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Senior Software Developer Jobs in Peterborough, NH

BAE Systems

Eng Sr Prin II - SW

Merrimack, NH · On-site

$146K - $249K/yr

We're seeking highly motivated and skilled software engineers passionate about leveraging the power ... Join our team as a Senior Principal II Software Engineer in FAST Labs Engineering As a key member ...

BAE Systems

Eng Sr Prin - SW

Merrimack, NH · On-site

$132K - $226K/yr

Lead a software team through Agile software engineering design and development * Employ your expertise, decision skills, and independent judgment in technical areas * Lead Design Review activities to ...

BAE Systems

Eng Prin - SW

Merrimack, NH · On-site

$118K - $200K/yr

Work closely with senior engineers, customers, and other stakeholders to develop and implement software solutions that meet customer needs. * Developing software applications: Design, develop, test ...

BAE Systems

Eng Sr Prin - SW

Merrimack, NH · On-site

$130K - $221K/yr

Have some interest in leading a small team of software engineers? Come lead a team of engineers delivering new capabilities into space! We're looking for strong embedded software developers with a ...

BAE Systems

Eng Sr Prin III - SW

Merrimack, NH · On-site

$153K - $260K/yr

This role requires a strong understanding of software engineering principles, system design, and the ability to translate complex requirements into elegant and practical solutions. You will be a ...

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Senior Software Developer information

See Peterborough, NH salary details

$15

$63

$90

How much do senior software developer jobs pay per hour?

As of Aug 18, 2026, the average hourly pay for senior software developer in Peterborough, NH is $63.56, according to ZipRecruiter salary data. Most workers in this role earn between $53.94 and $71.30 per hour, depending on experience, location, and employer.

What is a senior software developer?

Senior Software Developers are experienced professionals who design, develop, and maintain complex software applications. They often lead development teams, mentor junior developers, and make critical architectural decisions. Their responsibilities include writing high-quality code, troubleshooting technical issues, and ensuring that software projects meet performance and security standards. With deep expertise in programming languages and software engineering principles, they play a key role in delivering successful technology solutions for organizations.

What does a senior software developer do?

As a Senior Software Developer, you’ll typically be responsible for leading complex development projects, designing technical solutions, and mentoring junior team members. Daily tasks often include writing and reviewing code, participating in architecture discussions, collaborating with cross-functional teams (such as QA, product management, and DevOps), and troubleshooting high-level technical issues. You may also be involved in setting coding standards, conducting code reviews, and helping to plan sprints or project roadmaps.

What skills and qualifications are needed to thrive as a senior software developer?

To thrive as a Senior Software Developer, you need deep expertise in programming languages, software architecture, and problem-solving, typically backed by a bachelor’s degree in computer science or a related field. Proficiency with development frameworks, version control systems like Git, and cloud platforms such as AWS or Azure is standard, and certifications in these areas can be beneficial. Leadership, strong communication, and mentoring abilities set standout candidates apart in this role. These skills ensure that complex projects are delivered efficiently, code quality is maintained, and junior team members are effectively guided for overall team success.

What is the difference between Senior Software Developer vs Software Engineer?

AspectSenior Software DeveloperSoftware Engineer
CredentialsBachelor's degree in CS or related field; experience often 5+ yearsBachelor's or higher in CS or related field; similar experience levels
Work EnvironmentCollaborates on complex projects, mentors juniors, leads technical effortsDesigns, develops, tests software; may work on specific modules or systems
Industry UsageCommonly used in tech companies, startups, and enterprise firmsWidely used across industries, often interchangeable with developer roles

The main difference is that Senior Software Developers typically have more experience, leadership responsibilities, and focus on complex project oversight, while Software Engineers may focus more on designing and implementing software solutions. Both roles require similar credentials and are integral in software development teams, but Senior Software Developers often take on mentorship and strategic tasks.

More about Senior Software Developer jobs

What are the most commonly searched types of Software Developer jobs in Peterborough, NH?

