Open to new projects · Q3 2026

Building fast, useful
web products from Málaga.

Frontend developer with 3+ years shipping React, Next.js and TypeScript. Currently bootstrapping Besmeo, a SaaS turning hospitality menus into interactive digital experiences.

StackReactNext.jsTypeScriptTailwindSupabaseFirebaseNode
01 / About
Juan Castilla

I build interfaces that feel obvious to use and run fast on real devices. Three years across consultancies, agencies and now as a developer at Solbyte — but the work I'm proudest of is Besmeo: a SaaS I shipped end-to-end and got paying customers for through cold outreach.

Currently
Frontend Dev @ Solbyte
Founder of Besmeo
Based in
Málaga, Spain
Available worldwide
02 / Selected work

Things I've shipped.

3 projects · 2023–2026

Besmeo

SaaS
Frontend Developer · Full product · Solo build

A SaaS that turns restaurant PDF menus into interactive digital catalogs — with AI image generation, multilingual translation and a subscription billing layer. Architected, designed and shipped from zero. First paying customer landed via cold outreach.

Next.jsTypeScriptTailwindFirebaseStripe
Status
Live
2026 →

Wakalea

Product
Frontend Developer · Travel experiences platform

Discovery web app where users browse curated day-trip and weekend experiences. Built the search, filtering and listing layer with an interaction model designed for impulse-planning.

Next.jsReactSupabase
Status
Live
2025

Time-tracking app

Internal
Frontend Developer · Solbyte (internal)

Internal clock-in app used daily by 50+ employees. Led the full frontend rebuild from a legacy system: reusable component library, REST integrations, and a measurable accuracy + UX uplift.

ReactJavaScriptREST
Status
In production
2025
03 / Contact

Got something
to build?

Open to freelance, contract and full-time roles. Fastest reply via email.

GitHub
github.com/juancastillam98
LinkedIn
in/juan-castilla-mariscal
X / Twitter
@juancastillamar
Instagram
@juacasmariscal
© Juan Castilla Mariscal · 2026
Built in Málaga · v1.0