Software development has changed.Has your hiring process?

Run a practical hiring assessment where candidates take on a real work sample and use AI coding tools like Claude Code or Codex to build and ship a working solution.

Assessment

Give candidates a real-world take-home project that tests on-the-job skills, with code your engineers can inspect, discuss, and extend in the next round.

Projects matched to your stack, seniority, and hiring rubric
Candidates work locally with Git or in CodeSubmit IDE with Claude Code, Codex CLI and many other harnesses
Automated AI review summarizes architecture, testing gaps, and follow-up prompts
Open the submitted repository directly in CodePair for live follow-up
Take-home challenge
Frontend Engineer Challenge
Terminal
$ git clone git.codesubmit.io/acme/frontend-challenge
$ cd frontend-challenge && npm install
$ git push origin main
→ Solution submitted
AI review ready
12 files reviewed · 4 follow-up prompts
Submission ready for reviewATS
Warden security check
Passed
AI review
12 files · 4 prompts
Senior Engineer pipeline

Trusted by engineering teams worldwide

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Platform

Assess the skills that ship product

Evaluate product engineers with real-world take-homes, timed coding screens, and live pairing in familiar tools.

Take-Home Challenges

Take-home projects in Git repos

Candidates work in a repository locally with Git or in CodeSubmit IDE in the browser. Your team gets the submitted code, automated AI review notes, and follow-up questions for the next round.

CodePair

Live pairing in a shared IDE

Interviewer and candidate share the same IDE, terminal, and AI chat, keeping the discussion anchored in runnable code.

Python
TypeScript
Java
Go
Rust
+19
Python, TypeScript, Go, Java, and more
Explore CodePair

Bytes

Timed coding screens for early rounds

Short, practical exercises test how candidates read requirements, write logic, and pass test suites before you assign a larger project.

Python
JavaScript
TypeScript
Ruby
Java
+7
Python, JavaScript, TypeScript, Ruby, and more
Explore Bytes

CodePair

See how candidates work in a full dev setup

CodePair gives interviewers and candidates a shared IDE, terminal, and repository so you can evaluate debugging, collaboration, and in-session AI use together.

  • →Shared workspace and project context: Navigate files, edit with multiple cursors, and talk through tradeoffs in the same repository.
  • →Shared AI chat: Both sides see the in-session AI conversation, including what candidates prompt and how they inspect, test, and refine generated code.
  • →Builds, previews, and debugging in one place: Run the application, inspect terminal output and failing tests, and work through fixes live.
  • →Direct handoff from take-home submissions: Open a candidate's completed take-home repository in CodePair to review their architecture, test coverage, and next changes together.

Familiar coding agents

Bring Claude Code, Codex CLI, and other coding agents into your live interviews and take-home workspaces. Your team decides which agents are available.

Explore the IDE
1M+
Challenges completed
500+
Engineering teams
40+
Languages & frameworks
4.8/5
Candidate satisfaction

Integrates with your ATS

Connect CodeSubmit with Greenhouse, Lever, Personio, Zapier, Ashby, and other tools to track candidates and assessment statuses in one place. Your team gets notified when submissions and interview results are ready to review.

Custom challenge drafting

Make the challenge fit the role

Challenge Creator turns a role brief or template into starter files, instructions, and a rubric that your engineers edit before sending to candidates.

  1. Describe the role

    Paste a role brief, describe the work you need done, or start from a library template.

  2. Creator drafts the challenge

    It builds the scope, starter files, candidate instructions, and grading rubric for your chosen format.

  3. Engineers review and send

    Your team inspects and edits the brief, files, tests, and rubric before sending it to candidates.

  • Take-Home
  • Byte
  • CodePair
Explore Challenge Creator

Role brief

Senior backend engineer, Python and FastAPI, payment webhook processing

Challenge draft

Payment Webhook Handler in FastAPI

Take-Home, Python repository with starter service

  • README
  • Tests
  • Rubric

Hiring workflow

Review the work before the next interview

Combine early screens, take-home projects, and live pairing in one workflow. AI helps structure the review while your engineers make the hiring call.

Choose the format

Use short coding screens or AI phone calls early, then move to real-world projects and live pairing when you want to see candidates build and debug.

Prepare the review

Automated summaries highlight architecture, test coverage gaps, and follow-up prompts before an engineer reads the diff.

Plan the next round

Use the candidate's code or interview answers to decide what to discuss in the next round.

Audi
Customer spotlight

Audi uses CodeSubmit to run realistic technical assessments and give candidates a more professional interview experience.

Set up your next technical interview

Start a free trial to explore the library or draft your first assessment. No credit card required.