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Jonathan G
@jonathangriesin
React Nextjs and TypeScript Developer
Deutschland
Deutsch, Englisch, Chinesisch
Über mich
I'm Jonathan, a German fullstack developer with 4+ years of professional experience in agency and financial-services teams. I build and maintain web applications with React, Next.js and TypeScript. I can help you fix frontend bugs, connect Sanity CMS, migrate JavaScript to TypeScript, or build a document chatbot with source citations. You receive maintainable code, testing notes and a clear handover. I work in German and English and am based in South Korea. Send me your requirements so we can agree on a practical scope.
Kompetenzen
Jonathan G
offline •
Meine Dienstleistungen
Fehlerbehebung
I will fix react and nextjs bugs with tested code and clear handover
Scripting
I will migrate your react javascript modules to typescript
Arbeitserfahrung
Assistant Manager Software Delivery Web API and Mobile
FFB
Mar 2024 - May 2026 • 2 yrs 2 mos
Developed and maintained financial-services web applications with React, TypeScript, Node.js and AWS. Contributed to authentication migration and frontend modernization, migrated JavaScript code to TypeScript, and supported production maintenance and cross-team delivery.
Fullstack / Frontend Developer
Reply
Mar 2022 - Feb 2024 • 1 yr 11 mos
Built and maintained enterprise web applications with React, Next.js and TypeScript. Implemented reusable UI components and pages, integrated headless CMS content, and collaborated with designers, backend developers and project teams.
