Codility: Online Coding Tests & Technical Interviews
AI can write codenow. Hire the engineerswho can build
AI has changed how engineering teams deliver. The engineers who thrived two years ago may not be the engineers who thrive now. You need signal on who can build in this environment: your current team and your next hires.
Codility gives you that signal, backed by methodology that holds up when questioned.
Filter candidates before technical interviews
See how candidates work
Know what your engineering team can do
Trusted by GitHub, SpaceX, Tesla, EY, LSEG, SAP, Barclays, Citi.
Tailor your AI
Choose how AI fits in
AI is reshaping how engineering teams build, ship, and scale.
This is the new baseline. But not every team is in the same place, and not every role requires the same approach.
Codility lets you define how AI is used in your assessments. The real question is not whether someone uses AI tools. It is whether they can build with them.
We assess for the skills that matter in AI-native engineering:
- Prompt engineering that produces reliable output
- Knowing when to trust the machine and when to override it
- Evaluating and debugging AI-generated code
A growing library of AI-specific tasks built for real engineering roles. Not generic coding puzzles with an AI wrapper.
POWERED BY VS CODE
Real IDE, real signal
Assess in VS Code with full tooling: package installation, terminal access, multi-file projects, documentation.
You see how someone works, not how they cope with artificial constraints.
Automated code analysis evaluates quality, maintainability, and complexity. Two people can solve the same problem correctly. One writes code your team would be proud to maintain. The other creates technical debt from day one. Not just code that compiles. Code your team would merge.
Integrity means knowing who is at the keyboard, not policing which tools they use. Identity verification, impersonation detection, proctoring. The signal is the person.
81% of companies use skills-based hiring
94% say skills predict job success better than resumes
70% of employers now shifting toward skills-first hiring
90% report fewer hiring mistakes with skills-based hiring
See your team’s capability
For engineering leaders
Know what your team can actually do.
Skills Intelligence surfaces capabilities you did not know existed. Identify language and framework gaps across your organisation. Staff teams and projects on validated skills, not assumptions. Know what exists internally before you hire externally.
For engineers
Know where you stand. See where to develop.
Validated skills that travel with your career. A profile based on demonstrated capability, not self-assessment.
The platform
Screen
Candidates work through real problems in their own time. You get signal on who can build before your engineers are pulled into interviews.
Interview
Structured technical interviews in VS Code. You see how candidates actually work, not how they perform under artificial pressure.
Skills Intelligence
Map what your engineering organisation can actually do. Know what exists internally before you hire externally.
Customer stories
Codility powers over 20,000 engineering teams. From major enterprises to ambitious startups.
With Codility, our teams ran 750 candidate tests over 90 days, saving 2,200 hours of interview time. That kind of productivity is like gaining time to launch an entirely new product or enter a new vertical.
Codility helps us remove bias by ensuring a consistent, equal, and fair process for every candidate at LiveRamp.
Candidate stories
The assessment was well-designed and closely aligned with real-world data engineering tasks. It allowed me to demonstrate structured thinking across algorithms, SQL, ETL, and analytics in a practical setting. The instructions were clear and the platform was smooth to use.
The problem was practical and closely aligned with real-world scenarios. The platform was smooth, and the test cases helped validate edge cases effectively.
The platform was stable, the problems were clear, and the setup was easy. I appreciated how realistic the tasks were. They reflected real-world development scenarios rather than artificial puzzles.
Compliant, integrated, defensible
Assessments designed by I/O psychologists with documented methodology and auditable scoring.
SOC 2 audited. ISO 27001 certified. CCPA and GDPR compliant. WCAG 2.2 AA accessible.
Plugs into your existing tech stack, from applicant tracking to HRIS.
API access for custom workflows. Operational within four weeks.
See what your engineers can really do
Whether you are hiring your next engineer or understanding the team you already have, the first step is the same. Tell us what you are working on and we will show you how Codility can help you.