# Software Engineer
**Role:** Software Engineer · **Level:** L4
**Company:** [smartnews](https://scaleengineer.com/companies/smartnews)
**Difficulty:** Medium to Hard
**Salary:** US$110000 - US$150000
**Experience:** 3 - 7
**Timeline:** ~14 days
The Software Engineer L4 interview process at SmartNews is designed to assess a candidate's technical proficiency, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds, including technical assessments, system design, and behavioral interviews.
Canonical: https://scaleengineer.com/interviews/smartnews/l4-software-engineer
---
## Overall evaluation

- Technical Proficiency
- System Design Capabilities
- Behavioral and Cultural Fit

## Questions asked

- Tell me about a time you had to deal with a complex technical challenge.
- How would you design a system to recommend news articles to users?
- What are the key principles of object-oriented programming?
- Describe your experience with cloud platforms like AWS or GCP.
- How do you stay updated with the latest technologies?
- Explain the difference between concurrency and parallelism.
- What are your strengths and weaknesses as a software engineer?
- How do you approach debugging a production issue?
- Design a rate limiter for an API.
- What is your experience with testing methodologies?

## Preparation tips

### lists

- Review fundamental data structures and algorithms.
- Practice system design problems, focusing on scalability and trade-offs.
- Prepare behavioral questions using the STAR method (Situation, Task, Action, Result).
- Research SmartNews's products, mission, and recent news.
- Understand the company's tech stack and common architectural patterns.
- Prepare questions to ask the interviewer about the role, team, and company culture.

### studyPlan

- {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on core data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, graph traversal). Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium to hard difficulty.","shortDescription":"Weeks 1-2: DSA Fundamentals (Arrays, Trees, Graphs, Sorting, Searching, DP). Practice LeetCode Medium/Hard."}
- {"title":"System Design","longDescription":"Weeks 3-4: Dive into system design concepts. Study topics like scalability, availability, consistency, load balancing, caching, databases (SQL vs. NoSQL), message queues, and microservices. Work through common system design case studies.","shortDescription":"Weeks 3-4: System Design (Scalability, Databases, Caching, Microservices). Study case studies."}
- {"title":"Behavioral Preparation","longDescription":"Week 5: Prepare for behavioral interviews. Reflect on past experiences related to teamwork, problem-solving, leadership, and handling challenges. Practice articulating these experiences using the STAR method.","shortDescription":"Week 5: Behavioral Interview Prep (STAR method, past experiences)."}
- {"title":"Company Research","longDescription":"Week 6: Research SmartNews thoroughly. Understand its business model, products, target audience, and recent developments. Prepare insightful questions for the interviewers.","shortDescription":"Week 6: Company Research & Question Preparation."}

## Location differences

- {"location":"Tokyo","differences":{"tips":["Familiarize yourself with SmartNews's tech stack and products.","Prepare to discuss your experience with scalable systems and high-traffic applications.","Be ready to articulate your design choices and justify trade-offs.","Practice explaining complex technical concepts clearly and concisely.","Showcase your ability to collaborate and communicate effectively."],"interviewFocus":["Deep understanding of distributed systems.","Experience with large-scale data processing.","Proficiency in cloud technologies (AWS, GCP).","Strong problem-solving and debugging skills.","Ability to mentor junior engineers."],"commonQuestions":["How would you design a URL shortener service?","Explain the CAP theorem and its implications.","Describe a challenging technical problem you solved and how you approached it.","What are the trade-offs between SQL and NoSQL databases?","How do you handle concurrency in your applications?"]}}
- {"location":"Remote","differences":{"tips":["Highlight projects where you've demonstrated leadership or initiative.","Be prepared to discuss your contributions to team success.","Showcase your understanding of software development best practices.","Research SmartNews's global presence and its impact.","Emphasize your adaptability and willingness to learn."],"interviewFocus":["Experience with agile development methodologies.","Proficiency in modern web frameworks and languages.","Understanding of CI/CD pipelines.","Ability to work independently and take ownership.","Strong communication and teamwork skills."],"commonQuestions":["Design a system to handle real-time news feed updates.","How would you optimize a database query for a high-traffic website?","Discuss your experience with microservices architecture.","What are your strategies for ensuring code quality and maintainability?","Describe a time you had to deal with a production issue under pressure."]}}

