Software Engineer

Software EngineerSDE3Hard

This interview process is designed to assess candidates for the Software Engineer (SDE3) role at Cashfree. It evaluates technical proficiency, problem-solving skills, system design capabilities, and cultural fit.

Rounds·4

Timeline·~7d

Experience·5 - 8 yrs

Comp band·US$180000 - US$250000

Interview time·225 min

Evaluation

What they measure.

  • Technical depth and breadth
  • Problem-solving approach
  • System design and architecture skills
  • Coding proficiency and best practices
  • Communication and collaboration skills
  • Cultural fit and alignment with company values

Preparation

How to prepare.

Tips

  1. Thoroughly review data structures and algorithms, focusing on time and space complexity.
  2. Practice coding problems on platforms like LeetCode, HackerRank, and GeeksforGeeks, targeting medium to hard difficulty.
  3. Study system design principles, common architectural patterns (microservices, event-driven), and distributed systems concepts (CAP theorem, consensus algorithms).
  4. Prepare to discuss your past projects in detail, highlighting your contributions, challenges faced, and solutions implemented.
  5. Understand core concepts of operating systems, databases, and networking.
  6. Be ready for behavioral questions that assess your teamwork, leadership, and problem-solving approach in real-world scenarios.
  7. Research Cashfree's products, services, and company culture to understand how your skills align.

Study plan

Fig · Study plan — 05 phases

01 / 05
01

Phase 01 of 05

Data Structures and Algorithms

Weeks 1-2: DSA fundamentals and practice.

Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash maps, heaps, and sorting/searching algorithms. Practice problems related to each topic, aiming for optimal solutions. Understand time and space complexity analysis.

Questions

Commonly asked.

  • Design a distributed cache system.
  • How would you design a rate limiter?
  • Explain the difference between SQL and NoSQL databases and when to use each.
  • Write a function to find the k-th largest element in an unsorted array.
  • Describe a situation where you had to deal with a production issue. What was your approach?
  • How do you approach code reviews?
  • What are the challenges in building a scalable e-commerce platform?
  • Discuss your experience with asynchronous programming.
  • How do you stay updated with new technologies?
  • Tell me about a time you disagreed with a technical decision. How did you handle it?

Locations

Regional differences.

Fig · Regions — 02 locations

01 / 02

Location

Bangalore

Interview focus

Deep understanding of distributed systems and microservices architecture.Experience with cloud platforms (AWS, Azure, GCP).Proficiency in designing scalable and fault-tolerant systems.Strong problem-solving and debugging skills in complex environments.

Common questions

  • How would you design a URL shortener service?
  • Explain the CAP theorem and its implications.
  • Discuss a challenging bug you encountered and how you resolved it.
  • How do you ensure scalability and reliability in your code?
  • Describe your experience with distributed systems.

Tips

  • Brush up on distributed systems concepts and common design patterns.
  • Be prepared to discuss your experience with specific cloud services.
  • Practice explaining complex technical concepts clearly and concisely.
  • Highlight projects where you significantly improved system performance or scalability.

Rounds

Round-by-round.

Expand a step for evaluation criteria, sample questions, and prep notes.

Hard

Data Structures And Algorithms Interview · 60 min · Senior Software Engineer

This round focuses on assessing your core programming skills. You will be asked to solve 1-2 coding problems, typically involving data structures and algorithms. The interviewer will evaluate your approach to problem-solving, your ability to write efficient and correct code, and your understanding of time and space complexity. Expect questions that require you to think critically and adapt your solutions.

What they look for

Strong analytical and problem-solving skills.Proficiency in at least one programming language.Ability to write clean, efficient, and maintainable code.Understanding of algorithmic complexity.Clear communication of thought process.

Evaluation

  • Correctness of the solution
  • Efficiency (time and space complexity)
  • Code quality and readability
  • Problem-solving approach
  • Ability to handle edge cases

Sample questions

  • Given a binary tree, find its inorder traversal.

    TreeRecursionIteration
  • Implement a function to find the median of a stream of numbers.

    HeapData Structures
  • Find the longest substring without repeating characters.

    Sliding WindowHash Map

Prep for this round

  1. 01Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium to hard difficulty.
  2. 02Ensure you can explain your thought process clearly while coding.
  3. 03Be prepared to discuss trade-offs of different approaches.
  4. 04Review common data structures and algorithms thoroughly.

Common rejection reasons

  • ×Inability to solve coding problems efficiently.
  • ×Poor understanding of fundamental data structures and algorithms.
  • ×Lack of clarity in explaining thought process.
  • ×Suboptimal solutions without considering complexity.

DSA

Coding questions at Cashfree.

Frequently reported on Cashfree loops

Other guides

More at Cashfree.