Yoel PEPIN

~265,000 files audited

Assignment for a family-owned construction group of 6 companies in Guadeloupe, working for the Departmental Council. Their data sat on a Synology NAS installed by a previous provider, after an incomplete migration from the old Windows server: diverging servers, no file organisation and inconsistent access rights. The CEO expected concrete solutions, not an audit.

• Python 3.12 (portable)
• pypdf
• olefile
• python-docx
• Synology DSM (SMB
• ACL

iOS / Android app for martial arts clubs in Guadeloupe: members find their schedule, progress and membership in it, and staff run the club from their phone or from a web back office. First club on board: Song Long.

• React Native 0.81
• Expo SDK 54 (Expo Router
• EAS Build
• EAS Update)
• TypeScript
• TanStack Query

Complete platform for a debt-collection firm: public website (arc-gr.fr), internal mini-CRM to track collection cases, and a private client portal to follow recovered amounts.

• React
• TypeScript
• Vite
• Tailwind
• React Hook Form
• Zod

Three-part platform for a maths teacher (public site, parent area, teacher area), built around a teaching loop: assess, identify needs, support, measure progress and keep parents informed.

• React
• TypeScript
• Vite
• Tailwind
• FastAPI
• SQLAlchemy

Migration and upgrade of a Sage Batigest infrastructure running on SQL Server, moved to a new Windows server with multi-workstation access restored.

• Windows Server
• system administration
• PowerShell
• Sage Batigest
• SQL Server Express
• Tailscale (WireGuard)

~650 tests · 100% offline

Freelance assignment for a law firm: lawyers cannot send their clients' documents to ChatGPT. Designed and delivered, single-handedly, an AI assistant running entirely on one of the firm's PCs (an RTX 3060 is enough), with no internet connection: no data ever leaves the machine (legal privilege).

• Python 3.12
• FastAPI
• SQLite
• HTML/JS
• Ollama
• Qwen 3.5 9B

To train a future model that recognises bodywork damage and estimates repair costs, DREVIO needs photos tied to the price actually invoiced. HellBoy produces this raw material: every validated case (photos, located damage, invoiced price) becomes a training sample.

• TypeScript
• Node.js
• Fastify (npm workspaces monorepo)
• React 19
• Vite
• TanStack Query

140+ PRs reviewed · 60+ deliverable work packages

Mobile app that estimates vehicle damage from AI-analysed photos: it produces an assessment report, computes a quote for each partner garage and handles online payment.

• React Native 0.86
• Expo SDK 57 (Expo Router)
• TypeScript
• Zustand
• TanStack Query
• React Hook Form + Zod

Design of DREVIO, a SaaS platform that digitises and automates vehicle damage assessment: a case is created from a vehicle and photos, damage is analysed by artificial intelligence, then a first estimate usable by body-shop professionals is generated.

• C#
• .NET 10
• ASP.NET Core
• Entity Framework Core
• React
• React Native

Topology Manager is a C# / WPF IDE for real-time collaborative programming of PLC controllers (.NET 8 API, WPF desktop client).

• C#
• WPF
• .NET 8
• Fody
• Unit tests
• C++ (legacy)

Unified web platform giving access to all Schneider products (Control Expert, Machine Expert, Automation Expert).

• Angular
• TypeScript
• WebKit
• Micro-Frontends
• API REST .NET

~5,000 accounts · ~€1.5M per week of delay (IT director)

Automate the retrieval of AT/MP (workplace accident) rates, calculation sheets and certificates for about 5,000 client accounts through NET ENTREPRISE.

• Python
• Requests
• Pandas
• AWS ECS
• DynamoDB
• S3

Several weeks of manual work per month automated

Automate the retrieval of amounts and details of financial aid for apprentices through the SYLAE platform.

• Python
• Playwright
• Requests
• Pandas
• AWS DynamoDB
• S3

Provide a secure solution to manage and access the credentials needed by the scraping processes.

• C#
• ASP.NET
• Clean Architecture
• AWS RDS (PostgreSQL)
• AES-256
• SnapLogic

Two years of the previous team's work, in 6 months

Development of a C# WinForms IDE based on CoDeSys to program Schneider Electric industrial PLCs, and work on EdgeIO, a product managing a variety of industrial modules over different communication protocols (Ethernet, ModBus, Sercos).

• C#
• Python
• TypeScript
• WinForms
• Angular
• CoDeSys

Tasks

• Software Engineer (.NET / Python):
  • In 6 months, with two colleagues also new to the team, delivered the equivalent of two years of the previous team's work
  • Integration of an Angular application into Machine Expert (WinForms .NET), adapted to handle several module types and protocols (Ethernet, ModBus, Sercos)
  • Checking and fixing communications with the hardware over OPCUA and ModbusTCP
  • Development of the overall PLC management logic in Machine Expert
  • Automation with TypeScript and Python scripts to generate configuration files
  • Thorough functional testing and delivery of new releases
• Scrum Master (SAFe certified) of an 8-person team:
  • Facilitating Agile ceremonies: System Demo, PI Planning, Daily Scrum, Scrum of Scrums
  • Coordination with teams outside the ART (Firmware, Software)
  • Proactive impediment management and rigorous Jira ticket tracking

Tech environment

• C#, Python, TypeScript
• WinForms, Angular, CoDeSys
• OPCUA, ModbusTCP, Sercos
• Jira, GitHub Enterprise, iObeya
• SAFe, Scrum

Collaborators & roles

• Stéphane ORSSAUD, Product Owner
• Guillaume LANDRU, Product Owner
• William POITEVIN, C# Engineer
• Romain GARNIER, C# Engineer
• Romain CANOVAS, TypeScript Engineer
• Ljiljana Angeleski, Test Engineer

A Clean Architecture ASP.NET MVC web application in C# for controlled sharing of Power BI reports with DIGITOM's clients.

• C#
• .NET MVC
• Entity Framework
• Power BI Service
• Power BI Embedded
• Azure AD

Containerisation of an ERP application

• Docker
• Dockerfile
• Docker Compose
• Python
• Venv
• Postgresql

Standard Power BI reports on Odoo's PostgreSQL databases for performance analysis, complementing Odoo's Dashboard module (DIGITOM, Karukera / SUEZ, Pk Trading, Groupe Barboteau). The project then fed many of the reports included in Business Zone.

• Power BI
• Python
• Odoo
• PostgreSQL
• Docker Desktop

Automatic update of several Power BI reports when a CSV file reaches a dedicated email address, to absorb the growing number of clients and the support team's manual workload (Autotask).

• Power BI Service
• Power Automate
• Azure Blob Storage
• Azure SQL Database
• Autotask

Power BI training for the managers of a large retail group: the group had a strong need for ETL and data collection, with many companies using different management software.

• Power BI Desktop
• DAX
• PowerQuery
• ETL
• Excel

Official SMGEAG application

2020 “Urgence Eau Guadeloupe” mission: facing water shortages, the State ordered prefectoral requisitions entrusted to the Karukér'Ô / SUEZ consortium. Within a 3-person DIGITOM team, built a management tool coordinating leak detectors, repairers and the network operator (SIAEAG), plus the data published on the public website urgence-eau-guadeloupe.org. Gestrav became the SMGEAG's official application for detecting leaks and tracking repairs.

• C#
• ASP.NET
• JavaScript
• OpenStreetMap
• Power BI
• Excel