Marc Le Coz

Design, development, and marketing of a C# data manipulation component (filtering, sorting, grouping, aggregation, formatting, enrichment, etc.) applicable to any IQueryable source. Distributed in modular NuGet packages (Core, AspNetCore, EFCore), the product is designed to drastically reduce development time for data grid-based systems.

▪ Query engine based on compiling C# expression trees into LINQ: no SQL strings, no injection risk

▪ Runtime C# class generation (IL injection): for projections, dynamic groupings, aggregations, and data transformers

▪ Extensible Scheme Architecture: abstraction allowing adaptation of the request/response protocol to any grid component (AG Grid, RqGrid, custom)

▪ Server-side generated JS Bootstrapper: automatic generation of grid configuration (AG Grid or RqGrid) from the C# model

▪ Native authorization system: handlers evaluated before any query execution, declarative static filters for data scoping

▪ Design of a license system: generation, validation, and application of keys without any third-party dependencies

▪ MCP Server: AI assistants generate connectors, filters, transformers, and compilable handlers from the exposed documentation and schema

▪ RqGrid data grid (Vue 3) designed with AI: virtual scroll, grouping, filtering, automatic column generation, slot-based renderers

▪ Commercial packaging from A to Z: commercial website, complete documentation, API reference, live demo, pricing, license management backoffice

C#, ASP.NET CORE, .NET CORE, ENTITY FRAMEWORK CORE, SQL SERVER, ROWSQUERIER, LINQ, EXPRESSION TREES, IL EMIT, MCP SERVER, VUE 3, AG GRID, GITHUB ACTIONS, GITHUB COPILOT, CLAUDE, STRIPE BILLING, AZURE SERVICES

Took over technical responsibility for the project for estimating, order taking, and invoicing for the Colas group's construction sites. The goal was to drastically enrich the Quick Devis (QDV) software and enable the 5000 users to collaborate on shared documents connected to the IS.

▪ In-depth refactoring, performance improvement, and monitoring

▪ Design and implementation of APIs for collaboration with other IS applications

▪ Design and implementation of invoice dematerialization (RFE 2026 reform)

▪ Creation of command-line tools for managing migrations, correcting data, and performing one-off actions

▪ Design of Windows hosted services to control QDV, automate repetitive user tasks, extract data massively and daily to feed the IS data lake, etc.

▪ Technical project management, architectural decisions, and coordination of developments

▪ Use of generative AI to accelerate refactoring, CLI tool creation, and legacy code migrations,with systematic technical validation

C#, ASP.NET CORE, .NET CORE, .NET FRAMEWORK, INTEROP, SQL SERVER, TYPESCRIPT, AG GRID, ROWSQUERIER, AZURE DEVOPS, AZURE BLOB STORAGE, WINDOWS SERVICES

Lead developer for a startup publishing a platform for knowledge capture, enrichment, and dissemination for its clients.

▪ Design and implementation of APIs & microservices (Clean Architecture)

▪ Data extraction and processing (AWS Transcribe, Rev AI)

▪ Implementation of CI/CD processes

▪ Creation of the native Android application (Kotlin)

▪ Execution of POCs and studies for integrating client specificities

▪ Application maintenance and performance optimization

C#, ASP.NET CORE, .NET CORE, ANDROID, KOTLIN, AZURE DEVOPS SERVICES, DOCKER, AWS SERVICES (LAMBDA, COGNITO, DYNAMODB, OPENSEARCH, MEDIACONVERT, S3, TRANSCRIBE ETC.), REV AI