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NEXTON

Builds digital projects for large French firms

Data Scientist / AI Engineer - Banque

AI Application EngineeringConfirmed live in the last 24 hours
Full-timeÎle-de-France, FranceNo salary listedIn-person

About the Job

Requirements

  • Six to nine years of experience as a data scientist.
  • Knowledge of generative AI and large language models, including advanced retrieval-augmented generation architectures, multi-agent tools such as LangChain, LangGraph, or Semantic Kernel, prompt engineering, fine-tuning, and vector databases.
  • Advanced Python software engineering, API development with FastAPI, containerization with Docker and Kubernetes, CI/CD pipelines, MLflow, and Git version control.
  • Applied statistics, supervised machine learning including gradient boosting, predictive-model optimization, and explainable AI using SHAP and LIME.
  • Experience with cloud platforms including Azure, Azure AI Foundry, Azure AI Search, and Azure ML, and big-data environments including Databricks and PySpark.
  • Demonstrated ability to industrialize complex AI products and maintain them in operational condition at scale.
  • Active monitoring of developments in generative AI and agentic AI.
  • Ability to explain AI topics to non-specialists and collaborate with business, IT, and product teams.

Responsibilities

  • Design robust retrieval-augmented generation architectures, build multi-agent workflows for complex processes, and orchestrate large language models including Azure OpenAI and open-source models with function calling and reasoning capabilities.
  • Develop reusable API components using FastAPI and cloud services, define technical standards, and deploy MLOps and LLMOps practices including CI/CD, Docker, and Kubernetes to ensure production quality, reliability, and security.
  • Design and maintain supervised machine-learning models, including XGBoost and LightGBM; conduct exploratory analyses; and ensure explainability and responsible algorithms using SHAP and LIME.
  • Implement observability for generative AI systems, monitor model and retrieval-augmented-generation drift, and measure generated-response quality using evaluation frameworks such as RAGAS and LLM-as-a-Judge.

About the Company

NEXTON

Builds digital projects for large French firms

NEXTON plans and builds digital projects for large French companies and online businesses, combining digital strategy with software development and marketing. Its teams cover product management, user-experience design, agile delivery and data work, and build websites, mobile applications and customer communications. Clients pay for specialist consultants assigned to their teams or for projects delivered by NEXTON's own agency. The agency combines designers, developers and marketing specialists to handle projects from planning and interface design through development and delivery. Founded in Paris in 2011, NEXTON is headquartered there at 5-7 rue Saint-Fiacre and operates across France.

Company size
Not listed
Company stage
Not listed
Total funding
Not listed
Headquarters
Paris, France
Founded
2011

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