Fintech Software Engineer interview questions

Position: Software Engineer – Backend Interview Experience: Positive Outcome: Offer Accepted Location: Bangalore, India Application Method: Applied through campus placement Interview Process: 1. Online Assessment (90 mins) Platform: HackerRank Sections: 2 Coding Problems (Medium-Hard level, focused on data structures like graphs, dynamic programming) 10 MCQs (covering OS, DBMS, Java fundamentals, and time complexity) Tip: Know your basics and practice competitive coding. 2. Technical Interview 1 (DSA + OOPs – 60 mins) Interviewer asked me to solve: One problem on LRU Cache (design using HashMap + Doubly Linked List) One sliding window problem Follow-up questions on time and space complexity OOP discussion: Real-world examples, SOLID principles 3. Technical Interview 2 (System Design + DBMS – 60 mins) Designed a simple payment gateway system (focus on APIs, rate limiting, security) Normalization and SQL joins Discussed indexing, transaction isolation levels Briefly talked about Kafka and message queues 4. Managerial Round (Behavioral + Scenario-Based – 45 mins) Asked about handling production failures, debugging under pressure Scenario: “What if your code caused a payment failure across thousands of users?” Questions on teamwork, ownership, learning from mistakes Also tested my interest in FinTech domain (KYC, payments, fraud detection) 5. HR Discussion (30 mins) Salary discussion, notice period, and joining timeline Asked about career goals, flexibility with location Very friendly and transparent interaction

the interview was very tough as a fresher they take three rounds and you have to be very confident with it if and only if you pass the first round of the interview they take you on second