaviyo

Senior Software Engineer - Profiles, Lists and Segments Klaviyo

Senior Software Engineer - Customer Agent Klaviyo

Senior Software Engineer - Growth Klaviyo

Senior Software Engineer, Agent Platform Klaviyo

Software Engineer II, Data Automation Klaviyo

Software Engineer II - Identity & Access Management Klaviyo

Senior Software Engineer - Route Execution Samsara

Principal Software Engineer, Enterprise Scalability Klaviyo

Java Software Engineer The Computer Merchant, Ltd

Software Engineer II - Model Platform Abnormal

Software Engineer II - Inline Mailflow Abnormal

Software Engineer (C# .NET Framework/SQL Server) Sarnova

Staff Software Engineer, Security & Privacy Abnormal

Robotics/Controls Engineer GCR Professional Services

Senior Mechanical Engineer Symbotic

Director, Software Engineering (UI) Fidelity Investments

Model-Based Systems Engineer (MBSE) GCR Professional Services

Application Engineer GCR Professional Services

Manufacturing Engineer III (NH) GCR Professional Services

Manufacturing Engineer III| (NH) GCR Professional Services

Senior Manufacturing Engineer Poly6

RF Engineer III (NH) - Security Clearance GCR Professional Services

Test Engineer Continental Resources

Principal Radar Systems Engineer GCR Professional Services

GNC SYSTEMS ANALYST ENGINEER GCR Professional Services

Quality Engineer III (NH) GCR Professional Services

MS Azure Engineer Continental Resources

Sales Engineer GCR Professional Services

Mechanical Proposal & Cost Engineer GCR Professional Services

Cybersecurity Engineer, Senior - Secret DCS Corporation

Cybersecurity Engineer, Journeyman - Secret DCS Corporation

Sr. Software Developer - C#/WPF for UI/UX Development Esri

STS Senior Test Development Engineer P3 Butler America Aerospace

STS Senior Test Development Engineer P2 Butler America Aerospace

Validation Engineer ECLARO

General/Interdisciplinary Engineer, Senior - Secret DCS Corporation

Senior Vice President, Full-Stack Engineer BNY

Systems Engineer, Junior - TS DCS Corporation

RF Engineer PlanIT Group

Senior Mechanical Engineer The LiRo Group

Cybersecurity Engineer, Principal DCS Corporation

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