PhonePe Interview Prep

PhonePe interviews typically consist of 2-3 DSA rounds, 1 machine coding (LLD) round, and 1 system design (HLD) round for SDE-2 and above. The machine coding round is 90 minutes with a focus on design patterns, SOLID principles, and runnable code. System design rounds emphasize fintech-scale problems — payments, wallets, and event-driven architectures.

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HLD Problems Asked at PhonePe

#	Problem	Difficulty	Link
1	Digital Wallet	🔴 Advanced	Read →
2	Delayed Trigger Service	🔴 Advanced	Read →
3	Notification System	🟡 Intermediate	Read →
4	Distributed Job Scheduler	🔴 Advanced	Read →

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LLD Problems Asked at PhonePe

#	Problem	Difficulty	Link
1	Parking Lot	🟢 Beginner	Read →
2	Splitwise	🟡 Intermediate	Read →
3	Music Player	🟡 Intermediate	Read →

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Tips for PhonePe Interviews

1. Machine coding is make-or-break. PhonePe weighs the LLD round heavily. Practice writing clean, extensible code in 90 minutes with at least one Strategy pattern.
2. Expect fintech-specific deep dives. Idempotency, double-entry ledgers, reconciliation, and saga patterns come up frequently in HLD rounds.
3. Show concurrency awareness. PhonePe deals with high-throughput payment systems — discuss thread safety, distributed locks, and exactly-once semantics.
4. Keep your demo running. In machine coding, a working main() with sample output matters more than perfect code coverage.