Christoph (René) P.

Senior Frontend Developer & UX Engineer

Avatar placeholder
Freienbach, Switzerland

Experience

Apr 2025 - Jul 2025
4 months
Zürich, Switzerland

Senior Frontend Developer & UX Engineer

Swiss AI AG

  • Developed high-performance React/Next.js frontend architecture with Material-UI and Mapbox integration for AI data visualization with sub-2s loading times
  • Implemented complex 3D data visualizations with WebGL, WebAssembly and Three.js for improved user decision support systems and interactive data exploration
  • Optimized frontend performance through strategic code splitting, lazy loading and progressive web app features with Core Web Vitals following Google recommendations
  • Established a Storybook-based UI component library with 150+ reusable components and automated Jest/Playwright E2E tests for design system consistency
  • Implemented responsive design patterns with a mobile-first approach and cross-browser compatibility for optimal multi-device experience
Dec 2024 - Mar 2025
4 months
Berlin, Germany

Senior Frontend Developer

Blink Labs GmbH (Blinkist)

  • Modernized magazine frontend from Ruby on Rails to Astro.js with React, TypeScript and Next.js for a 40% performance increase and enhanced developer experience
  • Developed responsive UI components with Tailwind CSS based on the Figma design system with pixel-perfect implementation and accessibility standards (WCAG 2.1)
  • Optimized frontend performance for the Blinkist platform's millions-strong user base with advanced caching strategies and asset optimization
  • Integrated new frontend features for improved user experience and a 15% engagement rate increase through A/B testing and user feedback integration
Jan 2024 - Present
2 years
Ahrensburg, Germany

Senior Frontend Developer

HFG Handelsgesellschaft für Grundvermögen mbH

  • Migrated legacy jQuery applications to modern Vue.js 3 with TypeScript for better maintainability, type safety and a 60% code reduction
  • Implemented responsive portal interfaces with the Vue.js Composition API and Laravel API integration using RESTful services and real-time WebSocket communication
  • Developed automated frontend testing strategies with Vitest, Cypress and component testing for 95% code coverage and CI/CD integration
  • Optimized frontend build processes with Vite, Webpack and modern CI/CD pipeline integrations for fast refresh and hot module replacement
Jan 2023 - Dec 2024
2 years

Freelance Frontend Developer

Freelance

  • Schaltwerk Digital: e-commerce recipe shop with Nuxt.js (Vue.js) and strong TypeScript typing with server-side rendering
  • chargecloud GmbH: UI component redesign for an e-mobility platform with Figma-to-code workflows and performance optimizations
  • Michael Pichler Consulting: accessible Next.js website with Bootstrap, WCAG 2.1 AA compliance and SEO optimization
Aug 2018 - Jun 2023
4 years 11 months
Munich, Germany

Senior Frontend Developer & Tech Lead

VIMP GmbH

  • Led the frontend development of the SaaS video platform with Vue.js, GraphQL API integration and state management (Vuex/Pinia) for enterprise-scale applications
  • Developed responsive video player components with the HTML5 Video API, media source extensions and dashboard interfaces for international B2B clients
  • Implemented OAuth2/OIDC frontend authentication for Google/YouTube provider integrations with secure token management and session handling
  • Managed an international frontend team of 4 in modernizing the UI architecture from jQuery to a Vue.js single-page application
  • Established component-driven development with Storybook, design tokens and automated visual regression testing for a consistent user experience
May 2015 - Nov 2017
2 years 7 months
Munich, Germany

Frontend Developer & UX Engineer

limango GmbH

  • Developed e-commerce frontend features for a fashion platform with a user base of millions and complex product filtering systems
  • Optimized conversion funnels through A/B testing, performance improvements, and UX improvements, increasing the conversion rate by 25%
  • Implemented a responsive shopping cart and optimized the checkout process with payment gateway integration and error handling

