Log in Talk To Us

Technical skills assessment platform for real work_

Codility helps your hiring team assess engineering candidates on realistic tasks. You can review the evidence from screening and live interviews before making a hiring decision

Book a 30-minute demo
or see pricing
Candidate report Completed
87/100
Overall score · Real-Life task
Integrity risk
Low · reviewed
Debugging 92
API design 84
Data modeling 78
Testing 71
Inventory service Java · Spring 62 min
Submitted work
18  public Reservation reserve(Sku sku, int qty) {
19    if (qty <= 0) throw new BadRequest("qty");
20    var lock = locks.acquire(sku.id());
21    try {
22      var on_hand = stock.read(sku);
23      if (on_hand < qty) return Reservation.none();
24      stock.decrement(sku, qty);
25      return ledger.record(sku, qty);
26    } finally { lock.release(); }
27  }
Scored against the Codility Engineering Skills Model. Evaluation trail attached.
The candidate’s output and the evidence behind the result

Global enterprises that trust Codility include

Trusted by GitHub, SpaceX, Tesla, EY, LSEG, SAP, Barclays, Citi.

Codility provides assessment validation documentation for your team to review

G2 Leader, Enterprise
G2 Most Implementable, Enterprise
G2 Best Estimated ROI, Enterprise
G2 Fastest Implementation, Enterprise

Codility is rated 4.6 of 5 on G2 and ranked #1 for Enterprise Technical Skills Screening. Rankings come from verified customer reviews.

Today’s failing approach: resume review and ad hoc technical interviews

Resume-based screening

Employer names and qualifications can obscure a strong candidate whose resume does not match your usual profile.

Tasks disconnected from the role

An abstract exercise can leave your hiring manager needing another assessment of practical engineering skills.

Different interview criteria

Hiring managers who ask different questions and keep different notes can struggle to compare candidates fairly.

Scores without documentation

Your team needs the scoring criteria and validation evidence when a candidate, procurement team or legal reviewer questions a result.

One model, three products
Screen Interview Skills Intelligence
Applicants · Backend engineer 312 scored
CAND-0114 91
CAND-0087 84
CAND-0203 76
CAND-0156 62
One scoring model Engineering Skills Model

Assess engineers on real tasks and retain the evidence

Codility is a technical skills assessment platform for enterprise engineering hiring. Codility Screen supports applicant assessment, and Codility Interview provides the live technical round.

Your team can evaluate candidates against defined criteria across roles and regions.

Screen applicants on a role-relevant engineering task

Codility Screen gives you more than 1,300 validated engineering tasks across the technologies your business uses. Assessment engineers design the tasks, and occupational psychologists review them.

  • Selected task types score automatically.
  • Configurable proctoring and similarity checks provide integrity signals for a reviewer to investigate.
  • Your hiring team decides which applicants advance.

The difference: You can shortlist candidates using assessed ability alongside their applications.

Assessment setup Backend engineer · req 4192
Real-Life task
Build an inventory reservation API
Java · Spring · 60 min
Debugging
Fix a failing nightly sync
SQL
Reporting query under load
1,300+ validated tasks
Send via ATS
GreenhouseConnected
Lever
Ashby
Workday
SmartRecruiters
21 integrations
Candidate results from the same role-relevant assessment
Live interview Senior backend · round 2
reservation_service.py 
7  def reserve(sku, qty):
8      with lock(sku):
9          on_hand = stock.read(sku)
10         if on_hand < qty:
11             return None
12         stock.decrement(sku, qty)
13         return ledger.record(sku, qty)
$ pytest -q
11 passed, 1 failed in 2.41s
Rubric
Problem decomposition
Debugging under pressure
Communication
Transcript recording
The interview record behind a hiring manager’s evaluation

Give hiring managers a shared interview method

Codility Interview is the second stage: a live technical round for candidates shortlisted through Screen. The workspace includes shared VS Code with a terminal, dependencies and a whiteboard.

  • Your interviewers can evaluate candidates against the same rubric.
  • When configured, transcript and playback let your reviewers revisit the session.
  • You can enable or disable the AI Assistant per assessment, with every interaction captured as reviewable AI activity when enabled.

The difference: Hiring managers can compare their evaluations against the same criteria and revisit the session evidence.

Review the assessment methodology before a decision

Codility’s automated scoring is deterministic: the same submission earns the same result. Your hiring team makes the decision after reviewing the evidence.

  • The published Engineering Skills Model describes 210 skills and subskills.
  • Codility provides validation documentation prepared by assessment psychologists, and Professional Services supports customer-specific adverse impact analysis.

The difference: Your team can explain the assessment criteria and provide evidence for procurement and legal review.

Skills model Published · ungated
Software Engineering
Debugging Concurrency API design Data modeling Testing Observability
210 skills and subskills · ungated
Technical manual 96 pages · v6
4.2 Setting cut scores
Adverse impact
4/5 rule · pass ratio 0.91
96 pages · updated every 6 months
The scoring criteria and supporting validation evidence
Book a 30-minute demo

Candidate feedback on the assessment

Codility research found that 91% of candidates considered the content fair and 87% rated the assessment experience good or excellent.

Source: Codility post-assessment candidate feedback survey, 48,000+ responses, October 2025 to April 2026.

Frequently asked questions

What is a technical skills assessment platform?

A technical skills assessment platform evaluates engineering ability through structured tasks and provides results for hiring teams to review. Codility supports asynchronous screening and live technical interviews.

SOC 2 audited. ISO 27001 certified. CCPA and GDPR compliant. WCAG 2.2 AA accessible. EU and US data hosting.

Operational within four weeks.

Review the assessment process for your own roles

Bring a role you’re hiring for. Codility will show you the task, candidate result and supporting evidence in a 30-minute demo