Senior Python Developer (LLM-oriented and backend development)

Start Date: 01/10/2025

End Date: 31/03/2026, with an option for extension

Location: Brussel

Language Proficiency: English

Context:

Join the AI Engineering Team within internal IT, consisting of approximately 10 members, including 2 external contributors dedicated to this project.

Exciting Challenges:

• Collaborate on cutting-edge projects in the field of Artificial Intelligence.
• Contribute to productizing innovative solutions using Python and Generative AI.
• Work alongside a talented team of experts.

Responsibilities:

• Develop applications leveraging GenAI technology to solve specific business problems.
• Act as a team player within the platform team and collaborate closely with the teams that built the prototypes.
• Work with infrastructure teams to deploy the app, ensuring its supportability and maintainability.
• Maintain well-documented code, complete with necessary unit and integration tests.

Qualifications:

• Proficient in Python and FastAPI.
• Experience with Generative AI, including the use of OpenAI and/or Azure OpenAI APIs. Familiarity with standard data analytics libraries such as pandas, matplotlib, Streamlit, langchain, etc.
• Experience with Generative AI design patterns, such as RAG, Agentic AI, Context engineering, structured response, and so on.
• Expertise in development tools, including GIT, IDE (preferably VSCode), and CI/CD (preferably Azure DevOps-based).
• Ability to work independently, breaking down complex tasks into manageable subtasks and executing them.
• Excellent communication and interpersonal skills, with a proven track record of collaborating effectively with cross-functional teams and stakeholders.
• A proactive and results-driven mindset, capable of resolving issues independently or seeking help and driving issues to resolution.
• Strong problem-solving and decision-making abilities, with a focus on developing innovative solutions.

Typical Day:

• Development of Python-based agents integrating language models (LLMs).
• Collaboration with the Microsoft Copilot Studio team.
• Building backend applications (FastAPI or equivalent).
• Interaction with business experts to understand needs and data.
• Short projects (~2 months), often in parallel, requiring agility and autonomy.

Years of Experience:

Minimum 8 years of experience in software development.

Must Have:

• Strong Python skills.
• Experience with FastAPI or similar frameworks (Flask, etc.).
• Knowledge of LLM concepts: RAG, grounding, context engineering.
• Ability to code reliable and maintainable backend applications.
• Experience in data-oriented projects (data analytics or data science).
• Fluent English.

Ideal Candidate:

• Python developer with strong data science sensitivity.
• Able to understand business challenges and communicate with experts.
• Comfortable in dynamic environments and short-term projects.
• Experience in API development and LLM integration.

Nice to Have:

• Experience in the pharmaceutical sector (not mandatory).
• Knowledge of Azure OpenAI.
• Experience with cross-functional projects (e.g., Sky, Jarvis).

Homeworking Policy:

Hybrid: 2 days per week onsite (HQ), with flexibility depending on the profile.

Full Time?

Full-time preferred, but 4 days/week possible for the right profile.