Principal Full Stack Engineer
Liberty Mutual Insurance
Boston, MA · Posted April 15, 2026
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Where Boston, MA ranks
Where Boston, MA placed in our monthly rankings, month by month. Each month stays online at its own address.
November 2026
- #1Best cities for life sciences and biotech jobs793 openings · of 41
- #1Cities with the most jobs that do not need a four-year degree in New England390 jobs · of 14
- #1Best cities for AI-skill jobs in New England21% · of 28
- #1Best cities for software and engineering jobs in New England910 openings · of 24
- #1Best all-round cities for mid-career professionals in the Northeast71 / 100 · of 26
- #1Best all-round cities for mid-career professionals in New England71 / 100 · of 11
Rankings about engineering jobs
- Best cities for software and engineering jobs #1 San Francisco (3,412 openings)
- Best cities for engineering pay after cost of living #1 San Mateo ($216k)
- Most requested AI skills in engineering jobs #1 AI tools in daily work (6.1%)
- AI tools named most often in engineering jobs #1 Claude (1.7%)
- Employers with the most engineering jobs #1 Amazon (2,992 roles)
How AI is used in this kind of work
Among software developers, AI is already used for some of the tasks. Measured exposure for software developers: 29% (some).
Share of this job’s tasks that AI is already used for at work, from real usage. It is not a forecast of job loss, and a low number means no use seen yet. Source: Anthropic Economic Index.
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About the job
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.