Principal Software Engineer — Modern Surety Platform

Liberty Mutual Fire Insurance Co.; Portsmouth (NH); Hybrid; USD 140,000 - 190,000; Full time

Job summary

Liberty Mutual is seeking a Principal Software Engineer to help lead the modernization and globalization of our Surety underwriting technology platform. This hybrid role requires two days in the office weekly in our Portsmouth, Boston, or Plano tech hubs.

You will shape the technical direction, collaborate with product partners, and guide delivery teams as we evolve to a React, TypeScript, NestJS, and AWS-based architecture.

Qualifications

• Extensive principal-level software engineering experience.
• Strong experience designing scalable, maintainable systems.
• Proven ability to lead technical discussions and drive design decisions.
• Experience working in agile environments and collaborating across engineering, product, and operations.
• Ability to coach and influence engineers at multiple levels.
• Experience supporting modernization efforts and/or complex enterprise systems is strongly preferred.

Responsibilities

• Help shape the technical direction for Surety underwriting modernization, including the transition from legacy systems to a modern React / NestJS platform
• Partner with product, engineering, and delivery teams to translate Surety business needs into scalable, globally capable technical solutions
• Provide technical guidance and design support for contractor-led delivery teams to improve consistency, quality, and execution predictability
• Provide technical leadership and architectural guidance for one or more engineering teams
• Lead design discussions and help shape system and application-level solutions
• Review and influence technical decisions to improve quality, consistency, maintainability, and scalability
• Mentor engineers and help raise the technical bar across the teams

Skills

Technical leadership

Mentoring engineers

Cross-functional

Ambiguity handling

Communication

Education

Bachelor's or Master's degree in technical or business

Tools

React

NestJS

AWS

Job description

Liberty Mutual is seeking a Principal Software Engineer to help lead the modernization and globalization of our Surety underwriting technology platform. This hybrid role requires two days in the office weekly in our Portsmouth, Boston, or Plano tech hubs.

You will shape the technical direction, collaborate with product partners, and guide delivery teams as we evolve to a React, TypeScript, NestJS, and AWS-based architecture.