TLDR DEV 2025-12-11

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HOW GOOGLE MAPS QUIETLY ALLOCATES SURVIVAL ACROSS LONDON'S RESTAURANTS - AND HOW I BUILT A DASHBOARD TO SEE THROUGH IT

Google Maps algorithms influence London's restaurant scene as it acts as a “market maker,” using prominence signals that create a cumulative advantage for some restaurants. This was done by scraping data from over 13,000 establishments and building a machine-learning model. To counter this, this dev developed a dashboard that identifies "underrated gems" by calculating the divergence between a restaurant's actual rating and its algorithmically predicted performance.

HOW TO IMPLEMENT IOS WIDGETS IN EXPO APPS

Despite widgets requiring native Swift code, you can use Expo and the `@bacons/apple-targets` plugin to integrate them together. This setup allows the React Native app and Swift widget to share data via App Groups and deep link back to the main app for expanded features.

GETTING A GEMINI API KEY IS AN EXERCISE IN FRUSTRATION

Getting a Google Gemini 3 Pro API key in the Google Cloud Console is unintuitive. This is because Google Cloud has many identically named products, a complex billing setup, and an identity verification process.

WHAT ACTUALLY MAKES YOU SENIOR

The one core skill that separates senior engineers from everyone else is the ability to reduce ambiguity. Senior engineers ask questions nobody else asks, separate what matters from the noise, and identify what should be done now. They're worth their salaries because they derisk projects. When senior engineers do this well, it looks easy.

NUCLEATE

Nucleate is an AI-powered platform that lets users build, customize, and export beautiful, production-ready React Native mobile apps from plain English descriptions. It has support for cloning, forking, and exporting apps, along with basic design system integration.

PYTHON WORKERS REDUX: FAST COLD STARTS, PACKAGES, AND A UV-FIRST WORKFLOW

Python Workers allow Python developers to ship Python globally in less than two minutes in a single command. Python Workers now supports any package supported by Pyodide, the WebAssembly runtime that powers Python Workers. It also now has dedicated memory snapshots to reduce cold start times. This post shares some of the technical details behind the changes.

AMAZON EC2 M9G INSTANCES

Amazon EC2 M9g instances offer the best price performance for general-purpose workloads.

TELL US WHAT YOU REALLY, REALLY… DO NOT WANT TO SPEND TIME WORKING ON

A survey by Stack Overflow explored developer frustrations amidst increasing AI adoption, finding that 84% currently use or plan to use AI, mainly for coding, searching, and debugging. However, developer problems aren't mainly from coding tasks themselves or AI's shortcomings, but rather from a lack of adequate and accessible documentation. Tasks like learning new codebases, deployments, and handling support tickets become frustrating due to fragmented and bad documentation efforts.

WHAT I LEARNED BUILDING A VECTOR DATABASE ON OBJECT STORAGE

Building something is a great way to learn. This developer rebuilt Turbopuffer, a vector database built entirely on object storage, to understand the tradeoffs made in its development. The post follows along as they figure out how to build a vector database from first principles.

automation that works.

INCOMPLETE LIST OF MISTAKES IN THE DESIGN OF CSS

VOXCSS

VoxCSS is a CSS voxel engine that renders customizable, interactive 3D grids of HTML cuboids in the DOM.

WIREBROWSER

Wirebrowser is a debugging, interception, and memory-inspection toolkit powered by the Chrome DevTools Protocol that unifies network manipulation, API testing, automation scripting, and deep JavaScript memory inspection into one interface.

THE (SUCCESSFUL) END OF THE KERNEL RUST EXPERIMENT

The Rust experiment in the Linux kernel has concluded, as Rust is now considered a core and permanent part of the kernel.