Mercado Libre Backend Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 16 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at Mercado Libre.
Mercado Libre
Backend Engineer
Entry Difficult Positive experience No offer 2 rounds
Interview process
Take home Recruiter call
Interview formats
Technical Coding Other
First, they sent an email for two tests: a cognitive one (20 mins) and a technical HackerRank test with 12 questions in 1 hour 50 mins. The first question was a simple data structure exercise. The second was harder and took most of the time, involving API interaction with pagination via queries and a specific task. The rest were multiple-choice on data structures, testing, algorithmic complexity, HTTP, GitHub. The last question gave a scenario to solve with a prompt. After 3 weeks, they contacted me with job info, and I'm waiting for their email to proceed.
Confirmed questions1 question
- Given a sorted array of size n, what is the execution time of binary search?
Mercado Libre
Backend Engineer
Senior Difficult Neutral experience No offer 1 round
Interview process
Technical screen
Interview formats
Technical
This is an interview with a tech lead and a senior developer from the team. It's recommended to study and have clear theoretical concepts. The interview lasts about an hour.
Confirmed questions1 question
- How would you manage idempotent transactions?
Mercado Libre
Backend Developer
Mid Average Negative experience No offer 5 rounds
Interview process
Recruiter call Technical screen Take home Onsite Presentation
Interview formats
Technical Coding Presentation
The whole thing took over two months and had 5 interviews: Recruiter, Senior Devs, Project Lead, Project Manager, and Tech Lead. There was also a technical challenge (basic API). Communication was bad, and it went on hold for no reason. I only heard back when I reached out. Even though I spent a lot of time on it and got to the final stages with the leadership, the rejection was just a generic email. They weren't clear about the timeline and didn't seem to care about my time.
Confirmed questions4 questions
- Can you discuss best practices for Java development?
- What are your best practices for writing database queries?
- How would you approach building a scalable infrastructure?
Mercado Libre Backend Engineer Interview Questions
Quoted word for word from Mercado Libre interview reports.
“Given a sorted array of size n, what is the execution time of binary search?”
Read reports →“What are ACID properties?”
Read reports →“How do you use Java's Map and List?”
Read reports →“Cloud?”
Read reports →“Could you explain the importance of observability and metrics in system design?”
Read report →“Can you explain SOLID principles?”
Read report →“How would you manage idempotent transactions?”
Read report →“What are your best practices for writing database queries?”
Read report →“DevOps?”
Read report →Formats, difficulty and experience
Across all 16 Mercado Libre interview reports.