Summary

16 years of frontend expertise in React, Vue.js and modern JavaScript frameworks like Next.js focusing on performance, SEO, conversion and user experience

  • Senior frontend developer with 16 years of experience
  • Expert knowledge in modern JavaScript frameworks such as React (Next.js) and Vue.js (Nuxt.js)
  • Specialist in responsive web development and progressive web apps (PWA)
  • Experience in API integration (REST/GraphQL) for seamless backend communication
  • Proven success stories: increased conversion rates by up to 25%
  • Ensuring optimal user experience through modern frontend architectures
  • Developing scalable frontend solutions for e-commerce, SaaS and media platforms
  • Managing platforms with millions of active users

Skills

Core Competencies

  • Javascript Frameworks: React, Next.js, Vue.js 3, Nuxt.js, Vanilla Js
  • Javascript/typescript: Es6+, Typescript, Node.js, Npm, Yarn, Pnpm, Bun, Module Bundlers
  • State Management: Zustand, Vuex, Pinia, Redux, Context Api, React Query, Swr
  • Ui/css Frameworks: Tailwind Css, Material-ui, Bootstrap, Styled Components, Css Modules, Sass/scss
  • Build Tools & Testing: Webpack, Vite, Rollup, Jest, Vitest, Cypress, Playwright, Testing Library
  • Api Integration: Rest Apis, Graphql, Apollo Client, Websocket, Server-sent Events
  • Performance & Seo: Core Web Vitals, Lighthouse Optimization, Pwa, Service Workers, Seo Best Practices, A11y

Frontend Project Highlights

  • High-performance Web Applications: React/next.js E-commerce Platform With 99.9% Uptime, Sub-2s Loading Times, Core Web Vitals Score >90
  • Vue.js 3 Real-time Dashboard: Websocket Integration, Typescript, Composition Api, Advanced Data Visualization
  • Progressive Web App: Offline Capabilities, Push Notifications, App-shell Architecture, 95+ Lighthouse Score
  • Ux & Conversion Optimization: 25% Increase In Conversion Rates Through Ux Improvements, A/b Testing And Performance Enhancements
  • Accessibility Compliance (Wcag 2.1 Aa): Screen Reader Support, Keyboard Navigation, Color Contrast Optimization
  • Mobile-first Responsive Design: Cross-device Compatibility, Touch-optimized Interfaces, Adaptive Performance
  • Component Libraries & Design Systems: Storybook-based Ui Component Library With 150+ Reusable Components, Design Tokens, Automated Visual Testing
  • Design System Implementation: Figma-to-code Automation, Consistent Brand Experience, Developer Documentation
  • Monorepo Architecture: Lerna, Nx, Component Versioning, Cross-project Reusability

Technical Frontend Expertise (Years Of Experience)

  • 16 Years: Javascript/typescript, Html5, Css3, Dom Manipulation, Browser Apis
  • 8 Years: Vue.js, Nuxt.js, Vue Router, Vuex/pinia, Single Page Applications, Component Architecture
  • 6 Years: React, Next.js, React Router, Redux, Material-ui, Tailwind Css, Server-side Rendering
  • 6 Years: Graphql, Apollo Client, Rest Api Integration, Websocket Implementation, Real-time Communication
  • 5 Years: Progressive Web Apps, Webgl, Webassembly, Service Workers, Performance Optimization
  • 3 Years: Three.js, D3.js, Chart.js, Advanced Data Visualization, Interactive Graphics

Tools & Development Environment

  • Ides & Editors: Vs Code, Webstorm, Sublime Text, Vim, Chrome Devtools, React Devtools
  • Version Control: Git, Github, Gitlab, Bitbucket, Advanced Branching Strategies, Code Reviews
  • Design & Prototyping: Figma, Adobe Xd, Sketch, Zeplin, Invision, Design-to-code Workflows
  • Performance Tools: Lighthouse, Web Vitals, Bundle Analyzer, Performance Profiling, Monitoring

