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The Hidden Engineering Challenges of Building Fintech Across Africa

The Hidden Engineering Challenges of Building Fintech Across Africa

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6 min read
How UPI Works: The ₹0 Magic Behind Every Scan-and-Pay (System Design)

How UPI Works: The ₹0 Magic Behind Every Scan-and-Pay (System Design)

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Comments 1
6 min read
Status 1 proves the transaction ran, not that the tokens moved

Status 1 proves the transaction ran, not that the tokens moved

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Comments 2
6 min read
6 ways an AI agent can still overspend that our payment-MCP census missed (found by readers)

6 ways an AI agent can still overspend that our payment-MCP census missed (found by readers)

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7 min read
98 stars across 26 repos taught me that engineering effort and GitHub stars are unrelated

98 stars across 26 repos taught me that engineering effort and GitHub stars are unrelated

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6 min read
Node.js Feature Flags: REST API Implementation for Fintech Agent Telemetry

Node.js Feature Flags: REST API Implementation for Fintech Agent Telemetry

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5 min read
Fixing Failure-Event Timeout Issues in Node.js — A Fintech Alert Query Design

Fixing Failure-Event Timeout Issues in Node.js — A Fintech Alert Query Design

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6 min read
What Are the Risks of Letting AI Agents Make Payments, and What Controls Stop Them?

What Are the Risks of Letting AI Agents Make Payments, and What Controls Stop Them?

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6 min read
How to validate a list of LEI codes in bulk with the free GLEIF API (Python)

How to validate a list of LEI codes in bulk with the free GLEIF API (Python)

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4 min read
Sanctions Screening API: OFAC vs UK vs EU Lists

Sanctions Screening API: OFAC vs UK vs EU Lists

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2 min read
Building Resilient Payout Systems: ACH Return Codes and Recovery Strategies

Building Resilient Payout Systems: ACH Return Codes and Recovery Strategies

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3 min read
ACH Return Codes Explained: Handling R01–R85 in Production Payout Systems

ACH Return Codes Explained: Handling R01–R85 in Production Payout Systems

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3 min read
Retry Timing Beats Retry Count: A Field Guide to When a Failed Card Works Again

Retry Timing Beats Retry Count: A Field Guide to When a Failed Card Works Again

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3 min read
2026 One API Key Across Models: Compare Token Cost (and Why I Chose One)

2026 One API Key Across Models: Compare Token Cost (and Why I Chose One)

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6 min read
GMO Puts a $1 Million Bounty on Its Hackers After Refusing to Pay Ransom

GMO Puts a $1 Million Bounty on Its Hackers After Refusing to Pay Ransom

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4 min read
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