Project-Based Take-Homes That Resist Cheating in 2 Hours

A practical design pattern for take-homes that reduce proxy work and AI copy-paste without punishing real candidates or slowing your funnel.

A time cap is not an integrity control by itself. The control is what you can reproduce, explain, and route when the submission looks too good for the clock.
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The take-home that looked perfect until week two

You fast-track a "can't miss" analytics candidate after a clean take-home: crisp charts, tidy repository, thoughtful write-up. Two weeks after onboarding, dashboards break, basic SQL requests stall, and every "quick question" becomes a Slack thread that smells like someone else is doing the work. By the time you unwind it, the blast radius is not just replacement cost. It is trust with stakeholders, roadmap slippage, and awkward internal conversations about why your process let a proxied or AI-generated submission through. By the end of this playbook, you will be able to design a project-based take-home that fits a strict time cap while generating integrity signals and a clear escalation path when something feels off.

Why time-capped projects beat puzzles when fraud is rising

Use project-based take-homes when you need evidence of real Day 1 execution: scoping, tradeoffs, reproducibility, and communication under constraints. Short, scoped projects also make it harder to "borrow" a pre-solved answer bank compared to standard puzzles. Risk context matters. Checkr reports that 31% of hiring managers say they've interviewed a candidate who later turned out to be using a false identity. Directionally, that implies identity risk is no longer edge-case noise for remote-friendly roles. It does not prove your team's fraud rate is 31% or that every role is equally exposed. Pindrop notes that 1 in 6 applicants to remote roles showed signs of fraud in one real-world pipeline. Directionally, that suggests remote pipelines should assume some level of adversarial behavior. It does not tell you which signals are most predictive in your specific funnel, so you still need instrumentation and review discipline.

  • Signal-to-noise: fewer "perfect" submissions that teach you nothing

  • Cycle time: predictable review effort, no surprise rework

  • Reputation: a process that feels respectful, not extractive

Ownership, automation, and systems of truth

Assign clear ownership before you redesign the assessment. Without it, you will oscillate between being too strict (false rejects) and too permissive (fraud leakage). Recommended operating model: Recruiting Ops owns workflow and SLAs, the Hiring Manager owns the rubric and calibration, and Security or GRC reviews the integrity policy and data retention controls quarterly.

  • Automated: time cap enforcement, submission metadata capture, plagiarism and similarity checks, environment reproducibility checks, identity gate completion status

  • Manual: rubric scoring, red-flag adjudication, step-up interview decisions, candidate appeals for false positives

  • ATS: candidate status, stage transitions, and decision audit trail

  • Assessment platform: prompt version, time-on-task, submission artifacts, integrity flags

  • Verification service: identity verification result and evidence pack references

Design a 2-hour project that produces defensible evidence

Start with a time cap you can defend, then design the prompt to be "complete at the cap" instead of "perfect when overworked". A project that requires heroics invites outsourcing and punishes honest candidates. A reliable pattern is a small, messy dataset or event log with one business question and one technical constraint. The output should include a reproducible command and a brief decision log that makes the candidate's thinking legible.

  • Inputs: a CSV or JSONL with 2000-10000 rows, plus a short schema note

  • Task: one metric definition + one segmentation + one sanity check (edge cases)

  • Constraint: run locally in under 2 minutes, no paid services required

  • Deliverables: README with run steps, results table, and a 10-bullet decision log

  • Inject a candidate-specific parameter at invitation time (example: a unique cohort key or feature flag) so copied submissions fail basic validation

  • Ask for one "assumption you would confirm with stakeholders" to surface real-world instincts

  • Require a single test that encodes their metric definition to prevent hand-wavy answers

Integrity signals that trigger step-ups, not auto-rejects

Treat integrity as a risk scoring problem, not a morality trial. Your goal is to route ambiguous cases into a fast step-up, while keeping clean candidates moving. The most useful signals are the ones you can explain in an audit: what was observed, why it is suspicious, and what you did next.