The most popular types of Software Developer jobs in Peterborough, NH are:

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For Senior Software Developer jobs in Peterborough, NH, the most frequently searched job titles are:

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Cities near Peterborough, NH with the most Senior Software Developer job openings:

Senior Software Developer jobs near you
Infographic showing various Senior Software Developer job openings in Peterborough, NH as of August 2026, with employment types broken down into 1% As Needed, 87% Full Time, 8% Part Time, and 4% Contract. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution, with an average salary of $132,205 per year, or $63.6 per hour.

BIOS Senior/Lead Software Engineer

Arista Networks

Nashua, NH • On-site

Full-time

Re-posted 12 days ago

Job description

Company Description
Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.
At Arista we value the diversity of thought and perspectives that each employee brings to the table. We believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.
Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.
Job Description
Who You'll Work With
Arista's BIOS team is responsible for developing and maintaining the CPU firmware, BIOS and Boot Loader software used in all Arista products.. This work includes bringing up new CPU boards, getting EOS to boot securely, efficiently and reliably. This work also involves designing and implementing new features in EOS to manage and secure the low level system initialization and booting subsystems, as well as keeping pace with the latest developments in the open source and proprietary BIOS development communities.
Arista BIOS software engineers are also responsible for low level software driving the CPU subsystems on all Arista products. You will evaluate new CPUs and work with CPU vendors and BIOS vendors to integrate their low level firmware into Arista products. You will work closely with hardware engineers to bring up, validate and test new CPUs in our hardware products.
Arista Software Engineering roles demand a strong and broad software engineering background. While the primary focus area for this role is firmware, BIOS and booting software, your work will cover all aspects of software development spanning the design and development of new features, debugging problems and fine tuning code for reliability and performance. You will own your projects from definition to deployment and customer interactions, and you will be responsible for the quality of everything you deliver.
What You'll Do
  • Design, develop, integrate and maintain the low-level CPU software in Arista products.
  • Develop automated tests using C, C++ and Python to validate your features.
  • Work with hardware engineers and vendors to qualify new CPUs and related components for use in Arista products.
  • Track ongoing developments in the Linux Kernel and identify features and functionality of interest to Arista for our products and for internal development needs.
  • Work with upstream open source BIOS communities to contribute features back to the mainline.
  • Review and contribute to functional and design specifications written by other engineers.
  • Work with Customer Support Engineers and customers to analyze, mitigate and fix problems in customer networks.
  • Work with the System Test Engineers to analyze problems found in their tests and provide fixes for those problems.
  • Provide technical leadership across features, projects and tools.
  • Mentor new and junior engineers to bring them up to speed in Arista's software development environment.

Qualifications
  • BS Computer Science/Electrical Engineering/Computer Engineering + 8 years experience, or MS Computer Science/Electrical Engineering/Computer Engineering + 6 years experience, or Ph.D. in Computer Science/Electrical Engineering/Computer Engineering + 3 years experience, or equivalent work experience
  • Expert knowledge of and extensive experience programming in C required. Knowledge of C++ and Python is desirable.
  • Experience designing and developing software in CPU firmware, BIOS and boot loader environments.
  • Experience bringing up new CPU boards.
  • Significant hands-on experience diagnosing problems, troubleshooting issues, and fixing bugs in low-level CPU firmware, BIOS and boot loader software.
  • Familiarity with Linux kernel architecture, design and implementation desirable
  • Understanding of IP networking architecture, design and principles desirable
  • Applied understanding of modern software engineering principles and practices
  • Strong problem solving and troubleshooting skills.
  • Strong software design and implementation skills.
  • Ability to work independently and in small teams.
  • Ability to communicate articulately, and document your designs and implementations clearly, and concisely.
  • Familiarity with and experience working with the x86 and ARM CPU architectures

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Additional Information
Arista Networks is an equal opportunity employer. Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law. All your information will be kept confidential according to EEO guidelines.

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