Senior Full Stack Engineer

Come and join the MDC Team where we thrive on data to solve high\-impact business problems! **About the Role:** The candidate will own the human\-in\-the\-loop surface of the GenAI IDP platform end to end: the React/Next.js UI and the backing API/BFF services that feed it. This is a streaming, stateful window into live agent execution supporting DCSA document processing workflows — not generic web development. The engineer owns the vertical slice from React component through the SSE event pipeline to the backend route that serves it — durable chat state, notification architecture, tool\-call and artifact visualization, document classification results rendering, and trace exploration. This role directly supports the GenAI IDP engagement milestones: building the user interface for document upload, classification review, field extraction validation, and user acceptance testing dashboards. The engineer integrates with Customer identity providers, monitoring tools, and deployment pipelines as defined in the Task Description. Basic Qualifications * 3\+ years of non\-internship professional software development experience * Experience building production web applications with TypeScript and a modern React framework (React/Next.js) * Experience building and operating backend services or APIs (e.g., FastAPI, Node) that a frontend consumes * Experience with real\-time or streaming interfaces (Server\-Sent Events, WebSockets, or equivalent), including handling reconnection and out\-of\-order events * Experience with automated testing at the unit and end\-to\-end level (e.g., jest, Playwright) as part of the definition of done * Experience diagnosing defects across the stack — from a client\-side symptom to the backend route or payload that caused it — using logs and traces as evidence Preferred Qualifications * Experience building interfaces for AI/agentic or other long\-running, streaming systems (token\-by\-token output, tool\-call visualization, document classification result rendering, run/trace inspection) * Experience with GenAI/LLM integration: prompt engineering workflows, model evaluation dashboards, fine\-tuning pipeline UIs * Experience deploying applications in AWS GovCloud or classified (IL5/IL6\) environments * Experience integrating with DoD identity providers and CAC/PIV authentication * Experience with client and server state management and optimistic\-update patterns * Proficiency using AI coding assistants as a daily driver, with the judgment to verify their output against tests and traces before merging * Experience with distributed tracing (OpenTelemetry) from the application side * Experience with AWS services: Amazon Bedrock, S3, Lambda, Step Functions, CDK * Bachelor's degree in Computer Science or equivalent practical experience Job Type: Full\-time Pay: From $120,000\.00 per year Benefits: * 401(k) * 401(k) matching * Dental insurance * Flexible schedule * Health insurance * Life insurance * Paid time off * Referral prog