Full-stack certification platform with a tokenized economy, AI-driven content pipeline, and real-time community — designed, built, and operated by one developer.
164
API endpoints
28
Firestore collections
1,160
automated tests
15
self-mgmt systems
11
feature domains
4
RBAC roles
AI content pipeline — demand-driven course generation via OpenAI in waves of 30
questions. Users vote; when demand crosses threshold, jobs are created and executed automatically through a
full lifecycle:
starter → proximamente → disponible.Tokenized economy (off-chain) — token ALX earned by completing simulations and
streaks. Multi-path acquisition via Stripe EUR, Bitcoin Lightning (OpenNode) and Web3 Polygon. P2P transfers
with 1% automatic social scholarship donation and 3% APY staking.
Algorithmic mastery per question — state machine per question
(
not_seen → in_progress → mastered/weak) computed from accuracy, consistency, and
attempt history. Real adaptive logic, not a simple percentage.Multi-provider, multi-exam — Microsoft (AZ-900 through AZ-400), Docker, HashiCorp,
Cambridge English. Provider-agnostic: adding a new certification requires only a catalog entry and a
question bank.
RBAC with numeric priority inheritance —
admin(400) > operator(350) > business(300) > student(100). Role enforcement at the
route layer; every write sealed with SHA-256 payload hashing for cryptographic idempotency.// architecture
Browser ── React SPA ── Express API ── Firestore ── OpenAI
│ │ │ │
│ localStorage 11 domains RTDB (chat)
│ (offline) feature-flagged presence
└── Stripe / Lightning / Web3 payments
React 18Express.jsFirebase / Firestore
OpenAI APIStripeOpenNode (Lightning)
Web3 / PolygonAzure Static Web Apps
Azure App ServiceGitHub Actions
VitestPlaywright