How to Build Your Own Analytics API in Node.js
Build your own analytics API in Node.js: an Express collector with validation, CORS allow-list and rate limiting, plus…
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539 articles
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How to Build a Custom Analytics Dashboard with HTML and JavaScript
Build a custom analytics dashboard with plain HTML, JavaScript and Chart.js: KPI cards, a trend chart and a…
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SQL Queries for User Analytics (MySQL Examples)
Copy-paste SQL queries for user analytics in MySQL 8.4: DAU/MAU, sessions, funnels, retention cohorts and window functions, each…
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How to Centralize Server Logs for a Web App
Learn how to centralize server logs for a web app and turn nginx and app logs into analytics…
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How to Track Button Clicks and Form Submissions with JavaScript
Learn how to track button clicks and form submissions with vanilla JavaScript: event delegation, sendBeacon, keepalive and SPA…
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How Web Analytics Works: Tracking Pixels, HTTP Requests and Cookies
Learn how web analytics turns a page view into a database row: tracking pixels, HTTP requests, first-party cookies,…
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Async Communication for Distributed Engineering Teams
Learn how async communication works for distributed teams: channel rules, response-time agreements, decision threads, and a two-week rollout…
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How to Run Retrospectives That Actually Improve Things
Learn how to run retrospectives that improve things: data-first prep, a 60-minute agenda with timings, one owned experiment…
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LangChain 101: Chains, Prompts and the First LLM App
Build your first LangChain app with chains, prompts, and LCEL. Opinionated guidance on when a framework helps and…
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How to Motivate Engineers When Deadlines Are Tight
Learn how to motivate engineers under tight deadlines with Herzberg's two-factor theory, scope cutting, focus protection, and a…
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Testing Spring Boot Applications
Executive Summary: Most Spring Boot testing is plain JUnit 5 and Mockito: build the service directly and mock…
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Spring Security Basics
Executive Summary: Spring Security basics rest on two questions: authentication checks who is calling, and authorization decides what…
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Validation and Exception Handling in Spring Boot
Executive Summary: Bean Validation lets you put constraints like @NotNull, @Size, and @Email on fields and check them…
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HTTP, REST, and JSON in Java
Executive Summary: Java’s built-in HttpClient handles HTTP calls, and Jackson’s ObjectMapper turns JSON into records and back. I…
