AI Prompt Engineer

CACI International Inc

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

Posted 9/29/2026full-timeAshburn • Virginia • United StatesJunior💰 $53,100 - $106,300 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in prompt engineering for generative AI and LLMs, with a strong focus on collaboration, problem-solving, and Agile methodologies. Proficient in translating complex requirements into effective AI interactions while ensuring adherence to AI safety considerations.

Highest-signal resume keywords

Prompt Engineering TechniquesLarge Language Models ExperiencePython or JavaScript/TypeScript ProficiencyAgile/Scrum Development ExposureData-Driven Problem Solving

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Prompt EngineeringGenerative AI ModelsLarge Language ModelsSoftware DevelopmentPythonJavaScriptTypeScriptData AnalysisModel Fine-TuningRetrieval Augmented Generation

Soft Skills

Written CommunicationVerbal CommunicationCollaborationProblem-SolvingIndependence

Tools & Technologies

Agile Software DeliveryVector DatabasesEmbeddings

Industry Keywords

AI Safety ConsiderationsPrompt InjectionBiasData Privacy

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 techniques
Provide input on and collaborate 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
Translate complex requirements into effective AI interactions
Develop innovative software solutions as part of a technically diverse and geographically dispersed team
Support Agile software delivery and deployment in short sprints

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, a 1-year check for illegal drug use, and a 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 working 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
Problem-solving skills with a data-driven approach to experimentation and optimization
Written and verbal communication skills
Ability to work independently and collaboratively in a fast-paced, evolving environment
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
Learning and development opportunities