Freelancer profile translated to English.

Description

I primarily work on back-end projects in .NET/C#, with solid experience in e-commerce platforms and distributed systems.

I work across the entire back-end chain: REST APIs, messaging with RabbitMQ, PostgreSQL and MongoDB databases, real-time with SignalR, containerized deployment. I am used to integrating into existing codebases, quickly understanding their constraints, and making reliable changes without destabilizing the existing system.

I value the quality of the delivered code as much as the clarity of communication with my clients. I am comfortable working independently or as part of a technical team.

If you are looking for a .NET back-end developer who can quickly take charge of a complex project, I am available to discuss it.

Industry field of expertise

Languages

English
Fluent
French
Native or bilingual

Workplace preferences

Can work on-site

Clermont-Ferrand (up to 50km)

ACCESS CULTURE
Full-Stack Developer
CULTURE
November 2025 - Today (8 months)
Clermont-Ferrand, France
Developments for an E-Commerce platform for Works Councils and their members

Optimization of administration pages handling large volumes of data, reducing loading times from about a minute to a few milliseconds.
Optimization of import processes to eliminate performance degradations impacting the online store.
Extension of administration tools to allow management of content dedicated to the mobile application.
Development of new business features, particularly automated printing of logistics labels on Brother thermal printers.
Continuous improvement of the ergonomics and user journeys on the administration and sales interfaces.
.NET MongoDB C# ASP.NET MVC Blazor
Linxens,
Full-Stack Developer
INTERNET OF THINGS (IOT)
June 2023 - May 2025 (1 year and 11 months)
Clermont-Ferrand, France
Development of an embedded IoT system in vehicles allowing IoT control from factory output to final customer deployment.
(Factory test bench with thick client, IoT configuration web app during vehicle installation, retrieval of its periodic data transmission).

Design of backend APIs in ASP.NET Core for sending and receiving commands to/from the IoT.
Implementation of an event-driven architecture based on RabbitMQ and Protobuf for bidirectional communication with IoT devices.
Development of a remote provisioning and configuration system for devices (queuing, re-try, fail-over...).
Design of the PostgreSQL schema and optimization of data processing.
Exposure of REST APIs for data transmission to an Angular front-end as well as a C#s thick client.
PostgreSQL RabbitMQ C# .NET ASP.NET Core
Yesitis,
Full-Stack Developer
INTERNET OF THINGS (IOT)
February 2022 - May 2023 (1 year and 3 months)
Clermont-Ferrand, France
Participation in solution architecture phases
Development of APIs in .NET or Java
MQTT/AMQP connection (RabbitMQ)
PostgreSQL database design
Development for Zebra printers
RabbitMQ C# .NET ASP.NET Core PostgreSQL

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BTS (Higher National Diploma)
National Center for Distance Education
2021
BTS

Flavien Macquignon

Full-Stack Developer

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