ZorixOS
2+ Toptal questions

Toptal interview questions and how to prepare

The questions candidates report from Toptal interviews, sorted by how often they come up, with difficulty and topics, plus original practice written in Toptal's interview style.

Practice Toptal questions free All companies

ZorixOS tracks 2 community-reported Toptal interview questions, drawn from an open-source dataset of real interview reports and sorted by how frequently each one comes up. Every question links to its source. Alongside them are 78 original ZorixOS practice questions written in Toptal's known interview style (not claimed as asked at Toptal), so you can rehearse the real format. Practice any of them out loud in a free AI mock interview tuned to Toptal.

Updated July 2026

Toptal interview questions candidates report

Community-reported from real Toptal interviews (open-source dataset), most-asked first. Showing 2. Each links to its source.

  1. Airplane Seat Assignment Probability
    MathDynamic ProgrammingBrainteaserProbability and Statistics
    Medium100% asked
  2. String Compression II
    StringDynamic Programming
    Hard100% asked

Practice questions in Toptal's style

Original ZorixOS questions written the way Toptal interviews, so you rehearse the real format. Not claimed as asked at Toptal.

  1. Imagine Toptal's freelance marketplace experiences a surge in demand for Swift developers in Europe. Design a system to efficiently match these freelancers with incoming client requests within minutes. Consider aspects like real-time availability, skill verification, and geographical proximity.

    Software EngineerSystem DesignTests: Evaluates the candidate's ability to design scalable and real-time distributed systems, considering specific business constraints.

  2. A client reports that their newly onboarded Toptal engineer is consistently delivering code with a high defect rate, impacting project timelines. How would you approach debugging this issue? Consider both the engineer's performance and potential systemic issues within our platform.

    Software EngineerDebuggingTests: Assesses problem-solving skills in a real-world scenario, focusing on identifying root causes and proposing actionable solutions.

  3. Toptal is considering expanding its AI/ML talent pool. Describe the architecture of a service that could automatically evaluate the quality of machine learning code submissions from freelancers, focusing on efficiency and accuracy.

    Software EngineerSystem DesignTests: Tests the candidate's understanding of building automated evaluation systems for complex technical domains.

  4. We are seeing an increase in 'ghost profiles' on Toptal, where freelancers create multiple profiles with slightly varied skills to game the system. How would you design a system to detect and prevent such fraudulent activity, considering the scale of our user base?

    Software EngineerSystem DesignTests: Examines the candidate's ability to design robust systems against adversarial behavior and maintain platform integrity at scale.

  5. Toptal's platform allows clients to search for freelancers. Describe the data structures and algorithms you would use to implement an efficient search functionality that handles millions of profiles and diverse search queries.

    Software EngineerCoding ReasoningTests: Assesses fundamental computer science knowledge and its application to optimize search performance for a large dataset.

  6. You are building a feature to showcase the 'top 1% of talent' on Toptal. Explain how you would define 'top talent' from a technical perspective and outline the data processing pipeline to identify these individuals. Consider potential biases.

    Software EngineerCoding ReasoningTests: Evaluates the candidate's ability to translate a qualitative concept into a quantitative, data-driven solution, including considerations for fairness.

72+ more Toptal-style questions are in the free library, each practiceable live with adaptive follow-ups and an honest scorecard. Start free.

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Toptal Interview Questions (2026) | ZorixOS