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Principal Full Stack Engineer Jobs (NOW HIRING)

Liberty Mutual

Principal Full Stack Engineer

Portsmouth, NH · On-site

$137K - $184K/yr

We are seeking a Principal Full Stack Engineer to join the Global Enterprise Services team within Global Finance Tech (GFT). In this role, you will serve as the technical leader for the Jet Setters ...

Lennar

Principal Full Stack Engineer

Miami, FL · On-site

Principal Full Stack Engineer We are Lennar Lennar is one of the nation's leading homebuilders, dedicated to making an impact and creating an extraordinary experience for their Homeowners ...

Eliassen Group

Principal Full Stack Engineer

Salem, NH · On-site

$74 - $78/hr

On-site Every Other Week onsite / 5 days in either Physical Location or Salem, NH Our client seeks a Principal Full Stack Engineer to design and deliver modern web applications and the CI/CD ...

Liberty Mutual

Principal Full Stack Engineer

Boston, MA · On-site

$120K - $225K/yr

We are seeking a Principal Full Stack Engineer to join the Global Enterprise Services team within Global Finance Tech (GFT). In this role, you will serve as the technical leader for the Jet Setters ...

Liberty Mutual

Principal Full Stack Engineer

Boston, MA · On-site

$146K - $196K/yr

We are seeking a Principal Full Stack Engineer to join the Global Enterprise Services team within Global Finance Tech (GFT). In this role, you will serve as the technical leader for the Jet Setters ...

Liberty Mutual

Principal Full Stack Engineer

Boston, MA · On-site

$146K - $196K/yr

We are seeking a Principal Full Stack Engineer to join the Global Enterprise Services team within Global Finance Tech (GFT). In this role, you will serve as the technical leader for the Jet Setters ...

Liberty Mutual

Principal Full Stack Engineer

Portsmouth, NH · On-site

$120K - $225K/yr

We are seeking a Principal Full Stack Engineer to join the Global Enterprise Services team within Global Finance Tech (GFT). In this role, you will serve as the technical leader for the Jet Setters ...

Lennar

Principal Full Stack Engineer

Miami, FL · On-site

Principal Full Stack Engineer We are Lennar Lennar is one of the nation's leading homebuilders, dedicated to making an impact and creating an extraordinary experience for their Homeowners ...

Releady

Principal Full Stack Engineer

Denver, CO · Remote

$85 - $100/hr

This is a hands-on, coding-heavy Principal role for a builder, not an enterprise architect. You ... The environment is startup-minded with CI/CD and full end-to-end ownership. Developers own setup ...

Eliassen Group

Principal Full Stack Engineer

Salem, NH · On-site

$74 - $78/hr

On-site Every Other Week onsite / 5 days in either Physical Location or Salem, NH Our client seeks a Principal Full Stack Engineer to design and deliver modern web applications and the CI/CD ...

Eliassen Group

Principal Full Stack Engineer

Westlake, TX · On-site

$60 - $85/hr

We are seeking a Principal Full Stack Engineer to lead design and development of scalable applications with a primary focus on front-end engineering in React and Angular, while contributing across ...

Soteria Reinsurance Ltd.

Principal Full Stack Engineer - AI Technology Note: Fidelity will not provide immigration sponsorship for this position. We are looking for an experienced Principal Full Stack Engineer to build ...

Soteria Reinsurance Ltd.

## Principal Full Stack EngineerApplylocations: Merrimack, NHtime type: Full timeposted on: Posted ... We at Fidelity Trade Management Engineering (TME) group are responsible for building and ...

GRUBBRR

Principal Full Stack Engineer

Boca Raton, FL · On-site

GRUBBRR is seeking a senior full-stack software engineer to help expand and build our next-generation suite of self-ordering applications. We strive to build Cloud-native, consumer-first, UX-friendly ...

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Principal Full Stack Engineer information

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$44.5K

$134.8K

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How much do principal full stack engineer jobs pay per year?

As of Sep 15, 2026, the average yearly pay for principal full stack engineer in the United States is $134,771.00, according to ZipRecruiter salary data. Most workers in this role earn between $111,000.00 and $158,000.00 per year, depending on experience, location, and employer.

What is a Principal Full Stack Engineer?

A Principal Full Stack Engineer is a highly experienced software engineer who leads the design, development, and implementation of both front-end and back-end systems. They possess deep technical expertise across multiple programming languages, frameworks, and architectures, and often set the technical direction for projects or teams. In addition to coding, they mentor other engineers, make architectural decisions, and collaborate with stakeholders to ensure high-quality, scalable solutions. Their role typically includes significant responsibility for system performance, security, and maintainability.

