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NEXTON

Builds digital projects for large French firms

AI Engineer

AI Application Engineering +1Posted on Nov 12
Full-timeParis, FranceNo salary listedIn-person

About the Job

Requirements

  • At least 4 years of software engineering experience.
  • Real-world experience putting LLM-based applications into production.
  • Experience with cloud projects and microservices architectures.
  • Proficiency in Python.
  • Experience with FastAPI and LangGraph, LangChain, or an equivalent framework.
  • Experience with AWS Bedrock, ECS, S3, and DynamoDB.
  • Experience with Snowflake and SQL.
  • Knowledge of generative AI, including RAG, ReAct agents, MCP, semantic search, and embeddings.
  • Knowledge of REST API design, microservices, OAuth2, OIDC, and dependency injection.
  • Knowledge of distributed tracing and structured logs.
  • Experience with Docker, Poetry, Git, and GitLab CI/CD.
  • Ability to work on a shared platform with quality, security, and maintainability requirements.
  • Fluency in French and English.
  • Ability to explain technical choices clearly.

Responsibilities

  • Develop and evolve the agentic platform foundations, including agent orchestration, MCP connectors, skills, memory, prompt management, and safeguards.
  • Design and industrialize agents by configuring prompts, tools, MCP connections, and guardrails.
  • Design and industrialize RAG pipelines, including ingestion, chunking, indexing, search, and relevance evaluation.
  • Integrate the platform with the group's data sources and systems, including Snowflake and internal APIs.
  • Deploy services on AWS using containerization, infrastructure as code, and continuous integration and deployment pipelines.
  • Implement observability through logs, traces, metrics, alerts, and response-quality monitoring.
  • Build evaluation datasets and automated agent tests to measure regressions before each release.
  • Operate services by handling incidents, improving performance and reliability, and reducing latency and costs.
  • Help AI Products and Business Science teams bring their products onto the platform.
  • Provide technical support to AI Builders and make platform foundations reusable and documented.
  • Contribute to code reviews and the team's architecture decisions.

Desired Qualifications

  • Experience with TypeScript, Next.js, AWS Lambda, Step Functions, Kinesis, or AWS Batch.
  • Experience with vector databases, agentic workflows, fine-tuning, or model hosting.
  • Experience with Jira.
  • Experience with a shared internal platform or in media, television, or streaming.
  • Sensitivity to data security, confidentiality, and compliance issues.

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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