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Senior AI Engineer

Remote in Poland
Python.Core
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We are seeking a skilled Senior AI Engineer to join our team and build evaluation-driven, secure, and scalable agentic systems. In this role, you will architect multi-agent workflows, engineer robust tool interfaces, and code AI-first every day. We value an 80% mindset and 20% skills approach, prioritizing evaluation-driven engineering discipline and the honesty to say what a demo hides over proficiency in any single framework.

Responsibilities
  • Architect, build, and orchestrate complex multi-agent workflows using LangGraph and LangChain to handle sophisticated queries
  • Develop and maintain reliable tool definitions for interacting with complex internal APIs, ensuring the AI can accurately parse, validate, and utilize data
  • Build and optimize Retrieval-Augmented Generation (RAG) systems to ground model responses in proprietary data
  • Ensure AI responses are structured for rich UI rendering, enabling the generation of dynamic graphs, charts, and interactive elements
  • Create rigorous testing frameworks, evaluation pipelines, and metrics to assess agent performance, reliability, and accuracy in production
  • Take validated prototypes to production readiness, addressing guardrails, security, cost, and scale
  • Debug and optimize multi-agent workflows with a focus on asynchronous execution, state management, and concurrency
  • Deploy and maintain production-grade AI applications with a strong DevOps mindset
Requirements
  • 3+ years of relevant experience in AI Engineering or a related field
  • Proficiency in Python and the modern AI engineering stack
  • Expertise in LangChain, LangGraph, and OpenAI SDK
  • Familiarity with Hugging Face Transformers and multi-agent workflow optimization
  • Skills in asynchronous execution, state management, and concurrency
  • Background in designing and integrating with complex REST and GraphQL endpoints
  • Competency in handling structured data formats (JSON, XML) for tool calling
  • Hands-on experience with containerization using Docker
  • Knowledge of cloud platforms such as AWS, GCP, or Azure for deploying production-grade AI applications
  • Understanding of vector databases (Pinecone, Weaviate, Chroma) and embedding strategies for semantic search and RAG implementation
  • English proficiency at an Upper-Intermediate level (B2) or higher