✦E-Banking & Fintech Microservices✦
Alsharq Bank
High-security e-banking microservices platform featuring multi-currency Accounts Management and real-time Bill-Pay orchestration.
ClientAlsharq Financial Institution
Timeline6 Months
Year2023
Engineering RoleLead Backend Architect & Financial Security Engineer
Key Engineering Metrics & Business Impact
100%
ACID Ledger Consistency
< 85ms
Average Core API Latency
Zero
Security Breaches or Drift
99.99%
System Service Uptime
The Operational Challenge
A comprehensive e-banking system, including Accounts Management and a Bill-Pay service, with a strong focus on security, performance, and system scalability. Engineered to comply with strict central banking compliance, double-entry ledger audits, and zero-trust authentication.
- ✦Designing strict ACID double-entry accounting ledgers where transaction loss or balance drift is mathematically impossible.
- ✦Protecting against race conditions and concurrent double-spend attacks during flash billing cycles.
- ✦Achieving sub-100ms API response times across core banking transaction validation endpoints.
Engineering & Architecture
Zero-Trust Financial Microservice Engine
- •Implemented cryptographic request signing and mutual TLS (mTLS) across internal microservice boundaries.
- •Engineered distributed transactional locks with Redis and PostgreSQL row-level locks, guaranteeing zero double-spend anomalies.
- •Architected an immutable write-once ledger audit trail satisfying statutory banking compliance standards.
Technology Stack & Cloud Infrastructure
Microservices Backend
Python 3.11Flask EnterpriseCeleryRabbitMQ Message Broker
Data & Ledger Audit
PostgreSQL (ACID double-entry ledger)Redis Distributed Locks
Security & Compliance
mTLS CommunicationHMAC SHA-256 Request SigningJWT + Hardware 2FA
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