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Valentin HarnyVH

Valentin Harny

Supermalter

Fullstack Developer | Node Go React Vue Angular

€480/day
2 projects
Lille, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Valentin

Experienced Full-Stack Developer, I specialize in developing backend applications inNode.jsand (Go) **GoLang**, and responsive interfaces in **React, Vue, and Angular**. My background has allowed me to master the entire delivery chain, from writing code (TDD/BDD/Clean Code) to cloud orchestration on **Kubernetes (GCP, AWS)**.

A technical jack-of-all-trades, I define myself by my versatility and my ability to quickly deliver business value within agile teams. Passionate about computing since adolescence, I cultivate this vocation daily to design quality, performant, and scalable solutions driven by a strong Software Craftsmanship culture.
  • French

    Native or bilingual

  • English

    Fluent

Can work on-site
Lille (up to 30km), Paris (up to 10km), Amiens (up to 30km), Boulogne-sur-Mer (up to 30km), Dunkerque (up to 30km)

Experience

  • ADEO Services
    Full Stack Developer
    RETAIL (LARGE RETAILERS)
    November 2023 - Today (2 years and 8 months)
    Ronchin, France
    Contribution to the development of Turbine, ADEO group's internal tool for Kubernetes deployment.

    → My missions
    • Development of features for a tool managing 8000+ environments (Dev to Prod) and used by 1300+ monthly users.
    • Technical design and implementation of a 15 microservice architecture in Go and NestJS, ensuring scalability and deployment on 90 multi-cloud clusters (GCP & Azure).
    • Creation of a CLI, GitHub Actions, and a Terraform Provider to automate the integration of Turbine into user teams' workflows.
    • Redesign and optimization of complex web interfaces (Vue & Angular) to simplify daily Kubernetes deployments.
    • Implementation of security and observability components: integration of Vault (secrets), DataDog (monitoring), and ServiceNow (compliance).
    • Guarantee of software quality through an E2E Cypress testing strategy, unit tests, code reviews, and comprehensive technical documentation.
    • Technical support for users and RUN management to ensure platform stability and integrate field feedback.
    → Technical Stack
    Go (Golang), NestJS, Vue.js, Angular, MongoDB, PostgreSQL, Redis, Kubernetes, Terraform, GCP, Azure, GitHub Actions, DataDog, Vault, Cypress
    NestJs Vue.js GO Kubernetes Angular
  • Brik.com
    Full Stack Developer
    REAL ESTATE
    September 2022 - November 2023 (1 year and 2 months)
    Lille, France
    Design of an innovative real estate investment platform integrating a property management tool, a marketplace, and Web3.

    → My missions
    • Architecture and development of web interfaces using React and Next.js, focused on performance and user experience (collaboration with product and design teams).
    • Optimization of the API layer (Node.js/Express/PostgreSQL) and latency reduction through a Redis caching strategy.
    • Development of an electronic signature module and a document management system for automating real estate processes.
    • Implementation of a media processing microservice: dynamic asset optimization and watermark application for real estate data protection.
    • Design of a technical SEO strategy (Server-Side Rendering) which significantly increased the marketplace's organic visibility.
    • Containerization of services with Docker and deployment on AWS Cloud infrastructure.
    → Technical Stack
    Node.js, Express, PostgreSQL, Redis, React, Next.js, AWS Lambda, Docker, AWS
    Node.js Next.js React.js AWS PostgreSQL
  • AXA
    Software Engineer
    BANKING AND INSURANCE
    September 2020 - August 2022 (1 year and 11 months)
    Wasquehal, France
    Modernization of the digital ecosystem for the IARD Enterprise domain and migration of critical legacy components.

    → My missions
    • Active contribution to the domain's frontend migration: transition from legacy interfaces (Windows Forms and AngularJS) to a modern React architecture.
    • Rigorous implementation of TDD and BDD methodologies to ensure development reliability (target 100% test coverage).
    • Application of Clean Architecture and Software Craftsmanship principles to ensure long-term application maintainability.

    • Development of backend features in C# (ASP.NET) and management of deployment pipelines via Azure DevOps.
    • Participation in the group's InnerSource effort by developing reusable React components, shared among AXA's various teams.
    • Evolution within an Agile team: involvement in grooming sessions and 3 Amigos workshops in close collaboration with POs, Business Analysts, and QAs to validate acceptance criteria.

    → Technical Stack
    React, AngularJS, ASP.NET (C#), Azure DevOps
    React.js ASP.NET C# AngularJS Azure DevOps

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Education

  • Expert in Information Technology and Information Systems, Computer Science
    EPSI
    2022
    Expert en Informatique et Système d'Information, Informatique
  • Application Designer Developer, Computer Science
    EPSI
    2020
    Concepteur Développeur d'Applications, Informatique

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