Can candidates work on our tasks?

Yes. Teams can use their own tasks and configured interview environments. Build custom tasks in supported languages or start from the task library. Interview templates carry the environment, tasks and rubric, so every interviewer starts from the same setup.

Can we discuss architecture?

The interview workspace includes a whiteboard for system design discussions. The sketch is saved with the session alongside the code and the transcript.

Must every senior candidate take Screen?

Choose the assessment sequence for the role and hiring process. A live Interview can be the relevant starting point. When a candidate has completed a Screen assessment, creating an interview from the report carries their VS Code solution into the session.

Can candidates use Claude Code or Codex in the interview?

Yes, when the assessment allows it. Claude Code and Codex run in the VS Code terminal across Screen, Interview and Skills Intelligence. In Interview, both participants share one live terminal session and can work with it. The full interaction is saved to the candidate record.

Does AI make the hiring decision?

Supported tasks score against fixed rules. Reviewers inspect the work and applicable integrity signals. Interviewer rubric judgments are the interviewer's own. Codility gives your hiring team the evidence, and your team makes the final decision.

See how senior engineers reason through technical decisions

Assess senior engineers on real coding work, then interview them live with Claude Code or Codex. See how they debug and check AI output.

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Validated assessments since 2009 SOC 2 Type II ISO 27001

Live interview~/payments-service12 of 12 tests passed

Whiteboard

api›orders›read replicaredis cache

Decision logSample

08:12Architecture“Stale prices cost more than slow reads, so a read replica, not a cache.”

19:40AI outputRejected the agent’s retry loop: “that would charge the customer twice.”

31:05DebuggingTraced the flaky test to a timezone in the fixtures.

Technical tradeoffs1234Interviewer’s note: weighed consistency against latency, and said why.

Résumés and panel interviews make seniority easy to claim and hard to check

01

Seniority on a resume does not show how someone makes technical decisions

02

Separate interview exercises leave panels with different evidence

03

A correct result leaves questions about the reasoning behind it

Assess the work, then discuss the decisions

Agree on the criteria

Choose tasks and a rubric for the senior role. Use the library of 1,300+ validated tasks, including multi-file projects, or add your own. Professional Services can support custom assessment design.

Codility Interview template for a sample senior engineering role showing the selected environment, the tasks and the rubric criteria interviewers will score.

Codility Screen assessment report for a sample candidate showing task scores, the submitted code and the integrity signals panel.

Review practical work

Start with Screen for an asynchronous coding assessment. Candidates work in VS Code, and the report shows the solution and how it developed.

A full VS Code environment with a terminal and console
Allow the AI Assistant or turn it off for each task, and every prompt and response is saved

Explore Screen for engineering

Discuss the decisions

Use Interview to explore code, system design and tradeoffs in a shared VS Code environment with an Excalidraw whiteboard. Sidecar services such as databases and message queues run inside the session, so the discussion happens against a realistic setup. Claude Code and the Codex CLI are available across Screen, Interview and Skills Intelligence.

Explore Interview

Codility Interview session showing the shared VS Code environment with the Claude Code terminal open and both participants listed in the session.

Codility Interview session showing the shared VS Code environment with a sample candidate's code and the interviewer's rubric panel with criteria scored.

Bring evidence to the panel

Interviewers score against the rubric and explain their judgments. Review the transcript, work and AI usage before deciding. The report shows which AI skills the candidate used, quoting their own prompts, so the next interviewer can follow up on them. The record stays with the candidate for other interviewers and the hiring committee.

Direct evidence against the criteria you set

Senior hiring requires clear criteria and a record of the work and judgment behind each recommendation.

Structured real-world tasks give interview panels direct evidence against role criteria. Assessment platforms now use AI to grade answers and run interviews. Codility never lets an AI model score a candidate, and legal teams get a documented method to review.

Explore the assessment methodology

A published method, and an experience candidates rate well

Codility publishes its assessment methodology in a Technical Manual. Professional Services supports assessment design and local validation with the customer’s team.

87%

of candidates rate their Codility experience good or excellent.

Codility candidate survey, October 2025 to April 2026, 48,000+ candidate responses. Platform-wide results.

Before you change the senior interview

Bring the role and the decisions it requires

We will show you the tasks, the interview environment and the rubric your panel would work from.

Talk to us