The interview process for a Senior Software Engineer position at Visa in India consisted of five rounds. The first round was a 90-minute HackerEarth assessment. The second round focused on data structures and algorithms, with questions on dynamic programming, binary trees, and multi-threading. The third round was another data structures and algorithms round, with questions on binary tree traversal and grouping anagrams. The fourth round was a design round, where the candidate was asked to design a payment service and a booking app. The final round was a director round, where the candidate discussed their current project, its flaws, and potential improvements. The candidate was also asked to design a high-level design for YouTube. The candidate received an offer after the interview process.