Ricardo de Deijn · Applied AI Engineer
Ricardo de Deijn

Applied AI Engineer · Taylor Corporation · Minnesota

I run large language models in production, on hardware we own.

I build the serving infrastructure, computer vision pipelines, and governance that move models out of notebooks and into daily operations. Five peer-reviewed papers on the research side, one Best Paper award.

Portrait of Ricardo de Deijn
Ricardo de Deijn
MSc Data Science · Netherlands → Minnesota
4

Open-source models released

530+

Hours of manual work removed by one pipeline

5

Peer-reviewed papers, one Best Paper award

8

Conference and guest talks delivered

01 / Selected work

What I have actually shipped

Production systems at Taylor Corporation, plus the research that fed them.

01

On-premise LLM serving stack

Taylor Corporation

Designed and deployed a vLLM serving stack on owned infrastructure, removing the company's dependency on third-party AI APIs. It now hosts fine-tuning on proprietary company data, work that could not legally or commercially leave the building.

  • vLLM
  • Qwen
  • CUDA
  • Docker
  • Model quantization
02

Carrier document audit pipeline

Taylor Corporation

A production pipeline that reads unstructured carrier documentation at full invoice volume, combining YOLOv11 detection, ResNet-50 classification, and a self-hosted Qwen LLM. Three model families in one path, running against real operational throughput.

  • YOLOv11
  • ResNet-50
  • Qwen
  • PyTorch
  • Document understanding
03

Document extraction engine

Taylor Corporation

An extraction engine that cut more than 530 hours of manual work. The interesting part was not the model. It was making the output trustworthy enough that a team stopped double-checking it.

  • Python
  • LLM integration
  • Workflow automation
  • n8n
04

Company AI governance practice

Taylor Corporation

Established the practice from nothing: model documentation, risk review before deployment, and post-deployment effectiveness audits. Someone has to be able to answer what a model does and whether it still works. Now that is written down.

  • Responsible AI
  • Risk review
  • Model documentation
  • AI cost management
05

Real-time snow detection, from research to Android app

Master's thesis

A spatial-attention CNN that detects snow on sidewalks in real time, built for pedestrian safety and shipped to a phone as SnowWatch. Started as a thesis, ended as an Android app in private testing, with the mobile quantization and consent-flow problems that implies.

  • PyTorch
  • Spatial attention
  • Java
  • PyTorch Lite
  • Android
06

Synthetic data for data-scarce vision

Published research

How far can prompt-based and inverse diffusion models carry a training set when the real data barely exists? Published in JMWAIS, and the award-winning CADSCOM paper came out of the same line of work.

  • Diffusion models
  • GANs
  • FID / SID evaluation
  • Python

02 / Stack

What I reach for

Models & serving

  • vLLM for on-premise deployment
  • PyTorch, TensorFlow
  • Qwen, fine-tuning, quantization
  • YOLOv11, ResNet-50, spatial attention
  • Diffusion models, GANs
  • Evaluation: FID, SID

Engineering

  • Python, SQL, CUDA
  • Docker, Git, CI/CD
  • PySpark, ELT & ETL pipelines
  • BigQuery, Microsoft Fabric
  • n8n, Power Automate
  • Looker

Practice

  • AI governance & risk review
  • Model documentation
  • Post-deployment audits
  • AI cost management
  • Stakeholder management
  • Mentorship, public speaking

03 / Research

Peer-reviewed publications

Computer vision, synthetic data, and generative model evaluation, mostly aimed at safety problems.

2025 · Journal

Leveraging Synthetic Data from Generative Models for Snow Detection in Data-Scarce Environments

JMWAIS vol. 2025, issue 2 · with Dr. Rajeev Bukralia

Read →
2024 · Conference

Snow Classification Using Prompt-Based Generated Images

Best Paper, CADSCOM 2024 · fast-tracked for JMWAIS · with Dr. Rajeev Bukralia

Not public
2024 · Thesis

Developing a Snow Detection Algorithm Using Spatial Attention for Pedestrian Safety

Master's thesis · Minnesota State University, Mankato

Read →
2024 · Conference

Image Classification for Snow Detection to Improve Pedestrian Safety

MWAIS 2024 · with Dr. Rajeev Bukralia

Read →
2024 · Conference

Reviewing FID and SID Metrics on Generative Adversarial Networks

AIMLA 2024 · with A. Batra, B. Koch, Dr. N. Mansoor, H. Makkena

Read →

Full record on Google Scholar.

04 / Writing

Explaining the hard parts

Longer-form pieces on Medium, mostly about building computer vision systems from first principles.

05 / Speaking

On stage

Slides and details for each talk are on the highlights page.

06 / About

The short version

I am Dutch, and I now build AI systems in Minnesota. I earned my Master's in Data Science at Minnesota State University, Mankato, graduating top of my class, after a Bachelor's in ICT at HZ University of Applied Sciences with an Erasmus+ minor in Computer Science in Austria.

My thesis put a spatial-attention network on a phone to detect snow on sidewalks in real time. That set the pattern for everything since: take a model that works in a paper and make it survive contact with production. At Taylor Corporation that means owning the serving infrastructure, the vision pipelines running against real invoice volume, and the governance that keeps both accountable.

Outside of that I compete in data hackathons like Data Derby and MUDAC, and speak at conferences, usually about making a hard architecture legible to people meeting it for the first time.

Read the longer version →

Ricardo de Deijn presenting at a conference
Presenting research at conference
Ricardo de Deijn at the MWAIS conference
MWAIS 2024
Ricardo de Deijn with his Data Derby hackathon team
Data Derby team

07 / Contact

Let's talk.

Open to conversations about production LLM systems, computer vision, and speaking engagements. I read everything that comes through here.