Designing a Distributed Cache Inspired by The Lord of the Rings: One Insight to Rule Them All
The Quest Begins (The "Why") Ever felt like your application is constantly begging the database for the same piece of data over and over? I remember…
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APIWatch: Checking API Traffic and Subscription Controls with WSO2 API Manager
I recently worked on a project called APIWatch using Python and WSO2 API Manager. It is a small monitoring tool that reads API traffic logs and help…
Your company's knowledge doesn't go missing. It goes wrong.
How we built Strata, a company brain on FalkorDB that notices when a document has become false, for Graph Hacks. Code: https://github.com/manasdutta…
Tracing Fraud Rings with a Graph: What I Learned Building with FalkorDB
Banks flag suspicious transactions all day. The hard part isn't the flag—it's seeing what's behind it. Fraud rings can hide in relationships: accoun…
5 Common JSON Mistakes That Break API Requests (With Fixes)
JSON is one of the most common formats used to exchange data between frontend applications, backend services, and APIs. It looks similar to a JavaSc…
Retry Storms: Hardening n8n Workflows Against Thundering Herd Failures
A 90-second upstream blip doesn't take you down. What your retries do in the ninety seconds after it ends does. We learned this the expensive way. A…
AsyncLocalStorage vs Scope.REQUEST in NestJS: Fixing a Multi-Tenant Data Leak Without Killing Performance
A while ago in a high-scale multi-tenant B2B SaaS platform, we ran a high-concurrency benchmark before launching an enterprise data portal. Everythi…
A $16,500 GCP bill nobody could explain. Logging was $3,800
The GCP account I remember most clearly had a billing problem nobody could locate Medium-sized SaaS company. Four GCP projects. Total monthly spend:…
Testing Idempotency, Webhooks, and Race Conditions in Payment APIs
Payment bugs do not always originate from a missing patch or weak password. Some appear when two requests arrive almost simultaneously, a callback i…
AI Can Build Your React UI in Seconds. What About the Backend?
A few weeks ago, I opened Cursor and gave Claude a single prompt: "Generate a modern task management dashboard with filtering, search, pagination, a…
Travel Planner Retrieval Design with Bounded Access Rules and Source Citations
Short answer: a travel itinerary planner needs a staged retrieval architecture with bounded access rules and source context attached to every answer…
Building Inventory Applications That Don’t Lose Track Of Their Inventory
Let’s imagine we have an inventory system. Two of its customers decide to order the last remaining unit of a given product at roughly the same time.…
Ledger errors should name the invariant they protect
A payout worker catches an exception from the ledger and has to decide, with no human in the loop, whether to retry the request, park it, or escalat…
GitHub push protection for Anthropic keys: check repo coverage
When an AI coding agent commits a generated configuration file, an API key can end up in Git before anyone notices. GitHub’s new Anthropic detectors…
How to add Cloudflare browser rendering to a SaaS without running a browser fleet
A screenshot or PDF endpoint looks small in a product spec: accept a report, render it, return a file. The hidden work is the browser fleet behind t…
Profiling a Slow Application: Stop Guessing, Start Measuring
Your application is slow. Users are complaining. API requests are taking too long, and pages are struggling to load. Your first instinct might be to…
Idempotency keys done right: exactly-once effects over at-least-once networks
Why "just retry" creates duplicate payments, and a PostgreSQL-backed design for idempotency keys that survives double clicks, timeouts, crashes and…
This 3-Line Python Mistake Can Disable Your Entire API Authentication
Ever written a security check that looked perfectly reasonable... until you realized it could let everyone in ? Here's a tiny Python mistake that ca…
Name Cloudflare Cron Triggers in Sentry
A scheduled Worker can run on time and still leave monitoring hard to read. When Sentry labels a check-in with a raw cron expression, the schedule i…
Node.js Cron Health Checks for Missed Pricing Rollout Job Detection
For a Node.js cron health check that must catch a missed pricing rollout job, record every expected tenant-scoped run and alert when its deadline pa…
Enable MySQL HeatWave REST Service (MRS)
Introduce the MySQL HeatWave REST Service (MRS), a fully managed, integrated solution that lets you create RESTful API endpoints instantly, directly…
Transactional Welcome Email Explained: Custom Domains and Template Ownership
Send transactional email from a dedicated subdomain, authenticate it with SPF and DKIM, publish a DMARC policy, and keep the template contract in th…
Top 5 Best US Stock Market APIs for Developers in 2026
Building a stock market dashboard, portfolio tracker, investment research platform, or financial application requires reliable access to market data…
Transactional Email or SMTP Relay: Preserving 2FA Codes and Seller Alerts
A health marketplace has two clocks running at once: a seller should learn about a new order promptly, while a one-time code used to enter the selle…
The Saturday Data Run: 457 Matches, Six Exports, Zero Manual Steps
One match day, 457 finished matches across the data set. The daily export landed with 546 standings rows, 200 scorer lines and 198 rows of match sta…
HikerAPI
I've only used HikerAPI as the data backend for a self-hosted OSINT tool, and so far just for setup and testing, so this is an early look rather tha…
Node.js Email Verification Needs Atomic Tokens
Email verification looks like a small feature: create a token, send a message, and accept the token when the user clicks it. In a real Node.js servi…
How many jobs should a Node.js queue run at once?
Part 2 of 10: Reliable background jobs in Node.js, from zero . By Sandro Dezerio , senior full-stack engineer. The signup scenario is made up, the s…
Error Alerting API Explained: 4 Poll Signals for Unresolved Groups
Short answer: poll a narrow, authenticated summary endpoint on a fixed schedule, but page only when an unresolved error group is both persistent and…
Result Pattern στο ASP.NET Core: Πώς να διαχειριζόμαστε επιτυχίες και αποτυχίες χωρίς να βασιζόμαστε στα Exceptions
Εισαγωγή Ένα από τα σημαντικότερα ζητήματα στον σχεδιασμό μιας σύγχρονης εφαρμογής είναι ο τρόπος με τον οποίο διαχειριζόμαστε τις αποτυχίες. Στην κ…