Senior AI Engineer / Data Scientist

We're looking for a Senior AI Engineer / Data Scientist to join our team in London, United Kingdom, in a hybrid working mode. This role is at the core of EPAM’s Data \& AI Practice and focuses on building state-of-the-art Generative AI, Agentic AI, and advanced data science solutions for real-world business problems. You’ll design and develop multi-agent systems, implement RAG pipelines, and deliver production-ready AI applications that transform client capabilities across multiple industries. If you're passionate about pushing the frontiers of LLMs, orchestration frameworks, and scaling AI systems into production, this opportunity offers a high-growth environment and cutting-edge challenges.   Responsibilities * Design, build, and deploy Generative AI and Agentic AI solutions from prototyping through production * Develop and optimize multi-agent systems using frameworks such as LangGraph, CrewAI, AutoGen, and Semantic Kernel * Implement orchestration patterns including planner/executor, supervisor/worker, and tool-calling workflows * Design and build RAG pipelines, including embeddings, chunking, hybrid search, and retrieval evaluation for enterprise data grounding * Develop orchestration engines supporting multi-step planning, delegation, and fallback paths for agent workflows * Implement integration and communication patterns via MCP, A2A, OpenAPI, REST, and gRPC * Build production-grade Python APIs and microservices integrating with enterprise systems and AI services * Apply observability and monitoring solutions (Langfuse, Arize, Grafana) to ensure system reliability * Contribute to solution architecture, best engineering practices, and documentation Requirements * Bachelor’s/Master’s in Computer Science, Data Science, or related field with 4+ years’ experience, or Ph.D. with relevant experience * Strong engineering experience with Python, APIs, microservices, debugging, and code review * Proven experience building and deploying Generative AI or Agentic AI applications in production * Deep understanding of LLM concepts, RAG patterns, prompt design, and evaluation methodologies * Experience with multi-agent orchestration frameworks (LangGraph, CrewAI, AutoGen, Semantic Kernel) * Familiarity with orchestration strategies like planner/executor and tool calling * Knowledge of MCP, A2A protocols, and OpenAPI-based integration methods * Strong experience with cloud environments, ideally Azure (Azure OpenAI, AI Foundry, AI Search) * Competence in containerized deployments, CI/CD, and MLOps tooling (MLFlow, Airflow) Nice to have * Experience with Microsoft Agent Framework, Azure AI Agent Service * Knowledge of vector databases (Pinecone, Weaviate, Qdrant, Milvus) * Familiarity with guardrail and AI safety techniques (output filtering, prompt injection defense) * Experience in distributed systems, event-driven architectures, and workflow engines * Prior involvement in training, fine-tuning, or experimenting with foundation models   We offer * EPAM Employee Stock Purchase Plan (ESPP) * Protection benefits including life assurance, income protection and critical illness cover * Private medical insurance and dental care * Employee Assistance Program * Competitive group pension plan * Cyclescheme, Techscheme and season ticket loans * Various perks such as free Wednesday lunch in-office, on-site massages and regular social events * Learning and development opportunities including in-house training and coaching, professional certifications, and courses * If otherwise eligible, participation in the discretionary annual bonus program * If otherwise eligible and hired into a qualifying level, participation in the discretionary Long-Term Incentive (LTI) Program