I applied in-person. The process took 2 weeks. I interviewed at Walmart (Barueri) in Jan 2014
Interview
The process was very long, but accurated. Firstly you will need to take an challenge, implementing an IT solution architecture to an specific problem. All solution technology and approach will be at your choice. You will have about 5 days to finish that.
After analyzed, your will need to defend and explain your choices. Usually this is the easiest step, if you did a great homework.
Interview questions [1]
Question 1
Explain how and when Cassandra and other No-SQL databases take advantage to SQL databases like Oracle, DB2, MS-SQLServer etc.
Surprisingly easy-going for a big name like Walmart. The interview started with a simple coding challenge focused on detecting cycles in directed graphs. I felt pretty relaxed during the technical rounds, which were straightforward and conversational. The wild part was recognizing the question as a close variant of one I had practiced on PracHub just days earlier. It definitely boosted my confidence. Overall, I was impressed with the process and was thrilled to receive an offer, which I happily accepted.
Interview questions [1]
Question 1
Course Schedule (detect a cycle in a directed graph using topological sort / DFS)
First, standard short phone call with recruiter. Then a 1-hour interview with an engineer on the team, asked about technical experience and background, and did a live coding assessment via video call. Fairly standard Leetcode style questions
Intense but rewarding — the interview for the Software Engineer position at Walmart Labs was tougher than I anticipated. The technical rounds included an LRU Cache implementation question where I had to articulate my design thoughts on thread safety, followed by a complex system design for a real-time inventory service. What made a difference in my prep were the company-specific prompts I found on prachub.com; they really helped me understand the types of questions I might face. Despite the challenging nature of the interviews, I ultimately received an offer but chose to decline.