Katkat

Company

Hadrian interview questions

3 practice questions in the style of Hadrian's interviews, covering Software Engineering Fundamentals, System Design, Coding & Algorithms.

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Hadrian interview questions by the numbers

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Katkat has 3 Hadrian interview questions. The largest topics are Coding & Algorithms (33%), Software Engineering Fundamentals (33%) and System Design (33%). By difficulty: 100% hard. The most common round is Onsite (67%). Frequent concepts include Algorithms, CDC, Consistency and Data Structures.

Topics

Difficulty

  • Hard100% · 3

Interview rounds

  • Onsite67% · 2
  • Technical Screen33% · 1

Roles

  • Software Engineer100% · 3

Frequent concepts

  • Algorithms33% · 1
  • CDC33% · 1
  • Consistency33% · 1
  • Data Structures33% · 1
  • Database Migration33% · 1
  • Graphs33% · 1

Showing 1–3 of 3 results

  • Design a Rule-Driven Process Graph ValidatorHard

    This problem tests your ability to model dependency constraints in a directed graph and implement an efficient algorithm to validate that a given execution sequence satisfies all structural and ordering requirements.

    HadrianSoftware EngineerSoftware Engineering FundamentalsOnsite
  • Migrate a Continuously Used DatabaseHard

    This question tests your ability to design a zero-downtime database migration strategy that handles heterogeneous database engines while maintaining strict data consistency across concurrent read and write operations.

    HadrianSoftware EngineerSystem DesignOnsite
  • Work Order Lead Time: Critical Path Through an Operations DAG to ShippingHard

    A manufacturing work order is modeled as a directed acyclic graph of operations with durations in days, and every path ends at one shipping node. Compute the total lead time as the critical path length from any starting operation to shipping. It tests graph modeling, dependency ordering and longest-path reasoning.

    HadrianSoftware EngineerCoding & AlgorithmsTechnical Screen

Hadrian interview experiences

All 1 →
  • Three Rounds Ending in an On-site Factory Tour and a DAG Critical-Path ProblemHadrian · Software Engineer · Onsite · Sep 2026

    Applied online and a recruiter reached out. Their process is like this: Round 1 1 hr live coding phone screen Round 2 45-min leadership/behavioral with an engineering director 60-min system design Round 3 On-site in Torrance with a factory tour 30-min "partnership" interview (working with non-technical stakeholders) 1 hr coding Problem: A work order is modeled as a DAG. Nodes are operations (mach…

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