Fullstack product engineering, TypeScript, NestJS, .NET, Cloud

Longlong Xu

Senior Fullstack Developer

Building and modernizing product platforms across frontend, backend, cloud infrastructure and automation. Over a decade of experience shipping business applications, payment systems, inventory tools and enterprise workflows.

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Featured work

Real projects with product and architecture depth.

Selected work across UI libraries, SSR content platforms and operational scheduling systems.

https://cresh-ui.com/

Cresh UI

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Open-source Vue 3 UI component library focused on reusable and maintainable interfaces.

Vue 3TypeScriptDesign SystemStorybooknpm packaging
https://france-histories.com/

France Histories

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Interactive platform exploring French history through visual storytelling, historical illustrations and chronological navigation.

Nuxt SSRSEOcontent architectureresponsive UX
https://rdv.lecerclevert.org/

Le Cercle Vert

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Appointment scheduling platform developed for an association managing home collection appointments.

scheduling systemresponsive UIproduction-ready platform
This portfolio intentionally consumes Cresh UI primitives for actions, tags, cards, status UI and reusable interface patterns.

Technical expertise

Fullstack coverage shaped by production products.

The strongest work happens where product UI, reliable APIs, data models, test strategy and deployment constraints are designed together.

Frontend

Vue 3NuxtAngularReactNext.jsTypeScriptTailwindRxJSjQueryKnockout.js

Backend

NestJSNode.jsExpress.jsPHPLaravelC#ASP.NET MVCPostgreSQLMSSQLREST APIs

Testing

PlaywrightCypressSelenium GridNightwatch.jsE2E testing

DevOps

AWSAzureDockerCloudflareCI/CDGitHub Actions

Expérience

Impact-oriented engineering across product surfaces.

A practical focus on architecture, scalability, UI systems and production applications.

Bonduelle · Nov 2024 - Present
Atelier256 · Nov 2024 - Jan 2025
Davidson Consulting · Apr 2024 - Jun 2024
Cresh · Apr 2020 - Jan 2024
Dispatcher-pro · Jun 2019 - Mar 2020
SLYX Technology · Mar 2017 - Jun 2019
Curioos · Jun 2015 - Sep 2016
ONprint · Mar 2014 - May 2015
Upsideo · Sep 2013 - Feb 2014

Nov 2024 - Present

Bonduelle

Fullstack Web Developer

Permanent contractLille, Hauts-de-France, France · Hybrid
  • Developing the core crop and field management platform used by farmers and coopératives.
  • Designing and maintaining product features across Angular 16 frontends and NestJS backend services.
  • Modeling complex agricultural business data with MSSQL Server and maintaining robust Playwright E2E coverage.
  • Contributing to cloud infrastructure operations on AWS for production application delivery.
Angular 16NestJSAWSMSSQL ServerPlaywrightORM

Education

Academic foundation in software engineering.

A technical education path combining project-based engineering, international study and early computer science foundations.

  1. EP

    Epitech - L’école de l’excellence informatique

    Master 2, Computer Programming

    2012 - 2014

    Paris, France

    • Advanced software engineering curriculum with project-based learning.
  2. BE

    Beijing Jiaotong University

    International academic exchange

    2012 - 2013

    Beijing, China

    • International study period focused on computer science and engineering culture.
  3. EP

    Epitech - L’école de l’excellence informatique

    Bachelor EPITECH

    2009 - 2012

    Paris, France

    • Bachelor-level software engineering foundation through practical programming projects.
  4. LY

    Lycée Maurice Ravel

    Baccalaureate

    Sep 2007 - Jun 2009

    Paris, France

    • Secondary education completed before specializing in software engineering.

Open source

Open-source projects with real product utility.

Selected public projects that demonstrate reusable component architecture, production Nuxt patterns, documentation discipline and deployment readiness.

Vue component library

Cresh UI

Open-source Vue 3 UI library focused on reusable components, typed APIs, design-system consistency and npm package distribution.

Vue 3TypeScriptViteDesign Systemnpm

Nuxt portfolio application

my-portfolio

This portfolio website, built as a production-grade Nuxt application with SSR, SEO metadata, Cloudflare Pages deployment and Cresh UI components.

Nuxt 4Vue 3TypeScriptTailwind CSSCloudflare Pages

Contact

Need a senior engineer for a serious product surface?

I can help with product platforms, Vue/Nuxt architecture, Angular applications, NestJS APIs, cloud operations and production-ready fullstack delivery. Always open to a good opportunity when the product and engineering challenges are serious.

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