01 / 01

My resume scored 90/100. Oh wait — 74. No – 88.

HackerRank Open Sourced Its ATS

Hacker News Discussion

355 Points

02

What Happened

A real-world test of an open-source Applicant Tracking System

The Experiment Unfolds

  • 01
    HackerRank Open Sources ATS The company releases their Applicant Tracking System as open source
  • 02
    A Developer Tests It Uses their own resume to evaluate the scoring algorithm
  • 03
    Surprising Results Same resume, same system — three different scores
  • 04
    Community Reaction Story gains 355 points on Hacker News, sparking discussions

The Score That Kept Changing

90/100
First Try
74/100
Second Try
88/100
Third Try

Same resume, same ATS, different scores — highlighting inconsistency in automated screening

What This Reveals

psychology

ATS Inconsistency

Automated systems can produce varying results for identical inputs

gavel

No Standardization

Lack of transparency in how resume scores are calculated

groups

Candidate Impact

Real people's opportunities depend on these algorithms

code

Open Source Value

Public scrutiny reveals flaws that would otherwise stay hidden

If an ATS can't give consistent scores to the same resume,
how can candidates trust these systems
to fairly evaluate their qualifications?
Community Discussion

Expectations vs Reality

Expected
  • Consistent scoring algorithm
  • Deterministic results
  • Same input = Same output
  • Reliable screening tool
Reality The Gap
  • Fluctuating scores (90→74→88)
  • Unpredictable behavior
  • Same input = Different outputs
  • Questionable reliability

Key Takeaway

Open-sourcing ATS systems enables transparency — but also reveals the inconsistencies job seekers face every day.

Source: danunparsed.com/p/hackerrank-open-source-ats
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