Full-Stack SystemFeatured Case Study

Aurora Core: Double-Entry Immutable Ledger

Financial transaction engine supporting strict ACID guarantees, cryptographic audit trails, and multi-currency exchange balancing.

Inspect Source Code Live Production Instance

Aurora Core: Double-Entry Immutable Ledger

The Engineering Challenge

Problem & Root Cause

Legacy financial system relied on single-entry balance rows that periodically drifted during race conditions, requiring manual reconciliation at end of day.

Architectural Solution

System Architecture Strategy

Constructed an immutable, append-only double-entry ledger in PostgreSQL with strict constraints, optimistic locking, and a Next.js administrative treasury portal.

Architectural Blueprint

Interactive Architecture Explorer

System Topology & Data Pipelines

Inspect real distributed blueprints. Select nodes to evaluate tier boundaries, consensus mechanisms, caching strategies, and failover topologies.

Aurora Ledger Isolation BlueprintClick any node to inspect protocols & failover architecture

Active Blueprint

Verified Protocols:gRPC / ProtobufHTTPS / RESTACID SerializationRaft Quorum

Node Architecture Deep-Dive

Treasury Management UI

Role: Admin Portal

System Responsibility

Next.js React Server Components with real-time settlement telemetry.

Engineered With

Next.js 15React 19Tailwind

Inter-Service Pipeline Links

Outbound Dispatches:

To: Ledger Engine APIHTTPS/REST

To: Reporting Read-ReplicaSQL Connection

Core System Implementation

Detailed Architecture Overview

Next.js App Router admin interface connects to a hardened transaction processor API with isolation-level serializable transactions and cryptographic hash chaining per account block.

Critical Technical Highlights:

Strict double-entry accounting with balanced credit/debit constraint assertions

Cryptographic SHA-256 block chaining guaranteeing tamper-evident audit records

Sub-millisecond ledger queries with customized B-tree and composite indexing

Comprehensive admin reconciliation studio with simulated multi-currency stress testing

Personal Engineering Contribution:

Sole author of core SQL migration schema, transaction locking strategy, and full-stack administration dashboard.

Verified Production Metrics

Eliminated 100% of balance discrepancies across 14M transactions
Passed SOC2 Type II compliance audit with zero discrepancies
Enabled audited real-time settlement in under 120ms

Edge Cases & Lessons Learned

Preventing deadlocks under concurrent debit/credit requests required deterministic account ID sorting before acquiring row-level locks.

Applied Technologies & Tooling

TypeScript(Frontend)

Next.js 15(Full-Stack)

PostgreSQL(Database)

Prisma ORM(Backend)

Tailwind CSS(Frontend)

Docker(DevOps)

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