Mercor Interview Questions
We track 5 interview questions reported from Mercor: 3 in Coding & Leetcode-style Questions, 1 in MLOps & Deployment. They average 3.2/5 difficulty — medium for a working engineer — and every one was reported by someone who sat the loop, not written by us. The topics that come up most: mercor, llm-evaluation, ollama, cli. 1 were reported asked within the last year — most recently June 2026.
- Headquarters
- San Francisco, CA, USA
- Founded
- Founded 2023
- Employees
- ~100-150 employees
- Products
- AI-powered talent matching platform · Automated AI interviewing · Payroll and compliance for hired contractors
Question mix
- Coding & Leetcode-style Questions3
- MLOps & Deployment1
- Research & Paper Understanding1
Difficulty
- 2/5 — easy1
- 3/5 — medium2
- 4/5 — hard2
Asked for SWE (4), MLE (2), RS (1), Quant (1)
Topics Mercor asks about
3 open roles at Mercor
- Visual Design Lead — California, United States, San Francisco
- Mercor Research Fellowship — APEX — California, United States, London, New York City, San Francisco, United Kingdom
- Senior HR Business Partner, Engineering & Product — California, United States, San Francisco
Reported Mercor questions
Build an LLM Evaluation Harness with Ollama Integration
3/5Designed for machine learning infrastructure roles, this Mercor interview task asks you to build a functional evaluation harness integrated with local Ollama models within a tight timeframe. You will construct a command-line tool capable of ingesting validation prompts, querying specific language models, and automatically scoring outputs to generate comprehensive performance reports. This project measures your proficiency in API integration, software engineering tooling, and automated evaluation workflows. Unlock the full project instructions, evaluation metrics, and complete reference implementation by subscribing today.
MLOps & Deploymentmercorllm-evaluationollamaScreening round research chat
2/5This research-focused screening conversation with Mercor explores your technical background in large language model training, data curation methodologies, and empirical evaluation frameworks. The discussion evaluates how you assess dataset quality for specific capabilities such as mathematical reasoning, coding proficiency, and factual accuracy, alongside a deep dive into past technical hurdles you have successfully resolved. To view comprehensive interview preparation guides and expert insights for top research positions, unlock full platform access with a subscription.
Research & Paper Understandingasked June 2026Rank Top-K Users by Network Reach and Flow Centrality
4/5Investigate complex graph traversal and network analysis techniques to rank influential participants within a referral ecosystem, featured in interview sessions at Mercor. This task challenges you to calculate reach and centrality metrics across directed structures containing potential cycles, requiring robust cycle-detection and path-counting strategies. It is an exceptional test of advanced graph algorithms and performance optimization. Dive into the complete problem statement and optimal architecture by obtaining a subscription.
Coding & Leetcode-style QuestionsmercorExpected Network Size After N Days (Probabilistic Growth with Caps)
4/5This Mercor interview question delves into probabilistic modeling to estimate the growth of a referral network over time. You are tasked with calculating the expected total size of the network after a specified number of days, starting with an initial group of users. The model incorporates a daily probability for each person to successfully refer a new user, alongside a lifetime cap on the number of referrals any single individual can make. New users also contribute to growth under the same rules. This problem requires careful consideration of expected values and potentially dynamic programming approaches. The full problem description and a model solution are available with a subscription.
Coding & Leetcode-style QuestionsmercorImplement a Referral Network (Graph Design)
3/5Reported as an interview task from Mercor, this exercise involves designing a specialized data structure to manage directed relationships within a professional referral network. You will need to implement efficient methods for establishing connections and querying immediate associates or downstream candidates within the graph. This challenge examines your object-oriented design capabilities and graph traversal efficiency. Reviewing the complete requirements and optimal code architecture demands a paid subscription.
Coding & Leetcode-style Questionsmercor
Companies that ask similar questions
Mercor interview FAQ
- How many Mercor interview questions are available?
- 5 reported Mercor questions, the largest group being Coding & Leetcode-style Questions (3).
- How hard is the Mercor interview?
- Across the questions we track, Mercor averages 3.2 out of 5: 1 at 2/5, 2 at 3/5, 2 at 4/5.
- What topics does Mercor ask about?
- Most often mercor, llm-evaluation, ollama, cli, metrics.
- Are these Mercor questions still current?
- The most recent Mercor report here is from June 2026, and 1 were reported asked within the last twelve months. Dates come from the interview reports themselves, so they reflect when candidates actually sat the question.