Soft Skills & Business Skills

  • Leadership & Team: Tech Leadership, International Team Management, Best Practices, Code Reviews
  • Soft Skills: Communication, Teamwork, Problem Solving, Time Management, Agile Working
  • Business Skills: Stakeholder Management, Technical Consulting, Architecture Design, Cost Optimization
  • System Design: Scalability Planning, Performance Optimization, Database Architecture, Security Design

Frontend Industry Expertise

  • Fintech & Banking: Check24, Onpex, Petafuel – Secure Api Development, Pci-dss Compliance, Payment Processing Infrastructures
  • E-commerce & Retail: Limango, Schaltwerk, Netformic – Scalable Backend Systems, High-traffic Optimization, Performance Tuning
  • Automotive: Hella, Acrontum – Enterprise Devops, Container Orchestration, Compliance Systems
  • Saas & Media: Vimp, Swiss Ai, Blinkist – Microservices Architecture, Video Platform Scaling, Ai Integration

Languages

German
Native
English
Advanced
Spanish
Elementary

Education

Sep 2009 - Jul 2011

petaFuel GmbH

IT Specialist in Application Development · Freising, Germany

Certifications & licenses

Certified Security Professional

Swiss Cyber Institute Zurich

Need a freelancer? Find your match in seconds.
Try FRATCH GPT
More actions

Similar Freelancers

Discover other experts with similar qualifications and experience

Fahrettin K.
Fahrettin K.

Senior Frontend Engineer

View Profile
Jack S.
Jack S.

Freelance - Fullstack Engineer

View Profile
Veit B.
Veit B.

Senior Full-Stack Developer

View Profile
Mathias D.
Mathias D.

Independent contractor

View Profile
Timur Y.
Timur Y.

Lead Frontend Developer | Fullstack Developer

View Profile
Przemyslaw T.
Przemyslaw T.

Frontend Vue.js Developer

View Profile
Dennis S.
Dennis S.

Lead Full Stack

View Profile
Carlos M.
Carlos M.

Migration Zend Framework 2 /Laminas

View Profile
Jan K.
Jan K.

Web Developer

View Profile
Igor P.
Igor P.

Senior Frontend Developer

View Profile
Rüdiger S.
Rüdiger S.

Full-Stack Software Engineer / Consultant for Digitalization

View Profile
Daniel R.
Daniel R.

Software Engineer

View Profile
Peter B.
Peter B.

Elgiganten DK & SE - Relaunch of the E-Commerce Portal as an SPA

View Profile
Robin O.
Robin O.

Co-Founder & AI Solutions Architect

View Profile
Robin S.
Robin S.

Senior Cloud & Backend Engineer

View Profile
Peter A.
Peter A.

IT Consultant

View Profile
David M.
David M.

Senior Technical Consultant

View Profile
Martin S.
Martin S.

TallyUp

View Profile
Björn K.
Björn K.

Senior Developer

View Profile
Lucas J.
Lucas J.

Full-Stack Developer (WordPress, React.js)

View Profile
Fabian D.
Fabian D.

Volunteer Examiner for IT Apprenticeships

View Profile
Mathis D.
Mathis D.

Senior Web/Frontend Developer

View Profile
Frank M.
Frank M.

Web3 accelerator participant co-founder

View Profile
Lukas G.
Lukas G.

Self employed consultant and Full-Stack UX Engineer and Architect

View Profile
Oleg O.
Oleg O.

Senior Software Developer C#, ASP.NET Core (.NET 6–9)

View Profile
Niklas G.
Niklas G.

Senior Full Stack Developer

View Profile
Patrycja B.
Patrycja B.

Freelance Frontend Developer

View Profile
Volker A.
Volker A.

Fullstack Developer

View Profile
Manuel M.
Manuel M.

Software Developer | Agile Coach | Digitalization Expert

View Profile
Nico M.
Nico M.

Freelance Fullstack Developer

View Profile