Princ Full Stack Engineer

Liberty Mutual Fire Insurance Co.; Boston (MA); Hybrid; USD 120,000 - 225,000; Full time

Benefits offered by this job

Referral bonus

Job summary

Liberty Mutual Fire Insurance Co. is seeking a Principal Full Stack Engineer in a hybrid role (2 onsite days) based in Boston, MA or Portsmouth, NH. You will design and build enterprise applications in the cloud, mentor teammates and set coding standards across the platform.

The ideal candidate has 8+ years of full‑stack experience with Java, Spring Boot, React, AWS and REST APIs, and can lead cross‑functional delivery while ensuring performance and reliability.

Qualifications

• Bachelor's Degree in technical discipline or equivalent experience.
• 8+ years of full stack development with Java, React, NodeJS and AWS.
• Experience with Java 8+ / 11 / 17, Spring Boot, RESTful services, and databases.

Responsibilities

• Lead the design, development and integration of cross‑platform enterprise applications.
• Mentor the technical design, development and best practices for the team.
• Define technology standards and architect large‑scale web solutions.
• Work with cross‑functional teams and vendors to deliver projects.
• Hands-on coding with emphasis on modernization, site reliability and API layers.

Skills

Full stack development

React

Node.js

TypeScript/JavaScript

Java 8+/Spring Boot

REST APIs

Docker

AWS

SQL/Oracle/MySQL

Git/GitHub Actions

Multithreading/Performance

Education

Bachelor's Degree in computer science or equivalent

Tools

Spring Boot

Hibernate/JPA

REST/JSON/OpenAPI

CI/CD pipelines

Job description

Princ Full Stack Engineer

Job Locations US-MA-Boston | US-NH-Portsmouth

ID 2026-75571

Position Type Full-Time

Job Grade 18

Department 0055-04407 CF - Global Finance Technology

Market Corporate Center

Referral Bonus Amount 3000

Minimum Salary USD $120,000.00/Yr.

Maximum Salary USD $225,000.00/Yr.

Typical Starting Salary $142,800 - $201,300

Recruiter Charu Chawan

Referral Bonus Eligible? Yes

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.

Hiring Manager - Matthew Empey

Job Introduction:

The Global Finance Technology organization is looking to hire a Principal Full Stack Engineer. The candidate will be part of a talented agile team and will have the opportunity to work on cutting‑edge projects. We are seeking a driven and creative individual who is able to think strategically and collaborate effectively with cross‑functional teams.

Candidate will be responsible for technical design and development of cross-functional, multi‑platform applications that solve complex business problems. 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. You will interact with business and tech teams and focus on solution design, development, debugging and performance tuning.

About the job:

• Develop modern enterprise-level applications in the cloud.
• Lead & mentor the technical design, development, and integration of solutions using existing and emerging technology platforms.
• Influence and coach the broader technical team to help push best practices and understanding of modern design and development practices.
• Define technology standards, guidelines, and coding practices for the platform.
• Create architectures for large-scale web-based applications and technology solutions, by collaborating with other architects/technical leads.
• Become a subject matter expert and gain a deep understanding of the Platform Application and Infrastructure framework.
• Work closely with cross-functional teams and applicable vendors.
• Hands‑on development with a focus on application modernization, site reliability, containerization, and building appropriate API layers in Java Spring Boot, Node.js, and other distributed technologies.
• Participate in critical production issues, driving teams towards incident & problem ticket closure.
• Participate in fit/gap analysis of requirements, help manage user expectations on feature deliverables, provide tactical and strategic options to address issues and technical debt, and develop code to modern standards.

Qualifications

• Bachelor's Degree in technical discipline, preferably computer science or software development or equivalent experience.
• Minimum 8 + years of Full Stack Development experience primarily using the following technologies in addition to Java: React, MobX, Semantic UI, MySQL, Oracle, Git, and Docker.
• Experience with AWS services for IVR, e.g., Lex and Lambda, plus Amazon Connect.
• Experience with API development using NodeJS and TypeScript/JavaScript
• Experience with application observability tools, e.g., DataDog.
• Extensive professional experience developing applications using Java (Java 8+ / 11 / 17).
• Strong proficiency in object-oriented design, data structures, and design patterns.
• Hands‑on experience with Spring / Spring Boot, including RESTful services and dependency injection.
• Experience building and consuming APIs (REST, JSON, OpenAPI).
• Solid understanding of multithreaded programming, concurrency, and performance tuning.
• Experience with relational databases (Oracle, PostgreSQL, MySQL) and ORM frameworks such as Hibernate/JPA.
• Familiarity with CI/CD pipelines, automated testing, and version control (Git) and GitHub Actions.
• Strong troubleshooting skills with the ability to debug and resolve complex issues in production systems.
• A design thinking, test-driven development, and shift-left mindset.
• Ability to mentor others and raise a team's technical capabilities.
• Hands‑on involvement with layered systems architectures, designs and shared software concepts.
• Experience working in an agile environment.
• Excellent negotiation, facilitation and consensus-building capabilities.
• Strong leadership, coaching and mentoring skills.
• Proven ability to speak to varying levels of the organization and successfully collaborate across the organization.
• 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.
• Openness and adaptability to respond to fast-moving circumstances.
• Excellent oral and written communication skills.Aptitude for working in teams.