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William FinzyWF

William Finzy

Front-End Developer | Angular

€400/day
Rouen, FR
3-7 years
Angular
Front-End Development
TypeScript
RxJS
Angular Developer

Average response time: 1 hour

Freelancer profile translated to English.
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About William

Front-end developer | Angular | TypeScript | RxJS


Does your application lack performance or scalability, or do you have a large legacy to manage?

- I step in to develop fast, maintainable Angular interfaces capable of supporting thousands of users in production.

- I manage technical debt through refactoring and progressive migrations, ensuring the same quality of service for your application portfolio.

👨🏻‍💻 Front-End Developer with +4 years of experience, I create custom web portals, robust business applications, and complex technical migrations.

- My specialty: Angular (v12 to v21), TypeScript, RxJs.

➡ I have developed network automation portals used by 1500+ international operators, managed large-scale technical debt, and delivered an MVP from scratch in 4 months.

Recent Projects


Société Générale- Development of several web portals to automate network operations (Angular, 3 years)

Indarra- Editorial website for a Crédit Agricole endowment fund (Angular, 6 months)

Foyer AFJ- Management application for a housing center (Angular, 6 months)

Technical Stack

Front-End: Angular • TypeScript • RxJS
**Design**: TailwindCSS • Material • PrimeNG (depending on projects)
**Software Quality and Testing**: Prettier • ESLint • Vitest • Karma / Jasmine
**Infrastructure and Deployment**: Docker • Jenkins • AWS

Modalities

- Available immediately
- In Paris or Rouen
- French or English

→ Contact me for an initial discussion, **response within 1 hour**.
Digital and IT Services
Software Publishing
Consulting and Audits
Digital Business Models

  • French

    Native or bilingual

  • English

    Fluent

  • Italian

    Conversational

Can work on-site
Rouen (up to 10km), Paris (up to 30km), Caen (up to 10km), Lille (up to 10km)

Experience

  • Société Générale
    Angular Developer
    BANKING AND INSURANCE
    August 2022 - September 2025 (3 years)
    Fontenay-sous-Bois, France
    FRONT-END DEVELOPER @ SOCIÉTÉ GÉNÉRALE (via Capgemini)
    January 2022 - January 2025 (3 years) • Paris/Hybrid

    🎯 CONTEXT
    Development of critical applications for network and infrastructure management within the Global Technology Services department.
    500+ internal users (network engineers, infrastructure teams).

    🛠️ KEY ACHIEVEMENTS

    - From-scratch development of a network configuration management application
    (ACI - Application Centric Infrastructure)
    → Modular and scalable Angular architecture
    → Close collaboration with network teams to define needs

    - Network route opening and VM provisioning application
    → Complex reactive Angular forms: FormArrays, dozens of fields
    → Cross-field and conditional validation adapted to business rules
    → Refactoring: extraction of reusable components, improvement
    of stability and reduction of code duplication

    - Contribution to the Red Button project (DORA compliance) in React
    → Development in a strict regulatory context (operational resilience)
    → High standards of documentation, traceability, and quality assurance

    - Progressive technical migration Angular v12 → v17 across all projects
    → Management of compatibilities between third-party libraries
    → Upgrade without service interruption
    → Improved maintainability of the legacy codebase

    - Continuous evolutionary maintenance and technical support for applications in production

    💻 TECHNICAL STACK
    Angular 12-17 • TypeScript • RxJS • Material Design • Reactive Forms
    React • Jenkins (CI/CD) • Git/GitHub Enterprise
    Jasmine/Karma • SonarQube • JIRA • SCRUM
    TypeScript Angular RxJS Angular Material Angular 16
  • Association Foyer Jorbalan
    Fullstack Angular / Node.js Developer
    CIVIC AND SOCIAL ORGANIZATIONS
    March 2021 - April 2022 (1 year and 1 month)
    Issy-les-Moulineaux, France
    🎯 CONTEXT
    Skills sponsorship mission within an internal lab (Capgemini).
    Development of a management application for a shelter housing
    women in vulnerable situations. Digitization of administrative and
    legal processes for the director and the shelter team. Sensitive data management. Agile team of variable size
    (3-8 developers), including interns and juniors developing their skills.

