# Software Engineer
**Role:** Software Engineer · **Level:** Software Engineer
**Company:** [Shopee](https://scaleengineer.com/companies/shopee)
**Difficulty:** Medium to Hard
**Salary:** US$70000 - US$120000
**Experience:** 1 - 5
**Timeline:** ~14 days
This interview process is designed to assess candidates for the Software Engineer role at Shopee. It evaluates technical skills, problem-solving abilities, cultural fit, and experience relevant to the position.
Canonical: https://scaleengineer.com/interviews/shopee/software-engineer-software-engineer
---
## Overall evaluation

- Technical Skills
- Communication & Collaboration
- Cultural Fit & Behavioral Aspects

## Questions asked

- Given an array of integers, find the contiguous subarray with the largest sum.
- Design a system to handle real-time notifications for an e-commerce platform.
- Tell me about a time you disagreed with a team member and how you resolved it.
- How would you optimize the performance of a web application experiencing slow load times?
- Explain the difference between TCP and UDP.
- Describe a project you are particularly proud of and your role in it.
- How do you approach testing your code?
- What are the challenges of working in a distributed team?
- If you were to build a recommendation engine for Shopee, what approach would you take?
- How do you handle production issues and debugging?

## Preparation tips

### lists

- Review fundamental computer science concepts (data structures, algorithms, operating systems, databases).
- Practice coding problems on platforms like LeetCode, HackerRank, or AlgoExpert.
- Study system design principles and common architectural patterns.
- Prepare for behavioral questions using the STAR method (Situation, Task, Action, Result).
- Research Shopee's products, services, and company culture.
- Understand Shopee's tech stack and relevant technologies.
- Prepare questions to ask the interviewer about the role, team, and company.

### studyPlan

- {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on core data structures (Arrays, Linked Lists, Stacks, Queues, Trees, Graphs, Hash Tables) and algorithms (Sorting, Searching, Dynamic Programming, Greedy Algorithms). Practice implementing these in your preferred language. Aim for at least 5-10 problems per data structure/algorithm type.","shortDescription":"Weeks 1-2: Data Structures & Algorithms fundamentals. Practice coding."}
- {"title":"System Design","longDescription":"Weeks 3-4: Dive into System Design. Understand concepts like scalability, availability, reliability, load balancing, caching, databases (SQL vs NoSQL), message queues, and microservices. Study common design patterns and practice designing systems like Twitter feed, URL shortener, or e-commerce platform.","shortDescription":"Weeks 3-4: System Design principles and practice."}
- {"title":"Behavioral and Situational Questions","longDescription":"Week 5: Prepare for Behavioral and Situational questions. Reflect on past projects and experiences. Use the STAR method to structure your answers for questions about teamwork, challenges, failures, successes, and leadership. Research Shopee's values and prepare examples that demonstrate alignment.","shortDescription":"Week 5: Behavioral questions preparation using STAR method."}
- {"title":"Mock Interviews and Final Review","longDescription":"Week 6: Mock interviews and final review. Conduct mock interviews with peers or mentors to simulate the actual interview environment. Review your notes, practice articulating your thoughts clearly, and refine your answers. Ensure you have a good understanding of Shopee's business and recent developments.","shortDescription":"Week 6: Mock interviews and final review."}

## Location differences

- {"location":"Singapore","differences":{"tips":["Research Shopee's presence and operations in your specific location.","Be prepared to discuss how your skills align with local business needs.","Highlight any experience working with regional teams or stakeholders."],"interviewFocus":["Understanding of local market nuances and customer behavior.","Experience with technologies prevalent in the specific region.","Adaptability to local work culture and team dynamics."],"commonQuestions":["How would you optimize a database query for a large e-commerce platform?","Describe a challenging technical problem you faced and how you solved it.","What are your thoughts on microservices architecture for Shopee's backend?","How do you ensure code quality and maintainability in a fast-paced environment?"]}}
- {"location":"Vietnam","differences":{"tips":["Familiarize yourself with Shopee's growth strategies in Southeast Asia.","Prepare to discuss case studies related to scaling and performance optimization.","Showcase your understanding of distributed systems and microservices."],"interviewFocus":["Deep dive into system design and scalability for high-growth markets.","Proficiency in cloud technologies (AWS, GCP) commonly used in the region.","Problem-solving skills related to large-scale data processing."],"commonQuestions":["Discuss your experience with scaling applications to handle high traffic volumes.","How do you approach designing a distributed system for an e-commerce application?","What are the trade-offs between different caching strategies?","Explain the principles of RESTful API design."]}}
- {"location":"Philippines","differences":{"tips":["Practice coding challenges on platforms like LeetCode and HackerRank.","Be ready to explain your thought process clearly during coding exercises.","Highlight your contributions to team projects and collaborative efforts."],"interviewFocus":["Emphasis on practical coding skills and algorithm implementation.","Understanding of software development best practices and methodologies.","Ability to collaborate effectively within a diverse engineering team."],"commonQuestions":["How do you handle concurrency and multithreading in your applications?","Describe your experience with CI/CD pipelines and automated testing.","What are your preferred methods for debugging complex issues?","How do you stay updated with the latest software development trends?"]}}

