Join Effixis, an Artefact Company: Shape the Future of Generative AI and Large Language Models (LLMs)

Are you an expert in Large Language Models (LLMs) and excited by the challenges of building, fine-tuning, and deploying state-of-the-art AI solutions? Effixis, an Artefact company, is seeking a Senior LLM Engineer to lead innovative projects at the intersection of AI research and industry applications. If you have experience with LLMs and a strong background in NLP, deep learning, and software engineering, this is your opportunity to shape the next generation of AI-powered solutions.

Who You Are

• An experienced AI/ML engineer with a proven track record of working on LLMs and NLP applications.
• Skilled in developing, fine-tuning, and optimizing large-scale language models for real-world use cases.
• Adept at deploying LLM-powered solutions in production environments, balancing performance, scalability, and cost.
• Comfortable collaborating with cross-functional teams, including data scientists, software engineers, and business stakeholders.
• Passionate about pushing the boundaries of generative AI and applying cutting-edge research to practical challenges.

Who We Are

Effixis is part of the Artefact Group, a leading Data & AI consulting firm operating at the forefront of NLP and LLM-driven innovation. With offices worldwide, we help clients across industries—including public health, finance, manufacturing, and media—harness the power of generative AI. At Artefact, we foster a culture of collaboration, innovation, and continuous learning, and we are committed to delivering AI solutions that drive real impact.

What You Will Do

• Lead the design, fine-tuning, and deployment of LLMs for enterprise applications, leveraging state-of-the-art architectures.
• Optimize model performance, efficiency, and cost-effectiveness using techniques such as parameter-efficient fine-tuning (LoRA, QLoRA), retrieval-augmented generation (RAG), and quantization.
• Work closely with engineering teams to integrate LLMs into production systems, ensuring scalability and robustness.
• Collaborate with research teams to experiment with emerging LLM techniques, pushing the boundaries of generative AI.
• Develop APIs and infrastructure to support LLM-powered applications in real-world environments.
• Contribute to thought leadership, staying up to date with the latest AI research and helping shape the strategic AI vision at Effixis.

What You Bring

• 5+ years of experience in machine learning, with a focus on LLMs and NLP.
• Strong proficiency in Python and deep learning frameworks such as PyTorch or TensorFlow.
• Experience working with Hugging Face Transformers, OpenAI API, LangChain, or other LLM ecosystems.
• Expertise in fine-tuning and deploying LLMs, including efficient training and inference optimization techniques.
• Solid understanding of MLOps best practices, cloud platforms (AWS, GCP, Azure), and model serving solutions.
• Hands-on experience with vector databases, retrieval systems, and prompt engineering for enterprise AI applications.
• Strong problem-solving skills, ability to work in an agile environment, and excellent communication skills in English (French or Dutch is a plus).

What We Offer

• Competitive salary and benefits package.
• The opportunity to work on cutting-edge AI projects and shape the future of generative AI.
• A dynamic, collaborative, and supportive work environment.
• Access to state-of-the-art AI resources, training, and career development opportunities.
• A chance to lead impactful projects for international clients in various industries.

This position is based in Brussels.

Don’t worry if you don’t meet all the criteria! We value motivation and potential above all else. We’d love to hear from you and learn more about your passion for generative AI.