Learn Java Core Banking System

Kaufman skill map, learning strategy, domain boundary, practice loop, and engineering rubric for mastering Java-based core banking systems.

Core Banking as Ledger, Product, Risk, and Control System

Core banking as a ledger, product, risk, and control system; mental model, architectural implications, domain responsibilities, failure boundaries, and engineering trade-offs.

Banking Domain Map: Party, Account, Product, Agreement

Banking domain map yang memetakan Party, Account, Product, Agreement, relationship, lifecycle, dan boundary agar engineer tidak membangun core banking sebagai CRUD customer/account biasa.

Core Banking Invariants & Failure Thinking

Invariant dan failure thinking untuk core banking system: money conservation, double-entry, idempotency, causality, lifecycle guard, audit trail, reconciliation, dan defense against distributed failure.

Money, Ledger, and Double-Entry Accounting Model

18 min

Money, ledger, and double-entry accounting model for Java-based core banking systems, covering monetary representation, journals, posting lines, account categories, ledger invariants, and safe implementation patterns.

Account Model, Balance Types, and Account Lifecycle

Account model, balance types, holds, overdraft, restrictions, lifecycle state machine, and account-level invariants for Java-based core banking systems.

Transaction Canonical Model: Command, Event, Posting

18 min

Transaction canonical model for Java core banking systems: command, event, posting instruction, posting batch, transaction status, causality, correlation, value date, and ledger-safe API boundaries.

Posting Engine Design: Validation, Idempotency, and Atomicity

18 min

Posting engine design for Java core banking systems: validation pipeline, idempotency, atomic journal commit, duplicate suppression, account-level serialization, atomicity, replay, repair, and unknown outcome recovery.

Reversal, Adjustment, Correction, and Backdated Transaction

Reversal, adjustment, correction, and backdated transaction patterns for defensible Java core banking systems.

Subledger, General Ledger, and Chart of Accounts Interface

Subledger, general ledger, chart of accounts, GL mapping, suspense accounts, reconciliation, and accounting interface design for Java core banking systems.

Product Catalog, Parameterization, and Configuration Governance

Product catalog, parameterization, versioning, effective dating, approval workflow, simulation, and configuration governance for Java-based core banking systems.

Deposit Products: Savings, Current, and Term Deposit

Domain-engineering model for deposit products in Java core banking systems, covering savings, current accounts, term deposits, lifecycle, balance semantics, restrictions, holds, interest interactions, fees, and operational edge cases.

Loan Products: Amortization, Schedules, Delinquency, and Repayment

Loan products, amortization schedules, delinquency modelling, repayment allocation, accounting events, and Java design for loan servicing in core banking.

Interest Engine: Accrual, Capitalization, and Compounding

Interest engine design for Java core banking, covering accrual, capitalization, compounding, day-count conventions, rate changes, rounding, idempotency, and ledger integration.

Fee, Charge, Tax, Waiver, and Pricing Engine

Fee, charge, tax, waiver, and pricing engine design for Java core banking, covering configurable pricing, decision trace, accounting events, idempotency, reversal, simulation, and governance.

Payment Domain Model: Internal Transfer, External Transfer, and Status

Payment domain model for Java core banking, covering internal transfers, external transfers, payment state machines, settlement, returns, idempotency, repair queues, and ledger integration.

Clearing, Settlement, ISO 20022, and Message Mapping

Clearing, settlement, ISO 20022, and message mapping for Java core banking systems, covering rail boundaries, canonical payment models, pacs/pain/camt concepts, acknowledgement, return, settlement, reconciliation, and operational controls.

Card, ATM, POS Boundary, and PCI-Aware Core Integration

Card, ATM, POS, authorization hold, capture, reversal, settlement, dispute boundaries, and PCI-aware integration patterns for Java core banking systems.

Channel Integration, API Gateway, and Anti-Corruption Layer

Channel integration, API gateway responsibility, anti-corruption layer, canonical command design, idempotency, error contracts, and Java boundary patterns for core banking systems.

Event-Driven Core Banking Without Breaking Ledger Truth

Event-driven core banking design without breaking ledger truth: domain events, accounting events, outbox, projections, ordering, replay, idempotency, and downstream integration.

End-of-Day, Beginning-of-Day, and Operational Calendar

End-of-Day, Beginning-of-Day, operational calendar, business date control, batch orchestration, idempotent rerun, restartability, control totals, and production-grade banking operations.

Reconciliation: Internal, External, Nostro, Suspense, and Break Management

Reconciliation in core banking: internal reconciliation, external statements, Nostro/Vostro, suspense account, break management, matching engine, evidence, aging, SLA, and accounting-safe correction.

Maker-Checker, Four-Eyes Approval, and Operational Control

Maker-checker, four-eyes approval, segregation of duties, approval matrix, operational controls, override governance, evidence, and Java architecture for banking-grade approval workflows.

Audit Trail, Evidence, Lineage, and Non-Repudiation

Audit trail, evidence, lineage, tamper evidence, non-repudiation limits, forensic query, retention, privacy, and Java architecture for defensible banking systems.

Exception Queue, Repair Workbench, and Case-Oriented Operations

Exception queue, repair workbench, manual intervention, SLA, escalation, evidence, ownership, and case-oriented operations for defensible core banking systems.

Risk Data Aggregation, BCBS 239, and Regulatory Reporting Readiness

Risk data aggregation, BCBS 239 principles, regulatory reporting readiness, lineage, controls, reconciled numbers, and Java architecture for defensible banking data.

Data Ownership, Master Data, Reference Data, and Effective Dating

Data ownership, master data, reference data, effective dating, as-of correctness, governance, and Java architecture for defensible banking data.

Privacy, Retention, Consent, and Minimum Necessary Banking Data

Privacy, retention, consent, legal hold, minimum necessary data, masking, access control, and Java architecture for privacy-aware core banking.

Fraud, AML, Sanctions, and Core Banking Decision Points

Fraud, AML, sanctions, transaction monitoring, screening boundaries, decision points, holds, release/reject flows, case handoff, and evidence design for Java core banking systems.

Modular Monolith vs Microservices for Core Banking

Architectural decision framework for modular monolith versus microservices in Java core banking systems, with bounded contexts, ledger consistency, deployment topology, and evolutionary strategy.

Data Architecture: Event Store, Relational Ledger, Snapshot, and Projection

Data architecture for core banking ledgers using relational journal tables, append-only events, balance snapshots, projections, schema evolution, replay, and audit-grade lineage.

Core Banking Performance, Scalability, and Contention Management

Performance, scalability, contention, lock strategy, hot-account handling, batch posting, capacity modeling, JVM profiling, and safe optimization for Java core banking systems.

Migration, Coexistence, Data Conversion, and Parallel Run

23 min

Migration, coexistence, data conversion, parallel run, cutover governance, reconciliation, and fallback strategy for Java-based core banking modernization.

Testing, Certification, Simulation, and Ledger Property Tests