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Nicola LonziNL

Nicola Lonzi

Supermalter

Senior Fullstack Developer - Expert Angular

€450/day
62 projects
Paris, FR
8-15 years

Average response time: 4 hours

Freelancer profile translated to English.
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About Nicola

Senior Angular Expert • Frontend Architecture • Performance & Scalability

Senior Fullstack Developer with 15+ years of experience, specializing in Angular and complex Frontend architectures. I can also work on the Backend and API side.

I help companies design, stabilize, and evolve their critical Angular applications: performance, technical debt, scalable architecture, and code quality.

**I primarily intervene on**:
  • Refactoring and architecture of Angular applications
  • Migration from legacy Angular to recent versions
  • Performance optimization & Core Web Vitals
  • Setting up Nx monorepo and design systems
  • Structuring state management (Signals, NgRx, RxJS)
  • SSR / Angular Universal
  • Frontend industrialization & software quality
  • Coaching and skill development for teams


**I generally work in contexts where**:
  • the application becomes difficult to maintain
  • performance degrades
  • the frontend team slows down
  • technical debt blocks evolution
  • a sustainable architecture needs to be structured


**Main Stack**:


Angular 22, TypeScript, Nx, Signals, NgRx, RxJS, Jest, Playwright, Node.js, NestJS, PostgreSQL.

**Quality & Performance**:


I pay particular attention to:
  • clear separation of responsibilities
  • long-term maintainability
  • runtime performance
  • developer experience
  • stability of production releases
  • AI & modern tools
I also integrate modern AI tools when they bring real product or productivity value:
LLMs, AI integrations, Claude AI, Cursor, GitHub Copilot, n8n workflows.

The objective remains the same:
deliver robust, maintainable, and efficient applications for both teams and users.
  • French

    Fluent

  • English

    Fluent

  • Italian

    Native or bilingual

  • German

    Conversational

  • Portuguese

    Conversational

Remote only
Primarily works remotely

Experience

  • ADIAL
    Malt logoOn Malt
    Frontend Angular and Web Integration - 3
    SOFTWARE PUBLISHING
    October 2025 - December 2025 (3 months)
    Refactoring App PART - 3

    Final part of the refactoring of the two Angular Frontend applications for Adial process management. In particular, this last phase of the mission concerned the stabilization of NgRx stores, optimization of Nx pipelines, cache optimization and script parallelization, identification and resolution of bundle weaknesses, security issues, and optimization. Additionally, there was a focus on training and transferring skills to other team members to ensure continuity in my absence. Last point: full coverage of unit, integration, and e2e tests, as well as optimizing the use of reactive programming and appropriate patterns at each application level.
    Nx Angular Developer NgRx Angular Jest
  • ADIAL
    Malt logoOn Malt
    Frontend Angular and Web Integration - 2
    SOFTWARE PUBLISHING
    July 2025 - October 2025 (3 months)
    Refactoring App PART - 2

    During this project, as Lead Frontend Dev, I guided the refactoring of two Angular applications using Nx for monorepo management. I created shared libraries to promote code reuse and improve application structure. The use of NgRx allowed for refactoring business logic, while Signals were integrated to manage templates in zoneless mode.

    I also introduced patterns and best practices at all application levels, which helped improve code maintainability and readability. Unit, integration, and end-to-end tests were implemented, using Jest and Cypress to ensure code quality.

    Finally, I automated tasks with Husky for pre-commit and pre-push hooks, which optimized the workflow. I also took charge of upskilling junior developers, guiding them in adopting these new practices.
    Nx Jest Angular Developer NgRx Responsive Integration
  • ADIAL
    Malt logoOn Malt
    Lead Frontend Developer - Expert Angular, Ngrx, Nx
    SOFTWARE PUBLISHING
    April 2025 - July 2025 (3 months)
    During this project, as Lead Frontend Dev, I refactored two Angular applications using Nx for monorepo management. I created shared libraries to promote code reuse and improve application structure. The use of NgRx allowed for refactoring business logic, while Signals were integrated to manage templates in zoneless mode.

    I also introduced patterns and best practices at all application levels, which helped improve code maintainability and readability. Unit, integration, and end-to-end tests were implemented, using Jest and Cypress to ensure code quality.

    Finally, I automated tasks with Husky for pre-commit and pre-push hooks, which optimized the workflow. I also took charge of upskilling junior developers, guiding them in adopting these new practices.
    NgRx Nx Angular Frontend Development Training

Reviews

5.0

Out of 38 ratings

J

Jerome

Mon Ami Poto

Reviewed on 2/22/2024

N/A. Very professional, the work is of high quality, respecting deadlines.
Francesco MariaFM

Francesco Maria

MeshUp Education

Reviewed on 12/2/2019

Nicola is an excellent front-end developer, specializing in Angular. He created the graphical interface, which was unusual and based on "graph", as written in the specifications. Nicola integrated well with our multidisciplinary team. He started the mission well without misunderstandings and respected the negotiated time constraints. He managed the tickets of our agile development process with precision and autonomy. He responded well to our requests and the dynamism of our company.

Recommendations

Rupert SchiesslRS
FU
Jonathan-David S.JS
Rupert Schiessl and 2 other people have recommended Nicola

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Education

  • Research Doctorate
    Phd, University of Florence, Computer Engineering
    2011

Skill set

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