Early screens that show who can actually build

Python

Starter~2h

For an Astral Pilot simulation, each cadet begins by generating a pilot profile they can fly with.

JavaScript

Advanced~4h

Calculate the date of scheduled deployment windows. Your team follows a recurring deployment schedule: releases go out on a specific day of the week each month. In this exercise, you will take a description of a deployment window date, and return the actual de…

TypeScript

Standard~3h

Use the Sieve of Eratosthenes to find all the primes from 2 up to a given number.

Go

Standard~2h

An internal post-mortem tool reconstructs incident chains. Each step in the chain describes an event and how it caused the next, building a cumulative narrative from the root cause forward.

Rust

Standard~3h

Your team maintains a mesh-network relay that transmits short text messages across low-bandwidth channels. Before transmission each message is woven — cleaned, arranged into a rectangular frame, then read column-by-column so characters are spread across time s…

Java

Starter~2h

Your field team communicates using a cipher handshake — a sequence of physical gestures encoded as a single integer. Each bit in the binary representation of the integer triggers a specific gesture:

Ruby

Starter~2h

Compile a standings table from match results for a small sports league. Given a list of match results, produce a formatted standings table. Each result line contains two team names and an outcome, separated by semicolons:

C#

Standard~3h

Correctly determine the fewest number of coins needed to make an exact target amount from a supplied denomination list.

C++

Standard~3h

Manage badge factory settings. When an access badge is issued, it starts out unnamed.