# Software Engineer **Role:** Software Engineer · **Level:** E7 **Company:** [Avito](https://scaleengineer.com/companies/avito) **Difficulty:** Hard **Salary:** US$120000 - US$150000 **Experience:** 7 - 10 **Timeline:** ~14 days Avito is looking for an experienced Software Engineer at the E7 level to join our dynamic team. This role involves designing, developing, and maintaining scalable and robust software solutions that drive our platform forward. We are seeking individuals with a strong technical background, excellent problem-solving skills, and a passion for innovation. Canonical: https://scaleengineer.com/interviews/avito/e7-software-engineer --- ## Overall evaluation - Technical Skills - Behavioral & Cultural Fit ## Questions asked - Describe a complex system you designed or significantly contributed to. What were the key challenges and how did you address them? - How would you design a URL shortening service like bit.ly? - Explain the difference between SQL and NoSQL databases and when you would use each. - Tell me about a time you had to deal with a production issue. What was your process for debugging and resolving it? - How do you approach code reviews? What do you look for? - What are your thoughts on containerization technologies like Docker and orchestration tools like Kubernetes? - Describe a situation where you had to influence a technical decision. What was your strategy? - How do you handle technical debt? - What are the trade-offs between monolithic and microservices architectures? - Tell me about a time you failed. What did you learn from it? ## Preparation tips ### lists - Review core computer science fundamentals: data structures, algorithms, operating systems, and databases. - Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium to hard difficulty. - Study system design principles for building scalable and reliable applications. - Prepare to discuss your past projects in detail, focusing on your contributions, challenges, and learnings. - Research Avito's products, services, and company culture. - Prepare questions to ask the interviewers about the role, team, and company. - Practice behavioral questions using the STAR method (Situation, Task, Action, Result). ### studyPlan - {"title":"Data Structures and Algorithms","longDescription":"Weeks 1-2: Focus on Data Structures and Algorithms. Cover arrays, linked lists, trees, graphs, hash tables, sorting, searching, dynamic programming, and greedy algorithms. Solve at least 20-30 problems per week.","shortDescription":"Weeks 1-2: Data Structures & Algorithms. Solve 40-60 problems."} - {"title":"System Design","longDescription":"Weeks 3-4: Dive into System Design. Study concepts like scalability, availability, reliability, load balancing, caching, database design (SQL/NoSQL), message queues, and microservices architecture. Review common system design interview questions and case studies.","shortDescription":"Weeks 3-4: System Design. Study core concepts and case studies."} - {"title":"Behavioral and Situational Preparation","longDescription":"Week 5: Prepare for Behavioral and Situational Questions. Reflect on your past experiences and prepare examples using the STAR method for questions related to teamwork, problem-solving, leadership, and handling conflict. Research Avito's values and culture.","shortDescription":"Week 5: Behavioral Questions & Company Research. Prepare STAR examples."} - {"title":"Mock Interviews and Final Preparation","longDescription":"Week 6: Mock Interviews and Review. Conduct mock interviews with peers or mentors to simulate the actual interview environment. Review weak areas identified during practice and mock interviews. Prepare thoughtful questions for the interviewers.","shortDescription":"Week 6: Mock Interviews & Final Review. Practice and prepare questions."} ## Location differences - {"location":"Moscow","differences":{"tips":["Be prepared to discuss your experience with large-scale systems and high-traffic environments.","Highlight instances where you've influenced technical direction or mentored teams.","Research Avito's tech stack and be ready to offer informed opinions and suggestions.","Practice explaining complex technical decisions and trade-offs clearly.","Showcase your ability to collaborate effectively with cross-functional teams."],"interviewFocus":["Deep understanding of distributed systems and cloud-native technologies (e.g., Kubernetes, Docker).","Experience with performance optimization and scalability challenges.","Leadership potential and ability to mentor junior engineers.","Strategic thinking regarding system architecture and technology choices.","Strong communication skills and ability to articulate complex technical concepts."],"commonQuestions":["How would you handle a sudden surge in traffic on a critical service?","Describe a time you had to mentor a junior engineer. What was your approach?","What are your thoughts on the current microservices architecture at Avito? What improvements would you suggest?","How do you ensure code quality and maintainability in a large codebase?","Tell me about a challenging technical problem you solved recently and how you approached it."]