# Software Engineer
**Role:** Software Engineer · **Level:** E2
**Company:** [Avito](https://scaleengineer.com/companies/avito)
**Difficulty:** Medium to Hard
**Salary:** US$80000 - US$120000
**Experience:** 2 - 5
**Timeline:** ~14 days
The Avito Software Engineer E2 interview process is designed to assess a candidate's technical proficiency, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds, including HR screening, technical interviews focusing on data structures, algorithms, and system design, and a final managerial interview to evaluate overall suitability and career aspirations.
Canonical: https://scaleengineer.com/interviews/avito/e2-software-engineer
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## Overall evaluation

- Technical Proficiency
- Communication and Collaboration
- Cultural Fit

## Questions asked

- Write a function to reverse a linked list.
- Given an array of integers, find the contiguous subarray with the largest sum.
- Design a system to handle real-time notifications for a web application.
- Explain the concept of Big O notation and provide examples.
- How would you optimize a slow database query?
- Describe a situation where you disagreed with a team member and how you resolved it.
- What are the advantages of using a NoSQL database over a SQL database in certain scenarios?
- How do you approach testing your code?
- Tell me about a time you failed and what you learned from it.
- Design a rate limiter for an API.

## Preparation tips

### lists

- Review fundamental data structures and algorithms (arrays, linked lists, trees, graphs, sorting, searching).
- Practice coding problems on platforms like LeetCode, HackerRank, or Codewars, focusing on medium-difficulty problems.
- Study system design principles, common design patterns, and trade-offs for building scalable applications.
- Prepare to discuss your past projects in detail, highlighting your contributions and technical challenges.
- Understand Avito's products, services, and company culture.
- Practice behavioral questions using the STAR method (Situation, Task, Action, Result).
- Be ready to explain your thought process clearly and concisely during technical discussions.

### studyPlan

- {"title":"Data Structures and Algorithms Fundamentals","longDescription":"Weeks 1-2: Focus on core data structures (Arrays, Linked Lists, Stacks, Queues, Hash Tables) and basic algorithms (Sorting, Searching, Recursion). Practice implementing these and solving problems related to them. Aim for 5-7 problems per week.","shortDescription":"Weeks 1-2: Data Structures & Basic Algorithms. Practice 5-7 problems/week."}
- {"title":"Advanced Data Structures and Algorithms","longDescription":"Weeks 3-4: Dive into more advanced data structures like Trees (Binary Trees, BSTs, Tries) and Graphs. Study graph traversal algorithms (BFS, DFS) and common graph problems. Continue practicing coding problems, increasing complexity.","shortDescription":"Weeks 3-4: Trees & Graphs. Practice 5-7 problems/week."}
- {"title":"System Design Basics","longDescription":"Weeks 5-6: Begin system design preparation. Study concepts like scalability, availability, reliability, databases (SQL vs. NoSQL), caching, load balancing, and message queues. Review common system design interview questions and practice designing simple systems.","shortDescription":"Weeks 5-6: System Design Fundamentals. Study scalability, databases, caching."}
- {"title":"Behavioral Preparation and Company Research","longDescription":"Weeks 7-8: Focus on behavioral questions and refining your resume. Prepare stories using the STAR method for common behavioral prompts (teamwork, conflict resolution, leadership, failures). Research Avito's values and prepare questions to ask the interviewer.","shortDescription":"Weeks 7-8: Behavioral Questions & Company Research. Prepare STAR stories."}

## Location differences

- {"location":"Moscow","differences":{"tips":["Research the specific tech stack commonly used at Avito's office in your location.","Understand the local market trends and how they might influence Avito's engineering practices.","Network with Avito engineers in your region to gain insights into the interview process."],"interviewFocus":["System design and scalability are often emphasized more in interviews for roles based in major tech hubs.","Candidates in regions with a strong local tech community might be asked more about specific technologies prevalent in that area.","Behavioral questions might be tailored to reflect local work culture and team dynamics."],"commonQuestions":["How would you design a URL shortening service like bit.ly?","Explain the difference between SQL and NoSQL databases.","Describe a challenging technical problem you solved and how you approached it.","What are the trade-offs between microservices and a monolithic architecture?","How do you ensure code quality and maintainability?"]}}
- {"location":"Saint Petersburg","differences":{"tips":["Familiarize yourself with Avito's use of cloud infrastructure.","Prepare examples of your contributions to team projects and collaborative efforts.","Understand Avito's approach to agile development methodologies."],"interviewFocus":["Emphasis on distributed systems and cloud-native technologies.","Problem-solving skills related to large-scale data processing.","Collaboration and teamwork are often highlighted."],"commonQuestions":["Design an API for a social media feed.","How would you implement a caching mechanism for a web application?","Discuss your experience with cloud platforms like AWS or Azure.","What are your strategies for debugging complex issues?","Tell me about a time you had to mentor a junior engineer."]}}

## Round 1: HR Screening
**Type:** HR Screening · **Difficulty:** Easy · **Duration:** 30 min
An initial conversation with HR to assess basic fit, motivation, and logistics.
The initial HR screening is a brief conversation to assess your overall fit with Avito, understand your career aspirations, and confirm your interest in the Software Engineer role. They will also cover logistical aspects like salary expectations and availability. This round is crucial for making a good first impression.
**Interviewers look for:** Enthusiasm for the role and Avito; Clear communication; Basic understanding of software engineering principles; Professionalism
**Evaluation criteria:** Basic understanding of the role and company; Communication skills; Motivation and interest; Alignment with basic Avito values
**Common rejection reasons:** Poor communication skills; Lack of enthusiasm or interest; Unprofessional demeanor; Inability to articulate career goals
## Questions

- Tell me about yourself and your background.
- Why are you interested in Avito and this specific role?
- What are your salary expectations?
- What are your strengths and weaknesses?
- Where do you see yourself in 5 years?