What does a Principal Full Stack Engineer do?

As a Principal Full Stack Engineer, you'll often split your time between developing complex features, setting technical direction, and guiding team members. While you remain actively involved in coding, a significant part of your role involves mentoring junior engineers, conducting code reviews, and collaborating closely with cross-functional teams such as product management and design. This balance allows you to influence both the technical quality and the professional growth of your team, while ensuring delivery of robust, scalable solutions.

What are the key skills and qualifications needed to thrive as a Principal Full Stack Engineer?

To thrive as a Principal Full Stack Engineer, you need deep expertise in both front-end and back-end development, a strong grasp of software architecture, and a proven track record leading complex projects—typically supported by a relevant degree or equivalent experience. Mastery of multiple programming languages (such as JavaScript/TypeScript, Python, or Java), cloud platforms, CI/CD pipelines, and frameworks like React or Node.js is usually required, along with familiarity with DevOps practices. Exceptional communication, mentorship, and problem-solving abilities help you guide teams and collaborate across departments. These skills are essential to design scalable systems, drive technical excellence, and ensure team alignment on strategic goals.
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Infographic showing various Principal Full Stack Engineer job openings in the United States as of September 2026, with employment types broken down into 1% Internship, 89% Full Time, 7% Part Time, and 3% Contract. Highlights an 84% Physical, 5% Hybrid, and 11% Remote job distribution, with an average salary of $134,771 per year, or $64.8 per hour.

Principal Full Stack Engineer

Portsmouth, NH • On-site

Liberty Mutual
Insurance Services • 10K+ employees
Learn more about Liberty Mutualexternal

