Freelancer profile translated to English.
Back to original languageAbout Guillaume
Passionate about IT from a young age, I spent the first half of my professional career (over 20 years of experience) satisfying the IT needs of various companies, both in software and hardware.
I have notably developed numerous applications using the PC-SOFT environment (Windev/webdev) as well as VBA for different companies of all sizes.
In addition to developing your ERP, I can assist you with processing your data to structure it into relevant dashboards for your company.
Autonomous, efficient, and rigorous, I can manage your projects from A to Z and also integrate easily into your teams.
I am currently a freelance IT professional and therefore work for myself.
My computer engineering degree and my rich experience make me a valuable asset for any company wishing to find solutions to its IT needs when its resources are lacking.
English
Fluent
Spanish
Basic
French
Native or bilingual
Remote only
Primarily works remotely
Experience
- Capgemini Bretagne - Pays de la Loire
On Malt
Cargill MissionRAW MATERIALS INDUSTRYDecember 2025 - January 2026 (2 months)Perpignan, FranceThe Cap Gemini client needed to prepare for the transition to electronic invoicing. During this preparatory phase, my role was to migrate the current invoicing system to invoicing via middleware.Modification and migration of existing code (Windev) to a standalone software allowing the generation of invoices in the database and then XML files intended to feed a middleware.This project was completed successfully. - Guillaume PetitWindev DeveloperCONSULTING AND AUDITSFebruary 2018 - Today (8 years and 4 months)Perpignan, FranceMission at Cargill/Neolait:- 200 users, about forty business applications, some over 20 years old and with source code created by different developers. Windev version 21, AS400 and SQL Server databases- Reverse engineering of existing heterogeneous modules (accounting, orders, finance, logistics...)- Redesign of certain functionalities no longer meeting business needs.- Securing processes (especially during data transfers between sales teams and headquarters)- Performance improvement (e.g., revision of thread processing)- Extensive use of versioning (GDS) to create parallel projects and rollback if regressions occur during deployment.Mission at Patrimoine Solutions:- About twenty users, intermediary in the insurance sector (demanding external clients)- Analysis of functionalities to be completed and/or redone in collaboration with technical and business teams- Reverse engineering of the database and functionalities related to the business software (Belair)- Development of complementary modules using Windev 27, Webdev, or Windev mobile.- Development of dashboards with Power BIMission at Hortigest:- Migration of a thick client + thin client software to SaaS version:- Analysis of the existing system- Refactoring of Windev 24 code to Webdev 24.- Database restructuring.- Code modernization: Transition from procedural to OOP version- Reliability of existing source code- Performance optimization
- Flexitrans (April)IT ManagerBANKING AND INSURANCEMarch 2008 - July 2017 (9 years and 4 months)Perpignan, FranceImplementation of a secure and functional IS (Hardware and software)Development of business software under AccessMigration of data from external companiesImplementation of EDICreation of an internet back office
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Education
- Computer Engineering, Robotics, and Artificial IntelligenceIMERIR1995Ingénieur en informatique industrielle, robotique et intelligence artificielle - Gestion de projet - Génie logiciel - Robotique - Intelligence artificielle - Programmation objet - Architectures réseaux ...