## Preparation tips

- Research Avito's mission, values, and recent news.
- Prepare a concise summary of your experience and why you're interested in Avito.
- Think about your career goals and how this role aligns with them.
- Be ready to discuss your salary expectations.
- Prepare a few questions to ask the recruiter about the role or company culture.

## Round 2: Technical Interview - Coding
**Type:** Technical Interview (Coding) · **Difficulty:** Medium · **Duration:** 60 min
A coding challenge focusing on data structures and algorithms.
This technical interview focuses on your core programming skills. You'll be asked to solve coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to write clean, efficient code and explain your thought process clearly. Expect questions on arrays, strings, linked lists, trees, graphs, sorting, and searching.
**Interviewers look for:** Correct and efficient code; Understanding of algorithmic concepts; Ability to break down problems; Clear explanation of logic; Consideration of edge cases and constraints
**Evaluation criteria:** Proficiency in data structures and algorithms; Coding ability and clean code practices; Problem-solving skills; Ability to analyze time and space complexity; Clear communication of approach
**Common rejection reasons:** Inability to solve coding problems efficiently; Poor understanding of fundamental data structures and algorithms; Difficulty explaining thought process; Incorrect or inefficient solutions; Lack of attention to edge cases
## Questions

- Given a binary tree, find its inorder traversal.
- Implement a function to find the kth smallest element in an unsorted array.
- Write a function to check if a string is a palindrome, ignoring non-alphanumeric characters.
- Given two sorted arrays, merge them into a single sorted array.
- Find the first non-repeating character in a string.

## Preparation tips

- Practice coding problems on platforms like LeetCode, focusing on medium difficulty.
- Review common data structures and algorithms.
- Practice explaining your code and thought process out loud.
- Be prepared to discuss time and space complexity (Big O notation).
- Write clean, well-structured code.

## Round 3: Technical Interview - System Design
**Type:** Technical Interview (System Design) · **Difficulty:** Hard · **Duration:** 60 min
Assesses your ability to design scalable and robust software systems.
This round evaluates your ability to design and architect scalable and reliable software systems. You'll be presented with a high-level problem (e.g., design Twitter's feed, design a URL shortener) and expected to discuss various components, data models, APIs, and trade-offs. Focus on clarity, scalability, and robustness.
**Interviewers look for:** A structured approach to system design; Understanding of core components (databases, caching, load balancers, APIs); Ability to discuss trade-offs; Consideration of scale, performance, and reliability; Clear communication of design choices
**Evaluation criteria:** System design skills; Understanding of scalability, reliability, and availability; Ability to make informed trade-offs; Knowledge of distributed systems concepts; Problem decomposition and solution structuring
**Common rejection reasons:** Lack of understanding of system design principles; Inability to handle scale and performance considerations; Poor trade-off analysis; Difficulty in designing robust and scalable systems; Not considering failure scenarios
## Questions

- Design a system like TinyURL.
- How would you design a news feed for a social media platform?
- Design a distributed cache system.
- How would you design an API rate limiter?
- Design a system to store and retrieve user sessions.

## Preparation tips

- Study system design concepts: databases, caching, load balancing, message queues, APIs.
- Review common system design interview questions and case studies.
- Practice designing systems from scratch, considering different requirements.
- Be prepared to discuss trade-offs between different design choices.
- Think about scalability, availability, and fault tolerance.

## Round 4: Managerial Interview
**Type:** Managerial / Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Focuses on behavioral aspects, teamwork, and cultural fit with the hiring manager.
The final round is typically with the hiring manager. This interview focuses on your behavioral aspects, career goals, and overall fit within the team and Avito's culture. They will want to understand how you work, your motivations, and how you can contribute to the team's success. Be prepared to discuss your past experiences and how they relate to the role.
**Interviewers look for:** How you handle challenges and collaborate; Your approach to teamwork and conflict resolution; Your motivation and career growth aspirations; Cultural alignment with Avito; Potential for growth within the company
**Evaluation criteria:** Teamwork and collaboration skills; Problem-solving approach in a team context; Leadership potential; Adaptability and learning mindset; Alignment with Avito's culture and values
**Common rejection reasons:** Poor cultural fit; Lack of alignment with team goals; Negative attitude towards past experiences; Inability to demonstrate collaboration or leadership potential; Unrealistic career expectations
## Questions

- Tell me about a time you had a conflict with a colleague and how you resolved it.
- Describe a challenging project you worked on and your role in its success.
- How do you stay updated with new technologies?
- What motivates you in a work environment?
- How do you handle constructive criticism?

## Preparation tips

- Reflect on your past projects and team experiences.
- Prepare examples using the STAR method for behavioral questions.
- Think about your career goals and how this role fits into them.
- Research Avito's company culture and values.
- Prepare thoughtful questions to ask the hiring manager.