ML Engineer I

About the role

UST is a mission‑driven group of 29,000+ practical problem solvers and creative thinkers in more than 30 countries. We are seeking an AI/ML Engineer to design and develop an intelligent chatbot AI Agent that empowers merchants to analyze sales performance and make data‑driven decisions. The solution will leverage LLMs, prompt engineering, and MCP‑based tools (including FastMCP) to enable natural language queries, dynamic data retrieval, and actionable insights from sales data. Role Location: Arkansas. We proudly embrace the values of Humility, Humanity, and Integrity, fostering a people‑first, human‑centric culture that prioritizes sustainable solutions and diversity.

Responsibilities

• Architect, develop, and deploy a chatbot AI Agent to support merchants in analyzing sales performance and decision‑making.
• Apply prompt engineering techniques to improve query handling, ensure accurate responses, and optimize LLM interactions.
• Build AI agent workflows leveraging LangChain, LangGraph, and FastMCP for tool integration and orchestration.
• Integrate MCP tools for dynamic data access, retrieval, and analysis.
• Fine‑tune and optimize LLMs to handle merchant‑specific queries with precision and efficiency.
• Design and implement testing strategies for AI Agents and LLM‑based workflows, including evaluation of accuracy, reliability, and bias.
• Build APIs and microservices (using FastAPI) to support chatbot functionality and data pipelines.
• Deploy scalable solutions with Docker and Kubernetes, ensuring reliability and performance.
• Collaborate with product managers, data scientists, and business stakeholders to align AI solutions with merchant needs.

Requirements

• 8‑10 years of experience with hands‑on experience with LLMs, AI Agents, Chatbots, and prompt engineering.
• Strong understanding of testing and evaluation methods for LLM‑powered agents, including prompt validation, output reliability, and user feedback loops.
• Proficiency in LangChain and LangGraph for agentic workflows and orchestration.
• Familiarity with FastMCP and MCP (Model Context Protocol) for tool integration.
• Proficiency in Python for AI/ML development.
• Experience building services with FastAPI.
• Proficiency with Docker and Kubernetes for scalable deployments.
• Strong problem‑solving and communication skills to bridge technical solutions with merchant use cases.
• Ability to adapt quickly, learn complex systems, and contribute effectively in a fast‑paced environment.

Skills

• FastAPI
• LangChain
• LangGraph
• Agentic AI

Benefits

• Full‑time, regular employees accrue a minimum of 10 days of paid vacation per year.
• Receive 6 days of paid sick leave each year (pro‑rated for new hires).
• 10 paid holidays.
• Eligible for paid bereavement leave and jury duty.
• Eligible to participate in the Company’s 401(k) Retirement Plan with employer matching.
• Medical, dental, and vision insurance for employees and their US‑resident dependents.
• Company‑paid Employee Only benefits: basic life insurance, accidental death and disability insurance, short‑ and long