  • Reproducibility mismatch: "works on my machine" with missing dependencies or non-deterministic outputs

  • Inconsistent narrative: decision log claims an approach that is not reflected in code or results

  • Unnatural polish for the time cap: unusually broad scope completed without tradeoffs (flag for step-up, not instant fail)

  • Similarity spikes: high overlap with known public solutions or other submissions

  • Behavioral timing anomalies: submission appears immediately after start with complex output (could be prebuilt)

  • 15-minute walkthrough: candidate explains 2 key choices and reruns one command live

  • Targeted extension: give 30 minutes to add one sanity check or fix one failing test

  • Re-run with variant data: same task, different cohort key, confirm the workflow is real

A rubric that protects speed and reduces reviewer fatigue

Weight the rubric toward reasoning and reproducibility, because those are expensive to fake consistently at scale and correlate with Day 1 performance. Penalizing formatting and style encourages cosmetic perfection that is easy for generative tools to produce. Calibrate the rubric in a 30-minute session with 3 historical submissions (good, average, suspicious) so reviewers score consistently and you avoid random false positives.

  • Reproducible run + correctness checks (40%)

  • Decision quality and tradeoffs (30%)

  • Clarity of communication (20%)

  • Code hygiene appropriate to the time cap (10%)

  • Require one explicit data quality check (nulls, duplicates, outliers) and score it heavily

  • Ask for one "next query" they would run if they had another hour

A take-home integrity policy you can actually run

Write the policy down so it is enforceable, reviewable, and consistent across roles. The point is not more rules. It is fewer surprises and a clean audit trail when you step a candidate up. The artifact below is a practical configuration you can hand to Recruiting Ops and Security to implement consistent routing and evidence capture.

Anti-patterns that make fraud worse

These patterns increase funnel leakage, increase false positives, and train adversaries on your blind spots.

  • Unlimited time windows with "submit whenever" flexibility and no instrumentation

  • Zero-tolerance auto-rejects based on a single weak signal (example: similarity score alone)

  • Over-scoped projects that require nights and weekends, which pushes honest candidates to "get help"

Where IntegrityLens fits

IntegrityLens AI is built for teams that want project-based assessments without stitching together an ATS, a testing tool, and a separate verification flow. It combines ATS workflow + identity verification + fraud detection + AI screening interviews + coding assessments so your take-home stage is both fast and defensible. TA leaders and Recruiting Ops teams use IntegrityLens to automate stage movement, SLAs, and step-up routing. CISOs and Security teams use it to enforce consistent identity gates, review access, and evidence handling. In this specific use case, IntegrityLens helps you: verify identity in under three minutes before high-trust steps, run time-capped coding assessments, capture integrity signals as structured events, and generate Evidence Packs that explain why a candidate was stepped up or cleared. Key platform elements: - ATS workflow with auditable stage transitions - Biometric identity verification with typical end-to-end verification time of 2-3 minutes (document + voice + face) - AI screening interviews available 24/7 for follow-up and step-up questions - Technical assessments supporting 40+ programming languages - Security baseline including 256-bit AES encryption and GDPR/CCPA-ready controls

How to measure if your new take-home is working

Measure operational outcomes first, then quality. If you cannot keep review effort stable, your "integrity" redesign will quietly be rolled back. Track these weekly and review them in the same meeting as funnel conversion: step-up rate, step-up pass rate, reviewer minutes per submission, candidate complaints about scope, and the proportion of offers that required step-up adjudication. Use trends, not single-week spikes. If you need a starting point, an illustrative example target is keeping reviewer time under 20 minutes per submission and keeping step-ups to a small, reviewable queue. Do not treat those numbers as universal benchmarks. Tune them to your hiring volume and role criticality.

  • If your step-up pass rate is high, your signals are probably too sensitive or your rubric is unclear

  • If your step-up pass rate is near zero, you may be routing only obvious fraud and missing gray-zone coaching opportunities

Sources

31% false identity interview experience (hiring managers, 2025): https://checkr.com/resources/articles/hiring-hoax-manager-survey-2025 1 in 6 remote applicants showed signs of fraud (pipeline observation): https://www.pindrop.com/article/why-your-hiring-process-now-cybersecurity-vulnerability/

Related Resources

Key takeaways

  • Time caps work only when paired with evidence requirements and a structured review rubric.
  • Design for Day 1 work artifacts: decisions, tradeoffs, and reproducible outputs, not trivia or perfect code.
  • Treat integrity as a workflow: signals trigger step-ups, not automatic rejections.
  • Instrument the take-home so you can separate "open book" resourcefulness from outsourced or proxied execution.
Time-capped project take-home integrity policy (routing + evidence)yaml

Use this as a working policy for project-based take-homes with a strict time cap.

