Senior AI Engineer — Cyber Defense & AI Workflows

Arcfield; Virginia, Northern (MN, KY); Hybrid; USD 106,000 - 185,000; Full time

Job summary

Arcfield seeks an AI Developer to join a team delivering cyber analysis and development capabilities for Navy and DoD needs. You will implement features in a mission-critical line-of-business application supporting mission assurance and operational management.

The role requires Python and AI framework experience, with emphasis on AI workflows, RAG, and secure, scalable software development within an agile, government-facing environment.

Qualifications

• Active Secret clearance with the ability to obtain TS/SCI clearance.
• DoDD 8140.01 IAM Level I certification or higher.
• Experience with Python programming language; FastAPI is a plus.
• Experience developing capabilities in software applications that interface with AI systems.
• Experience using frameworks for defining AI workflows (Haystack, LangChain, LlamaIndex).
• Experience implementing retrieval augmented generation (RAG) workflows.
• Experience in context engineering (inputs, shape, size, enrichment steps, AI outputs).
• Experience developing MCP servers to interface AI agents with APIs.
• Experience evaluating model performance to select the best model.
• Experience defining AI agent instruction markdown files for CLI tools and cost management.

Responsibilities

• Develop or modify software applications from requirements specifications.
• Design, code, benchmark, debug, and document features.
• Review and assess existing enterprise applications for new features and upgrades.
• Participate in performance, load, and stress testing and remediation.
• Contribute to security architecture reviews of large enterprise systems.
• Engage in full lifecycle development: requirements, design, implementation, testing, deployment, sustainment.
• Create documentation, test scripts, and training materials.
• Work in an agile team with sprint planning, retrospectives, reviews, and daily standups.

Skills

Python

FastAPI

AI workflows

RAG workflows

LangChain

LlamaIndex

Context engineering

MCP servers

Model evaluation

Cost management

Education

BS

MS

PhD

Tools

Haystack

LangChain

LlamaIndex

Job description

Arcfield seeks an AI Developer to join a team delivering cyber analysis and development capabilities for Navy and DoD needs. You will implement features in a mission-critical line-of-business application supporting mission assurance and operational management.

The role requires Python and AI framework experience, with emphasis on AI workflows, RAG, and secure, scalable software development within an agile, government-facing environment.