React Full Stack - Senior Software Engineer
Marsh McLennan•Frederick, CO
•$106,000 - $159,500•Remote
About The Position
As a Senior Software Engineer on the Marsh Agency Software Engineering team, you will design, build, and evolve full-stack capabilities for an AI-powered insurance document analysis platform. You will work with product, design, and engineering colleagues to translate business needs into secure, reliable experiences. The platform supports document processing, coverage-gap analysis, quote comparison, and real-time progress flows. You will also contribute to code reviews, automated testing, observability, and technical mentorship.
Requirements
- Strong experience building modern React applications with TypeScript, component-based UI design, and client-side API integration.
- Professional experience developing Python services with FastAPI and designing RESTful APIs, background processing, and asynchronous workflows with Celery.
- Ability to design secure, scalable systems integrating identity platforms, third-party APIs, OCR/document-processing services, and LLM-powered workflows.
- Experience with cloud-native deployment patterns, containers, CI/CD, monitoring, and production operations; AWS and Kubernetes/EKS experience is highly relevant.
- Strong communication, collaboration, problem-solving, and technical leadership skills, with a track record of mentoring engineers and delivering high-quality work.
- Hands-on experience with document-oriented or distributed data platforms such as MongoDB, Redis, and Amazon S3.
Nice To Haves
- Experience with Mastra, LLM orchestration, prompt/tool design, or AI agent workflows.
- Experience with Server-Sent Events, MongoDB change streams, OCR/document parsing, or browser-based WASM processing.
- Familiarity with Microsoft Entra ID/MSAL, infrastructure as code, or observability platforms such as Datadog.
Responsibilities
- Design, build, and evolve full-stack capabilities for an AI-powered insurance document analysis platform.
- Partner with product, design, and engineering colleagues to turn business needs into secure, reliable experiences.
- Contribute to document processing, coverage-gap analysis, quote comparison, and real-time progress flows.
- Conduct thoughtful code reviews and contribute to automated testing and observability.
- Provide technical mentorship.
Benefits
- Generous time off, including personal and volunteering time.
- Tuition reimbursement and professional development opportunities.
- Hybrid or remote work.
- Charitable contribution match programs.
- Stock purchase opportunities.
- Health and welfare benefits.
- 401(k) savings and other retirement programs.
- Employee assistance programs.
- Potential eligibility for performance-based incentives.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
Education Level
No Education Listed
