Hi. I am Javier, a spanish guy based in Switzerland.
Building applications since 1996. At a certain point in my life I decided to create SaaS startups and try to make a living with them. I would like you to join me in this journey, where I will share with you everything I learn in the process.
In my spare time I also travel around Europe by motorbike, cook delicious spanish dishes, and organize healthy events in Switzerland.
CurrAPI
🇺🇸Historical Currency Exchange Rates API
A simple API to retrieve the exchange rate between two currencies on a specific date. Perfect for finance apps, SaaS tools, and developers who need accurate, official data.
I also built a NodeJS package to make it easier to use the API in your projects. Check it out on npm:@appaka/currapi
- 📅 Date-based historical lookup
- 🌍 Any currency pair
- ⚡️ Fast & Redis-cached
- 🔐 API Key authentication
- 💳 Stripe-powered subscriptions
- 🛠️ Tech stack: Next.js, Hono, tRPC, Drizzle, Redis, Clerk
Find barbers in Switzerland who speak your language — not just the local one.
As an expat, I was tired of bouncing between barbers who didn’t understand what I wanted, and getting misleading recommendations based on vague 5-star reviews.
So I built swissbarbers.ch — a search engine for barbers in Switzerland where you can filter by language spoken (English, Spanish, Chinese… anything), and trust the reviews a bit more than Google Maps.
It’s not just for expats. It’s for anyone who wants to communicate clearly with their barber — even if you’re just passing through Switzerland for a few days.
- Next.js (App Router) + TypeScript
- Clerk for user authentication
- Drizzle ORM + PostgreSQL for structured DB
- Redis for caching
- TailwindCSS + ShadCN/UI for UI components
- Google Maps / Places API to import and enrich barber data
- Custom review system with language filtering and GeoIP location tracking (to detect fake reviews)
- Live coverage: Zug, Zürich, Luzern, more to come
Micro-SaaS that auto-generates Google Calendars for Fitnesspark gym members in Switzerland. Users can filter by gym location and class type (e.g. yoga, bodypump) to stay updated on schedules without manual work. Solves a real niche pain: there’s no official way to sync classes to personal calendars.
- 🛠️ Built with Next.js, Luxon & ical-generator
- 📡 Live and running — fully automated
Managing money shouldn’t be a headache. Prosperya is a next-gen personal finance manager designed to give you complete clarity over your income, expenses, and financial goals.
💡 What makes it different? Unlike traditional budgeting apps, Prosperya offers a unique feature that no other competitor has: "future me", projecting the future income/outcomes using AI.
- 🔹 Track every penny effortlessly
- 🔹 Plan ahead with smart insights
- 🔹 Stay in control, no matter your financial situation
📩 Launching soon! Join the waitlist and be the first to try it.