Joost Kiens
@joostkiens
I build AI-native WebGIS and data visualization products that turn complex data into usable interfaces.
What I'm looking for
I build maps, data visualizations, and interactive interfaces that make complex information readable and useful. At Restor, I led frontend WebGIS and data visualization work across a platform serving 341,979 sites, reducing data-layer load times from minutes to seconds.
I've built Fahsai end to end: an open-source air-quality application that visualizes the cross-border sources of Thailand's PM2.5 crisis for journalists, NGOs, and policymakers. It combines React, TypeScript, Mapbox, Deck.gl, Fastify, PostGIS, Redis, and streaming AI to explain probable pollution sources in plain language.
I also build production AI systems, including Gnosis for a Dutch policy consultancy, and help teams adopt AI without compromising code quality. Across work for KLM, Rabobank, Restor, and other brands, I bring engineering, design sensibility, and 18 years of frontend experience to polished digital products.
Experience
Work history, roles, and key accomplishments
Building Gnosis, a production AI platform for a Dutch policy consultancy. Architected and implemented an agentic document generation system on Claude Teams; structured intake, dossier context injection, factual QA constraints, and .docx/.pptx export, covering eight document types across five active client dossiers.
Roadmap includes RAG over SharePoint via Supabase/pgvector, MCP server integration
Full-Stack Developer and AI Integration
Apr 2026 - Present (5 months)
Built an open-source civic tech application visualizing the cross-border origins of Thailand's seasonal PM2.5 crises, making the connection between agricultural burning in Myanmar and Laos and Thai air quality visually undeniable. Designed as a public interest tool for journalists, NGOs, and policymakers ahead of haze season outreach.
Owned the full technical stack: architecture, implementation,
Senior Creative Frontend Developer (WebGIS, 3D, Dataviz, motion, AI)
Feb 2021 - Present (5 years 7 months)
I help clients turn complex data into fast, polished interfaces, specializing in WebGIS, maps, data visualization, motion, and the UI components and design systems behind them. Increasingly the work is AI-native: I build LLM features into products and use a customized Claude Code setup, with skills, hooks, and MCP servers, to ship more without dropping code quality.
React, TypeScript, Next.js, V
Finalized v2 of wowmedia.com. Highlights include:
- Implemented new functionality for the homepage’s interactive 3D map experience using Three.js
- Direction-aware audio in 3D space using howler.js
- Built the frontend for an AI chatbot, integrating with a custom API
https://www.hypersolid.com/work/wow-media
Frontend WebGIS & data viz lead at Restor; the largest network of restoration and conservation sites across the globe. Think Google Maps for nature 🙂
🏆 Awards & Recognition
- Earthshot Prize finalist
- Geo for Good Impact Awards (Google)
- 2 Anthem Awards (Webby) — including 🥇 Gold for Best Product
Architected, designed (together with an amazing design team), and built most of the features on t
Refactoring and development of new features of the Foundation CMS -- a platform for creating interactive, 6K touch-based presentations with rich media (video, 3D models, interactive maps, Lottie animations, vector graphics).
Reverse-engineered Mapbox Studio's monochrome theming capability (unavailable via their API) by generating 10 Studio themes across a range of base colours, extracting per-la
Front-end developer working on content- and e-commerce websites for Heijmans, SLB, Heineken and Lisman Forklifts.
Mainly TypeScript, React, Sass, Wagtail and some GraphQL.
Building highly interactive platforms and websites for customers like bol.com, Rabobank, Fairtrade Original, KLM, T-mobile, and many more great brands.
I focused on enhancing the user experience through creating delightful user interfaces, functional animations and occasionally more experimental experiences. Furthermore, I played a large role in driving front-end coding conventions and architectu
Building web applications & web sites for clients in 6 continents, including Hawthorn FC and the Government of Zimbabwe 😯.
HTML, CSS, JavaScript, SASS, jQuery, CodeIgniter, WordPress
Taught Thai kids how to build standards-based web sites.
Worked as ESL Instructor at Siam Technology College.
Education
Degrees, certifications, and relevant coursework
Peelland College Deurne
Havo
HU University of Applied Sciences Utrecht (Hogeschool Utrecht)
B.Sc., Geodesy
1996 - 2001
HU University of Applied Sciences Utrecht
Bachelor of Science, Geodesy
1996 - 2001
Pursued a Bachelor of Science in Geodesy, focusing on geospatial data and mapping technologies.
Tech stack
Software and tools used professionally
Google Tag Manager
Motion.ai
GitHub
PostCSS
CSS Modules
PostGIS
Node.js
Next.js
Tailwind CSS
Nuxt.js
Material-UI
three.js
Google Analytics
Redis
React
Vue.js
jQuery
WebGL
React Query
Vanilla.JS
react-three-fiber
Webpack
JavaScript
HTML5
CSS 3
Google Maps
Mapbox
Kafka
Fastify
Gemini
GraphQL
Firebase
Elasticsearch
WordPress
Vercel
TypeScript
npm
CodeIgniter
Lottie
Supabase
Upstash
Railway
Jotai
Instructor
Deck.gl
Framer Motion
pgvector
Agentic
Model Context Protocol (MCP)
React Hook Form
Claude Code
i18next
React Spring
Visx
Availability
Location
Authorized to work in
Portfolio
github.com/JoostKiens/fahsaiSalary expectations
Job categories
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