Lead Python Developer (AI, LLM)

EPAM Systems

Remote · UkraineSalary not disclosedfull-timeEPAM Systems Careers (remote abroad)

We are seeking a highly skilled Lead Python Developer to spearhead the implementation of a sophisticated chatbot using LangChain or LlamaIndex, with a strong emphasis on leveraging Large Language Models (LLMs) and Retrieval-Augmented Generation (RAG). The ideal candidate will have extensive experience in Python and a deep understanding of tools, embedding strategies, semantic search, vector search, and vector databases.

Responsibilities

Lead the development of chatbot solutions using LangChain or LlamaIndex with a focus on LLMs and RAG
Research and implement embedding strategies, semantic search, and vector search to enhance system performance
Design, develop, and maintain robust Python applications, ensuring adherence to best coding practices
Collaborate across teams to conduct spikes and build proof-of-concepts (PoCs) for innovative AI functionalities
Develop and integrate vector database solutions such as Pinecone, Faiss, or similar
Optimize application performance, ensuring scalability and efficiency in AI-driven systems
Implement error handling, logging mechanisms, and monitoring using OpenTelemetry
Maintain and support the .NET components of the application, including MS Teams bot integrations and other services
Conduct architectural reviews and provide technical leadership on AI-related initiatives
Ensure compliance with software lifecycle processes, assisting with code reviews and testing frameworks

Languages

Work format: Remote
Seniority: Lead
Posted: 29 Sept 2026
Last verified: In the last 5 days

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