Hybrid Principal Full-Stack Engineer: Cloud & APIs Leader

Liberty Mutual Insurance; Portsmouth (NH); Hybrid; USD 140,000 - 170,000; Full time

Job summary

Liberty Mutual Insurance in Portsmouth, NH is seeking a Principal Full Stack Engineer to join a hybrid team delivering cloud-native, enterprise-level applications. You will design, develop, and optimize multi-platform solutions, mentor teammates, and collaborate with cross-functional groups to drive engineering excellence.

Role emphasizes hands-on coding with Java Spring Boot, Node.js, API design, and modern architectures while fostering a culture of continuous improvement and reliable delivery.

Qualifications

• Bachelor's degree in a technical discipline or equivalent experience.
• 8+ years of full stack development experience with Java and frontend stacks.
• Experience with cloud native architecture and modern API design.

Responsibilities

• Develop modern cloud-based enterprise applications.
• Lead technical design, development, and integration of solutions.
• Coach the broader team on best practices and modern design.
• Define technology standards, guidelines, and coding practices.
• Architect large-scale web applications with cross-functional teams.
• Hands-on modernization, site reliability, and API layers (Java Spring Boot, Node.js).
• Collaborate with vendors and cross-functional teams to deliver solutions.
• Address production issues and drive incident resolution.

Skills

Full stack development

Mentoring & leadership

Agile methodology

Problem solving

Communication

Education

Bachelor's Degree in computer science or software development or equivalent

Tools

React

MobX

Semantic UI

MySQL

Oracle

Git

Docker

AWS Lex/Lambda

Amazon Connect

NodeJS

TypeScript/JavaScript

DataDog

Java (8+/11/17)

Spring/Spring Boot

REST APIs

OpenAPI

Hibernate/JPA

CI/CD

GitHub Actions

Job description

Liberty Mutual Insurance in Portsmouth, NH is seeking a Principal Full Stack Engineer to join a hybrid team delivering cloud-native, enterprise-level applications. You will design, develop, and optimize multi-platform solutions, mentor teammates, and collaborate with cross-functional groups to drive engineering excellence.

Role emphasizes hands-on coding with Java Spring Boot, Node.js, API design, and modern architectures while fostering a culture of continuous improvement and reliable delivery.