This PhonePe account is specifically for an SDE-1 backend role. It describes one technical round rather than a complete multi-stage process, so the page stays close to what the candidate actually shared.
SDE-1 backend technical interview
The candidate reported two DSA questions: Sort Colors, using the Dutch National Flag approach (source), and checking whether an integer is a palindrome with O(1) extra space (source). The same round included these backend fundamentals:
- What are HTTP methods, and how do POST and PUT differ? (source)
- What are the ACID properties of database transactions? (source)
- How do microservices differ from a monolithic architecture? (source)
- What is Kafka, how does it work, and where is it used? (source)
All six prompts are named in the PhonePe SDE-1 interview report on LeetCode Discuss (2025). The source says the interview covered DSA, system design, and backend fundamentals, but it does not publish a separate system-design prompt or describe additional rounds.
How to prepare for the PhonePe SDE-1 backend interview
The two coding questions test different habits: maintain the Dutch National Flag invariant while partitioning, and avoid converting the whole number to a string if the interviewer expects constant extra space. For the backend questions, prepare concise examples from systems you have built. A useful answer about Kafka, for instance, should connect producers, topics, consumers, and the reason a team chose asynchronous messaging.
This is one candidate's experience, not a current PhonePe interview specification. See system design interview questions for broader backend practice and the company experience hub to compare other reports.
Frequently asked questions
Does this PhonePe report describe the complete SDE-1 hiring process?
No. It covers one technical round and does not describe earlier or later stages. Use it for the six reported prompts, not as a complete or current hiring sequence.
Run it on Parlel
Keep the role and level from the opening visible as you prepare. Parlel's company directory can help you map PhonePe teams and hiring contacts.