AI Engineer (LLM)

Join EPAM Vietnam as an AI Engineer (LLM) and help shape the future of AI-powered retail decision-making. You will design agent workflows, prompt and retrieval logic and production-ready services that turn data into grounded, traceable recommendations for business users. Working with cutting-edge AI technologies, structured business data and real-world retail challenges, you will play a key role in creating impactful, scalable and user-centric GenAI experiences that deliver measurable business value.

Apply today and be eligible for a one-month sign-on bonus.*

• Terms & Conditions apply .

Responsibilities

• Translate category management needs into LLM and GenAI use cases and workflows
• Design agent orchestration including prompt strategy, retrieval, tool calling and state handling
• Build back-end services and APIs for LLM applications using FastAPI and Python
• Integrate LLM providers such as Azure OpenAI and OpenAI with streaming, retries and cost controls
• Implement retrieval patterns with chunking, metadata, citations and relevance tuning
• Define evaluation approaches for relevance, grounding, safety, latency and cost
• Improve quality through testing, observability, feedback loops and iteration
• Partner with product, data, engineering and business stakeholders to ship usable features

Requirements

• Proven experience with Python back-end development, async patterns and FastAPI
• Hands-on work integrating Large Language Model (LLM) APIs such as Azure OpenAI or OpenAI
• Knowledge of LangChain or LangGraph for agent orchestration and tool workflows
• Expertise designing tool or function calling, from schemas to retries, confirmation flows and payload contracts
• Experience implementing Retrieval-Augmented Generation (RAG) with traceable sources and robust evaluation
• Ability to manage agent state through checkpointing, resumability and session handling
• Understanding of secure design for LLM applications, from secrets management to access control and prompt leakage prevention
• Clear communication with technical and business partners