Full-stack engineer & UX designer
Caitlyn
Carmabella Nayeli
I build production platforms end-to-end - from database architecture to native mobile apps to payment integrations.
Featured build
Solo development of a 181,000-line wellness marketplace in 12 weeks - 120+ screens, 2 active payment providers, 3 live languages, B2B portal, and AI concierge.
What I Build
Production-grade platforms that handle real transactions and real users:
- →Two-sided marketplaces with matching and booking
- →Native iOS/Android apps with responsive web
- →Multi-tenant SaaS with role-based access control
- →Multi-provider payment integrations
- →Real-time WebSocket systems
- →AI-powered features via Claude API
Recent Work
Coyotes and Candles
Full-service creative platform
Live platform consolidating bookings, payments, live video, virtual tabletop, and community into one product - replacing five separate paid tools. Handling real bookings and transactions. Built in ~8 days of active development.
Bluumo
Two-sided wellness marketplace
Live two-sided wellness marketplace operating in Finland. Real transactions across four payment rails (Visma Pay, Edenred, Epassi, Smartum), B2B corporate portal with employer onboarding and Wellbeing Allowance integration, native mobile apps on iOS and Android, and an AI concierge. Built and launched solo in ~12 weeks.
Suumio
AI companion journaling app
AI journaling product with active Stripe billing on web, with iOS and Android builds in progress. Users journal with one of 42 distinct AI companion personalities powered by Claude, across 32 languages.
Technical Stack
Background
Experience: 8+ years development, 10+ years design/product
Education: B.Sc. IT (Metropolia), UX Design (Prime Digital Academy)
Location: Helsinki, Finland
Status: Open to full-stack engineer roles (EU work authorization)