— GUIDE —
QUANT PHONE AND ZOOM INTERVIEWS
A phone call can be a recruiter screen, a behavioral interview, or a full technical round. Work out which one you have before deciding what to practise.
UPDATED 2026-10-29 · 11 MIN READ · BY THE VARIANCE EDITORIAL TEAM
Check the invitation before you start preparing. A recruiter call usually covers your background and logistics. A technical call may ask you to solve problems aloud. If the email only says “conversation,” it is reasonable to ask what to expect.
Three calls that use the same calendar link
| Format | What it is trying to learn | What to have ready | Useful question to ask |
|---|---|---|---|
| Recruiter screen | Background, role fit, eligibility, office and timing | A short career story, dates, work authorization and deadlines | “Will the next round be technical, and in what format?” |
| Behavioral interview | Motivation, communication, teamwork and resilience | Three specific examples with your actions and result | “Which part of the role should I understand better?” |
| Technical interview | How you reason, compute, code or make decisions under uncertainty | Paper, pen, a tested coding setup if requested, and audible reasoning | “Should I expect coding, quantitative problems, or both?” |
What firms say officially
Official. IMC's graduate and intern guidance is unusually concrete. It says that candidates who pass the assessment and meet general criteria may have an initial behavioral interview by phone or Zoom, followed by a role-dependent technical interview and a final assessment day. IMC describes that first call as a conversation about you, your experience, the role, and life at the firm.
IMC's European process page adds motivation and your interpretation of the role to the first-round discussion. Jane Street describes its interviews as collaborative problem solving and says the structure varies by discipline. Optiver's interview guidance for engineers recommends reflecting on past projects, using STAR to make behavioral answers clear, and practising aloud. Those are firm statements. None of them creates a universal sequence for every quant employer.
What candidate reports can and cannot tell you
Individual reports, not firm policy. One 2026 applicant for a SIG North American trading internship said they were asked to have paper and a pen ready; another person in the discussion described a Pennsylvania interview with behavioral and expected-value questions. A separate 2025 new-graduate account describes a technical call followed by a recruiter call. These are individual accounts, not a fixed sequence.
The safe conclusion is narrow: the label “phone call” does not prove the call is nontechnical. The reports do not establish a fixed SIG process, and they say even less about another firm, office, or role. Ask the recruiter. If the answer stays broad, prepare for both a concise background conversation and a short technical problem.
How to prepare for the call
1. Decode the invitation
Write down the caller's role, scheduled length, platform, requested materials, and any words such as behavioral, technical,coding, or case. A request for paper, a shared editor, or screen sharing is useful evidence. When the wording is unclear, a one-line clarification is reasonable.
2. Prepare a 60-second account of yourself
Use the same order every time: what you study or do now, one piece of work that shows the relevant skill, and why this role is the logical next step. Do not recite the resume from the top. Give the interviewer a thread they can pull.
3. Pick three pieces of evidence
- A hard problem. What made it hard, what you tried, and what changed after your work.
- A mistake or failed approach. What you noticed and how your process changed.
- A collaborative decision. What you contributed when the team disagreed or the evidence was incomplete.
4. Practise the technical part out loud
Silent written practice is not enough. State the model, name the unknown, choose an approach, and then calculate. If the problem changes, say what the new information changes. Use the quant interview question set, probability questions, and market-making guide for representative practice rather than memorized firm questions.
How to behave during a technical call
- Restate the question and clarify the rules before calculating.
- Say which approach you are choosing and why.
- Keep units and assumptions visible on paper.
- Check whether the answer is plausible before declaring it done.
- If stuck, name the exact obstacle instead of going silent.
A collaborative interview gives the interviewer room to redirect you. Treat a hint as new information, not as a verdict. The useful response is to update quickly and continue.
The setup is part of the interview
- Join from a computer, test the exact meeting platform, and update it early.
- Use headphones or a microphone that does not echo.
- Put the camera at eye level with light in front of you.
- Close notifications and any apps that expose private information during screen sharing.
- Keep the recruiter's email and a phone hotspot available as backups.
- Join five minutes early, not twenty.
US and UK wording
US postings tend to say resume, while UK and European processes usually say CV. Phone screen, recruiter call,video interview, and first-round interview can all refer to overlapping formats. Do not infer the content from the regional label. Ask whether the round is behavioral, technical, or mixed.
Common misreads
“It is only a recruiter, so preparation does not matter”
A recruiter is deciding whether your application makes sense as a whole. An unclear role choice, unexplained deadline, or weak account of why you applied can end the process before the mathematics starts.
“Every technical call is a speed test”
Some are quick; others are deliberately conversational. Correctness, communication, and response to a hint can matter more than the first answer. Follow the interviewer's pace instead of manufacturing urgency.
“A polished script sounds prepared”
It usually sounds like a script. Prepare the facts and the order, then speak normally. Optiver's own guidance explicitly recommends being authentic rather than rehearsed.
After the call
Write down what was asked while it is fresh, including the point where your reasoning slowed. Send any requested material promptly. A short thank-you note is fine, then return to preparation for the next stage. If the firm gave a response window, wait for it. Otherwise one concise follow-up after roughly a working week is reasonable, but not an official deadline.
Sources and evidence
- Official, checked 29 October 2026: IMC, How to prepare for an interview.
- Official, checked 29 October 2026: IMC Europe, recruitment process.
- Official, checked 29 October 2026: Jane Street, Interviewing.
- Official, checked 29 October 2026: Optiver, interview tips for software engineers.
- Candidate discussions, trading roles, 2025–2026: report one, report two, and report three. The 2026 internship post identifies North America; the 2025 account does not clearly establish its region or cycle.
Revision history
29 October 2026: First publication. Official hiring pages and the cited candidate reports checked on the same date.
Frequently asked questions
What happens in a quant phone interview?
It depends on who is calling. A recruiter call usually covers your background, motivation, eligibility, location, and timing. A behavioral screen asks for evidence of how you work. A technical phone or Zoom interview can include probability, expected value, coding, statistics, or market-making problems. The invitation and recruiter are better evidence than the round's label.
Is a quant recruiter call technical?
Often it covers background, motivation, and logistics, but the format varies. A phone interview can also contain technical questions. Ask what to expect and keep paper, a pen, and a quiet workspace ready.
How should I prepare for a quant Zoom interview?
Confirm the format, prepare a 60-second account of your background, choose three examples that show problem solving and teamwork, review the skills named in the job description, and practise solving representative technical questions out loud. Test your camera, audio, screen sharing, and backup connection before the call.
Do I need to wear a suit for a quant video interview?
Usually no, unless the recruiter or invitation says otherwise. Clean, simple business-casual clothing is a safe default. The larger risk is poor audio, a distracting room, or joining late. Follow any firm-specific guidance over a general rule.
Should I send a thank-you email after a quant phone interview?
A short note is fine when you have a recruiter's contact details, but it is not a substitute for interview performance and is unlikely to change a technical decision. Thank them, mention one specific point from the conversation, and stop after two or three sentences.