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AI Engineer at Madiff. Location Information: Remote. . This is a remote position.. We are seeking a Senior AI Engineer with a strong background in Node.js and hands-on experience integrating AI and LLM-based solutions into scalable backend architectures. This is not a traditional data scientist role — we’re looking for an experienced software engineer who understands both backend system design and how to leverage modern AI tools such as LangGraph, LangChain, and Vector Databases.. . Key Responsibilities. . . Architect and implement backend services for AI-powered systems and tools. . Build intelligent agents and automation workflows using LangGraph or LangChain. . Connect and operate Vector Databases (e.g., Pinecone, Weaviate, Chroma). . Lead and maintain Node.js-based backend architectures. . Design and optimize prompt workflows for AI integration. . Integrate external APIs and third-party AI services (OpenAI, Anthropic, etc.). . Collaborate with frontend developers and product stakeholders to deliver seamless solutions. . . . . Requirements. . . Minimum 4 years of software development experience (Node.js preferred). . At least 2 years of experience working with AI/LLM applications. . Hands-on experience with LangChain, LangGraph, or similar frameworks. . Solid knowledge of vector databases and retrieval-augmented generation . pipelines. . Strong background in API design, prompt engineering, and deployment best practices. . Proficiency in both Node.js and Python. . Fluent in Polish and English (C1 level). . Nice to Have. . . Experience building AI co-pilots, chatbots, or conversational AI tools. . Working knowledge of React or Next.js for integrating backend and UI. . Familiarity with LLM providers such as OpenAI, Anthropic, or Gemini. . . . . Benefits. . . Solid, competitive . salary. .. . Work in multilingual, multinational and multicultural environment on international projects. . Medical care. . . . .