The The Voleon Group Phone / Tech Screen interview is stage 2 of 7 in the The Voleon Group interview process, after the Online Assessment. Format: 45–60 min · HackerRank / phone. One hard LeetCode-style problem + an optimization follow-up, read from stdin / written to stdout with real test cases.
Preparing for this round? Practice the 8 questions mapped to the The Voleon Group Phone / Tech Screen, with worked solutions. A free account saves your progress.
What the Phone / Tech Screen tests
The single highest-frequency item is the Basic Calculator series (+−, then ×÷, then parentheses, then variable substitution, then resolving a dict of inter-dependent variable expressions via topological sort).
QuantVault maps 8 practice problems to this round. By topic, the biggest groups are coding (8); by difficulty, 0 easy, 6 medium and 2 hard. 6 of them were reported by candidates who interviewed at The Voleon Group, most recently in Mar 2023.
Who takes this round: Software Engineer candidates. See the full The Voleon Group process and who takes each round.
How to prepare for the Phone / Tech Screen
- Master the Basic Calculator series end-to-end — the parentheses and variable-dependency (toposort) follow-ups are where people stall.
- Read stdin / write stdout cleanly and run the real test cases — they expect production hygiene.
- Have the optimization ready — they always push on complexity after a working solution.
Further reading: How quant superdays work · Behavioral questions at trading firms · Market-making game interview guide.
Question types in this round
The 1 largest question types in the The Voleon Group Phone / Tech Screen practice set; across them the most common sub-topics are data structures, complexity analysis, greedy, sorting and searching, string algorithms. The questions themselves, with worked solutions, are in the round practice.
Coding8 in this round
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Frequently asked questions
What is the The Voleon Group Phone / Tech Screen interview?
It is stage 2 of 7 in the The Voleon Group interview process, after the Online Assessment. Format: 45–60 min · HackerRank / phone. One hard LeetCode-style problem + an optimization follow-up, read from stdin / written to stdout with real test cases. The single highest-frequency item is the Basic Calculator series (+−, then ×÷, then parentheses, then variable substitution, then resolving a dict of inter-dependent variable expressions via topological sort).
How long is the The Voleon Group Phone / Tech Screen interview?
Candidates report: 45–60 min · HackerRank / phone.
What questions come up in the The Voleon Group Phone / Tech Screen interview?
The practice set QuantVault maps to this round centers on coding.
How should I prepare for the The Voleon Group Phone / Tech Screen interview?
Master the Basic Calculator series end-to-end — the parentheses and variable-dependency (toposort) follow-ups are where people stall. Read stdin / write stdout cleanly and run the real test cases — they expect production hygiene.
What comes after the Phone / Tech Screen?
The Onsite / VO (stage 3 of 7). Format: 4 rounds · 1hr + 2.5hr coding + design.
Practice the The Voleon Group Phone / Tech Screen round
Work the 8 mapped practice problems with progress tracking, then move to the next stage of the The Voleon Group funnel.