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Geoffrey DalfinGD

Geoffrey Dalfin

Back-end Developer .Net Core

€580/day
2 projects
Aix-en-Provence, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Geoffrey

As a passionate Fullstack developer, I have gained solid experience within companies and startups, which has allowed me to develop versatile expertise in the field of technology.

Technical Skills 💻

- Backend: I master .Net, Node.js, and Java technologies to create robust server-side solutions.
- Frontend: I have proven experience in development with React.js to deliver modern and responsive user interfaces.
- Mobile: I use React Native to design intuitive and high-performance mobile applications.

Architecture and Design 🔧

I have experience in Microservices and Hexagonal architectures, and I apply TDD (Test-Driven Development) and DDD (Domain-Driven Design) in a targeted manner to ensure quality solutions. I apply SOLID, DRY (Don't Repeat Yourself), and KISS (Keep It Simple, Stupid) principles to ensure elegant and scalable solutions.

If you are looking for a developer to bring your projects to life, do not hesitate to contact me. I would be delighted to discuss how I can contribute to your success.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Aix-en-Provence (up to 50km), Marseille (up to 50km), Lyon (up to 50km), Paris (up to 50km)

Experience

  • Betclic Group
    Freelance Software Engineer
    SPORTS
    December 2023 - Today (2 years and 6 months)
    Betclic is a French online betting company, offering sports betting, poker, casino, and horse racing services.
    As part of the transformation of the offering at Betclic, I was tasked with the following missions:
    • Migration of the legacy monolithic service to the new .NET Core microservices architecture.
    • Design and implementation of architectural redesign needs on the services side as well as the BFF part.
    • Application of the "You Build It, You Run It." principle in effect at Betclic, ensuring total responsibility for the application lifecycles, from their construction to their production operation.
    C# Terraform CI/CD Architecture Cloud AWS design pattern SOLID gRPC Confluent Kafka Liquibase MongoDB Atlas search Jenkins/Sonar ASP.NET Core
  • Prestataire dans l'éducation
    Full-Stack Developer
    EDUCATION AND E-LEARNING
    July 2023 - September 2023 (3 months)
    Aix-en-Provence, France
    Development of a mobile application in the field of education for children, enabling the learning of language and phoneme-grapheme skills.
    - Design/Development of the Mobile application (React Native).
    - Design/Development of the organizer application (React.js).
    - A hexagonal architecture was implemented on the front-end side to facilitate long-term management and improve scalability.
    - Implementation of an online/offline system based on replication and synchronization with MongoDB Atlas/App Service and Realm.
    React.js React Native Hexagonal Architecture MongoDB Realm
  • Symbotic
    Freelance Software Engineer .Net
    LOGISTICS AND SUPPLY CHAIN
    October 2022 - June 2023 (8 months)
    Boston, United States
    Symbotic is an American company developing proprietary and innovative robotics and software to provide an advanced automation solution to make the supply chain faster, more efficient, and more profitable.
    - Definition of architectural requirements for new concepts.
    - Refactoring of part of their Legacy (.NET) services.
    - Optimization of concurrent operations management and elimination of bottlenecks.
    - Design/Development for architectural redesign needs on the services side (Microservices Architecture .Net Core).
    - Design/Development of new UI components for React.js.
    ASP.NET Core Microservices Clean Architecture C# .net core React.js

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Education

  • Master in Computer Engineering
    EPSI
    2019

Skill set (34)

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