HackerRank open sourced its ATS. My resume scored 90/100. Oh wait 74. No – 88
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HackerRank open-sourced its ATS (hiring-agent), but testing reveals extreme score variance: the same resume scored 66 to 99 across 100 runs at temperature 0.1, with project scores fluctuating wildly while technical skills and experience categories remain near-perfectly consistent. The tool uses gemma3:4b (or Gemini) to parse PDFs, extract structured data, and grade on open source (35 pts), projects (30), experience (25), and skills (10), but the experience rubric lacks anchors, awarding 25/25 to both a junior intern and a principal engineer. This non-determinism, even at temperature 0, makes hiring a luck filter rather than a merit assessment.
Dan Kinsky — FAANG engineer working on distributed systems. I write when something doesn't add up — usually things everyone's quietly agreed to stop questioning.