    🛠️ KEY ACHIEVEMENTS

    - Full Stack development of the management application
    → Angular 12/14 front-end: complex forms with sensitive data management
    → Node.js/Express back-end + MongoDB (Mongoose)
    → Data anonymization for test environments (GDPR compliance and confidentiality)

    - UX workshops and co-creation with the director (5+ sessions)
    → Innovative co-creation method: PowerPoint drafts via video call allowing
    to get straight to the point and avoid unnecessary iterations
    → Gathering field business needs and translating them into features
    → Iterative delivery of new features according to the shelter's priorities

    - Statistics dashboards and management support
    → Visualizations with Chart.js: occupancy rate, profiles, and geographical origins
    → Reporting for management and support for grant applications
    → Concrete help in obtaining funding for the shelter

    - AWS infrastructure and automation
    → Infrastructure as Code with Terraform for the staging environment
    → From-scratch creation of IaC code based on manual infra documentation
    → On-the-fly environment setup/teardown (cost optimization)

    - Testing and quality
    → E2E tests with Capgemini internal tool (based on Selenium)

    💻 TECHNICAL STACK
    Angular 12/14 • TypeScript • Reactive Forms • Chart.js
    Node.js • Express • MongoDB • Mongoose
    AWS • Terraform • Selenium (E2E tests) • Git • SCRUM
    Terraform TypeScript Angular Angular 12 Node.js
  • Fonds Indarra
    Angular & AWS DevOps Developer
    BANKING AND INSURANCE
    March 2021 - August 2022 (1 year and 5 months)
    Issy-les-Moulineaux, France
    🎯 CONTEXT
    From-scratch development of the institutional website for Indarra, a territorial
    endowment fund of Crédit Agricole supporting projects in the Basque Country.
    Modern JAMStack architecture (Angular + Scully) with a headless backend (Strapi).
    Coordination of a variable-sized team (3-7 developers) using SCRUM methodology.

    🛠️ KEY ACHIEVEMENTS

    - Development of the JAMStack editorial site and headless backend
    → Front-end: Angular + Scully (static generation for SEO and performance)
    → Back-end: Strapi (headless CMS) + PostgreSQL + Express
    → Collaboration with designer for visual identity integration

    - AWS infrastructure and optimized automated deployment
    → Infrastructure as Code: CloudFormation for all environments (dev, preprod, prod)
    → Custom Strapi webhook → AWS CodePipeline with intelligent optimization:
    conditional triggering (cron 3x/day) instead of rebuilding on each publication,
    saving AWS resources and reducing costs

    - Technical coordination and project management
    → Management of a variable-sized team (3-7 developers) in an agile context
    → Gathering and integrating user feedback for final touches (v0 → v1)
    → Organization of SCRUM sprints and progressive delivery with reporting to project managers

    💻 TECHNICAL STACK
    Angular • Scully (JAMStack) • TypeScript • Strapi (Headless CMS)
    PostgreSQL • Express • AWS • CloudFormation • CodePipeline
    Git • SCRUM
    Amazon Web Services TypeScript Angular Strapi Scully

Recommendations

Abdesslem AmriAA
Arnaud G.AG
Abdesslem Amri and 1 other person have recommended William

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Education

  • Master in Web Application Development (RNCP equivalent BAC+5)
    La Passerelle des Métiers du Numérique
    2022
    ● Formation en alternance : 3 sem entreprise / 1 sem école ● Java / Frameworks JavaScript ● Gestion de projet, Agilité, Tests, Qualité de Code, DevOps
  • Chemical Engineer
    ESCOM Chimie
    2018
    Spécialisations en Chimie du Vivant et en Marketing

Skill set

Web Application Development
Git
rxjs
Angular Material
PrimeNG
JavaScript
Git/Github
SCSS
Front End Interface Development

Categories