Fintech · Noida

Paytm.

Payments app with UPI, wallet, merchant QR and soundbox, plus lending, ticketing, travel and stock broking (Paytm Money).

its questions lean on

payments and wallets
booking concurrency
risk checks
caching and locking
real-time market data

The rounds, as candidates describe them

Online assessmentHackerRank test with two coding questions and DSA multiple-choice questions.source ↗
DSA interviewData-structure problems with a senior engineer.source ↗
System design and hiring managerSenior loops add LLD plus HLD with API, database and concurrency discussion, then a techno-managerial round.source ↗

Reported by candidates

From public interview write-ups; each links its source.

Design a stock market tick-stream system for millions of usersSystem design
SQ-13 · Zerodha Kite Trading Platform →W08 · DAY 01 · Event Ingestion at Scale →W03 · DAY 03 · Backpressure and Flow Control →reported in:LeetCode Discuss · Paytm Senior Software Engineer HLD round (2026) ↗
Design a Ticket Booking SystemSystem design
SQ-16 · BookMyShow Seat Booking →LLD-05 · Design a Movie Ticket Booking System →reported in:LeetCode Discuss · Paytm SSE interview experience, Ticketmaster (2026) ↗LeetCode Discuss · Paytm interview experience, BookMyShow-like app (2024) ↗
Design order management and payments for a shipping platform like ShiprocketSystem design
W03 · BOSS · Event-Driven Food Delivery Order System →W05 · DAY 02 · Distributed Transactions — The Saga Pattern →IP-20 · Design a Payment System →reported in:LeetCode Discuss · Paytm SSE interview experience, selected (2025) ↗
Design a travel booking service like Cleartrip with premium membershipSystem design
IP-19 · Design a Hotel Reservation System →W04 · DAY 05 · Multi-Tier Caching →reported in:LeetCode Discuss · Paytm SDE-2 face-to-face interview experience (2025) ↗
Design a payments risk management serviceSystem design
W08 · DAY 02 · Streaming vs Batch Processing →W02 · DAY 01 · Timeout Hell →reported in:LeetCode Discuss · Paytm SDE-2 face-to-face interview experience (2025) ↗
Design an ETA calculator by vehicle typeLow-level design
no lesson for this one yetreported in:LeetCode Discuss · Paytm SDE-2 face-to-face interview experience (2025) ↗
Design an LRU CacheLow-level design
LLD-02 · Design an LRU Cache →reported in:LeetCode Discuss · Paytm SDE-2 interview experience, thread-safe LRU (2026) ↗LeetCode Discuss · Paytm SDE-1 interview experience (2025) ↗
Design a UPI-like payment app (LLD)Low-level design
SQ-01 · India's UPI →IP-20 · Design a Payment System →reported in:LeetCode Discuss · Paytm SDE-1 interview experience (2025) ↗
Pessimistic vs optimistic locking and transaction isolation levelsConcept
W05 · DAY 01 · Consistency Models →reported in:LeetCode Discuss · Paytm SDE-1 interview experience (2025) ↗
Design a Rate LimiterSystem design
IP-02 · Design a Rate Limiter →W01 · DAY 03 · Rate Limiting at Scale →reported in:LeetCode Discuss · Paytm SSE, lending team, hired (2023) ↗
Sharding, SQL vs NoSQL, and ACID vs CAPConcept
W01 · DAY 01 · Partitioning Deep-Dive →W00 · PART 6 · System Design Terminology & Theory →reported in:LeetCode Discuss · Paytm SSE, lending team, hired (2023) ↗
Design a Bingo gameLow-level design
no lesson for this one yetreported in:LeetCode Discuss · Paytm interview experience, DSA + LLD round (2024) ↗

Likely, from what they build

Our pick, not a report: questions that fit Paytm's products.

Design a Digital WalletSystem design
IP-20 · Design a Payment System →W02 · DAY 02 · Idempotency in Practice →W03 · DAY 05 · Audit Log System →
Design a Payment SystemSystem design
SQ-01 · India's UPI →IP-20 · Design a Payment System →

Study path

Every lesson the questions above point to, once, in order.

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