things I've
built

Some started as competition entries, others as weekend experiments.

StratolloonStratolloon
Stratosphere as a service
AerospaceEarth ObservationGeointelligence
Co-founded in 2017. Started in hardware, then pivoted to software — a satellite-data analytics platform for insurance and geointelligence.
Galileo Masters winner (2017, 2018) — presented by the European Commission and ESA. Recognized by Banco Santander and Indra (2019). Selected for the Parsec Accelerator (EU Horizon 2020).
stratolloon.com
Apophis TrackerApophis Tracker
Real-time tracker for the closest asteroid flyby in recorded history
SpaceAstronomyReal-time Data
On April 13, 2029, asteroid 99942 Apophis will pass Earth at ~31,860 km — closer than geostationary satellites.
Real-time position, velocity, and visibility — powered by NASA JPL Horizons data.
apophis-tracker.com
sancho.vc toolssancho.vc tools
Financial tools for the self-directed Spanish investor
FintechTax OptimizationPrivacy-First
Tax calculators and portfolio analytics — FIFO fund optimizer, pension plan calculator, and investment performance analysis.
Privacy-first: everything runs in your browser, and nothing is sent anywhere.
tools.sancho.vc