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Harvey AI·Machine Learning Engineer·Technical Phone Screen·Senior

Senior
Apr 2026

Summary

ML engineer interview at Harvey AI that centered on a technical deep-dive into a past AI project. Pretty much the whole conversation was about one thing: walk us through something you built, then defend every choice you made.

Questions Asked (3)

Q1

Walk us through an AI-focused project you've worked on previously.

Technical Trade-offsProduct Analytics & Metrics
Author's notes

I had something prepped but the follow-up questions are where it gets uncomfortable.

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AI HintsAI Generated

Suggested Approach

Select a project where you made key technical decisions and can articulate the trade-offs. Structure your answer to show how you balanced model performance with product metrics, and highlight collaboration with cross-functional teams. Emphasize the impact on end-users and business outcomes.

Pro tip: Quantify the impact of your work using metrics that matter to the business, such as accuracy improvements, latency reductions, or cost savings. Also, briefly mention a lesson learned or a trade-off you'd revisit, showing self-awareness and growth mindset.

1. Set the Context

Briefly describe the project's goal, your role, and the team composition. Mention the problem it solved and why it mattered.

2. Explain Technical Decisions

Walk through the key technical choices you made, such as model selection, feature engineering, or infrastructure. Highlight alternatives considered and why you chose your approach.

3. Discuss Trade-offs

Articulate the trade-offs you navigated, such as accuracy vs. latency, cost vs. performance, or complexity vs. maintainability. Explain how you balanced them.

4. Highlight Product Metrics

Describe how you measured success using product and business metrics. Explain how you iterated based on these metrics and collaborated with product teams.

5. Share Outcomes and Learnings

Summarize the results with quantifiable impact. Reflect on what you learned and how you'd approach it differently next time.

Key Points to Mention

  • Problem definition and why it was important for the business or users
  • Model selection and rationale, including alternatives considered
  • Trade-offs between model performance and operational constraints (e.g., latency, cost)
  • Metrics used to evaluate success, including both technical and product metrics
  • Collaboration with cross-functional teams (product, engineering, design)
  • Quantifiable impact and lessons learned

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.

Q2

What alternative approaches did you consider, and why did you go with the technologies you chose?

Technical Trade-offsAdaptability & Ambiguity
Author's notes

This is where they pushed hardest.

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AI HintsAI Generated

Suggested Approach

Choose a specific ML project where you evaluated multiple technical options, and walk through the decision-making process. Highlight the trade-offs you weighed and how you validated your final choice, tying it back to business impact and constraints. Show that you can balance technical rigor with pragmatism.

Pro tip: Emphasize that you considered not just model performance but also operational factors like latency, cost, and maintainability—this shows you think like a product-minded engineer, which is crucial at a startup like Harvey AI.

1. Set the context

Briefly describe the project, its goals, and the key constraints (e.g., data size, latency requirements, budget). This helps the interviewer understand the decision environment.

2. List alternative approaches

Mention 2-3 distinct technical approaches you considered, such as different model architectures, libraries, or infrastructure. Explain why each was a viable option.

3. Evaluate trade-offs

Compare the alternatives on dimensions like accuracy, training time, inference speed, scalability, cost, and team expertise. Use concrete metrics or estimates where possible.

4. Explain your decision

State which approach you chose and why it best met the project's needs. Highlight any prototyping or experiments that validated your choice.

5. Reflect on outcomes and learnings

Share the results of your choice and what you would do differently next time. This shows self-awareness and continuous improvement.

Key Points to Mention

  • Specific technologies or models considered (e.g., BERT vs. GPT, PyTorch vs. TensorFlow, batch vs. real-time inference)
  • Quantitative trade-offs (e.g., 10% accuracy gain vs. 2x inference cost)
  • Alignment with business goals (e.g., time-to-market, scalability, user experience)
  • Team and resource constraints (e.g., existing expertise, available compute)
  • Validation through experiments or prototypes (e.g., A/B tests, offline metrics)
  • Long-term maintainability and operational considerations (e.g., monitoring, retraining)

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.

Q3

What were the pros and cons of the approach you took, and how well did it actually solve the problem?

Technical Trade-offsProduct Analytics & Metrics
Author's notes

Harder than it sounds when you're the one who built the thing.

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AI HintsAI Generated

Suggested Approach

Choose a specific ML project where you made a key technical decision, and structure your answer to clearly state the problem, the approach, its pros and cons, and the measured outcome. Be honest about limitations and show how you validated the solution with metrics and user feedback.

Pro tip: Quantify the trade-offs and results with concrete metrics (e.g., latency, accuracy, cost) and tie them back to business impact, such as improved user engagement or reduced operational costs. This demonstrates product thinking and engineering maturity.

1. Set the context

Briefly describe the problem, the constraints, and why it mattered to the business or users. Keep it concise to focus on the trade-offs.

2. Explain your approach

Summarize the technical approach you took, including key design decisions and alternatives considered. Highlight why you chose this path.

3. Discuss pros and cons

List the main advantages and disadvantages of your approach, comparing it to alternatives. Be specific about trade-offs in performance, cost, complexity, and maintainability.

4. Evaluate the outcome

Present how well the solution solved the problem using quantitative metrics (e.g., accuracy, latency, ROI) and qualitative feedback. Acknowledge any gaps or unexpected results.

5. Reflect and iterate

Share what you learned and how you would improve the approach next time. This shows growth mindset and continuous improvement.

Key Points to Mention

  • Specific metrics used to evaluate success (e.g., precision/recall, latency, cost savings)
  • Trade-offs between model complexity, inference speed, and accuracy
  • How the solution impacted end-users or business KPIs
  • Alternatives considered and why they were rejected
  • Lessons learned and potential improvements
  • Collaboration with cross-functional teams (e.g., product, data) to define success criteria

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.