Freelancer profile translated to English.

Description

Are you looking for a developer capable of creating high-performance web applications that generate results?

Frontend engineer with 4 years of experience on applications with 50M+ daily users. I transform your ideas into high-performance and scalable web solutions.

How I can help you:

🚀 Performance & ROI

Application optimization (87% reduction in JS bundle size)
Migration of existing systems to modern technologies
A/B testing and SEO to improve conversions

⚡ Full-Stack Development

Frontend: React/Preact, TypeScript, Redux
Backend: Node.js, REST/GraphQL APIs
Integrations: Stripe, AI, blockchain, streaming

My added value:

✅ Enterprise experience (streaming platforms, e-commerce)

✅ 50% reduction in development time via modern architecture

✅ Automated testing and WCAG compliance

✅ Business vision: SEO/design/analytics collaboration

Types of projects:

Complex web platforms (e-commerce, SaaS)
Enterprise applications (dashboards, CRM)
High-performance sites optimized for conversion
API integrations and payment systems
Technical audits (performance, security)

Why me?I don't just code, I translate your business objectives into concrete technical solutions that scale.

Let's discuss your project!

Industry field of expertise

Languages

English
Native or bilingual
French
Native or bilingual
Dutch
Fluent

Workplace preferences

Can work on-site

Luxembourg (up to 50km)

Byborg Enterprises
Frontend Software Engineer
ENTERTAINMENT AND LEISURE
January 2024 - Today (2 years and 5 months)
Luxembourg
Development and optimization of a streaming platform (50M+ daily users, 15+ brands, hundreds of white-label sites) with live video streaming, payment systems, and interactive features.

**Web Performance**: Participation in the development of an MVP based on Preact, reducing bundle size by 87% and resolving critical performance issues through intelligent caching, lazy loading, streaming SSR, parallelization with multiple workers, and reactive state management.
**Monorepo Migration**: Consolidation of 3 existing codebases into a unified monorepo with React Server Components and a shared component library, reducing development efforts by 50% and achieving Google Core Web Vitals compliance.
**AI Integration**: Delivery of a standalone TypeScript library for AI content generation in an Nx monorepo for multiplatform deployment. Implementation of an intuitive multi-step wizard interface with real-time WebSocket communication, reducing development time for new platform integrations by 25%.
**Design system**: Construction of a component library with an advanced brand customization system across 5+ models; close collaboration with designers to ensure pixel-perfect and fully adaptive UI consistency.
**State Management**: Implementation of Redux Toolkit on 30+ slices, including complex payment flows and advanced saga workflows with concurrent access management and normalized data structures.
**Testing & Quality**: Implementation of advanced automated tests (Vitest, Playwright) including visual regression tests, API simulation, and static code analysis (ESLint, Madge)
Vitest Next.js TailwindCSS Node.js Playwright
Byborg Enterprises
Junior Frontend Software Engineer
April 2022 - January 2024 (1 year and 9 months)
Luxembourg
Gained hands-on experience in cross-browser development, testing, and debugging for Safari, Edge, Chrome, Firefox and other browsers
Implemented responsive layouts using Flexbox, Grid and media queries to achieve a consistent experience across devices
Leveraged CSS in JS libraries like styled-components for dynamic styling and implemented web animations using SVG and CSS
Monitored core web vital metrics, optimized assets loading and implemented responsive image techniques
Ensured code quality through code formatting tools, static analysis, and code reviews and authored Architectural Decision Records