$137K - $184K/yr

Full-time

Posted 7 days ago

Liberty Mutual rating

8.5

Company rating: 8.5 out of 10

Based on 163 frontline employees who took The Breakroom Quiz

Job description

Description
We deliver our customers peace of mind every day by helping them protect what they value most. Our passion for placing the customer at the center of everything we do is driving a transformational shift at Liberty Mutual. Operating as a tech startup within a Fortune 100 company, we are leading a digital disruption that will redefine how people experience insurance.
At Liberty, you'll thrive in a hybrid setting that fosters in-person collaboration, innovation and growth. This approach optimizes both remote and in-person interactions, enabling you to connect and ideate with your team and deepen valuable relationships across the company, while still enjoying the flexibility of remote work for focused tasks and projects.
This role has a hybrid work schedule (2 days onsite) and we are considering candidates based in Portsmouth, NH, and Boston, MA.
You must be authorized to work in the United States without employer sponsorship now or in the future. We will not sponsor employment visas. Candidates who will require future sponsorship, including candidates on CPT/OPT/STEMOPT who will require future sponsorship, are not eligible to apply.
Job Introduction:
We are seeking a Principal Full Stack Engineer to join the Global Enterprise Services team within Global Finance Tech (GFT). In this role, you will serve as the technical leader for the Jet Setters squad, setting the technical direction for and driving the architecture, design, and delivery of back-end and full-stack applications. The Jet Setters squad owns a portfolio of 22 GFT products, including the Reservation System, Contracts Portal, Non-Employee Portal, Corporate Aviation Flight Approvals and Business Impact Analysis (BIA).
As the most senior engineer on the squad, you will partner with product owners, business partners, architects and engineering leadership to shape the long-term technical roadmap and deliver secure, reliable, and scalable solutions including the strategic integration of AI-powered capabilities that enhance user experiences and operational efficiency. You will act as a force multiplier: mentoring engineers, elevating engineering standards, and influencing technical decisions.
About the job:
  • Set the technical vision and architecture strategy for the squad's portfolio, balancing immediate delivery needs with long term scalability and maintainability.
  • Lead the design and development of complex, high impact applications and shared platform capabilities.
  • Drive architectural decisions and establish patterns, frameworks, and reusable components adopted across teams.
  • Provide technical leadership and hands-on mentorship to engineers, fostering growth and raising the bar for engineering quality.
  • Establish and champion engineering guidelines, standards, and best practices across the organization.
  • Review code and technical designs, providing actionable feedback and ensuring adherence to architectural and quality standards.
  • Own and evolved automated testing, CI/CD, and observability strategies to ensure reliability and operational excellence.
  • Lead impact analyses and technical solutioning for the most complex, systemic, and high-risk changes.
  • Develop and recommend technical alternatives for ambiguous, large scale, or systemic problems.
  • Guide production support strategy, including complex incident triage, root cause analysis, and defect resolution.
  • Author and steward architecture documentation, technical specifications, and production support artifacts.
  • Define and lead the strategy for integrating AI-powered features and capabilities across existing and new product lines.
  • Partner with product and business leaders to translate business objectives into technical strategy and influence prioritization and roadmaps.
  • Collaborate with your team's solutions engineer and architects on enterprise-wide technical initiatives and governance.
Qualifications
  • Bachelor's degree in technical or business discipline.
  • Minimum 8+ years of Full Stack Engineering experience, including demonstrated experience as a technical lead or principal engineer.
  • Deep expertise in applying object-oriented design patterns, architectural patterns, and distributed systems principles.
  • Advanced proficiency with TypeScript, React, Node.js, AWS Lambda, AWS S3, SQL, Spring Boot, GitHub Actions.
  • Experience with GitHub Copilot or similar products such as Claude Code, including driving adoption of AI-assisted development practices across teams.
  • Proven track record architecting, delivering, and supporting multiple complex, large scale production applications.
  • Expert knowledge of IT concepts, strategies, and methodologies, with the ability to set technical direction across teams.
  • Demonstrated experience leading engineering teams technically, mentoring engineers, and driving adoption of best practices.
  • Deep experience with Agile methodologies (e.g., Scrum) and scaling engineering practices.
  • Expertise designing and optimizing CI/CD pipelines and tooling, and defining testing frameworks, strategies, and best practices.
  • Proven ability to influence stakeholders and drive alignment across engineering, product, and business partners.
  • Exceptional analytical, problem-solving, and decision-making skills, with strong ownership and initiative.
  • Excellent oral and written communication skills, including the ability to communicate complex technical concepts to technical and nontechnical audiences.
  • Team-oriented leader, with strong collaboration, prioritization, and adaptability skills.
Nice to Have Qualifications: AI & Emerging Technologies
  • Understanding of AI/ML concepts and how they apply to software product development at scale.
  • Experience architecting and integrating Large Language Model (LLM) APIs (e.g., OpenAI, Azure OpenAI, AWS Bedrock) into production applications.
  • Hands-on experience with Retrieval-Augmented Generation (RAG) patterns, including vector databases and embedding models.
  • Experience designing solutions with AI orchestration frameworks.
  • Expertise in prompt engineering techniques and best practices for building reliable, production-grade AI-driven features.
  • Understanding of responsible AI principles, including bias awareness, explainability, and data privacy considerations.
  • Experience designing, building, or consuming AI-powered APIs and microservices in a cloud-native environment (AWS preferred).
About Us
Pay Philosophy: The typical starting salary range for this role is determined by a number of factors including skills, experience, education, certifications and location. The full salary range for this role reflects the competitive labor market value for all employees in these positions across the national market and provides an opportunity to progress as employees grow and develop within the role. Some roles at Liberty Mutual have a corresponding compensation plan which may include commission and/or bonus earnings at rates that vary based on multiple factors set forth in the compensation plan for the role.
At Liberty Mutual, our goal is to create a workplace where everyone feels valued, supported, and can thrive. We build an environment that welcomes a wide range of perspectives and experiences, with inclusion embedded in every aspect of our culture and reflected in everyday interactions. This comes to life through comprehensive benefits, workplace flexibility, professional development opportunities, and a host of opportunities provided through our Employee Resource Groups. Each employee plays a role in creating our inclusive culture, which supports every individual to do their best work. Together, we cultivate a community where everyone can make a meaningful impact for our business, our customers, and the communities we serve.
We value your hard work, integrity and commitment to make things better, and we put people first by offering you benefits that support your life and well-being. To learn more about our benefit offerings please visit: https://LMI.co/Benefits
Liberty Mutual is an equal opportunity employer. We will not tolerate discrimination on the basis of race, color, national origin, sex, sexual orientation, gender identity, religion, age, disability, veteran's status, pregnancy, genetic information or on any basis prohibited by federal, state or local law.
Fair Chance Notices
  • California
  • Los Angeles Incorporated
  • Los Angeles Unincorporated
  • Philadelphia
  • San Francisco

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About Liberty Mutual

Sourced by ZipRecruiter

Since 1912, we've grown into the fifth largest global property and casualty insurer based on 2022 gross written premium. We also rank 86 on the Fortune 100 list of largest corporations in the US based on 2022 revenue. ​At Liberty Mutual Insurance we work hard every day to support our customers and our people, so they can protect their families, build their businesses and invest in their futures. We are headquartered in Boston, but our people, our customers and our reach span the globe. So to better serve our global customers and employees, we are organized into three business units.

Industry

Insurance services

Company size

10,000+ Employees

Headquarters location

Boston, MA, US

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