Co-founder & CEO · Barcelona
Grasshopper Air Mobility
Cargo drones for B2B logistics: autonomous vehicles that fly and drive, designed and built with a small team. The proof of concept is flying.
Projects
What I'm building.
One company has my days. Beside it I build software with AI, and a handful of those tools now run my own week.
Building now
Sotto
A dictation app for the Mac: hold a key, talk, and the cleaned-up text appears wherever the cursor is, with the voice never leaving the machine.
Administration for the cultural sector
Administration software for cultural institutions, covering HR, finances, duty rosters, CRM and more.
Shipped, in daily use
Grasshopper OS
One window for running Grasshopper Air Mobility: the investor CRM, public funding, events and the financial model.
Investor War Room
An investor-relations platform for the Grasshopper funding pipeline, built on a single relationship graph.
Event Radar
Collects events from Luma, Meetup, the Barcelona city agenda and WhatsApp groups, filters them by keyword and AI, and sends a daily digest.
Public Funding Control Room
Monitors public funding calls relevant to Grasshopper across the official sources and tracks each one through to application.
Competitiveness model
A cost model comparing the cost per delivery of cargo drones and ground logistics.
Control Room
A single dashboard for project status, the day's priorities and inbox activity.
Musikschul-Stundenplan
A macOS application for timetable planning at a music school, covering the three scheduling rounds each year.
Personal finance control centre
A local dashboard for personal finances: fixed and variable costs, spending and loan repayments.
Smart Gmail
Merges several Gmail accounts into one sorted overview and files incoming mail automatically.
Expedición LATAM 2026
A trip calendar and task board for Brazil, Paraguay and Argentina, with working hours overlaid to show real availability.
grasshopperairmobility.com
The corporate website of Grasshopper Air Mobility, published in seventeen languages.
jakobsaalfrank.com
A personal website published in four languages.
Last-mile market paper
A research paper sizing what carriers pay for last-mile delivery worldwide, region by region, to 2035.
Parking spot
Professional freelance website
A dedicated website for the freelance practice.
Hairdresser AI
An AI hairstyle try-on for salons: clients see the cut on themselves before booking it.
Barcelona Tycoon
A real-time urban business simulator set in Barcelona: win land at auction, run the shops on it, and compete for the custom of the neighbourhood.