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ANAF SPV E-Invoicing from Java/Spring Boot: OAuth2, JWT Access Tokens, and a Refresh Window That Never Rests

ANAF SPV E-Invoicing from Java/Spring Boot: OAuth2, JWT Access Tokens, and a Refresh Window That Never Rests

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7 min read
We Cut API Tenant Onboarding From Two Days to Three Hours With a Self-Service Portal

We Cut API Tenant Onboarding From Two Days to Three Hours With a Self-Service Portal

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4 min read
Understanding Fetch API and Promises in JavaScript.

Understanding Fetch API and Promises in JavaScript.

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2 min read
6 things that broke our Polymarket trading bot before it made a dollar

6 things that broke our Polymarket trading bot before it made a dollar

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4 min read
How to get Google Trends data in Python without 429 errors

How to get Google Trends data in Python without 429 errors

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3 min read
eBay's Browse API Doesn't Return Sold Listings. Here Is a Node.js Alternative

eBay's Browse API Doesn't Return Sold Listings. Here Is a Node.js Alternative

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2 min read
The retry storm we caused ourselves

The retry storm we caused ourselves

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2 min read
Every open job for a list of companies, in one table (Workday, Greenhouse, Lever and 14 more)

Every open job for a list of companies, in one table (Workday, Greenhouse, Lever and 14 more)

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4 min read
My Stripe idempotency key was correct. It just stopped working after 24 hours.

My Stripe idempotency key was correct. It just stopped working after 24 hours.

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10 min read
Swagger and OpenAPI: The Docs That Write Themselves

Swagger and OpenAPI: The Docs That Write Themselves

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7 min read
Playwright Test Data: Seeding a Real Backend for E2E Suites

Playwright Test Data: Seeding a Real Backend for E2E Suites

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7 min read
JsonFabrica vs. Mockaroo vs. Faker.js for Test Data Generation

JsonFabrica vs. Mockaroo vs. Faker.js for Test Data Generation

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6 min read
Backtesting a Betting Strategy with Historical Odds Data in Python

Backtesting a Betting Strategy with Historical Odds Data in Python

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15 min read
WebSocket subscribe is still authorization

WebSocket subscribe is still authorization

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1 min read
I built a QR code phishing scanner for our free API — and ended up writing a PNG decoder from scratch to make it work.

I built a QR code phishing scanner for our free API — and ended up writing a PNG decoder from scratch to make it work.

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4 min read
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