AI Prompt Engineer

Responsibilities

• Prompt Design & Optimization: Develop, refine, and iterate on prompts for various generative AI models (LLMs) to elicit desired behaviors, responses, and creative outputs.
• Iterative Testing & Analysis: Conduct testing to compare prompt variations, analyze results, and drive continuous improvement.
• Collaboration: Work closely with multiple groups to integrate prompts to streamline manual processes.
• Research & Development: Stay abreast of the latest advancements in LLMs, generative AI, and prompt engineering techniques.
• Fine-tuning & RAG Support: Provide input and collaborate on strategies for model fine-tuning and Retrieval Augmented Generation (RAG) to further improve accuracy.
• Problem Solving: Debug unexpected model behaviors, identifying root causes within prompt structure, model limitations, or data context.

Qualifications

• Must be a U.S. Citizen with the ability to pass CBP background investigation, criteria include, but not limited to: 3-year check for felony convictions, 1 year check for illegal drug use, 1 year check for misconduct such as theft or fraud.
• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or related field (equivalent experience may be considered in lieu of degree).
• 0–3 years of professional software development experience, internships, or relevant academic project work.
• 1+ year of hands-on experience working with Large Language Models (e.g., OpenAI GPT series, Llama, Gemini) or other generative AI models.
• Experience with at least one programming language (Python, JavaScript/TypeScript).
• Familiarity with prompt engineering techniques (few-shot, chain-of-thought, structured outputs, function calling).
• Willingness to work a hybrid schedule with onsite requirements in Ashburn, VA.

Desired

• Problem-solving skills, with a data-driven approach to experimentation and optimization.
• Written and verbal communication skills, with an ability to articulate complex technical concepts clearly.
• 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 (e.g., prompt injection, bias, data privacy).
• Exposure to Agile/Scrum development environments.

Benefits

A culture of integrity. At CACI, we place character and innovation at the center of everything we do. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

An environment of trust. CACI values the unique contributions that every employee brings to our company and our customers - every day. You’ll have the autonomy to take the time you need through a unique flexible time off benefit and have access to robust learning resources to make your ambitions a reality.

A focus on continuous growth. Together, we will advance our nation's most critical missions, build on our lengthy track record of business success, and find opportunities to break new ground — in your career and in our legacy.

The Proposed Salary Range For This Position Is $61,100 - $122,200. CACI is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, age, national origin, disability, status as a protected veteran, or any other protected characteristic.