Visa interviews are on par with FAANG standards, featuring medium to hard LeetCode-style coding problems. Dedicate 2-3 months to preparation, solving 150-200 problems, mastering system design basics for senior roles, and practicing Visa's Leadership Principles through behavioral stories.

Focus on core DSA: arrays, strings, linked lists, trees, graphs, dynamic programming, and recursion. Visa often applies these to fintech scenarios, such as transaction processing or fraud detection, so practice real-world problem-solving with these patterns.

Common errors include failing to ask clarifying questions, writing untested or inefficient code, and poor communication. Always confirm requirements, think aloud, write modular code with edge cases, and manage time effectively to avoid these pitfalls.

Demonstrate Visa's Leadership Principles like 'Customer First' with specific project examples. Show genuine interest in fintech by asking insightful questions about Visa's products, and highlight teamwork and adaptability in behavioral rounds to align with their culture.

The process usually takes 4-8 weeks with 3-5 rounds, and feedback per round takes 1-2 weeks. Delays may occur due to team scheduling, so follow up politely after 10 business days if no update is provided.

SDE-1 focuses on fundamental DSA and clean coding. SDE-2 adds system design for scalability and databases. SDE-3 emphasizes architectural design, leadership experience, and mentorship, with more strategic and case-based questions.

Use LeetCode with Visa-specific filters, study 'Grokking the System Design Interview', and review Visa's Leadership Principles on their careers page. Practice mock interviews on platforms like Pramp to refine communication and receive feedback.

Visa values collaboration, innovation in digital payments, and ethical practices. Show adaptability in fast-paced environments, emphasize continuous learning, and connect your experiences to their mission of secure global transactions to prove cultural fit.