DEV'S DAILY DIGEST

Development

How to Build a Browser-Based PDF Signature Tool Using JavaScript

PDF documents are commonly used for agreements, forms, approvals, invoices, reports, applications, and other documents that may need a signature or additional...

Bhavin Sheth - freecodecamp

How to Build a Multi-Tenant SaaS API with Node.js, RBAC, and Audit Logging

A colleague asked me to help debug what looked like a permissions issue in their SaaS project management tool. Users were seeing resources they hadn't...

Zia Ullah - freecodecamp

From Manufacturing to Microservices: Universal Lessons About Reliability

Software engineers often think reliability is a modern challenge. We discuss uptime, distributed systems, observability, and fault tolerance as if they belong...

Manish Shivanandhan - freecodecamp

How to Manage Secrets Securely with Azure Key Vault in Node.js

Last year a client called me about exactly this. Someone ran git log -p on a hunch and found a .env committed two years earlier, never caught. Database...

Zia Ullah - freecodecamp

Weaponizing And Defending The React Flight Protocol: Deserialization Sinks In RSCs

While React Server Components rely on the custom Flight protocol to stream interactive UIs, this same mechanism introduces powerful deserialization sinks that attackers can...

Durgesh Pawar - smashingmagazine

UI

How to Serve a Multi-User AI Agent with FastAPI and Streamlit

In this tutorial, I’ll show you how to serve a multi-user local AI agent as a REST API using FastAPI, then add a lightweight Streamlit UI on top. Instead of...

Darsh Shah - freecodecamp

Other

How to Use Apple’s Foundation Models in a Web App with a macOS Companion

Not every AI feature needs a cloud model, with its per-token bills, network round-trips, and private data leaving your machine. If you're on a modern Mac, a...

Balogun Wahab - freecodecamp

How to Optimize Enterprise Application Performance with T-SQL Query Tuning and Indexing Strategies

In this article, you'll learn how to optimize SQL Server performance using T-SQL query tuning, indexing strategies, execution plans, and real-world...

Gopinath Karunanithi - freecodecamp

HRV Data Is Everywhere. Here's What It Actually Means

Health data is having a moment. Of all the metrics receiving the most developer interest at present, there’s nothing like heart rate variability (HRV). It’s a...

Shradha Puri - freecodecamp

That's Embarrassing: Why Frontier AI Still Makes Things Up, and What to Do About It

It's mid 2026, and the best frontier models out there still hallucinate. I want you to gain two things from reading this article: understanding that AI...

Omer Rosenbaum - freecodecamp

How to Evaluate AI Agents with an LLM-as-a-Judge Harness in Python

In this tutorial, I'll show you how to evaluate a local AI agent with a simple, repeatable evaluation harness. The harness runs the agent against a set of...

Darsh Shah - freecodecamp