Professional background

Guy Colsoul

C# SQL Blazor MAUI AI Developer

As a senior software developer with a results-oriented and pragmatic mindset, I challenge your projects in order to design professional, robust and sustainable solutions.
Accustomed to designing, evolving and maintaining complex software solutions (an ERP system), I pay particular attention to software architecture and the overall consistency of the solutions.
Backed by solid technical expertise and software architecture experience, I nevertheless always place business needs first. Understanding the project's context, environment and objectives is essential to delivering the most relevant and effective solution.
This dual perspective, combining business and technical considerations, is part of my DNA and enables me to build robust, high-performance and long-lasting solutions.

Professional Experience

At Ineo srl - publisher of the Mercator Business Management Software

Since september 2026

Freelance developer

Registration with the Crossroads Bank for Enterprises (Belgium): 065753370

Since january 2025

ERP Product owner

Reorganisation of the company's organisational structure. On this occasion, the "Product Owner" job title and its responsibilities were formally established: defining the product's functional direction, overseeing its technical implementation, and ensuring the long-term sustainability of its architecture. Continued technical involvement: daily software development within the product.

December 1993 - December 2024

CEO
Founder
ERP Developer

Technical expertise:

Active ERP development, including the migration from Visual FoxPro to .NET.
Database design, query optimisation, and implementation of a SQL Server-based client-server architecture.
Implementation of code validation procedures.
Development of the complete software ecosystem: desktop application, mobile applications, licence server, inter-site communication servers, web services, e-commerce website, …
Authoring of the technical documentation.
Development of the company's website, including the support portal.

Managerial and organisational responsibilities:

Management: strategic decision-making, definition and implementation of work processes, team organisation, continuous improvement of internal methods, coordination, …
Human Resources: recruitment, employee onboarding, coaching and support of the team, interaction with the payroll provider and other service providers, fleet management, …
Day-to-day accounting and collaboration with the accounting firm for the preparation of the annual financial statements.
Establishment and development of a sister company in Luxembourg (Adeo, 2012–2022), requiring a thorough understanding of a distinct legal, administrative and tax environment, as well as the coordination of activities between both companies.

Others

September 1994 - June 1995

Accounting Lecturer

IEPS Namur

Alongside my role at Ineo, I taught Financial Accounting and Management Accounting as an expert lecturer to second-year accounting students in an adult continuing education programme (evening classes).

The starting point was simple:to acquire the accounting knowledge required for my professional activities.The conventional approach would have been to attend a course.I chose to set myself a more ambitious goal: to be able to teach it.

September 1992 - March 1993

Junior business and IT consultant

Mailleux & Associates

First hands-on professional experience within several SMEs.
Professional immersion in a Dutch-speaking working environment (Sint-Truiden).
Financial analysis.
Development of software tools for measuring various business performance indicators.

September 1991 - June 1992

Teaching and Research Assistant - Quantitative Methods and Management Information Systems Unit

UCL IAG (now the Louvain School of Management)

Assistant in operations research and management information systems. Conducting tutorial sessions for business engineering students (3rd and 4th year) and for the postgraduate programme in business management.

September 1989 - December 1990

Job student

Apple Computer Belgium

Implementation of a multimedia self-learning centre at Apple Computer.
Business process analysis, design of management procedures, and HyperCard programming (object-oriented programming language).
Participation in the Bureau 90 trade fair (Heysel), at Apple's High Technology Corner: bilingual (FR/NL) demonstrations of technology products.
Part-time position (2/5) while pursuing my studies.

Education

1987 – 1991

Business engineer

UCLouvain

Specialisation in quantitative methods and management Information systems
(official French degree title: "Ingénieur commercial et de gestion")

2009 – 2012

Certificate of Biblical Studies

Faculty of Theology of the Catholic Institute of Toulouse

Introduction and O.T. - Distance Learning

Skills

C#

MAUI

Blazor

T-SQL

SQL Server

Attention to detail

Sense of Responsibility

Methodical Approach

Empathy

Responsiveness

Commitment

Loyalty

Languages

French: native language
English: reading proficiency - technical
Dutch: good working proficiency

Interests

My three grandsons

Mountain biking in the Ardennes

Hiking

Mountains

Learning Italian

French hunting horn