01
Outsyd
AI travel planner. Type a city and get the day organised on a map — stops, timings, meals, transfers — in seconds. Plus flight deals, price alerts and real-money cashback.
Apps · Games · Websites · Hardware
Portfolio — Edition 2026
Gabriele Decandia.
Independent software developer building products from idea to launch. A travel app live on both app stores, a mobile game in beta, websites for businesses in my hometown, a machine-learning thesis built on my own app — and plenty of custom-built PCs.
- Based in
- Altamura, Puglia, Italy
- Now
- Shipping Zaptopia 1.35 to beta testers
- Next
- M.Sc. Cybersecurity, University of Pisa
- November
- Travelling in the United States — let’s meet
Selected work05
2025 — 2026
Apps, a game, websites, research
Roguelike deck-builder · iOS & Android · Beta
02
Zaptopia
A roguelike card battler for phones. Creatures fight in lanes on a 3D table, combos multiply damage and Jokers bend the rules. From first prototype to closed beta on both stores in under two weeks.
03
Nicoletti Raffaele
Bilingual showcase for my uncle’s sofa workshop. Hand-coded, cookie-free, with a catalogue that lives in one data file — and every photo rebuilt from the workshop floor.
04
Caseificio Rinaldi
Online shop, brand guidelines and local presence for a new artisan dairy in Altamura — set up so the people behind the counter can run it themselves.
100%
accuracy on the test set — and why I don’t trust it.
05
Outsyd Sentinel
My bachelor’s thesis project: machine learning that routes traveller reviews to the right department and reads their sentiment. The trained model runs live in the case study — try to break it.
By the numbers
Counted from the code and the dashboards — not rounded up.
- 29 Cloud Functions behind Outsyd — itineraries, flight deals, price alerts, cashback, moderation. Outsyd · backend
- 270 automated tests guarding Outsyd’s Flutter codebase. Outsyd · test suite
- 36 Android release builds of Zaptopia in its first three weeks. Zaptopia · Sep 30 – Oct 20, 2026
- 1,065 interface strings in Outsyd, every one in Italian and English. Outsyd · localisation
- 1.1M+ views on the TikTok account I run to bring travellers to Outsyd. @outsydapp · Sep 2026
How I work
Four rules, each learned on a real project.
No number without a source.
Outsyd once showed star ratings and “−60%” badges that looked great and were invented. I removed every one. A rating, a price or a discount now appears only when it comes from a real source — otherwise the interface shows nothing. Trust is the product.
Seen in OutsydTreat the client as hostile.
When an app moves real money, every field a phone writes is a possible attack. Outsyd’s cashback is clamped and validated on the server, bookings can only be created as pending, withdrawals run in server-side transactions. That mindset is why my next step is cybersecurity.
Seen in OutsydShip, then listen.
Zaptopia went through 36 release builds in three weeks, each one shaped by tester feedback. A bot plays full runs through the real game code, so balance changes get measured instead of guessed.
Seen in ZaptopiaAI-assisted, never AI-decided.
I use AI coding agents every day — they make one developer fast. The architecture, the trade-offs, the review and the testing on real devices stay with me, and so does the responsibility for what ships.
I build machines, too.
Custom PC builds
Assembled by hand
Software is half of it. I have extensive hands-on experience building custom PCs — from the parts list to the first stable boot.
- Parts chosen around a budget and a use: gaming, work, streaming
- Compatibility, power and thermal planning
- Assembly, cable management and airflow
- BIOS setup, updates and stress testing
A few of my builds — black and all-white, air-cooled, in mesh and panoramic glass cases.
About
On the right: graduation day, 2026. In Italy you graduate wearing a laurel wreath.
I’m Gabriele, an independent developer from Altamura — a town on the Murgia plateau in southern Italy, famous mostly for its bread.
Outsyd started from a personal annoyance: arriving in a port city with a few hours and no plan. I built it during my bachelor’s in Computer Science, put it on both app stores and have kept shipping since — features, fixes, release notes, store listings, affiliate partnerships and a TikTok account to bring people in.
Along the way I started building for the people around me: a showcase site for my uncle’s sofa workshop, an online shop for a family dairy and, this autumn, a game of my own.
I’m spending November 2026 in the United States. When I’m back, I start an M.Sc. in Cybersecurity at the University of Pisa.
- Education
-
B.Sc. Computer Science (L-31) — graduated 2026Thesis: Outsyd Sentinel, machine learning for business processesM.Sc. Cybersecurity — University of PisaStarting after the trip
- Languages & frameworks
- Dart & Flutter · TypeScript · JavaScript · Python · Node.js · Phaser · Three.js · Capacitor · scikit-learn · Streamlit
- Platforms
- Firebase (Auth, Firestore, Cloud Functions, Messaging, App Check, Hosting) · Supabase · WordPress & WooCommerce · App Store Connect · Google Play Console · GitHub
- Hardware
- Custom PC building — part selection and compatibility, assembly, cable management, airflow and thermals, BIOS setup, stress testing
- Beyond code
- Store listings and release notes · app review cycles · affiliate networks (Travelpayouts, Impact, CJ) · short-form video marketing
Contact
Altamura → USA → Pisa
Let’s build something — or just grab a coffee.
I’m in the United States throughout November 2026. If you’re working on something interesting, want to see Zaptopia on a real phone or just want to talk shop, write me.