Fintech / case study
Payment Bridge Lab
A backend engineering project exploring payment infrastructure, transaction processing, ledger consistency, and reliable distributed systems.
JavaSpring BootKafkaPostgreSQL
View Project →Software Engineer · Java Backend Developer
Building reliable backend systemsfor modern payment platforms.
I design and build clean, dependable software with Java, Spring Boot, and distributed system thinking.
PaymentsLedgersDistributed systems
MK
Moh Khandan
Java Backend Engineer
Focus
Payment Infrastructure & Distributed Systems
Stack
Java · Spring Boot · Kafka · PostgreSQL
Engineering
Reliable, maintainable and scalable backend systems.
Currently Exploring
Financial systems, event-driven architecture and ledger design.
JavaSpring BootMicroservices
Selected work
Projects
2026
Healthcare / platform
AI Health Analyzer
A backend platform for structured health workflows, analysis pipelines, and API-driven product design.
JavaSpring BootAPIsMicroservices
View Project →Engineering Notes
Latest Articles
LedgerJul 24, 2026
Understanding Double Entry Ledger in Payment Systems
A clear introduction to double entry accounting and why payment platforms depend on it.
9 minRead →
ArchitectureJul 24, 2026
Building Event-Driven Payment Processing
How event-driven architecture helps payment systems scale while keeping flows reliable and maintainable.
10 minRead →
Payment SystemsJul 24, 2026
Why Payment Systems Need Idempotency
Understanding idempotency in payment systems and how it prevents duplicate transactions.
8 minRead →
About
Moh Khandan
Backend engineer focused on payment infrastructure, distributed systems, and architecture-driven products. The goal is to build systems that are clear, auditable, and easy to evolve.
Focus
Payment systems
Ledger
Reconciliation
Event-driven design
Java / Spring Boot