{"id":4157348,"url":"https://alion.io/job/marsh-mclennan-react-full-stack-senior-software-engineer","title":"React Full Stack - Senior Software Engineer","company":{"id":1769686,"name":"Marsh McLennan","domain":"marshmclennan.com","url":"https://alion.io/company/marshmclennan","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":82,"open_postings":292,"ghost_share":0,"stale_share":0.901,"repost_share":0.007,"time_to_fill_p50_days":21,"computed_at":"2026-11-12T10:38:37Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["White Plains, United States","Maitland, Australia","Cincinnati, United States","Tampa, United States","Tallahassee, United States","Boston, United States","Albany, United States","Johns Creek, United States","Denver, United States","Columbus, United States","Richmond, United States","Grand Rapids, United States","Houston, United States","Duluth, United States","Los Angeles, United States","Lowell, United States","Manchester, United States","Ashburn, United States","Honolulu, United States","Fort Worth, United States","Austin, United States","Raleigh, United States","Nashville, United States","Fargo, United States","Charlotte, United States","Washington, United States","Athens, United States","San Jose, United States","Philadelphia, United States","Chicago, United States","Rio de Janeiro, Brazil","Atlanta, United States","Charleston, United States","Winston-Salem, United States","Des Moines, United States","San Diego, United States","San Francisco, United States","Columbia, United States","Troy, United States","Wichita, United States","Las Vegas, United States","New York, United States","Simi Valley, United States","Princeton, United States","Durham, United States","King of Prussia, United States","Conshohocken, United States","Memphis, United States","Baton Rouge, United States","Chattanooga, United States","New Orleans, United States","Lafayette, United States","Hartford, United States","Greensboro, United States","Schaumburg, United States","Gainesville, United States","Fayetteville, United States","Miami, United States","Irvine, United States","Wilmington, United States","Lexington, United States","Louisville, United States","Saint Petersburg, Russia","Rochester, United States","Phoenix, United States","Addison, United States","San Antonio, United States","Alpharetta, United States","Birmingham, United States","Allen, United States","San Ramon, United States","Dallas, United States","Pittsburgh, United States","Portland, United States","Boise, United States","Scottsdale, United States","Spokane, United States","Knoxville, United States","McLean, United States","Buffalo, United States","Saint Louis, United States","Tucson, United States","Virginia Beach, United States","Lincoln, United States","Cleveland, United States","Indianapolis, United States","Milwaukee, United States","Wayne, United States","Anchorage, United States","Omaha, United States","Cary, United States","Fremont, United States","Irving, United States","Minneapolis, United States","Jacksonville, United States","Seattle, United States","Dayton, United States","Lubbock, United States","Providence, United States","United States"],"countries":["US","AU","BR","RU"],"hiring_countries":["US"],"hiring_countries_total":1,"salary":{"min":106000,"max":159500,"currency":"USD","period":"year","gross":null,"usd_annual":159500},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Amazon EKS","optional":false},{"name":"Amazon S3","optional":false},{"name":"AWS","optional":false},{"name":"Celery","optional":false},{"name":"CI/CD","optional":false},{"name":"FastAPI","optional":false},{"name":"Kubernetes","optional":false},{"name":"LLM","optional":false},{"name":"OCR","optional":false},{"name":"Python","optional":false},{"name":"Redis","optional":false},{"name":"Rest API","optional":false},{"name":"TypeScript","optional":false},{"name":"AI Agents","optional":true},{"name":"Datadog","optional":true},{"name":"Mastra","optional":true},{"name":"Microsoft Entra ID","optional":true},{"name":"WebAssembly","optional":true}],"status":"live","first_seen_at":"2026-11-11T00:00:00Z","employer_posted_date":"2026-11-11","last_verified_at":"2026-11-12T11:00:47Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Company:\nMarsh McLennan AgencyDescription:\nOur not-so-secret sauce.\nAward-winning, inclusive, Top Workplace culture doesn’t happen overnight. It’s a result of hard work by extraordinary people. The industry’s brightest talent drive our efforts to deliver purposeful work and meaningful impact every day. Learn more about what makes us different and how you can make your mark as a Senior Software Engineer at Marsh Agency.\nMarsh Agency helps people and organizations manage risk and prepare for the future through insurance, benefits, retirement, and wealth management strategies. We believe in hands-on proactive service, data-driven insights, and understanding how global events can impact local decisions. As a trusted partner, we show our clients what’s possible and guide them during every step of their journey.\nA day in the life.\nAs our Senior Software Engineer on the Marsh Agency Software Engineering team, you’ll design, build, and evolve full stack capabilities for an AI-powered insurance document analysis platform. You’ll partner with product, design, and fellow engineers to turn complex business needs into secure, reliable experiences; contribute to document processing, coverage-gap analysis, quote comparison, and real-time progress flows; and help raise the bar through thoughtful code reviews, automated testing, observability, and technical mentorship.\nOur future colleague.