Principal Full Stack Engineer
Liberty Mutual1 day ago
Boston, MA, USA or Portsmouth, NH, USAStaff+
Base Salary
$143k - $201k/yr
Responsibilities
- Set the technical vision and architecture strategy for the squad’s portfolio of applications.
- Lead the architecture, design, development, and delivery of complex full-stack and backend applications and shared platform capabilities.
- Establish reusable patterns, frameworks, components, engineering standards, and best practices across teams.
- Mentor engineers, review code and technical designs, and raise engineering quality.
- Own testing, CI/CD, observability, production support, incident triage, root cause analysis, and defect resolution strategies.
- Lead impact analysis and technical solutioning for complex, systemic, ambiguous, and high-risk changes.
- Author and maintain architecture documentation, technical specifications, and production support artifacts.
- Define and lead the integration strategy for AI-powered features across product lines.
- Partner with product owners, business leaders, architects, and engineering leadership on technical strategy, prioritization, governance, and roadmaps.
Requirements
- Bachelor’s degree in a technical or business discipline.
- Minimum 8+ years of full-stack engineering experience, including experience as a technical lead or principal engineer.
- Deep expertise in object-oriented design patterns, architectural patterns, and distributed systems principles.
- Advanced proficiency with TypeScript, React, Node.js, AWS Lambda, AWS S3, SQL, Spring Boot, and GitHub Actions.
- Experience with GitHub Copilot or similar AI-assisted development products, such as Claude Code, including driving adoption across teams.
- Proven experience 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.
- Experience providing technical leadership, mentoring engineers, and driving adoption of engineering best practices.
- Experience with Agile methodologies such as Scrum and with scaling engineering practices.
- Expertise designing and optimizing CI/CD pipelines, tooling, testing frameworks, strategies, and best practices.
- Strong stakeholder influence, analytical, problem-solving, decision-making, communication, ownership, collaboration, prioritization, and adaptability skills.
- Preferred experience with AI/ML concepts, LLM APIs such as OpenAI, Azure OpenAI, or AWS Bedrock, RAG patterns, vector databases, embedding models, AI orchestration frameworks, prompt engineering, responsible AI, and AI-powered APIs or microservices.
Benefits
- Hybrid work schedule with 2 days onsite and remote-work flexibility.
- Candidates are being considered in Portsmouth, New Hampshire, and Boston, Massachusetts.
- Benefits include workplace flexibility, professional development opportunities, Employee Resource Groups, and comprehensive benefits supporting employee well-being.
- The company provides an inclusive workplace and equal employment opportunity.
Tech Stack
Categories
About Liberty Mutual
Liberty Mutual is a global mutual insurance company that provides property-casualty coverage and related services to individuals and businesses, including auto, home, renters, small commercial, specialty, surety, and reinsurance. It distributes policies directly and through brokers and partners, and also manages an investment arm deploying long-term capital. Founded in 1912 and headquartered in Boston, it is a Fortune 100 insurer operating in more than 25 countries.