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coolbeatz71/README.md

Hi, I'm Jean-Vincent 👋

Accomplished Senior Software Engineer with 8+ years of experience in full-stack development. Proficient in JavaScript, ReactJS, NodeJS, TypeScript, C#/.NET, PHP/Laravel, Flutter, DevOps, and Cloud Platforms. Strong leadership in cross-functional teams, Passionate about clean architecture, developer experience, and delivering high-quality code.

  • 🚀 Specialized in building component libraries, micro-frontends, and developer tooling that ship fast and scale well.
  • 💡 Proven track record: 30-45% performance gains, 99.9% uptime in payment systems, and mentoring 5+ developers.

🎯 What I Do Best

Frontend Architecture

  • Built shared component libraries with Storybook that power multiple production apps.
  • Reduced page load times by 30% through performance optimization (OpenTelemetry + Datadog monitoring).
  • Migrated 15,000+ LOC legacy codebases to TypeScript, cutting runtime bugs by 40%.
  • Architected micro-frontends with clean architecture principles, improving code maintainability by 35%.

Backend & Infrastructure

  • Optimized .NET APIs with async programming and DI, slashing response times by 40%.
  • Integrated Kafka event pipelines, reducing API latency by 45% and handling 3× traffic spikes.
  • Built Node.js/PostgreSQL backends processing thousands of daily transactions with 99.9% success rates.
  • Designed vertical slice architecture and modular monoliths, accelerating feature delivery by 30%

DevOps & Quality

  • Set up CI/CD pipelines with visual regression tests, cutting post-release hotfixes by 70%.
  • Authored reusable testing foundations (Jest, Cypress) that boosted team productivity by 30%.
  • Implemented security hardening (CSP, input sanitization), reducing vulnerabilities by 80%.

💻 Tech Stack

Frontend

React Next.js TypeScript Angular

Backend & APIs

Node.js Express.js .NET C# PHP Laravel

Databases

Postgres MongoDB CouchBase

DevOps & Cloud

Docker Kubernetes Google Cloud Kafka CI/CD

Testing & Quality

Jest Cypress Vitest Testing Library Jasmine Karma PHPUnit xUnit

Mobile

Flutter React Native

💡 How I Build

  • Philosophy: "Ship code that's readable, maintainable, and measurably fast."
  • Strengths:
    • Clean Architecture & Domain-Driven Design
    • Data-driven optimization (OpenTelemetry, Datadog, NewRelic)
    • Test-first development with 100% coverage on critical paths
    • Cross-functional leadership and mentoring

🌐 Let's Connect

LinkedIn Portfolio Medium

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  1. coolest-dark coolest-dark Public template

    The coolest dark theme for Dart and Flutter based on One Dark Pro and Bear Theme

    7

  2. eshop-modular-monolith eshop-modular-monolith Public

    A modular monolith application for learning advanced .NET architecture using Asp.Net, Web API, PostgreSQL, Redis, RabbitMQ, Keycloak, Seq, Docker, MassTransit, MediatR

    C#

  3. kinix_backend kinix_backend Public

    A RESTful API for a video container manager application

    TypeScript

  4. design-pattern-csharp design-pattern-csharp Public

    Just a playground for me to learn design patterns and best OOP practices and principles with C#

    C#

  5. validatorjs/validator.js validatorjs/validator.js Public

    String validation

    JavaScript 23.7k 2.4k

  6. 116-mobile 116-mobile Public

    116 is a bold digital platform that promotes music and hip-hop culture in DR and beyond. Through articles, video shows, and exclusive behind-the-scenes content, it connects fans with artists, highl…

    Dart