\nWe’d love to meet you if your professional track record includes these skills:\nStrong experience building modern React applications with TypeScript, component-based UI design, and client-side API integration.\nProfessional experience developing Python services with FastAPI and designing RESTful APIs, background processing, and asynchronous workflows with Celery.\nAbility to design secure, scalable systems that integrate with identity platforms, third-party APIs, OCR/document-processing services, and LLM-powered workflows.\nExperience working with cloud-native deployment patterns, containers, CI/CD, monitoring, and production operations; AWS and Kubernetes/EKS experience is highly relevant.\nStrong communication, collaboration, problem-solving, and technical leadership skills, with a track record of mentoring engineers and delivering high-quality work.\nHands-on experience with document-oriented or distributed data platforms such as MongoDB, Redis, and Amazon S3.\nThese additional qualifications are a plus, but not required to apply:\nExperience with Mastra, LLM orchestration, prompt/tool design, or AI agent workflows.\nExperience with Server-Sent Events, MongoDB change streams, OCR/document parsing, or browser-based WASM processing.\nFamiliarity with Microsoft Entra ID/MSAL, infrastructure as code, or observability platforms such as Datadog.\nWe know there are excellent candidates who might not check all of these boxes. Don’t be shy. If you’re close, we’d be very interested in meeting you.\nValuable benefits.\nWe value and respect the impact our colleagues make every day both inside and outside of work. Our culture promotes colleague well-being through robust benefits programs and resources, professional and personal development opportunities, and fulfillment through meaningful work.\nSome benefits included in this role are:\nGenerous time off, including personal and volunteering\nTuition reimbursement and professional development opportunities\nHybrid OR Remote work\nCharitable contribution match programs\nStock purchase opportunities\nTo learn more about a career at Marsh Agency, check us out our website or flip through our recruiting brochure.\nFollow us on social media to meet our colleagues and see what makes us tick:\n· Instagram\n· Facebook\n· X\n· LinkedIn\nWhoyou are is who we are.\nWe embrace a culture that celebrates and promotes the many backgrounds, heritages and perspectives of our colleagues and clients. We are always seeking those with ethics, talent, and ambition who are interested in joining our client-focused teams.\nMarsh is committed to providing an inclusive work environment. We aim to attract and retain the best, most qualified people and value colleagues of all backgrounds, without regard to age background, disability, ethnic origin, family duties, gender orientation or expression, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, veteran status (including protected veterans), or any other characteristic protected by applicable law.\nMarsh and its affiliates are EOE Minority/Female/Disability/Vet/Sexual Orientation/Gender Identity employers.\nIf you require an accommodation during the application or interview process, please let us know by contacting .\nThe applicable base salary range for this role is $106,000 to $159,500.\nThe base pay offered will be determined on factors such as experience, skills, training, location, certifications, education, and any applicable minimum wage requirements. Decisions will be determined on a case-by-case basis. In addition to the base salary, this position may be eligible for performance-based incentives.\nWe are excited to offer a competitive total rewards package which includes health and welfare benefits, tuition assistance, 401K savings and other retirement programs as well as employee assistance programs.","description_format":"text","description_chars":5370,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["401k plan","Professional development"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Management Consulting","Health Insurance & Benefits","Insurance Brokers & Agencies","Reinsurance"],"lifecycle":[{"event":"open","at":"2026-11-12T11:00:47Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":21,"reasons":["conf:1","win:early","comp:brand"],"computed_at":"2026-11-12T12:40:26Z"},"pay":{"stated_usd_annual":159500,"is_top_pay":false},"html_url":"https://alion.io/job/marsh-mclennan-react-full-stack-senior-software-engineer","json_url":"https://alion.io/job/marsh-mclennan-react-full-stack-senior-software-engineer.json","meta":{"generated_at":"2026-11-12T12:40:26Z","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":26251,"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":1769686},"rest":"https://alion.io/mcp/rest/get_company?id=1769686"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmarsh-mclennan-react-full-stack-senior-software-engineer"},{"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%2Fmarsh-mclennan-react-full-stack-senior-software-engineer"},{"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%2Fmarsh-mclennan-react-full-stack-senior-software-engineer"},{"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/marsh-mclennan-react-full-stack-senior-software-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmarsh-mclennan-react-full-stack-senior-software-engineer"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4157348}},{"tool":"search_jobs","arguments":{"company":"marshmclennan.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4157348},"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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