Coding tests that shortlist engineering candidates
Assess engineering candidates before the interview with Codility Screen. Review their coding work, scores and integrity signals to see who your engineers should meet.
Scope an assessment around your role or team.
Validated assessments since 2009 SOC 2 Type II ISO 27001
this week
Trusted by teams at
Most screening still happens in the interview, at your engineers’ expense
01
A resume gives you little evidence of how someone writes and checks code
02
Engineers spend interview time establishing skills candidates could demonstrate earlier
03
Reviewers need to understand the work behind a result
One assessment per role, from setup to shortlist
Choose work that matches the role
Choose from 1,300+ validated tasks across 80+ languages and frameworks, or add your own. Set tasks and time limits once, then reuse the assessment for the role. You can also use AI to find the right task for a job description.
Every library task is designed by occupational psychologists and mapped to the Codility Engineering Skills Model.
Decide whether candidates can use AI
Allow the AI Assistant or turn it off for each task, and every prompt is saved. Claude Code and Codex run in engineering assessments.
- Screen, Interview and Skills Intelligence all support Claude Code and Codex
- Identity verification, proctoring, similarity checks and behavioral signals are designed to feed one integrity risk rating for human review
- Available controls depend on the assessment type and configuration
See candidates build
Candidates work on real-world tasks in a coding environment, including VS Code for project work. Review their code and the recorded activity to understand how they approached the task.
When the shortlist moves to a live interview, the panel can start from the same work.
Send recruiters a score and a report they can act on
Selected task types score automatically against fixed rules. The report shows the score, the submitted work, integrity signals and AI usage in one place. It also shows which AI skills the candidate used, with quotes from their own prompts as proof, so a reviewer sees how well they use AI in seconds.
Supported applicant tracking system integrations return results and report links to the candidate record.
Take-home tests written by each team are hard to compare
Build a shared hiring process with reusable assessments, reviewable work and documented methodology.
No AI model scores a candidate, and a Technical Manual that follows APA Standards documents the method behind every result.
Candidates love us too
9 in 10
candidates say the assessment content is fair.
Codility candidate survey, October 2025 to April 2026, 48,000+ candidate responses across Codility assessments.
86%
of candidates say the assessment evaluated their skills well.
Codility candidate survey, October 2025 to April 2026. 47,496 responses to this question, across Codility assessments.
Before your next hiring round
See the assessment before your next hiring round
Bring one engineering role. We will show you the tasks, the report and the integrity evidence your team would review.