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Prompt Engineer Jobs in Chesterfield, MO (NOW HIRING)

GLOBAL IT CON LLC

Senior AI/ML Engineer

Saint Louis, MO · On-site

$99K - $136K/yr

... prompt engineering and dynamic prompt management (DB-backed with in-memory caching) - Design and implement multi-modal AI features (image analysis with vision models) - Write production-quality ...

MasterCard

Senior AI Engineer

O Fallon, MO · Hybrid

$97K - $134K/yr

Lead LLM fine-tuning, prompt engineering, and model alignment strategies - including RLHF, PEFT, LoRA, and instruction tuning - to adapt foundation models for specialized enterprise use cases.

Mastercard, Inc.

Senior AI Engineer

O Fallon, MO · On-site

$97K - $134K/yr

... prompt engineering, and model alignment strategies - including RLHF, PEFT, LoRA, and instruction tuning - to adapt foundation models for specialized enterprise use cases. • Establish robust LLMOps ...

Elite Technical

AI/ML Developer

Saint Louis, MO · On-site

... prompt engineering and dynamic prompt management (DB-backed with in-memory caching) - Design and implement multi-modal AI features (image analysis with vision models) - Write production-quality ...

New

Perficient

Forward Deployed Engineer

Saint Louis, MO · On-site

$52.25 - $69.75/hr

As a Forward Deployed Engineer you will lead and scale Perficient's Product Development practice ... Create reference architectures, model gateways, prompt governance, and evidence automation ...

McCarthy Building Companies

AI Engineer II

Saint Louis, MO · On-site

$92K - $126K/yr

Prompt engineering, evaluation methodologies, and retrieval-augmented generation (RAG) patterns. * Experience with Palantir Foundry is strongly preferred, including familiarity with: * Ontology ...

McCarthy Holdings, Inc.

AI Engineer II

Saint Louis, MO · On-site

$110 - $160/hr

Prompt engineering, evaluation methodologies, and retrieval-augmented generation (RAG) patterns. * Experience with Palantir Foundry is strongly preferred, including familiarity with: * AIP and AI ...

McCarthy Holdings, Inc.

AI Engineer II

Saint Louis, MO

$91K - $125K/yr

Prompt engineering, evaluation methodologies, and retrieval-augmented generation (RAG) patterns. * Experience with Palantir Foundry is strongly preferred, including familiarity with: * Ontology ...

Ports North

Senior Software Engineer -Java

O Fallon, MO · On-site

$82.66 - $110.21/hr

Experience with LLM integration, prompt engineering, and agentic patterns. Experience * Bachelor's degree in information systems, Information Technology, Computer Science, Engineering, or equivalent ...

New

McCarthy Holdings, Inc.

AI Engineer II

Saint Louis, MO

$91K - $125K/yr

Prompt engineering, evaluation methodologies, and retrieval-augmented generation (RAG) patterns. * Experience with Palantir Foundry is strongly preferred, including familiarity with: * Ontology ...

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Prompt Engineer information

See Chesterfield, MO salary details

$9

$46

$87

How much do prompt engineer jobs pay per hour?

As of Aug 19, 2026, the average hourly pay for prompt engineer in Chesterfield, MO is $46.60, according to ZipRecruiter salary data. Most workers in this role earn between $35.43 and $60.19 per hour, depending on experience, location, and employer.

What is a prompt engineer?

A Prompt Engineer is a professional who designs, refines, and optimizes prompts to improve interactions with AI models, such as ChatGPT. Their role involves understanding model behavior, crafting precise queries, and experimenting with phrasing to achieve desired outputs. They may work in AI research, software development, or content generation to maximize AI efficiency. Strong skills in language, logic, and sometimes coding are essential for success in this role.

What does a prompt engineer do?

A typical day for a Prompt Engineer involves designing, testing, and refining prompts to enhance the performance of AI language models, often collaborating closely with data scientists, software engineers, and product managers. You might analyze the results of model outputs, integrate user or stakeholder feedback, and iterate on prompt strategies to solve diverse business challenges. Your role will usually include documentation, troubleshooting, and keeping up with the latest advances in AI technologies. Expect a mix of independent work and regular team meetings in a dynamic, fast-evolving environment focused on innovation and improvement.

What skills and qualifications are needed to be a prompt engineer?

To thrive as a Prompt Engineer, you need a strong grasp of natural language processing (NLP), machine learning concepts, and experience crafting effective prompts for large language models, usually supported by a technical degree or relevant experience. Familiarity with tools such as OpenAI's API, Hugging Face, or other AI platforms, as well as knowledge of programming languages like Python, is highly valuable. Creative thinking, analytical problem-solving, and cross-functional communication skills help differentiate top candidates in this field. These abilities are crucial for optimizing AI outcomes and ensuring collaboration with both technical and non-technical teams.

Are prompt engineers still in demand?

Prompt engineers are currently in demand as organizations seek professionals skilled in designing effective prompts for AI language models. The role often requires knowledge of natural language processing, machine learning, and familiarity with AI tools like GPT. Demand is expected to grow as AI integration expands across industries.

How much do prompt engineers make?

Prompt engineers typically earn between $80,000 and $150,000 annually, depending on experience, location, and industry. Senior roles or those with specialized skills in AI and machine learning can command higher salaries, especially in tech hubs or companies investing heavily in AI development.

What exactly is prompt engineer work?

A prompt engineer designs and optimizes prompts used to interact with AI language models, ensuring accurate and relevant responses. This role involves understanding AI behavior, crafting clear instructions, and often requires knowledge of machine learning, programming, or data analysis.

What cities near Chesterfield, MO are hiring for Prompt Engineer jobs?

Cities near Chesterfield, MO with the most Prompt Engineer job openings:

Prompt Engineer jobs near you
Infographic showing various Prompt Engineer job openings in Chesterfield, MO as of August 2026, with employment types broken down into 89% Full Time, 8% Part Time, and 3% Contract. Highlights an 85% Physical, 6% Hybrid, and 9% Remote job distribution, with an average salary of $96,935 per year, or $46.6 per hour.

Machine Learning / Prompt Engineer (Ollama, Langchain, hugging face and tensor flow)

RIT Solutions, Inc.

Chesterfield, MO • On-site

Full-time

Re-posted 12 days ago

Job description

Job Summary:
RIT Solutions, Inc. is seeking a Machine Learning / Prompt Engineer to work on innovative AI solutions. The role involves crafting effective prompts, model training, and optimization using various machine learning libraries and frameworks.
Qualifications:
Required:
• Ollama
• Langchain
• Hugging face
• Tensor Flow
• Expert - crafting effective prompts for tasks like role-playing, summarization, classification, reasoning, and creative generation
• Machine learning (model training, fine-tuning) with python, ollama, langchain, huggingface
• Libraries (e.g. TensorFlow, PyTorch, pandas, ffmpeg, scikit-learn)
• Expert: design, optimize, model training, fine-tuning, LoRA, evaluation, and optimization
• Generative AI/LLM (Large Language Model, type of machine learning model specifically designed to process and generate human-like text.)
• Deep understanding of LLM behavior, hyperparameters, tokenization, and context windows
• Retrieval augmented generation
• testing experience.
Company:
Jobdiva Job Portal: https://www1.jobdiva.com/candidates/myjobs/searchjobsdone.jsp?a=xbjdnwgjodtga1y1im2g881fkkeiwd0775lbvq8yqgps8vb2q36w2vj1ga6xxork&compid=-1 Recruitment (contingency search and campus selection). Founded in 2019, the company is headquartered in Arlington, USA, with a team of 201-500 employees. The company is currently Growth Stage.

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