Engineer Jobs in East Peoria, IL

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AI Engineer

Caterpillar East Peoria, IL

East Peoria, IL

Today

$98k - $158k/yr Full time Agentic Ai Ai Agent Ai Agent Engineering

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Job Description

Build production-grade AI for real-world operations at Caterpillar. This on-site AI Engineer role in East Peoria, IL or Irving, TX focuses on designing and optimizing LLM-powered systems, including RAG pipelines and autonomous agent workflows, with rigorous testing, evaluation, and observability to support safe, reliable, and deterministic AI behavior. The position offers a salary range of $97,530 - $158,480 per year and includes comprehensive benefits for both full-time and part-time employees.

What you will do

Architect, version, and refine system, contextual, and dynamic prompt strategies using approaches such as Chain-of-Thought, Tree-of-Thoughts, ReAct, and Few-Shot learning.
Reduce hallucinations, jailbreaking, and prompt injection risk using programmatic guardrails and adversarial prompting techniques.
Adapt, benchmark, and fine-tune prompt structures across diverse open-source and proprietary frontier models.
Design and orchestrate multi-agent systems and multi-step reasoning workflows with frameworks such as LangGraph and LangChain.
Integrate and fine-tune Retrieval-Augmented Generation (RAG), covering semantic search, chunking strategies, embedding models, and vector database query workflows.
Create precise function-calling and tool-use prompting so LLMs can reliably interact with external APIs, databases, and legacy codebases.
Build automated evaluation and testing using RAGAS and Evals to validate RAG accuracy and support continuous benchmarking across datasets and models.
Implement regression testing plus CI/CD pipelines to confirm prompt stability, agent trajectory correctness, and tool-calling accuracy.
Set up production monitoring and observability with tools including Azure Application insights and Microsoft Foundry.
Track and optimize runtime metrics such as semantic drift, token usage, cost efficiency, and end-to-end latency.
Collaborate with Product Managers, Data Scientists, and Software Engineers to translate commercial requirements into deterministic AI capabilities.
Keep up with rapid changes in LLM capabilities, evaluation frameworks, and orchestration libraries.

What you bring

Expert-level mastery of structured prompt formats (including XML and JSON wrappers), system-level steering, and context-window optimization.
Strong proficiency in Python or TypeScript for backend AI logic, asynchronous data processing, and API integration.
Hands-on experience building applications using LangChain, LangGraph, and native SDKs.
Solid experience with vector databases such as Azure AI Search and AWS Open Search, including hybrid search retrieval.
Strong data skills using Pandas and NumPy, including data cleaning and token handling, plus foundational understanding of NLP transformers.
Experience implementing Application Insights, OpenLLMetry, or custom evaluation and guardrail layers.
Knowledge of deep learning architectures, fine-tuning frameworks such as QLoRA and PEFT, and platforms like Hugging Face, PyTorch, or TensorFlow.
Experience deploying containerized AI microservices with Docker, Kubernetes, and cloud platforms including AWS or GCP.
2+ years of dedicated professional experience developing production software integrated with GenAI/LLM pipelines.
A bachelor’s or master’s degree in a relevant field such as Computer Science, Data Science, Artificial Intelligence, Computational Linguistics, or Mathematics (or a highly technical discipline).
A proven portfolio showing successfully deployed RAG systems or operational AI agents in commercial environments.

Benefits

Medical, dental, and vision benefits
Paid time off plan (Vacation, Holidays, Volunteer, etc.)
401(k) savings plans
Health Savings Account (HSA)
Flexible Spending Accounts (FSAs)
Health Lifestyle Programs
Employee Assistance Program
Voluntary Benefits and Employee Discounts
Career Development
Incentive bonus
Disability benefits
Life Insurance
Parental leave
Adoption benefits
Tuition Reimbursement
These benefits also apply to part-time employees

Role details

Location: East Peoria, IL or Irving, TX (onsite)
Work schedule: Onsite five days a week
Visa Sponsorship: Not available
Posting dates: October 27, 2026 - November 8, 2026
Salary pay range: $97,530.00 - $158,480.00
Career area: Technology, Digital and Data

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