Stax
Personal Finance. Enterprise Grade.
FINANCIAL WARRIOR EDITION
Industry Leader Architecture
Enterprise-grade architecture aligned with Stripe, Netflix, and Google patterns. CQRS/Event Sourcing, GraphQL Federation, automated rollback, and production reliability.
Data Layer
3/3 CompleteAPI & Integration
3/3 CompleteSecurity & Reliability
4/4 CompleteSystem Architecture
Hover over components to explore the data flow and connections between services.
Technology Stack
Technical Features
CQRS + Event Sourcing
Full event sourcing with aggregate snapshots, time travel queries, and optimistic concurrency control.
GraphQL Federation
Strawberry GraphQL with federation support, subscriptions via WebSocket, and type-safe resolvers.
Financial Warrior System
XP progression, 50 levels, 28 achievementsโgamification that makes finance engaging.
Row-Level Security
PostgreSQL RLS on 11 tablesโdatabase-enforced tenant isolation, even if app code has bugs.
Dual-Database Architecture
PostgreSQL OLTP + DuckDB OLAP achieving 5.6ร faster analytics queries.
Production Reliability
Circuit breakers, dead letter queues, automated rollback, DAST scanningโenterprise-grade from day one.
Why I Built Stax
I Needed This
Not a toy project. A real tool I use daily to track finances across two countries.
Nothing Fit
Every app was either too simple or locked behind subscriptions for basic features.
AI as Partner
Proof that Claude can co-build production systems, not just write snippets.
Path to Freedom
Know your money, plan your escape.
How It's Being Built
Architecture Before Code
CQRS and event sourcing designed before writing a single transaction. No shortcuts.
Frozen Domain Layer
Business logic locked at 91/100 purity. Infrastructure can change; rules don't.
Claude as Co-Pilot
Every endpoint, test, and migration built through AI collaboration. 234 and counting.
Right Tool, Right Job
PostgreSQL for transactions, DuckDB for analytics. 5.6ร faster queries by design.
Security at the Database
Row-Level Security on 11 tables. Even buggy app code can't leak your data.
Tests Prove It Works
2000+ tests. Not for showโfor confidence when shipping at 2am.
Built for one user. Engineered for thousands.
Ready to Explore?
Stax is live and production-ready. Experience enterprise-grade architecture and the Financial Warrior system in action.