TypeScriptTypeScript byteStandard~3h time-box

Contact Cleanup

You are cleaning imported contact records before they are saved into a CRM. Each record includes a freeform phone field entered by a human, so the data can contain spaces, dots, parentheses, hyphens, and an optional leading country code of 1.

Contact Cleanup
Step 1
Clone the starter repo
Candidate gets the full project locally — README, source, tests, runner config.
Step 2
Run the visible tests
Public test file is right there. Expectations are explicit from minute one.
Step 3
Make tests pass, push
Candidate works in their own style, pushes reviewable commits for your team.
Starter repo
What candidates clone
3 files
  • contact-number.test.ts
  • contact-number.ts
  • jest.config.js

The full README and the hidden test suite are available once you open the byte in your CodeSubmit workspace. Candidates never see the hidden tests.

Skills tested
parsingvalidationtext formattingtransforming
Difficulty
Standard

Standard engineering judgment. Multiple edge cases worth handling.