AI Prompt Engineer

CACI International Inc

. Design, refine, and iterate prompts for generative AI models and LLMs .

Posted 10/9/2026full-timeAshburn • Virginia • United StatesJunior💰 $39,400 - $72,600 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in prompt engineering for generative AI models and LLMs, with a strong focus on testing, analysis, and continuous improvement. Proficient in Agile software development practices and capable of collaborating effectively within a geographically dispersed team.

Highest-signal resume keywords

Prompt Engineering TechniquesLarge Language Models ExperiencePython or JavaScript/TypeScript ProficiencyAgile/Scrum Development ExposureAI Safety Considerations Understanding

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Prompt EngineeringGenerative AI ModelsLarge Language ModelsSoftware DevelopmentPythonJavaScriptTypeScriptAgile DevelopmentModel Fine-TuningRetrieval Augmented Generation

Soft Skills

CollaborationAnalytical ThinkingProblem-Solving

Industry Keywords

AI SafetyPrompt InjectionBiasData PrivacyEmbeddingsVector Databases

Tech Stack

Tools & technologies

JavaScriptPythonTypeScript

About the role

Key responsibilities & impact

Design, refine, and iterate prompts for generative AI models and LLMs
Test prompt variations and analyze results to drive continuous improvement
Collaborate with multiple groups to integrate prompts and streamline manual processes
Research advancements in LLMs, generative AI, and prompt engineering
Provide input on model fine-tuning and Retrieval Augmented Generation strategies
Debug unexpected model behaviors and identify root causes in prompt structure, model limitations, or data context
Develop innovative software solutions within a geographically dispersed team
Support Agile software development and short-sprint software deployment for CBP and DHS missions

Requirements

What you’ll need

Must be a U.S. Citizen
Ability to pass CBP background investigation, including a 3-year check for felony convictions, 1-year check for illegal drug use, and 1-year check for misconduct such as theft or fraud
Must be available to work onsite in Ashburn, VA and/or Washington, D.C.
1–3 years of professional software development experience, internships, or relevant academic project work
1+ year of hands-on experience with Large Language Models or other generative AI models
Experience with at least one programming language: Python or JavaScript/TypeScript
Familiarity with prompt engineering techniques, including few-shot, chain-of-thought, structured outputs, and function calling
Exposure to RAG concepts, including embeddings and vector databases
Understanding of AI safety considerations, including prompt injection, bias, and data privacy
Exposure to Agile/Scrum development environments

Benefits

Comp & perks

Flexible time off benefit
Robust learning resources
Healthcare benefits
Wellness benefits
Financial benefits
Retirement benefits
Family support benefits
Continuing education benefits
Time off benefits
Competitive compensation