Hybrid Principal Software Engineer – Modernizing Surety

Liberty Mutual Insurance; Portsmouth (NH); Hybrid; USD 170,000 - 210,000; Full time

Job summary

Liberty Mutual Insurance is advancing its Surety underwriting technology with a modern React/NestJS/AWS architecture. As a Principal Software Engineer, you’ll shape technical strategy, lead multiple engineering teams, and partner with product and delivery stakeholders across Portsmouth, Boston, or Plano tech hubs.

You will mentor engineers, drive durable, scalable solutions, and balance near-term delivery with long-term architecture health in a complex enterprise environment.

Qualifications

• This role requires demonstrated leadership in building large software systems with engineering excellence.
• Ability to thrive in ambiguous, evolving environments with multiple stakeholders.
• Experience applying modern AI engineering practices and agentic development approaches.
• Influence without formal authority to align teams on technical direction.
• Strong mentorship and ability to raise team capabilities.

Responsibilities

• Shape technical direction for Surety underwriting modernization across platforms.
• Lead design discussions and guide system and application-level solutions.
• Provide architectural guidance for contractor-led delivery teams to improve quality and consistency.
• Mentor engineers and elevate the technical bar across teams.
• Collaborate with product, engineering, and delivery to translate business needs into scalable tech solutions.

Skills

Technical leadership

Ambiguity handling

AI engineering

Mentoring engineers

Cross-functional collaboration

Hands-on development

React/NestJS/AWS

Education

Bachelor's or Master’s in a technical field

Tools

AWS

Git

CI/CD pipelines

Job description

Liberty Mutual Insurance is advancing its Surety underwriting technology with a modern React/NestJS/AWS architecture. As a Principal Software Engineer, you’ll shape technical strategy, lead multiple engineering teams, and partner with product and delivery stakeholders across Portsmouth, Boston, or Plano tech hubs.

You will mentor engineers, drive durable, scalable solutions, and balance near-term delivery with long-term architecture health in a complex enterprise environment.