AI Application Engineer

Residency

All applicants must currently reside in the United States

Big Bear.ai is seeking an AI Applications Engineer. In this position, you will develop and maintain AI applications and a config-driven decision-support platform that combines LLM-powered chat (RAG), structured data (MCP/PostgreSQL), and dashboards to support
operational readiness and logistics workflows. You will own features end-to-end across backend APIs, database, and the modern React UI, with ongoing support for the existing Dash/Flask application during migration.

All applicants must reside in the National Capital Region.

• Build and maintain full-stack features
  :
  FastAPI services, PostgreSQL schema/migrations, and React/Type Script UI in an Nx monorepo
• Design, implement, and maintain LLM/RAG pipelines
  using Lang Chain
  (Python) or LangChain4J
  (Java)-retrieval, embeddings, tool/agent orchestration, and prompt workflows
• Integrate LLM providers (e.g. OpenAI, Anthropic, Ask Sage), document ingestion, semantic search, and chat/report features
• Work with vector stores (e.g.
  PostgreSQL (pgvector), Weaviate
  ), Redis, and Keycloak
  auth; implement role-based access and secure API patterns
• Connect to external systems via MCP
  , REST/PostgREST, and related data adapters
• Write and maintain tests
  (pytest, Vitest) and participate in CI/CD (Docker, Git Hub Actions)
• Debug production issues, improve reliability/performance, and keep dependencies and security patches current
• Use AI-assisted development tools
  (e.g. Cursor) effectively: prompt well, review generated code critically, and ship production-quality changes at a steady pace

• 3+ years
  full-stack development with strong Python
  and React/Type Script
• Must be able to obtain and maintain a security clearance
• Hands-on LLM/RAG
  experience building production features with Lang Chain
  or LangChain4J
  (chains, retrievers, agents/tools, embeddings, vector stores)
• Experience building and consuming REST APIs
  (FastAPI or similar)
• Solid PostgreSQL
  skills: schema design, SQL, migrations (pgvector a plus)
• Comfortable with Docker
  , local dev environments, and basic deployment workflows
• Strong debugging, testing, and code review habits
• Ability to work independently across backend, frontend, database, and AI layers
• Proven comfort using AI coding assistants
  as a daily workflow-not as a substitute for understanding the codebase

• Dash/Plotly, Flask, or legacy-to-modern UI migration experience
• Keycloak/OAuth, Redis sessions
• Nx monorepos, Tan Stack Router/Query, Tailwind CSS
• MCP protocol, Ask Sage, or similar enterprise LLM platforms
• Government/defense or regulated-environment experience

Please note the targeted compensation range is provided as an estimate, and any actual compensation offer may vary depending on the needs of the company, or an applicant's skillset, competencies, experience, education, certifications, location, or other factors. The estimated range does not include the value of any benefits offered.

Big Bear.ai is a leading provider of AI-powered decision intelligence solutions for national security, supply chain management, and digital identity. Customers and partners rely on Bigbear.ai's predictive analytics capabilities in highly complex, distributed, mission-based operating environments. Headquartered in McLean, Virginia, Big Bear.ai is a public company traded on the NYSE under the symbol BBAI. For more information, visit (Use the "Apply for this Job" box below). and follow Big Bear.ai

on Linked In:  and X: @Big Bearai.

Big Bear.ai is an Equal opportunity employer all protected groups, including protected veterans and individuals with disabilities.