Hi there 👋 I'm Stéphane Wirtel

Senior Python Expert | CPython Core Developer

• 🐍 CPython Core Developer since 2019
• 🎤 International conference speaker (PyCon, EuroPython, FOSDEM)
• 📝 Technical writer & blogger at wirtel.be
• 🥋 2nd DAN Karate JKA
• 🏢 Founder of MGX.IO - Python consulting
• 🏭 Former Odoo Core Developer (formerly OpenERP, formerly TinyERP)

---

📚 Latest Blog Posts

<!-- BLOG-POST-LIST:START -->

• PyCon Ireland 2026: The Call for Proposals is Open
• Ce livre Python que je voulais juste mettre à jour
• Certified AI Developer - A Journey of Growth, Grief, and New Beginning
• Automating TLS Certificate Monitoring with GitHub Actions, certificate_watcher, and Slack
• dsmtpd 1.2.0: Test Your Emails Risk-Free

<!-- BLOG-POST-LIST:END -->

➡️ Read more on my blog

---

🚀 Featured Projects

CPython Core Developer

Contributing to the Python programming language - bug triage, documentation improvements since 2019.

PythonFOSDEM

Co-Founder and co-organizer of PythonFOSDEM, a community event that has grown from 80 to 800+ attendees, bringing Python enthusiasts together at FOSDEM.

Python Ireland

PyCon Ireland co-organizer (2020–present) & python.ie maintainer — 11 years serving Ireland's Python community through code, talks, and event organization. Next edition planned for November 2026.

dsmtpd

SMTP debugging tool for Python developers - a project that evolved from a simple script to version 1.0.0 over 12 years.

Odoo (formerly OpenERP)

Senior Software Engineer at Odoo S.A. (2008–2014) — 6 years across multiple roles: Core Developer, SaaS Engineer, Technical Trainer, and Release Manager.

• Loempia — Author of the application store framework that became the foundation for apps.odoo.com
• Client integrations — Delivered on-site integrations and customizations for Odoo customers
• Technical training — Conducted training sessions internally at Odoo as well as for partners and clients
• runbot.odoo.com — Worked on the continuous integration platform used to test every branch of the Odoo codebase
• SaaS — Involved in the early days of Odoo's SaaS offering, one of the first cloud ERP initiatives in the ecosystem

---

🎤 Conference Talks

Talks delivered across Europe and North America:

• Exploring our Python Interpreter — EuroPython 2016
• Architecture of CPython, the bricks! — PyCon Canada 2016
• Django: From nightmare to a dream — EuroPython 2017
• What's new in Python 3.7 — EuroPython 2018
• CPython loves your Pull Requests — PyCon Canada 2018
• Python & PostgreSQL, a Wonderful Wedding — PyCon UK 2015

➡️ All talks on mgx.io

---

🛠️ Tech Stack & Skills

!Python
!Django
!FastAPI
!PostgreSQL
!Next.js
!Solidity
!Git
!Docker
!Ansible
!Debian
!Traefik
!scikit-learn
!pandas
!Jupyter
!PyTorch
!HuggingFace
!Streamlit
!Chainlit

Areas of Expertise:

• CPython internals and core development
• Machine Learning & Data Science
• Educational data mining and predictive analytics
• Web frameworks (Django, FastAPI, Wagtail)
• Database design and PostgreSQL optimization
• Web3 and blockchain development (Solidity, smart contracts)
• Financial systems and risk modeling
• Open source community leadership
• DevOps & Infrastructure automation (Ansible, Docker, Traefik)
• System administration and large-scale Debian migrations

---

🤖 Machine Learning & AI

Classical ML & Data Science

Recent Projects:

• 📊 Educational Predictive Analytics - ML model to identify and support students at risk of dropout
• 🔄 End-to-End ML Pipelines - From data exploration to production deployment with testing and CI/CD
• 📈 Feature Engineering - Creating business-driven features (success rates, performance trends, segmentation)

ML/Data Science Stack:

• Core ML: scikit-learn (pipelines, preprocessing), pandas, numpy
• Visualization: matplotlib, seaborn, plotly
• Tools: Jupyter notebooks
• MLOps: Reproducible builds, model versioning with joblib, CI/CD for ML

Deep Learning & NLP

DiagnosIA - Medical Diagnosis Classification System

Built a production-ready medical diagnosis system using Bio_ClinicalBERT for symptom-to-disease classification with 6 disease classes.

Key Achievements:

• Implemented transfer learning with Bio_ClinicalBERT fine-tuning
• Designed intelligent medical data augmentation (shuffle, drop, templates) preserving clinical meaning
• Achieved production deployment with 4 user interfaces (CLI, REST API, Streamlit, Chainlit)
• Architected BERT + LLM hybrid system: BERT for prediction, LLM for clinical summaries
• Multi-backend LLM support (Ollama local, Lightning.AI cloud)

Deep Learning Stack:

!PyTorch
!HuggingFace
!Transformers
!LangChain

Core Skills:

• Transfer learning & model fine-tuning
• Text classification with transformers (BERT family)
• Production ML pipelines (training, evaluation, deployment)
• Multi-device optimization (CUDA, MPS, CPU)
• LLM integration and prompt engineering
• ML application development (API, Web UI, Chat)

---

📊 GitHub Stats

!Stéphane's GitHub stats

!Top Langs

!GitHub Streak

---

📫 Connect With Me


---

🎯 Currently

• 📖 Writing and relaunching my Python 3.14 book
• 🐍 Contributing to CPython and maintaining the Developer Guide
• 🎪 Organizing PythonFOSDEM community events
• 💼 Available for Python consulting and speaking opportunities
• 🏗️ Building infrastructure automation with Ansible and Docker
• 🤖 Deep-diving into the AI ecosystem: LLMs, RAG, MCP, A2A, and autonomous agents
• 🤖 Building Deep Learning applications with transformers and LLMs (see DiagnosIA project)

---

*Last updated: May 2026*

Collapse