Issue No. 001·March 21, 2026·Seoul Edition
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FastFN

beta

A polyglot file-based runtime for building APIs and SPAs

webMarch 29, 2026
Developer ToolsWeb DevelopmentServerless
What It Does

Details

FastFN allows developers to build APIs and single-page applications using multiple programming languages in a single project. It provides a simple CLI and file-based routing system that supports Python, Node.js, PHP, Lua, Rust, and Go.

Who It's For

Best fit users

  • Small development teams
  • Developers wanting flexible runtime environments
  • Projects requiring multi-language API development
Why It Matters

Why this one made the cut

FastFN simplifies API and SPA development by allowing developers to use multiple programming languages in one project. It reduces complexity in project setup and provides a consistent development experience across different runtime environments.

Differentiator

What makes it different

Unlike traditional frameworks, FastFN supports mixing programming languages in a single API tree and provides automatic OpenAPI/Swagger documentation generation.

Sources

Where we found it

Sources

GLOBAL · Hacker NewsENMar 29, 2026Visit

First discovered Mar 29, 2026 · Hacker News