CV
TO FIX - references, volunteer, skills, work:oceanos when done. and extra stats like grades?
Basics
| Name | Coen van den Elsen |
| Label | Machine Learning Engineer/Scientist |
| coen@vandenelsen.nu |
Work
-
2025.01 - Present London, UK
Machine Learning Intern
OceanOS
Developed a marine foundation model using geospatial data to support oceanic intelligence and marine conservation.
- Created geospatial pretraining datasets from NetCDF/Zarr files using Xarray.
- Designed 3D spatiotemporal model architecture for marine data.
- Built Dockerized, multi-GPU training pipeline with cloud support.
- Implemented training failsafes including unit tests and cloud backups.
- Used CodeCarbon for environmental monitoring.
- Achieved 35× training speedup without performance loss.
- Developed end-to-end forecasting model.
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2021.09 - 2022.07 Amsterdam, Netherlands
-
2020.09 - 2025.01 Amsterdam, Netherlands
Teaching Assistant at FNWI
University of Amsterdam
Led tutorials for ~30 first- and second-year students.
- Programming (various)
- Linear Algebra
- Calculus and Optimisation
- Information Visualization
- Study orientation and career
Education
-
2023.09 - Present Amsterdam, Netherlands
-
2022.07 - 2022.12 Cape Town, South Africa
Exchange
University of Cape Town
Exchange program
- Marine Resources and Geography
- Development and Sustainability
-
2019.09 - 2023.07 Amsterdam, Netherlands
BSc
University of Amsterdam
Natural and Social Sciences - Specialization Artificial Intelligence
- Honors program
Projects
- 2025.01 - 2025.12
Reproducing NevIR: Negation in Neural Information Retrieval
- Published at SIGIR 2025.
- Replicated and extended NevIR to assess IR models' handling of negation.
- Found only cross-encoders and listwise LLM re-rankers achieved moderate performance—still below human level.
- Showed poor generalization when fine-tuning across negation datasets.
- 2023.01 - 2023.12
Geometric Algebra Simplicial Transformer
- Proposed a novel class of equivariant transformers.
- Leveraged simplicial complexes and Clifford algebra to capture full symmetry group equivariance.
- 2022.01 - 2022.12
Predicting Perceived Attributes of Urban Images
- Investigated the use of GIST features to cluster Amsterdam street scenes.
- Explored how well these clusters capture perceived attributes of urban environments.
- 2021.01 - 2021.12
Robustness Against Label Noise in Road Defect Severity Estimation
- Researched CNN-based road defect severity estimation and classification.
- Studied impact of label noise and proposed robustness strategies.
Skills
| Programming Languages | |
| Python | |
| R |
| Machine Learning Frameworks | |
| PyTorch | |
| Lightning CLI | |
| Scikit-learn |
| Data Science Tools | |
| Xarray | |
| NumPy | |
| Pandas | |
| SciPy |
| Cloud | |
| AWS | |
| DigitalOcean |
| Docker | |
| Multistage builds | |
| UV optimization |
| MLOps | |
| W&B | |
| profiling | |
| CodeCarbon |
| Mathematics | |
| Linear Algebra | |
| Calculus | |
| Logic | |
| Probability | |
| Statistics |
| Streaming/Storage | |
| Zarr | |
| memory-efficient pipelines | |
| streaming |
Languages
| Dutch | |
| Native |
| English | |
| Fluent (CEFR C1) |