## Round 1: Coding Round
**Type:** Technical Interview (Coding) · **Difficulty:** Medium · **Duration:** 45 min
Coding assessment focusing on data structures and algorithms.
This round focuses on assessing your fundamental programming skills. You will be given one or two coding problems to solve, typically involving data structures and algorithms. The interviewer will evaluate your ability to write clean, efficient, and correct code, as well as your problem-solving approach and communication skills. Be prepared to explain your thought process, discuss trade-offs, and optimize your solution.
**Interviewers look for:** Clean and well-structured code.; Logical and systematic approach to problem-solving.; Correct implementation of algorithms and data structures.; Ability to explain the solution and its time/space complexity.
**Evaluation criteria:** Coding proficiency; Problem-solving approach; Understanding of data structures and algorithms; Code clarity and efficiency
**Common rejection reasons:** Inability to articulate thought process clearly.; Lack of fundamental programming knowledge.; Poorly written or inefficient code.; Failure to consider edge cases.
## Questions

- Reverse a linked list.
- Find the kth smallest element in an unsorted array.
- Implement a function to check if a binary tree is a Binary Search Tree.

## Preparation tips

- Practice coding problems on platforms like LeetCode.
- Understand time and space complexity (Big O notation).
- Be comfortable with at least one programming language.
- Think out loud and explain your approach before coding.

## Round 2: System Design Round
**Type:** System Design Interview · **Difficulty:** Hard · **Duration:** 60 min
Assesses ability to design scalable and distributed systems.
This round evaluates your ability to design and architect software systems. You'll be presented with a high-level problem (e.g., design a URL shortener, a social media feed, or an e-commerce backend) and expected to propose a scalable, reliable, and efficient solution. This involves discussing components, data models, APIs, trade-offs, and potential bottlenecks. Focus on demonstrating a structured approach and a deep understanding of system design principles.
**Interviewers look for:** Ability to design complex systems from scratch.; Understanding of trade-offs between different design choices.; Consideration of scalability, reliability, and maintainability.; Clear communication of design decisions and rationale.
**Evaluation criteria:** System design capabilities; Scalability and performance considerations; Understanding of distributed systems; Trade-off analysis; Database design; API design
**Common rejection reasons:** Inability to design scalable and robust systems.; Lack of understanding of distributed systems concepts.; Poor consideration of trade-offs and constraints.; Not addressing non-functional requirements adequately.
## Questions

- Design a system like Twitter's news feed.
- Design an API for an e-commerce product catalog.
- How would you design a distributed rate limiter?

## Preparation tips

- Study common system design patterns (e.g., load balancing, caching, database sharding).
- Practice designing various systems.
- Understand the pros and cons of different technologies (e.g., SQL vs. NoSQL, REST vs. gRPC).
- Be prepared to justify your design choices.

## Round 3: Behavioral Round
**Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Assesses past experiences, behavioral competencies, and cultural fit.
This round focuses on your past experiences, behavioral competencies, and cultural fit. You'll be asked questions about how you've handled specific situations in previous roles, such as dealing with conflict, overcoming challenges, or leading projects. Use the STAR method (Situation, Task, Action, Result) to provide clear and concise answers. The interviewer will also assess your motivation, career aspirations, and how well you align with Shopee's culture.
**Interviewers look for:** Examples of past behavior that predict future performance.; Ability to work effectively in a team.; Alignment with Shopee's core values (e.g., customer focus, ownership, innovation).; Self-awareness and willingness to learn.
**Evaluation criteria:** Behavioral competencies; Teamwork and collaboration skills; Problem-solving approach in past situations; Cultural alignment; Motivation and career goals
**Common rejection reasons:** Lack of self-awareness.; Inability to provide specific examples.; Negative attitude or blaming others.; Poor cultural fit or misalignment with company values.; Lack of enthusiasm for the role or company.
## Questions

- Tell me about a time you failed and what you learned from it.
- Describe a situation where you had to work with a difficult colleague.
- How do you prioritize your work when you have multiple competing deadlines?

## Preparation tips

- Prepare examples using the STAR method for common behavioral questions.
- Research Shopee's company values and culture.
- Be honest and authentic in your responses.
- Show enthusiasm for the role and the company.