10/20/2026 updated

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Full-Stack Software Developer & Computer Science Master's Student

Den Haag, Netherlands
Worldwide
Master of Science in Computer Science (expected Jul 2027), University of Amsterdam & Vrije Universiteit Amsterdam
Den Haag, Netherlands
Worldwide
Master of Science in Computer Science (expected Jul 2027), University of Amsterdam & Vrije Universiteit Amsterdam

Profile attachments

CV2026-JonasGundlach.pdf

Full-Stack Web Development
Expertise in building and scaling production web platforms end-to-end, using TypeScript, JavaScript, React, Astro, Node.js, PHP and Laravel, serving millions of visitors.

CMS & Component Library Development
Development of scalable CMS solutions and responsive component libraries with 50+ custom blocks, powering hundreds of pages across multiple languages.

API Integration & Backend Development
Integration of REST APIs and blockchain-based workflows (Corda), as well as backend development with Node.js, PHP/Laravel, PostgreSQL and Supabase for real-time data synchronisation.

Tailwind CSS & UI Development
Proficiency in Tailwind CSS for building modern, responsive user interfaces with a focus on maintainability and rapid development.

Database Management
Experience with PostgreSQL and Supabase for relational database design, management and integration in web applications.

Search Engine Optimisation (SEO)
Management of SEO efforts to improve website performance and organic traffic for production platforms.

AI-Powered Platform Development
Development of AI-powered strategic planning platforms using LLM-based analysis to deliver structured insights and executive summaries from external data sources.

Version Control with Git
Use of Git for version control and collaborative software development across multiple projects.

Languages

GermanNative speakerEnglishFluentFrenchBasic knowledgeDutchFluent

Project history

Lead Developer

StrategyOS
Lead development of an AI-powered strategic planning platform that guides companies through a structured five-phase strategy process. Built research and analysis modules that enrich company data with external sources and use LLM-based analysis to deliver structured insights and executive summaries.

Freelance Software Developer

Freelance
Design, build and ship websites and web apps end-to-end for clients, including myRoomies (Dutch room-rental marketplace), North Star Agency (strategy consultancy), YoungPolymer (compostable bioplastics startup) and Miami Nice (student festival).

Developer

Weeztix (formerly Eventix)
Built and scaled the Weeztix CMS as sole developer, handling 2 million page views a year. Created a responsive component library with 50+ custom blocks for rapid development, powering 400+ pages across 6 languages. Developed the Ticketing Maturity Index, a multilingual assessment tool for event organisers. Managed search engine optimisation efforts, improving both performance and organic traffic.

Developer

PayperChain
Refactored the entire payment dashboard, modernising the UI and significantly improving maintainability. Integrated core APIs to sync real-time data with the platform's Corda-based blockchain workflows for secure payment and invoicing.

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