}} - {"location":"Saint Petersburg","differences":{"tips":["Brush up on your data structures and algorithms, especially those relevant to backend development.","Prepare examples of your API design and implementation experience.","Be ready to discuss your approach to database management and performance tuning.","Demonstrate your problem-solving process with concrete examples.","Emphasize your ability to learn quickly and adapt to new technologies."],"interviewFocus":["Proficiency in core programming languages and data structures.","Experience in designing and implementing RESTful APIs.","Understanding of database design and optimization (SQL and NoSQL).","Problem-solving skills and analytical thinking.","Ability to work independently and take ownership of tasks."],"commonQuestions":["How do you approach designing a new feature from scratch, considering scalability and reliability?","Describe a situation where you disagreed with a technical decision made by your team lead. How did you handle it?","What are the key considerations when migrating a monolithic application to microservices?","How do you stay updated with the latest trends in software engineering?","Tell me about a project where you had to work with legacy code. What challenges did you face and how did you overcome them?"]}} ## Round 1: HR Screening Call **Type:** HR Screening · **Difficulty:** Medium · **Duration:** 45 min Initial screening call with HR to assess basic qualifications and cultural fit. This initial screening call is conducted by our HR team to understand your background, motivation for applying, and basic fit with the role and company culture. They will discuss your resume, career aspirations, and answer any initial questions you might have about Avito or the position. **Interviewers look for:** Fundamental programming knowledge.; Ability to think logically.; Clear communication. **Evaluation criteria:** Understanding of core programming concepts.; Basic problem-solving abilities.; Communication skills. **Common rejection reasons:** Inability to articulate thought process clearly.; Lack of depth in understanding fundamental concepts.; Poor problem-solving approach.; Insufficient experience with relevant technologies. ## Questions - Tell me about yourself. - Why are you interested in Avito? - What are your strengths and weaknesses? - Why are you looking to leave your current role? - What are your salary expectations? ## Preparation tips - Be ready to talk about your resume and career goals. - Research Avito's mission, values, and recent news. - Prepare questions about the role and company culture. - Be enthusiastic and professional. ## Round 2: Coding Interview **Type:** Technical Interview - Coding · **Difficulty:** Hard · **Duration:** 60 min Solve coding problems focusing on data structures and algorithms. This round focuses on your core technical skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your problem-solving approach, coding style, efficiency, and ability to explain your solution. **Interviewers look for:** Strong understanding of fundamental algorithms and data structures.; Ability to translate a problem into working code.; Attention to detail and edge case handling.; Clear explanation of the solution and complexity analysis. **Evaluation criteria:** Proficiency in data structures and algorithms.; Coding skills (clean, efficient, correct code).; Problem-solving approach.; Ability to analyze time and space complexity.; Handling of edge cases. **Common rejection reasons:** Inability to solve coding problems efficiently.; Incorrect or suboptimal algorithmic approaches.; Poorly written or unreadable code.; Difficulty explaining the solution.; Not considering edge cases or constraints. ## Questions - Given an array of integers, find the contiguous subarray with the largest sum. - 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. - Design a data structure that supports insert, delete, search, and getRandom in O(1) average time. ## Preparation tips - Practice coding problems on platforms like LeetCode, HackerRank, focusing on medium to hard difficulty. - Be comfortable with common data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming). - Practice explaining your thought process out loud as you code. - Consider time and space complexity for your solutions. - Write clean, well-structured, and readable code. ## Round 3: System Design Interview **Type:** Technical Interview - System Design · **Difficulty:** Hard · **Duration:** 60 min Design a scalable