Nexttech International SRL
AI

Senior GenAI Engineer LLM Developer

Nexttech International SRL · Cluj-Napoca, CJ, RO

Actively hiring Posted about 1 month ago

Role overview

  • Work on a real enterprise AI solution with immediate business impact
  • Build production GenAI systems — not prototypes
  • Modern AI stack (LangGraph, RAG, vector search)
  • High ownership and strong technical autonomy
  • Opportunity to grow into deeper AI or architecture responsibilities over time

What you'll work on

  • LLM Integration & Development:

Implement LLM-based chatbot functionality using frameworks such as LangChain and LangGraph.

  • RAG Implementation:

Build and maintain document ingestion pipelines, embeddings, chunking logic, and vector search mechanisms.

  • Backend Development (Python-first):

Develop backend services using Python (e.g., FastAPI), exposing APIs for chatbot interaction and system integration.

  • Agent Workflows:

Implement structured LLM flows including prompt orchestration, tool calling, conversation memory, and response validation.

  • Vector Database Integration:

Work with vector databases and hybrid search systems to enable efficient semantic retrieval.

  • Enterprise Data Integration:

Connect to internal systems (APIs, document repositories, databases) and handle structured/unstructured data.

  • Quality & Evaluation:

Improve prompt quality, reduce hallucinations, and implement evaluation mechanisms to ensure consistent responses.

  • Containerized Deployment:

Package services using Docker and support CI/CD pipelines for deployment.

  • Collaboration:

Work closely with product, infrastructure, and other developers to iteratively improve the system.

What we're looking for

  • Experience with Go
  • Experience with:

  • LlamaIndex

  • Haystack

  • HuggingFace Transformers

  • LangSmith (tracing & evaluation)

    • Basic knowledge of Kubernetes
    • Experience with authentication systems (OAuth2/OIDC)
    • Experience building chat interfaces or internal tools

Tags & focus areas

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Fulltime Ai Ai Engineer Generative Ai