## Round 1: Data Structures and Algorithms
**Type:** Technical Interview (Coding) · **Difficulty:** Medium · **Duration:** 45 min
Assess fundamental programming skills with coding problems on data structures and algorithms.
This round focuses on assessing your fundamental programming skills. You will be asked to solve coding problems that test your knowledge of data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming, recursion). The interviewer will evaluate your approach to problem-solving, your ability to write clean and efficient code, and your understanding of time and space complexity.
**Interviewers look for:** Strong understanding of data structures and algorithms.; Ability to translate a problem into code.; Logical thinking and systematic approach to problem-solving.; Clean and efficient coding style.
**Evaluation criteria:** Correctness of solution; Efficiency of solution (time and space complexity); Code clarity and readability; Problem-solving approach
**Common rejection reasons:** Inability to articulate thought process.; Lack of fundamental DSA knowledge.; Poor coding practices.; Inability to solve basic algorithmic problems.
## Questions

- Given an array of integers, find the two numbers that add up to a specific target.
- Implement a function to reverse a linked list.
- Find the kth smallest element in a binary search tree.
- Given a string, find the length of the longest substring without repeating characters.

## Preparation tips

- Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium difficulty.
- Review common data structures and algorithms.
- Practice explaining your thought process while solving problems.
- Ensure your code is well-structured and readable.

## Round 2: System Design
**Type:** System Design Interview · **Difficulty:** Hard · **Duration:** 60 min
Assess ability to design scalable and distributed systems, focusing on architecture and trade-offs.
This round evaluates your ability to design large-scale, distributed systems. You'll be presented with a problem (e.g., designing a social media feed, a URL shortener, or a notification system) and expected to propose a robust and scalable solution. The focus is on your understanding of system components, data flow, database choices, caching strategies, load balancing, and fault tolerance.
**Interviewers look for:** Ability to design complex, scalable, and reliable systems.; Understanding of distributed systems principles.; Knowledge of various architectural patterns and technologies.; Ability to articulate design choices and justify trade-offs.; Consideration of non-functional requirements (performance, security, etc.).
**Evaluation criteria:** Scalability of the design; Availability and reliability considerations; Choice of appropriate technologies and databases; Understanding of trade-offs; Handling of edge cases and failure scenarios
**Common rejection reasons:** Inability to design scalable systems.; Poor understanding of trade-offs.; Lack of knowledge in distributed systems concepts.; Not considering edge cases or failure scenarios.
## Questions

- Design a news feed system similar to Facebook or Twitter.
- Design a URL shortening service like Bitly.
- Design a system to count the top K trending items in real-time.
- Design a distributed cache system.

## Preparation tips

- Study common system design patterns and architectures.
- Practice designing systems for scale, considering factors like traffic, data volume, and latency.
- Understand the pros and cons of different databases (SQL vs. NoSQL), caching mechanisms, and message queues.
- Be prepared to discuss trade-offs in your design decisions.
- Review resources like 'Grokking the System Design Interview'.

## Round 3: Behavioral and Cultural Fit
**Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Assess behavioral aspects, cultural fit, and alignment with company values through past experiences.
This round focuses on your behavioral aspects and cultural fit. You will be asked questions about your past experiences, how you handle challenges, work in a team, and your career aspirations. The goal is to understand your working style, your ability to collaborate, and how well you align with SmartNews's values and mission.
**Interviewers look for:** Strong communication and interpersonal skills.; Ability to articulate past experiences and learnings.; Evidence of teamwork, leadership, and initiative.; Cultural fit with SmartNews's values.; Motivation and passion for the role and company.
**Evaluation criteria:** Communication clarity and effectiveness; Problem-solving approach and critical thinking; Teamwork and collaboration skills; Adaptability and learning agility; Alignment with company culture and values
**Common rejection reasons:** Poor communication skills.; Lack of self-awareness.; Inability to provide specific examples.; Not aligning with company values.; Negative attitude or lack of enthusiasm.
## Questions

- Tell me about a time you disagreed with a team member. How did you handle it?
- Describe a project where you had to learn a new technology quickly.
- What motivates you in a work environment?
- How do you prioritize your work when you have multiple competing deadlines?

## Preparation tips

- Prepare examples using the STAR method for common behavioral questions.
- Reflect on your strengths, weaknesses, and career goals.
- Research SmartNews's company culture and values.
- Be ready to discuss your motivations for applying to SmartNews.
- Show enthusiasm and genuine interest in the role and company.