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Open to collaborations
Dr Ioannis Valasakis

Finding signal in the noise.

鼓動・遊び・対比

I build machine-learning systems that pick out faint signals in noisy data. Most of the work is the engineering that makes them trustworthy: validating them with clinicians against clinical reference standards, and keeping them reliable once they are in clinical use.

Research engineer, signals and machine learning · Glasgow, Scotland
PhD, King’s College London · Research Software Engineer, University of Glasgow
02Approach

Approach

Four threads run through my work, whether the signal comes from a heart or a telescope.

01

Signal detection in noise

Arrhythmia and anomaly detection, denoising, and time-frequency analysis on noisy physiological signals. Lomb-Scargle periodograms, wavelets, and matched filtering in NumPy and SciPy, feeding LightGBM models.

NumPy / SciPyLightGBMLomb-ScargleMatched filtering
02

Deep learning at scale

Training models on millions of records in PyTorch and JAX, across multi-GPU and HPC clusters with CUDA. Reproducible data pipelines and the ordinary engineering that keeps a model dependable long after the prototype.

PyTorchJAXCUDAMulti-GPU / HPC
03

Explainable & trustworthy AI

Model interpretability with SmoothGrad, Grad-CAM, and integrated gradients, packaged in my open-source NeuroExplain library. Calibration and evaluation in scikit-learn, so clinicians can check why a model made its call.

PyTorchGrad-CAM / SmoothGradIntegrated gradientsscikit-learn
04

Research engineering & systems

Reproducible, well-tested research software in Python, with Rust and C++ where performance matters. Docker, CI/CD, and pytest on long-lived codebases, with recent experiments moving the training stack onto Kubernetes.

Python / Rust / C++Docker / KubernetesCI/CDpytest
03Recognition

Recognition

Peer-reviewed publications, competitive funding, and selective research programmes.

2025

Biological Psychiatry: Global Open Science

Peer-reviewed journal · µ-opioid modulation of sensorimotor connectivity (co-author)

2024

PhD, Machine Learning & Neuroimaging

King’s College London · explainable AI for brain connectivity

2024

OHBM: Explainable deep learning for subtyping

SmoothGrad attribution · Organization for Human Brain Mapping

2023

£100k UKRI innovation funding

Tycho MedLink · UCL & Cambridge Judge accelerators

2023

OHBM: Neurodevelopmental phenotypes via GNNs

Neonatal brain connectivity · graph neural networks

2022

Google Summer of Code

Infant eye-tracking API · mentored by McGill Ophthalmology

2021

ISMRM: 3D-VNN coronary MR angiography

Learned reconstruction · Int’l Society for Magnetic Resonance in Medicine

04Contact

Contact

Happy to talk about interesting problems in signals and machine learning. Email is the fastest way to reach me.

Open to

  • Research and engineering roles in signals and machine learning
  • Collaborations on time-series and detection problems
  • Speaking, peer review, and technical writing