{"id":4180484,"url":"https://alion.io/job/liberty-mutual-group-principal-software-engineer-4","title":"Principal Software Engineer","company":{"id":712,"name":"Liberty Mutual Group","domain":"libertymutualgroup.com","url":"https://alion.io/company/liberty-mutual","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"iCIMS","truth_index":{"grade":"A","score":100,"open_postings":10,"ghost_share":0,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":13,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":"lead","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Boston, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Angular","optional":false},{"name":"AWS","optional":false},{"name":"AWS Lambda","optional":false},{"name":"CI/CD","optional":false},{"name":"Datadog","optional":false},{"name":"Dependency Injection","optional":false},{"name":"Git","optional":false},{"name":"GitHub","optional":false},{"name":"GitHub Actions","optional":false},{"name":"Hibernate","optional":false},{"name":"JavaScript","optional":false},{"name":"Kanban","optional":false},{"name":"MySQL","optional":false},{"name":"Node JS","optional":false},{"name":"PostgreSQL","optional":false},{"name":"React.js","optional":false},{"name":"Rest API","optional":false},{"name":"Scrum","optional":false},{"name":"Shift-Left Security","optional":false},{"name":"Spring Boot","optional":false},{"name":"TypeScript","optional":false},{"name":"Java","optional":true}],"status":"live","first_seen_at":"2026-11-12T17:21:35Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-12T17:21:35Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Description\nJoin us as a Principal Engineer and help shape the future of our GRS Billing platform. You'll be the hands-on technical leader for a team modernizing a large, business-critical portfolio, moving legacy applications to cloud-native, API-first, event-driven architectures on AWS. This is a highly visible role where you will set technology standards, mentor engineers across the organization, and see your designs go into production, directly improving the reliability and speed of the products our customers and employees rely on every day.\nThis role has a hybrid work schedule (2 days onsite) and we are considering candidates based in Portsmouth, NH or Boston, MA or Plano, TX\nHiring Manager: Doreen Gantt, Manager Engineering, GRS Billing Solutions\nCandidate will be responsible for technical design and development of cross-functional, multi-platform applications that solve complex business problems. The role will be a highly visible hands-on technology driver supporting platform product development by creating innovative solutions, as well as driving solutions that modernize, stabilize, and support the growth of our portfolio. You will interact with business and tech teams and focus on solution design, development, debugging and performance tuning.\nAbout the job:\nDevelop modern enterprise-level applications in the cloud. \nLead & mentor the technical design, development, and integration of solutions using existing and emerging technology platforms. \nInfluence and coach the broader technical team to help push best practices and understanding of modern design and development practices. \nDefine technology standards, guidelines, and coding practices for the platform. \nCreate architectures for large-scale web-based applications and technology \nsolutions, by collaborating with other technical leads and architects \nBecome a subject matter expert and gain a deep understanding of the Platform Application and Infrastructure framework. \nWork closely with cross-functional teams and applicable vendors. \nHands-on development with a focus on application modernization, site reliability, containerization, and building appropriate API layers in Java Spring Boot, Node.js, and other distributed technologies. \nParticipate in critical production issues, driving teams towards incident & problem ticket closure. \nParticipate in fit/gap analysis of requirements, help manage user expectations on feature deliverables, provide tactical and strategic options to address issues and technical debt, and develop code to modern standards. \nQualifications\nBachelor's Degree in technical discipline or equivalent experience. \nMinimum 8 + years of Full Stack Development experience primarily using the following technologies AWS (Lambda, Glue, DyanamoDB), Java, Spring Boot, JavaScript (NodeJS, Angular, React), Git/GitHub \nSolid understanding of cloud technologies & architecture patterns (serverless, microservice, event-driven) \nExperience with API development using NodeJS and TypeScript/JavaScript \nExperience with application observability tools, e.g., DataDog. \nExtensive professional experience developing applications using Java (Java 8+ / 11 / 17). \nHands-on experience with Spring / Spring Boot, including RESTful services and dependency injection. \nExperience building and consuming APIs (REST, JSON, OpenAPI). \nSolid understanding of multithreaded programming, concurrency, and performance tuning. \nExperience with relational databases (Oracle, PostgreSQL, MySQL) and ORM frameworks such as Hibernate/JPA. \nFamiliarity with CI/CD pipelines, automated testing, and version control (Git) and GitHub Actions. \nStrong troubleshooting skills with the ability to debug and resolve complex issues in production systems. \nA design thinking, test-driven development, and shift-left mindset. \nAbility to mentor others and raise a team's technical capabilities. \nHands-on involvement with layered systems architectures, designs and shared software concepts. \nExperience working in an agile environment. \nExcellent negotiation, facilitation and consensus-building capabilities. \nStrong leadership, coaching and mentoring skills. \nProven ability to speak to varying levels of the organization and successfully collaborate across the organization. \nAbility 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. \nOpenness and adaptability to respond to fast-moving circumstances. \nExcellent oral and written communication skills. \nEmployees may apply for a new role after completing 12 months of employment in their current position.\nEmployees should review all role requirements and apply only for positions for which they are eligible. Hiring processes may vary by country, including differences in procedures, requirements, and timelines. For country-specific details, please consult your local recruiting / HR team.\nTravel\n10%","description_format":"text","description_chars":4995,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Hybrid work"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"},{"name":"Texas","iso":null,"kind":"city"},{"name":"Massachusetts","iso":null,"kind":"city"},{"name":"New Hampshire","iso":null,"kind":"city"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Property & Casualty Insurance"],"lifecycle":[{"event":"open","at":"2026-11-12T17:21:35Z"}],"visa":[{"country":"US","licensed_sponsor":true,"adverts_offering_sponsorship_24m":0,"sanctioned_now":false,"evidence":"H-1B filings in 12 months: 42 · green card filings: 5","filings_12m":42,"filings_prev_12m":49,"green_card_filings_12m":5,"median_offered_wage_usd":130372,"route":null,"cap_exempt":false,"checked_at":"2026-11-12T07:36:15+00:00","sources":["US Department of Labor: LCA disclosure data (H-1B, H-1B1, E-3)","US Department of Labor: PERM disclosure data (green cards)"],"filings_for_role_12m":4}],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":13,"reasons":["conf:1","win:early","comp:brand"],"computed_at":"2026-11-12T19:04:06Z"},"pay":null,"html_url":"https://alion.io/job/liberty-mutual-group-principal-software-engineer-4","json_url":"https://alion.io/job/liberty-mutual-group-principal-software-engineer-4.json","meta":{"generated_at":"2026-11-12T19:04:06Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":40156,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-13T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":712},"rest":"https://alion.io/mcp/rest/get_company?id=712"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fliberty-mutual-group-principal-software-engineer-4"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fliberty-mutual-group-principal-software-engineer-4"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fliberty-mutual-group-principal-software-engineer-4"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/liberty-mutual-group-principal-software-engineer-4\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fliberty-mutual-group-principal-software-engineer-4"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4180484}},{"tool":"search_jobs","arguments":{"company":"libertymutualgroup.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4180484},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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