Kaellun
Elegant engineering for AI-integrated products.
Studio
Kaellun is the studio practice of Rui Luís — a solo Mobile Product Engineer based in Almada, Portugal. I build production React Native apps, full-stack web platforms, and AI-integrated experiences end-to-end.
The practice is grounded in craft: clear architecture, careful UI, reliable delivery. Small teams, close collaboration, no heavy process.
Services
Mobile Product Engineering
Production React Native apps for iOS and Android. End-to-end ownership from architecture to App Store delivery.
AI-Integrated Experiences
OpenAI, Claude, and Gemini integrated into mobile and web products. Thoughtful prompt design and AI-augmented workflows.
Full-Stack Development
Astro, Cloudflare Workers, Firebase, Stripe, Mollie. Web platforms, payment infrastructure, and admin tooling.
Process
Concept
Understanding the problem, shaping the product vision.
Design
UI decisions, data models, architecture choices.
Implementation
Building with care. Shipping in small increments.
Deployment
Release to App Store, web, or production. Ongoing iteration.
Work
Dropp.love
LIVECreator marketplace platform. React Native frontend, Cloudflare Workers backend, Mollie Connect payment infrastructure for PSD2-compliant fund flows.
ruiluis.pt
LIVEFull-stack e-commerce and ticketing platform. Built on Astro and Cloudflare Workers, integrated with Stripe payments and Printful fulfilment.
Sorayamoon.com
LIVEE-commerce platform for dance educator Soraya Moon. Built on Astro with custom checkout and content management.
Awareness
IN DEVELOPMENTMindfulness and meditation companion for daily practice. Designed with elegant simplicity and deep intentionality.
Start Your Project
Let's turn your vision into something precise and honest. Reach out to begin the conversation.
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