> Markdown version of [/jobs/ext/2327983-ai-engineer](https://www.wearedevelopers.com/jobs/ext/2327983-ai-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# AI Engineer

- **Company:** HarfangLab
- **Location:** Paris, France
- **Salary:** €44,000.0 - €54,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Cyber Security, Continuous Integration, Information Engineering, Python (Programming Language), Machine Learning, Open Source Technology, Systems Integration, Chatbots, Pytorch, Large Language Models, Multi-Agent Systems, Deep Learning, Scikit Learn, Low Latency
- **Published:** August 10, 2026
- **Apply:** https://fr.indeed.com/viewjob?jk=2e03a66e7e01c644

## About the Role

* You can read and understand Python code.
 * You have a solid understanding of how LLMs work, including data gathering, prompting, fine-tuning, inference, attention mechanisms, and tokenization.
 * You have hands-on experience working with LLMs through APIs or local deployments and have built applications such as RAG systems, tool-calling workflows, agents, or chatbots.

Nice to have:

 * Basic knowledge of cybersecurity.
 * Experience with agent frameworks such as LangGraph, PydanticAI, Haystack AI, or similar.
 * Knowledge of machine learning or deep learning frameworks such as Scikit-learn, PyTorch, or equivalent.

Soft Skills:

 * You are curious and autonomous, and you are comfortable taking ownership of topics that are not yet fully defined.
 * You have strong analytical skills and can help structure complex problems so that other team members can contribute effectively.
 * You enjoy collaborative work, communicate clearly, and are comfortable asking for or offering help when needed.
 * You are motivated to actively contribute to integrating your work into the HarfangLab product.

## Description

You will contribute to the design, development, and deployment of these new features, from prototype to production. Your responsibilities will include:

 * Building investigation agent pipelines (planning, tool calling, synthesis).
 * Designing and maintaining an evaluation framework to measure system performance and track metrics over time.
 * Evaluating foundation models (open-source and proprietary) against our use cases and documenting trade-offs between cost, latency, and quality.
 * Industrializing developments within a shared codebase through testing, packaging, documentation, and CI/CD best practices.
 * Integrating solutions into the product, deploying them, and monitoring them in production.

Depending on your interests and background, you may also have the opportunity to work on machine learning, deep learning, or data engineering projects.


## Related Videos

- [Photonic Computing: Programming a New Class of AI Accelerators (incl. Live Coding)](https://www.wearedevelopers.com/videos/100196-photonic-computing-programming-a-new-class-of-ai-accelerators-incl-live-coding)
- [Chatbots are going to destroy infrastructures and your cloud bills](https://www.wearedevelopers.com/videos/1130-chatbots-are-going-to-destroy-infrastructures-and-your-cloud-bills)
- [Swapping Low Latency Data Storage Under High Load](https://www.wearedevelopers.com/videos/746-swapping-low-latency-data-storage-under-high-load)
- [Building AI Applications with LangChain and Node.js](https://www.wearedevelopers.com/videos/1512-building-ai-applications-with-langchain-and-node-js)
- [Beyond Chatbots: How to build Agentic AI systems](https://www.wearedevelopers.com/videos/1629-beyond-chatbots-how-to-build-agentic-ai-systems)
- [Serverless deployment of (large) NLP models ](https://www.wearedevelopers.com/videos/158-serverless-deployment-of-large-nlp-models)

## Related Articles

- [What Are Large Language Models?](https://www.wearedevelopers.com/magazine/304-what-are-large-language-models)
- [How to Become an AI Engineer](https://www.wearedevelopers.com/magazine/331-how-to-become-an-ai-engineer)
- [MLOps And AI Driven Development](https://www.wearedevelopers.com/magazine/82-mlops-and-ai-driven-development)
- [What is Agentic Programming and Why Should Developers Care?](https://www.wearedevelopers.com/magazine/625-what-is-agentic-programming-and-why-should-developers-care)
- [Dev Digest 137 - AI'm not sure about this](https://www.wearedevelopers.com/magazine/485-dev-digest-137-ai-m-not-sure-about-this)
- [MLOps – What’s the deal behind it?](https://www.wearedevelopers.com/magazine/125-mlops-what-s-the-deal-behind-it)