Senior AI Software Engineer em Porto, Portugal

About the role

Join Euronext as a Software Developer focused on AI and .NET. You will design and implement new functionalities to support core trading applications used across Euronext markets.

Responsibilities

• Translate business requirements into functional applications and innovative artificial intelligence (AI) and large language model (LLM) solutions.


• Design, fine‑tune, deploy and optimise AI and machine learning (ML) models for real‑world applications.


• Develop and refine prompts for LLM‑based solutions (prompt engineering) and experiment with model parameters.


• Create proofs of concept for research and development using notebooks (such as Jupyter) and analyse complex datasets.


• Ensure AI governance, implement guardrails, tracing and secure usage best practices.


• Design scalable, cloud‑native architectures and integrate AI solutions into .NET applications.


• Collaborate with cross‑functional teams, conduct code reviews and mentor team members.

Qualifications

• Bachelor’s or Master’s degree in computer science, engineering or a related field.


• At least five years of hands‑on experience in C# and .NET/.NET Core, with solid knowledge of database and scalable system design.


• Minimum two years of experience in machine learning, generative AI or data science, with proficiency in Python.


• Practical experience with AI model fine‑tuning, prompt engineering and LLM frameworks/tools (e.g., GPT, Transformers, Hugging Face).


• Strong experience with cloud platforms, ideally AWS (SageMaker, Bedrock) or Azure equivalents.


• Experience with containerisation (Docker, Kubernetes) and DevOps/CI/CD pipelines.


• Solid understanding of trusted AI practices, API security, AI guardrails and data privacy.


• Excellent problem‑solving skills, Agile/Scrum proficiency, and fluent English.


• Desirable: Relevant cloud or AI certifications (AWS/Azure), experience building production‑grade AI solutions, exposure to MLOps and AI governance frameworks.

Benefits

• Join a collaborative and innovative team at the forefront of capital markets technology.


• Access to continuous learning and professional development opportunities.


• Contribute to impactful projects in a dynamic, international environment.

Euronext is an equal opportunity employer. We do not discriminate against individuals on the basis of race, gender, age, citizenship, religion, sexual orientation, gender identity or expression, disability, or any other legally protected factor. We value the unique talents of all our people and are committed to providing an environment of mutual respect.