
LotusFlare Backend Engineer Interview Questions
& Process
Real candidates share what happened, how many rounds they had,
and how the experience turned out.
Based on 10 interview experiences · FREE TO READ
Candidate interview experiences
First-hand accounts from people who interviewed at LotusFlare.
Backend Engineer
The interview had 4 stages. First, there was an HR call. Then, a tech round with general discussion and a short coding task focused on problem-solving, not typical LeetCode style. After that, a system design round where I had to design a messaging system. Next, a Team Lead conducted a behavioral interview asking about how I handle specific situations. Finally, there was a round with elements from all previous stages, minus the coding, mainly for final vetting and deeper dives. I liked the flow, it felt new and similar to big tech approaches, but wasn't too hard. Interviewers were nice, open, structured, and polite. The final round felt intentionally a bit off-balance, revisiting earlier topics and questioning my desire to join, and was less structured. I recommend preparing system design well, it really helps.
- Design a system to send various messages and notifications to end users, different from Kafka.
- Tell me about how you act in specific situations.
Senior Backend Engineer
We start with a recruiter screen to check your background, experience, and if you're a good fit. We'll chat about your career goals, tech skills, and if you know about our company stuff. Then you'll have two technical rounds. Each will have coding, focusing on algorithms, data structures, and making code better. They'll also cover system design – can you build big, fast systems and do you know design patterns? The second tech round gets more advanced with coding for real-world stuff and performance. System design here is about complex systems, keeping them reliable and easy to update. Finally, there's a leadership round. This is high-level system design to see your strategic thinking. We'll also talk about leadership, culture fit, how you communicate, and if you're aligned with our vision.
- Can you share your career aspirations?
- Tell me about your technical expertise.
- How familiar are you with our company's mission and products?
Backend Engineer
The interview involved Data Structure and Algorithms questions, Cloud cost optimisation questions, and grilling on my Resume and previous Experience. There was also an SQL query related question and a System Design discussion about my current company project.
- Tell me about Data Structures and Algorithms.
- How do you approach cloud cost optimization?
- Can you discuss your resume and past experiences?
LotusFlare Backend Engineer Interview Questions
Quoted word for word from LotusFlare interview reports.
“Can you determine if a given string reads the same forwards and backward?”
Read reports →“Design a system to send various messages and notifications to end users, different from Kafka.”
Read reports →“Can you design WhatsApp?”
Read reports →“How do you approach cloud cost optimization?”
Read reports →“Can you design a system for distributing messages?”
Read report →“Tell me about a BFS coding question.”
Read report →“Were there questions on other algorithm topics?”
Read report →“Were basic graph algorithms part of the questions?”
Read report →“How would you approach Leetcode-style problems, such as those involving DFS or BFS?”
Read report →Formats, difficulty and experience
Across all 10 LotusFlare interview reports.