Tools for developers

An automated review of your resume against what technical recruiters screen for, returning specific changes rather than a score. Useful as a first pass before you ask a human to look at it.

A directory of free APIs sorted by category, with authentication and CORS support noted for each. The fastest cure for not knowing what to build: pick an API that interests you and make something small with real data instead of another to do list.

Tell it how many weeks you have and how many hours a week, and it generates an ordered problem list that fits. The successor to the Blind 75, and it removes the planning problem entirely.

Animated visualisations of data structures and algorithms that you step through with your own input, covering sorting, trees, graphs, heaps and more. For anything you can follow in code but cannot picture.

A regular expression tester that explains each token as you type, highlights matches live and shows why a pattern failed. Turns regular expressions from guesswork into something you can debug.

A tool for running your own mentorship: bookable session types, payments, scheduling and a single link to share. Useful when the questions in your inbox have outgrown what you can answer for free.

Crowdsourced compensation data by company, level and location, with the level mappings that let you compare titles across employers. Walking into a negotiation without this is negotiating blind.

Browser support tables for every web platform feature, with real usage percentages rather than a simple yes or no. The answer to whether you can ship a feature yet, in about five seconds.

A spaced repetition flashcard tool, and the most effective way to stop forgetting the patterns and complexities you learned six weeks ago. Preparation spread over months fails on retention, not on comprehension.

A TypeScript toolkit for building AI features into web applications, with streaming, structured output, tool calling and a provider abstraction that lets you change models without rewriting. The practical default for AI in a JavaScript stack.

A free whiteboard that opens instantly with no account, which is what most remote design interviews and most design discussions actually need. Practise on the tool you will be handed rather than discovering it live.