03.09.2026 aktualisiert

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Premiumkunde
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Senior React Specialist & Frontend Architect

Berlin, Deutschland
Nur Remote
IHK Medienfachwirt
Berlin, Deutschland
Nur Remote
IHK Medienfachwirt

Profilanlagen

cv-manuelbieh-2025-08-11.pdf
cv-manuelbieh-2025-12-02.pdf
manuel-bieh_cv_february-2026.pdf
cv-manuelbieh-en-2026-08.pdf

Skills

JavaScriptAPIsArchitekturTest AutomationSoftware QualityDatenmanagementNode.jsLeistungssteigerungQualitätsmanagementNext.jsNachhaltigkeitTypeScriptTestenBundlerReact.jsBackendWebpackBuild-ToolsFront EndReact Redux
React Entwicklung
Umfassende Expertise in React mit über 10 Jahren Erfahrung in verschiedenen Projekten. Spezialisierung auf Performance-Optimierung, moderne Hooks-Implementierung und Architektur komplexer Anwendungen. Autor des ersten deutschsprachigen Buchs über React: React lernen und verstehen (2018).
Frontend Architektur
Konzeption und Implementierung skalierbarer Frontend-Architekturen für Unternehmen verschiedener Größen. Etablierung von Best Practices, Code-Standards und technischen Grundlagen für nachhaltige Entwicklung.
TypeScript & JavaScript
Fundierte Kenntnisse in TypeScript und modernem JavaScript (ES2015+). Erfahrung in der Entwicklung typsicherer, wartbarer Anwendungen mit optimaler Performance.
Testing & Qualitätssicherung
Erfahrung mit React Testing Library, Jest und anderen Test-Frameworks zur Sicherstellung hoher Codequalität und Zuverlässigkeit.
State Management
Expertise in verschiedenen State-Management-Lösungen wie Redux, Context API und TanStack Query für optimale Datenverwaltung in komplexen Anwendungen.
Build-Tools & Bundler
Profunde Kenntnisse in Webpack, Vite und anderen Build-Tools zur Optimierung von Entwicklungs- und Produktionsumgebungen.
Node.js und Deno Backend-Entwicklung
Erfahrung in der Entwicklung von Deno sowie Node.js-basierten Backend-Systemen, die nahtlos mit Frontend-Anwendungen zusammenarbeiten.

Erfahrung

Berufserfahrungmehr als 10 Jahre
Freelancer seit2012

Sprachen

DeutschMutterspracheEnglischverhandlungssicher

Projekthistorie

Freelance Lead Frontend Developer

Spark Networks
Led transition from an external agency to an internal engineering team and removed operational risk. Captured architecture and runbooks, secured credentials, ran technical interviews, onboarded engineers, and uplifted code quality to enable confident delivery.

Freelance Lead Frontend Developer

Eberlein Kunz
Modernized an 8 year React codebase and unlocked real performance gains. Replaced classes with hooks, added caching and virtualized lists, cut load time from over 10 seconds to under 2, and reduced build time from over 45 seconds to under 10. Established a clear architecture that sped up feature work.

Freelance Frontend Architect

finstreet
Defined frontend architecture for a banking consent platform with electronic signatures and audit trails. Aligned closely with backend, set pragmatic team processes, and built a maintainable foundation that made future features straightforward and compliant.

Freelance Frontend Consultant

VR Smart Finanz
Refreshed a 5 year codebase for an SMB bookkeeping platform. Adopted React Hooks, modular state, and TanStack Query to improve reliability and maintainability while requirements changed frequently. Kept delivery steady in a demanding environment.

Freelance Lead Full Stack Developer

Cosuno
Guided integration of 3D construction plans into the core product. Coordinated partners and vendors, clarified scope, documented workflows, and stabilized the project so the team could move forward with confidence.

Freelance JavaScript Consultant

Gymondo
Upgraded several React codebases to current standards and removed friction for engineers. Improved build speed, maintainability, and developer productivity, then delivered product features on the renewed stack.

Freelance Technical Frontend Lead

Börse Stuttgart Digital Exchange
Coordinated handover of the trading web platform to the internal team and ensured continuity. Continued as a hands on contributor, shipped features, and improved the adopted codebase in a performance sensitive environment.

Freelance JavaScript Consultant

Osram Lightelligence
Raised open source maturity across teams. Unified ESLint rules, automated releases with Semantic Release, and improved documentation so internal projects were easier to adopt and maintain.

Freelance JavaScript Consultant

GLS eCom Lab
Built a shared design system quickly adopted by other teams and created a new React app from the ground up. Led a successful beta launch at the end of September that validated the product direction.

Freelance JavaScript Architect

Rocket Internet
Bootstrapped a React application with internationalization at its core. Created a design system with a UI designer and laid the technical base for the customer portal so the product could scale.

Freelance JavaScript Architect and Developer

Lab 1886 / Daimler
Designed the frontend architecture for the back office of a large program with a multi country rollout. Kickstarted implementation with the team and set patterns that supported fast, consistent delivery.

Freelance JavaScript Consultant

KUBIKx / Schmitz Cargobull
Coached developers on React for the group's first venture and simplified the existing codebase. Improved maintainability so the team could add features with less risk.

Interim Tech Lead and Frontend Lead

Porsche Digital Lab
Created the technical concept and architecture as Tech Lead and Frontend Lead. Led a team of 10 and shipped the first product version, setting a high bar for quality and speed.

Freelance JavaScript Engineer

BCG Digital Ventures
Built a React app for precision farming that used satellite imagery to guide fertilizing. Enabled GPS based programs for tractors and turned complex data into clear decisions.

Freelance Lead Frontend Developer

Service Partner ONE
Served as interim Lead JavaScript Developer. Led concept and implementation of new apps and supported hiring for the permanent lead, which accelerated delivery.

Freelance Lead Frontend Developer

ProSiebenSat.1 Digital
Built a React frontend for online learning and video content for 7NXT. Enabled reuse in a multi tenant setup and set up efficient workflows that kept releases predictable.

Freelance Frontend Lead

Handelsblatt/Wirtschaftswoche
Led JavaScript architecture for the new mobile sites across more than 20 devices and platforms including iOS, Android, Windows Phone, Blackberry, and Firefox OS. Balanced cutting edge features with broad compatibility on older devices.

Freelance JavaScript Developer

Zalando SE
Built tools that streamlined collaboration across content, design, and engineering. Delivered a micro CMS, a component library, and automated tracking that improved content operations.

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