Alexander Stevens

ML Engineer @ ML6 | PhD in Trustworthy AI @ KUL

Leuven, Flemish Region, Belgium

About

As a Machine Learning Engineer at ML6, I'm passionate about building production-ready code within a dynamic team environment. My current focus is on developing cutting-edge agentic workflows, a great opportunity to engage with the latest advancements in AI. I hold a PhD in Trustworthy AI from KU Leuven, where my research explored trustworthy AI for high-stakes decision-making, and I also hold a Master's in Business Engineering with a specialization in Data Analytics and Business Applications. In general, I'm passionate about building AI systems, with a special heart for explainable AI, adversarial robustness, and fairness and bias. Always happy to discuss these topics!

Experience

  • Machine Learning Engineer at ML6
    Mar 2025 - Present · 1 yr 4 mos

    Develop and deploy scalable data pipelines using agentic workflows with LLMs.

  • KU Leuven (4 yrs 9 mos)
    • Researcher in Trustworthy Artificial Intelligence
      Oct 2020 - Feb 2025 · 4 yrs 5 mos

      Designed explainable ML methods increasing the trust and adoption of AI-based decision systems in business settings As a researcher, I specialized in evaluating and enhancing the transparency and robustness of process-driven decision models, using business data from diverse sectors, including financial loan admissions, medical patient admissions, and building permit processes. In total, I collaborated on 12 papers, including Q1 journals (IEEE TSC, EJOR, ESWA) and two top-tier conference papers (ICPM). Besides my research, I also supervised 17 MSc data science projects (two of which were award-winning teams), collaborating on both academic and industry challenges. I also have the opportunity to present at invited talks on ethical and explainable AI to both academic and corporate audiences, with attendance of up to 50 people.

    • Research Assistant
      Jun 2020 - Oct 2020 · 5 mos

      Developed a Python data science tutorial on descriptive analytics and advanced multivariate statistics, used for a course of 100+ B.Sc. students learning the fundamentals of programming with Python. The tutorial covers everything from collection types, NumPy arrays or Pandas data frames, and progressed to more advanced data science case studies.

  • Visiting Researcher at QUT (Queensland University of Technology)
    Aug 2023 - Dec 2023 · 5 mos

    Developed counterfactual models for ICU admission prediction, enabling clinicians to identify patient risk factors. Paper: Plausible and Feasible Counterfactuals for Predictive Process Monitoring (published in IEEE TSC)

  • Master Thesis Intern at Brainjar
    Sep 2019 - Jun 2020 · 10 mos

    Mitigated gender bias in Kiva’s lending recommendations, increasing overall fairness by 39.97% across six key fairness metrics. Paper: Explainability and Fairness in Machine Learning: Improve Fair End-to-end lending for Kiva (Published in IEEE SSCI)

  • Data Analyst Intern at TVH
    Jan 2020 - Mar 2020 · 3 mos

    Built customer segmentation models to identify the top 10% of high-value clients, enabling targeted sales strategies.