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#Fintech

Articles tagged with Fintech. Practical engineering insights for production systems.

7 articles on this page

2026-05-15 3 min read

Open Banking API Design: Building FinTech Integrations That Banks and Partners Trust

Open banking and financial API integrations demand strict contracts, OAuth flows, and idempotent money APIs. A system design guide for PSD2, account aggregation, and embedded finance.

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2026-05-14 3 min read

Multi-Tenant FinTech SaaS: Data Isolation, Blast Radius, and Compliance Boundaries

B2B FinTech platforms serve multiple clients on shared infrastructure. Learn tenant isolation patterns—from row-level security to cell-based architectures—for security and compliance.

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2026-05-13 3 min read

Real-Time Fraud Detection Architecture for FinTech: Rules, ML, and Human Review

Fraud systems must decide in milliseconds without blocking legitimate payments. Learn the architecture for rules engines, feature stores, ML scoring, and analyst workflows in FinTech.

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2026-05-12 3 min read

Double-Entry Ledger Architecture: How FinTech Platforms Track Money at Scale

Balances are derived, not stored. Learn double-entry ledger design for FinTech: account models, posting rules, sharding, and reconciliation at millions of transactions per day.

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2026-05-11 3 min read

KYC and AML System Design: Engineering Compliance Into FinTech Onboarding

KYC/AML is not a vendor checkbox—it is a workflow engine with audit trails. Learn how to architect identity verification, risk scoring, and sanctions screening for FinTech platforms.

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2026-05-10 3 min read

Payment Gateway Architecture: Idempotency Keys, Ledger Design, and Exactly-Once Money Movement

Payment systems fail at network boundaries. Learn production patterns for idempotency keys, ledger entries, reconciliation, and exactly-once semantics when moving money.

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2026-04-10 3 min read

Concurrency in Distributed Systems: Lessons from Handling Financial Transactions

Handling money requires more than just database transactions. Learn how to manage idempotency, race conditions, and consistency in production systems.

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