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Description

Are you looking for a .NET developer?

Do you need to design or evolve a backend?

Do you want it to be robust, capable of supporting your application's growth?

I am a software engineer specializing in the .NET ecosystem.

I have 6 years of experience in developing WMS (Warehouse Management System) software.

I contributed to several projects within Fives Syleps, a subsidiary of the international group Fives.

My goal is not to be indispensable. It is to make your team autonomous.

I deliver code that is:

- clean

- documented

- understandable

Not a system that you can no longer evolve without me.

Every technical decision is explained, every architectural choice is transmitted.

When my mission ends, your team knows where it stands and can continue on its own.

And if one day you need occasional reinforcement, you know who to call — not because you are stuck, but because you have confidence.

As a .NET developer, I can assist you with:

- Analysis and scoping of business needs

- Design and development of backend APIs (.NET / ASP.NET Core)

- Design of application architectures (modular monolith or microservices)

- Integration and communication between services (APIs, messaging)

- Development and evolution of business applications in a .NET environment

- Refactoring and improvement of existing code

- Database modeling and optimization

- Training and support for technical teams

- Technical documentation and knowledge sharing

I pay particular attention to clarity in communication with my clients.

Structured communication, regular updates, explicit decisions: my clients always know the project's status.

Shall we discuss your project?

Contact me, I respond in under an hour.

wms, dotnet, .NET backend, .net c# developer, .net core, fullstack, full-stack, full stack, ".net", .net azure, software engineer, development engineer

Industry field of expertise

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Nantes (up to 50km), Paris (up to 50km), Lyon (up to 50km), Bordeaux (up to 50km), Rennes (up to 50km)

Extra-professionnel
Personal Projects | API & iOS Application Development
SOFTWARE PUBLISHING
June 2025 - January 2026 (7 months)
During this period, I developed several APIs as part of technical experiments around application architecture and backend project structuring.

→ Personal Software Projects - API & Architecture

These projects aimed to explore different architectural approaches and code organization in modern applications.

The experiments focused on:
- Development of REST APIs in ASP.NET Core and FastAPI
- Design and implementation of modular monolithic architectures
- Relational data modeling
- Implementation of OAuth2 authentication mechanisms
- Error handling and API response structuring
- Implementation of unit tests
- API documentation and standardization via OpenAPI

→ Development of an Expense Management Application

As part of a personal project, I designed and developed a mobile expense management application to centralize and analyze daily expenses through a mobile interface.

The project's objective was to experiment with different backend design and API architecture approaches, particularly in the .NET and Python ecosystems, within the same functional domain.

My responsibilities:
- Design and development of REST APIs (FastAPI then ASP.NET Core)
- PostgreSQL database modeling and management
- Database migration management
- Implementation of API security mechanisms (OAuth2)
- Data validation and application error management
- Implementation of API documentation via OpenAPI / Swagger
- Structuring the project into a modular monolithic architecture
- Setting up reproducible development environments using Docker
- Development of the iOS mobile application in SwiftUI

Technical Context:
- Application Development
- .NET / C# Development
- Entity Framework Core
- Modular Architecture
- Docker Containerization
- Unit Testing
.NET ASP.NET Core LINQ Entity Framework C#
Fives Syleps
.NET Lead Developer
LOGISTICS AND SUPPLY CHAIN
January 2023 - January 2025 (2 years)
Lorient, France
Fives Syleps designs and deploys complete solutions covering the entire supply chain — from inventory management to order picking and shipping — for industries of all sizes.

Following a WMS project, I gradually took on the technical and functional coordination of a team of 14 people (developers, testers, integrators).

Responsibilities:

- Technical reference and point of contact for architectural decisions (14 microservices, event-driven architecture, RabbitMQ)
- Design and specification of new features (breakdown, functional design, ticket creation)
- Training and skill development for junior developers
- Facilitation of Agile ceremonies (daily stand-ups, sprint planning, client product demos)
- Management of production deployments and environment monitoring (Docker, Azure DevOps, CI/CD)
- Comprehensive writing of user documentation
- Technical collaboration in English with the Norwegian solution provider

Technical Context:
- Project Management
- Agile Facilitation
- End-to-End
- Team Management
- Software Development
- .NET / C# Development
- Backend Development
- OOP Development
- WMS (Warehouse Management System)
- Industrial Logistics
- Event-Driven
- Entity Framework Core
- SQL Server
- RabbitMQ
- Azure DevOps
- Continuous Integration CI/CD
- Modular Architecture
- Microservices
- Clean Architecture
- Code Review
- Unit Testing
- DTO
- Visual Studio
- Docker Containerization
.NET Project Management Leadership Agile Methodology Azure DevOps
Fives Syleps
.NET Developer
LOGISTICS AND SUPPLY CHAIN
January 2020 - January 2023 (3 years)
Lorient, France
Fives Syleps designs and deploys complete solutions covering the entire supply chain — from inventory management to order picking and shipping — for industries of all sizes.

I joined the R&D team to contribute to the design and development of a warehouse management system (WMS) for controlling logistics flows and industrial automation systems, integrating a new industrial automation solution.

The project team consisted of:
- 10 .NET developers
- a technical architect
- a tester
- a domain manager
- a project manager
- the R&D manager

My responsibilities:
- Development of REST APIs and microservices in .NET
- Participation in the technical design of new features
- Analysis of business needs and writing of technical specifications
- Evolution and extension of existing platforms
- Corrective and evolutionary maintenance of applications
- Design and execution of unit tests and participation in integration tests
- Analysis and optimization of application performance and SQL queries
- Participation in code reviews and dissemination of best practices
- Contribution to CI/CD pipelines and continuous integration processes
- Integration in client environments
- Collaboration with business and client teams (FR/EN)
- Writing technical documentation
- User and developer training

Technical Context:
- Software Development
- .NET / C# Development
- Backend Development
- OOP Development
- WMS (Warehouse Management System)
- Industrial Logistics
- Event-Driven
- Entity Framework Core
- SQL Server
- RabbitMQ
- Azure DevOps
- Continuous Integration CI/CD
- Modular Architecture
- Microservices
- Clean Architecture
- Code Review
- Unit Testing
- DTO
- Visual Studio
- Docker Containerization
C# ASP.NET Entity Framework ASP.NET Core SQLServer

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Master's degree in Applied Mathematics
UBS (University of South Brittany)
2017
L'Université Bretagne Sud est une université publique implantée à Lorient, Vannes et Pontivy, formant chaque année 10 000 étudiants et reconnue pour ses expertises en cyber, industrie du futur, santé et sciences marines, adossées à 14 laboratoires de recherche et des plateformes technologiques de pointe. J’y ai suivi un Master en Mathématiques appliquées, combinant programmation logicielle et recherche en sciences mathématiques, notamment en traitement d’image et du signal. Cette formation m’a permis de développer une forte autonomie, une capacité de recherche et d’analyse, ainsi qu’une rigueur scientifique durable, tout en consolidant mon aptitude au travail en équipe et à l’apprentissage continu.

Master's degree in Applied Mathematics
University of South Brittany
2017
Software Development C# C/C++ Research and Development Python Programming .NET C# Team Spirit Teamwork Python Image Processing

Elen Hayot

Backend .NET C# Developer | Lead Developer

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