See how engineers actually work

Whiteboard interviews don't tell you much. Put candidates in a real codebase with an AI copilot and see what happens.

What makes Sponge different

Candidates solve real bugs and build real features in production codebases. Not algorithm puzzles.

Every candidate gets an AI copilot. You see how they use it, not whether they avoid it.

Same challenge, same tools, scored rubric. Compare candidates on substance, not gut feel.

Choose from the library or bring your own. Set a time limit.

Candidates get a browser-based IDE with an AI copilot. No setup.

See how they wrote code, how they used AI, and where they struggled.

No algorithm trivia. No multiple choice. Candidates work in a real codebase with real tools, the way they would on the job.

You wouldn't hire someone without testing their coding. Why hire without testing how they use the tools they'll use every day?

Candidates start immediately in the browser. You get a scored report, not a take-home you have to review yourself.

Set up a challenge in minutes. See what you learn.