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Browse thousands of programming tutorials written by experts. Learn Web Development, Data Science, DevOps, Security, and get developer career advice.
Site URL: www.freecodecamp.org/news
Feed URL: www.freecodecamp.org/news/rss
Posts: 14
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How to Build Ephemeral PR Preview Environments on GKE with GitHub Actions, Ingress, and Automatic TLS
Published: October 15, 2026 13:35
Every team that ships software eventually builds a staging environment. And every team that builds a staging environment eventually discovers the same problem. Staging is shared. One environment, many
How to Give an AI Agent Safe Access to an Internal API with MCP
https://www.freecodecamp.org/news/how-to-give-ai-agent-safe-access-internal-api-mcp/
Published: October 15, 2026 05:02
Our on-call team keeps a small internal notes API. The web app in front of it shows who's holding the pager, which days are frozen for deploys, and where the runbooks live. A developer on that team wa
Secure by Design: How to Engineer Security into Architecture Before Writing Any Code
Published: October 15, 2026 05:00
There's a conversation that happens in most engineering teams,maybe usually too late. Think of this, a feature ships to production. A security review happens afterwards, or a penetration test finds so
How to Build Disaster Simulations on a Real Map: Animated Canvas Layers and Collapsing 3D Buildings with Mapbox GL JS and Three.js
https://www.freecodecamp.org/news/disaster-simulation-real-map-mapbox-three-js/
Published: October 15, 2026 04:40
At some point, a map project needs more than markers and polygons. You want something to happen on the map: water moving up a street, smoke drifting with the wind, or a shockwave spreading out from a
How to Stop an AI Agent from Inventing Nigerian Postcodes
https://www.freecodecamp.org/news/how-to-stop-an-ai-agent-from-inventing-nigerian-postcodes/
Published: October 14, 2026 15:32
On 1 October 2026, Nigeria's postcode changed from six digits to an 11-character code that identifies a single building, such as EK-01-A03-FK-01. Language models trained before that date still describ
How to Keep a File for Minutes, Not Years, on Cloud Run
https://www.freecodecamp.org/news/how-to-keep-a-file-for-minutes-not-years-on-cloud-run/
Published: October 14, 2026 04:08
A print job, a one-time download, or a support attachment typically only needs to exist until someone finishes with it. But most backends still store it like Google Drive: a named object, no expiry, a
The State of AI and Software Engineering: Code is Cheaper but Expertise are More Valuable [Full Book]
https://www.freecodecamp.org/news/the-state-of-ai-and-software-engineering-book/
Published: October 12, 2026 07:00
A report on AI productivity, human capability, software economics, SaaS defensibility, and the future of engineering work. Between 2024 and 2026, the marginal cost of producing a line of working code
What to Do When Your Constants Are Someone Else's Law
https://www.freecodecamp.org/news/what-to-do-when-your-constants-are-someone-else-s-law/
Published: October 11, 2026 14:05
A colleague once asked me why a number in my code had a comment three lines long. The number was 18. The comment said which rule it came from, which section notified it, and that it could change witho
How to Measure Conformance Between an Operational Specification and Its Execution
https://www.freecodecamp.org/news/measure-conformance-operational-specification-execution/
Published: October 11, 2026 09:46
In my previous article, I explored executor independence: the idea that different execution mechanisms should be able to satisfy the same operational specification. By executor independence, I mean th
How to Add Structured Data (JSON-LD) to a Next.js Site and Validate It
https://www.freecodecamp.org/news/nextjs-json-ld-structured-data/
Published: October 11, 2026 09:31
Structured data has always mattered to search engines. When a search engine reads your page, it sees HTML: a heading, some paragraphs, a date somewhere, a name somewhere else. Structured data tells it
Create Scalable AI Automations with n8n
https://www.freecodecamp.org/news/create-scalable-ai-automations-with-n8n/
Published: October 9, 2026 17:04
Most automation tutorials show you how to connect two simple apps and call it a day. But building workflows that companies can actually run in production requires an entirely different skill set, one
Master Modern React Routing: TanStack Router Crash Course
https://www.freecodecamp.org/news/master-modern-react-routing-tanstack-router-crash-course/
Published: October 8, 2026 15:21
Routing in modern web applications has evolved far beyond simply rendering a component based on a URL path. Developers today want end-to-end type safety, automated code splitting, seamless URL search
How to Create System Design Diagrams using Python
https://www.freecodecamp.org/news/how-to-create-system-design-diagrams-using-python/
Published: October 8, 2026 12:13
Creating system architecture design diagrams is an important part of technical documentation. As system complexity grows, clarity within teams becomes even more important. But creating diagrams from s
Build and Train a 25M Parameter LLM From Scratch on Your CPU
https://www.freecodecamp.org/news/build-and-train-a-25m-parameter-llm-from-scratch-on-your-cpu/
Published: October 8, 2026 02:02
You don't need a massive GPU cluster to learn how modern frontier AI works. In our new video on the freeCodeCamp.org YouTube channel, you will build, pre-train, and fine-tune a working 25-million para