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Quentin MartinezQM

Quentin Martinez

.NET C# Developer | ASP.NET | Blazor | Azure

€420/day
4 projects
Rennes, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Quentin

Looking for an experienced .NET developer?
Tired of unreliable software?
You've come to the right place. 👇

I am a developer specializing in .NET development with over 5 years of experience.

I have collaborated with large groups and startups such as:
- La Financière d'Orion (Investment & Life Insurance)
- ITGA (Environmental diagnostics & analysis)
- Oberthur Fiduciaire (Industry & Secure printing)
- The Stadium (sports events)

My skills include:
• Design and development of features meeting specific business needs.
• Writing detailed technical specifications and analyzing the impact on IT architecture.
• Backend development using .NET (C#).
• Frontend development with React and Flutter.
• Database setup and management (SQL Server, PostgreSQL, MongoDb).
• CI/CD automation to ensure smooth deployments and testing.
• Software architecture, including Clean Architecture and other patterns.
• Unit and integration tests to ensure code robustness and quality.
• Application migration to the cloud.
• Sharing best development practices (TDD, BDD)

I have also developed several 3 apps and 1 SaaS, including 2 with Flutter, 1 with React Native, and 1 in React.js.

Some key missions:
• Development of an application and its backend for real estate diagnostics
• On-Premise to Cloud Migration
• Design and development of a mass PDF document generation solution.

I also place great importance on software quality and customer satisfaction.
In the event that a bug is introduced, I commit to fixing it free of charge.

Do you have a project?
Contact me on the platform

Mastered Technologies:
• C#, .NET Core, ASP.NET
• Entity Framework, LINQ
• SQL Server, PostgreSQL
• Flutter, React Native, React.js
• AWS, Azure, Docker, Kubernetes
• Git
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Rennes (up to 50km), Paris (up to 50km), Nantes (up to 50km), Lyon (up to 50km), Toulouse (up to 50km)

Experience

  • Betclic
    Backend Developer
    ENTERTAINMENT AND LEISURE
    December 2024 - Today (1 year and 6 months)
    Bordeaux, France
    Betclic, a major player in online betting, offers sports betting, poker, casino, and horse racing betting services.

    The Turf team focuses on the development and improvement of products related to horse racing betting.

    As part of my assignment, I joined the Turf team with the main objective of improving the software architecture and designing a new feature for Jockey recommendations.

    Team Structure:
    • Agile Methodology (Scrum), 2-week sprints, Scrum ceremonies (Daily, Planning, Retro)
    • Team of 8 people (1 Manager, 5 Developers, 1 QA, 2 POs)

    As a .NET developer, my responsibilities included:
    • Backend Development:
    o Creation and evolution of REST APIs in C#/.NET Core
    o Implementation of a new feature involving several microservices. (Early refund for non-starters)
    o Problem-solving for idempotency and concurrent execution in a distributed system.
    o Deployment in dev/staging/prod and bug fixes.
    o Addition of unit tests, integration tests, code reviews, etc...
    • Architecture and Design:
    o Analysis and advice regarding hexagonal/Onion architecture
    o Study and DATA design of a new feature for jockey recommendations.

    Results:
    - Architecture Improvement
    - Data Design Completed

    Technical Context:
    C# · .NET Core · REST API · Azure · AWS SNS · Clean Architecture · Kong Gateway ·
    Terraform · Unit Tests · DevOps · CI/CD · Docker · SQL Server · Visual Studio
    ASP.NET .net core Docker AWS C#
  • La Financière d'Orion
    .NET Developer
    BANKING AND INSURANCE
    November 2022 - June 2024 (1 year and 8 months)
    Nantes, France
    La Financière d'Orion aims to support its institutional and private clients in investing in the markets. The company has several thousand clients and manages 3.6 billion euros in assets with a network of 430 financial advisors.

    As part of my permanent contract with FORTIL, I joined the development team with the objective of developing the Canopia asset management application.

    Team Structure:
    Kanban Methodology, Daily stand-ups, team of 10 people (1 Lead Dev, 5 Devs, 2 POs)

    As a .NET developer, my responsibilities included:

    · .NET / ASP.NET Development (Parser, REST API, integration)
    · Implementation of CI/CD pipelines (build/test/deploy)
    · Migration and design of architectures for scaling on AWS
    · Execution of several PoCs and migration to AWS Lambda
    · Code refactoring, addition of unit tests, etc..
    · Quality control of business features
    · Creation & Evolution of investment reports in PDF format

    Technical Context:
    - C# Development
    - ASP.NET Core Development
    - Web Application Development
    - Serverless AWS Lambda Development
    - REST API Creation
    - Cloud Migration
    - Modular Architecture
    - Clean Architecture
    - Unit Testing
    - C#
    - DTO
    - Design System

    C# .NET Microsoft Azure ASP.NET Core Serverless AWS Lambda Azure DevOps AWS S3 SSIS API ASP.NET .NET C# Developer AWS Expert .NET expert Azure Expert
  • ITGA
    .NET Developer
    ENVIRONMENTAL
    February 2021 - November 2022 (1 year and 9 months)
    Rennes, France
    ITGA is a leader in environmental and health analysis. The company has 1000 employees and a network of 13 laboratories in Europe.
    ITGA specializes in complex analyses, particularly for asbestos, lead, and air quality.

    As part of my permanent contract with FORTIL, I joined the development team and participated in the development of the DiaginBox field application.

    Team Structure:
    Agile Scrum Methodology, team of 6 people (4 devs, 1 scrum master, 1 PO)

    As a .NET & Flutter developer, my responsibilities included:

    · .NET backend development (C# REST API)
    · Cross-platform development (Android & Web) with Flutter and unit tests.
    · Design & development of offline/online synchronization
    · Code reviews performed
    · Critical merge and deployment
    · Training, monitoring, prevention, and correction of application vulnerabilities
    · Integration with Azure Blob Storage
    · Implementation of CI/CD pipelines (build/test/deploy)

    More details about this experience: https://qmartinez.com/projects/diaginbox.html

    Technical Context:
    C# Development
    .NET Core Development
    Flutter Development
    Microservices Development

    Development with Docker, Kubernetes, Azure, Gitlab, SonarQube, MongoDB, Clean Code, TDD, DevOps
    ASP.NET MVC .NET Continuous Integration ASP.NET Core Flutter Docker Kubernetes Gitlab MongoDB TDD Clean Code Microsoft Azure Microservices Back-End Development azure expert C# Backend Developer .NET Developer .NET expert C#

Reviews

5.0

Out of 1 rating

B

Brieuc

La Financière d'Orion

Reviewed on 2/22/2023

Recommendations

Lilian AlvarezLA
CP
VC
Lilian Alvarez and 2 other people have recommended Quentin

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Education

  • Designer Developer
    ENI École Informatique
    2018
    BAC +4 -Titre RNCP Niv. II
  • BTS SIO (Information Technology Solutions for Organizations)
    AFTEC
    2018
    Effectué en alternance avec Oberthur Fiduciaire

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