It defines required artifacts, integrity signals, and the step-up path so you avoid both rubber-stamping and zero-tolerance auto-rejects.

policy:
  name: "project-takehome-integrity-v1"
  stage: "assessment"
  role_families: ["analytics", "data", "product-analytics"]

controls:
  time_cap_minutes: 120
  allowed_resources:
    - "Open book: docs, search, prior notes"
    - "AI assistance allowed only if disclosed in DECISIONS.md"
  required_artifacts:
    - path: "README.md"
      must_include:
        - "How to run"
        - "Expected outputs"
        - "Time spent (minutes)"
    - path: "DECISIONS.md"
      constraints:
        max_words: 250
      must_include:
        - "Metric definition"
        - "Top 2 tradeoffs"
        - "1 assumption to validate"
    - path: "outputs/results.csv"
    - path: "scripts/run.sh"

integrity_signals:
  - id: "similarity-spike"
    description: "High similarity to known public solution or prior submission"
    severity: "medium"
    action: "step_up"
  - id: "reproducibility-fail"
    description: "run.sh fails or outputs are non-deterministic"
    severity: "high"
    action: "step_up"
  - id: "scope-too-broad-for-cap"
    description: "Submission includes features far beyond prompt scope with no stated tradeoffs"
    severity: "medium"
    action: "step_up"
  - id: "narrative-code-mismatch"
    description: "DECISIONS.md claims approach that is not reflected in code/results"
    severity: "high"
    action: "step_up"

step_up_flow:
  default:
    type: "live-walkthrough"
    duration_minutes: 15
    required_checks:
      - "Candidate reruns scripts/run.sh"
      - "Candidate explains 2 key decisions from DECISIONS.md"
      - "Candidate modifies 1 parameter (cohort_key) and re-generates results"
  escalation:
    if_failed: "secondary-assessment"
    notes: "Do not auto-reject on a single medium signal. Require two mediums or one high."

audit:
  log_events:
    - "assessment.invited"
    - "assessment.started"
    - "assessment.submitted"
    - "integrity.signal.raised"
    - "stepup.scheduled"
    - "stepup.completed"
    - "decision.recorded"
  retention_days: 180
  access:
    reviewers_roles: ["hiring-manager", "recruiting-ops", "security-reviewer"]
    pii_redaction: true

Outcome proof: What changes

Before

Take-homes varied by manager, scope frequently exceeded 4+ hours, and "perfect" submissions created post-hire performance surprises and difficult backchannel debates.

After

Standardized 2-hour project prompts with required decision logs and reproducible runs. Integrity signals routed a small subset to short step-up walkthroughs instead of blanket rejections.

Governance Notes: Legal and Security signed off because the process uses data minimization (only job-relevant artifacts), role-based access to review materials, defined retention windows, and an appeal path for false positives. Identity and assessment events are logged as an Evidence Pack so decisions are explainable without retaining unnecessary biometric data.

Implementation checklist

  • Set a hard time cap (and state what "done" looks like at the cap).
  • Require a short decision log and a reproducible run command.
  • Add a tiny personalization element that is fast but hard to outsource at scale.
  • Score with a rubric that weights reasoning and reproducibility over polish.
  • Define integrity signals and an escalation path (step-up interview, re-run, verification).

Questions we hear from teams

How short can a project-based take-home be and still work?
For analytics roles, 90-120 minutes is usually enough if you require a reproducible run plus a short decision log. The integrity value comes from constrained tradeoffs and explainability, not from building a large app.
Should we allow AI tools in take-homes?
Allow "open book" by default and require disclosure of AI assistance in a short decision log. Then score the candidate on reproducibility and reasoning, and use step-up walkthroughs when the submission quality is inconsistent with the time cap.
What is the fastest way to investigate a suspicious submission without being unfair?
Run a 15-minute step-up: ask the candidate to rerun the project, explain two decisions, and change one parameter to regenerate output. This is faster and more respectful than an accusatory email or an automatic rejection.

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