For developers

Practice for technical roles

CodeArena is built for hiring teams, and developers get a public practice space to build durable skills hiring teams evaluate: role-based problem solving, language fluency, SQL depth, and prompt/model discipline. Employer assessments stay separate and employer-configured.

PracticePrep pathsProblems

Public prep, clear boundaries

CodeArena practice is for transparent skill building. It does not claim to mirror any employer's private interview process.

  • Prep paths are organized around transferable role and skill patterns, not company-specific question lists.
  • Employer assessments are configured separately by hiring teams for their own hiring process.
  • Practice helps you build language fluency, SQL depth, and prompt/model discipline without implying private interview access.

Practice Mode

Solve problems in a full-featured editor with instant test feedback. Pick your language, run your code, and track what you have completed.

  • 14 languages
  • Run against real test cases
  • Auto-saved progress
Start practicing

Problem Library

Browse 1000+ fundamentals-focused problems across algorithms, data structures, SQL, and more. Filter by difficulty, topic, and role.

  • Filter by difficulty & topic
  • Role-based tracks
  • SQL and ML coverage
Browse problems

Prep Paths

Follow focused tracks for software engineering, data science, data engineering, ML engineering, language fluency, SQL, and prompting.

  • Role-based preparation
  • Language proficiency
  • Prompting practice
Choose a path

What you get

  • Public practice for durable skill building
  • Real code execution across 14 languages
  • Curated problems from easy to hard
  • Public prep stays separate from employer assessments
  • Progress that follows you across sessions

Hiring engineers?

See how teams assess real coding skill with CodeArena.

For companies