MCAA Romania Chapter Interviews: Connecting Research and Researchers : Bridging Quantum Mechanics, Machine Learning, and Biomolecular Design

Welcome to the fourth edition of “MCAA Romania Chapter Interviews: Connecting Research and Researchers” - a series dedicated to highlighting the journeys of exceptional scientists, fostering cross-border collaboration, and mapping out the realities of building a sustainable research career. 

In this episode, we connect with Valentin Grădișteanu, an MSCA PhD Fellow at OneAngstrom in Grenoble—a company pioneering molecular design platforms across biological systems, materials science, and nanotechnology. Valentin’s research operates at the cutting edge where quantum mechanics, biomolecular modeling, and machine learning converge. After earning both his Bachelor’s in Chemistry and an Erasmus Mundus Master’s in Theoretical Chemistry and Computational Modelling from the University of Valencia, Valentin recognized early on the transformative power of data science, expanding his toolkit with 13 certifications in Python, Data Science, and Machine Learning.

At the core of his computational work, Valentin uses atomistic simulations to reveal fundamental protein behaviors that laboratory experiments cannot easily capture. His research journey spans from studying enzymatic catalysis to developing advanced computational methods that predict acid dissociation constants in light-harvesting complexes. By working directly on molecular software platforms at OneAngstrom, he effectively bridges the gap between high-level scientific software development and applied domains like drug discovery and biomolecular engineering.

Beyond his technical expertise, Valentin brings a deeply reflective and adaptable approach to research. Having lived and studied across Romania, Spain, and France, he excels at navigating international environments and tailoring complex scientific ideas to diverse audiences. He views a PhD not as a high-stress sprint, but as a sustainable marathon—one that balances analytical precision with daily creative outlets, embraces failure as a natural part of discovery, and fosters true scientific autonomy.

Let's dive in. 🏂

Dr. Roxana Radu:  To start, could you give us an overview of your current research focus?

Valentin Grădișteanu: I study proteins using computational methods. All forms of life depend on proteins working properly. From a chemist’s perspective, proteins are large molecules that show particular properties under given conditions, such as temperature, pressure, or pH. What makes computational methods interesting is that we can calculate these properties from simulations and, in turn, obtain an atomistic explanation of protein behaviour that would otherwise be inaccessible through laboratory experiments. Of course, studying different properties requires different computational methods, and developing these methods is itself a very active field of research.

More specifically, I previously worked on enzymatic catalysis, and I am now developing methods to determine acid dissociation constants. One direct application is within the consortium, where we study light-harvesting complexes. In short, organisms have evolved pH-dependent mechanisms to survive harsh light conditions, which are linked to changes in protein structure. While the broader biological questions are studied together with the consortium, my focus is on identifying the structural reasons behind changes in acid dissociation constants.

Dr. Roxana Radu: Research shows that pursuing a PhD can be exceptionally demanding, often taking a toll on mental health. How do you usually handle high levels of stress and prioritize a healthy work-life balance?

Valentin Grădișteanu: Everybody experiences stress in different forms. Too little stress can be just as harmful as too much. A PhD is a marathon rather than a sprint, so the real challenge is to maintain a sustainable level of pressure over time. Part of that balance comes from developing a tolerance for failure. Then, portraying working in science as a perpetual failing ritual, one must imagine researchers happy. Some scientific work will also be useful to the wider public, and that in itself is a victory, but inevitably, new questions will emerge.

I also believe that research is less rigid than it is often imagined as. Rigour and precision are essential, but intuition and creativity are just as important. I maintain balance by pursuing creative endeavours every day. When I need a break from science, I like to do something creative. It helps me relax, and I often come back to my research with a better perspective.

Dr. Roxana Radu: You have a rich international background—originally from Romania, you completed your Bachelor's and Master's degrees at the University of Valencia, and you're now pursuing your PhD in France. How have you found the experience of adapting to different academic cultures, and what are the main challenges of working in an international academic environment?

Valentin Grădișteanu: Having spent half of my life in Romania and the other half in Spain, I always find the question “Where are you from?” quite funny. I am very grateful for the education I received in both places, and my international academic exposure grew even more during my Master’s degree and PhD through conferences, secondments, talks, and poster presentations. Presenting to different audiences taught me that the way you explain an idea often has to change depending on who is listening.

Working with people from different backgrounds is a slightly different challenge. I try not to rely too much on cultural assumptions and instead understand how each person prefers to interact. I tend to adapt quite easily, ultimately, it all comes down to respect and communication.

Dr. Roxana Radu: What motivated you to pursue a Marie Skłodowska-Curie Actions fellowship? How does this fellowship fit into the broader long-term academic goals?

Valentin Grădișteanu: What attracted me to the MSCA fellowship was really the whole package: the international environment, the interdisciplinarity, the mobility, and the chance to work across different groups. I do not think I could reduce it to just one factor.

OneAngstrom was also a very good fit for me. I already knew them through their molecular animation software, and I have always liked scientific illustration. I also found developing methods to study acid dissociation constants in proteins very exciting, as it is a broad topic that offers the chance to build skills useful well beyond this specific problem, from the more technical side of scientific software development to more applied areas such as drug discovery. I also greatly appreciated the autonomy and trust I was given from the start. Authenticity and independence matter a lot to me in research, while at the same time the supervision has been excellent, so I have had both freedom and strong guidance when I needed it. I would love to continue doing research in the long term, and having that responsibility has helped me gain a lot of scientific maturity, while the freedom to explore has made me more adaptable and independent.