system and discuss architectural choices. This round assesses your ability to design and architect complex software systems. You'll be presented with a high-level problem (e.g., design a social media feed, a URL shortener, a ride-sharing service) and expected to propose a scalable, reliable, and maintainable solution. This includes discussing database choices, APIs, caching strategies, load balancing, and potential bottlenecks. **Interviewers look for:** Ability to design complex systems from scratch.; Knowledge of architectural patterns and best practices.; Understanding of scalability, reliability, and maintainability.; Ability to justify design decisions and discuss trade-offs.; Consideration of various components like databases, caching, load balancers, etc. **Evaluation criteria:** System design capabilities.; Understanding of distributed systems.; Scalability and performance considerations.; Trade-off analysis.; Clarity of design and communication. **Common rejection reasons:** Inability to design scalable and robust systems.; Lack of consideration for trade-offs and constraints.; Poor understanding of distributed systems concepts.; Failure to address non-functional requirements like availability and latency.; Inability to communicate design choices effectively. ## Questions - Design a system like Twitter's news feed. - How would you design a rate limiter? - Design a distributed key-value store. - How would you design an API for a ride-sharing service? - Design a system to handle real-time analytics for a website. ## Preparation tips - Study common system design patterns and principles. - Review case studies of popular systems (e.g., Twitter feed, Netflix streaming, Google search). - Practice designing systems by breaking down the problem, identifying requirements (functional and non-functional), and proposing solutions for each component. - Be prepared to discuss trade-offs and justify your choices. - Understand concepts like CAP theorem, eventual consistency, and different database types. ## Round 4: Hiring Manager Interview **Type:** Behavioral and Managerial Interview · **Difficulty:** Medium · **Duration:** 45 min Discuss your experience, teamwork, and career goals with the hiring manager. This interview is with the hiring manager to assess your overall fit with the team and the company. They will delve deeper into your experience, leadership potential, and how you handle various work situations. This is also an opportunity for you to understand the team dynamics, projects, and career growth opportunities. **Interviewers look for:** How you work with others.; Your approach to conflict resolution.; Your ability to mentor or be mentored.; Your passion for technology and continuous learning.; Alignment with Avito's core values. **Evaluation criteria:** Teamwork and collaboration.; Problem-solving approach in a team context.; Leadership potential.; Adaptability and learning agility.; Cultural fit with Avito. **Common rejection reasons:** Lack of alignment with team values.; Poor communication or collaboration skills.; Negative attitude or lack of enthusiasm.; Inability to provide specific examples for behavioral questions.; Mismatch in career aspirations or expectations. ## Questions - Tell me about a time you had a conflict with a colleague. How did you resolve it? - Describe a situation where you had to lead a project or a team. What was your approach? - How do you handle constructive criticism? - What motivates you in a work environment? - Where do you see yourself in 5 years? ## Preparation tips - Prepare specific examples using the STAR method for behavioral questions. - Think about your career goals and how this role aligns with them. - Be ready to discuss your leadership style and experience. - Show enthusiasm for the role and the company. - Prepare thoughtful questions about the team, projects, and challenges. ## Round 5: Senior Leadership Interview **Type:** Executive/Senior Leadership Interview · **Difficulty:** Hard · **Duration:** 45 min Discuss strategic thinking and leadership with a senior engineering leader. This final round is typically with a senior leader (Director or VP) to assess your strategic thinking, leadership potential, and overall alignment with Avito's engineering vision. They will likely ask high-level questions about technology trends, your experience in influencing technical strategy, and your vision for the future. **Interviewers look for:** High-level technical judgment.; Ability to think about the long-term impact of technical decisions.; Experience in influencing technical direction.; Strong communication and presentation skills.; Alignment with Avito's engineering principles. **Evaluation criteria:** Strategic thinking and technical vision.; Leadership and influence.; Ability to drive technical initiatives.; Communication of complex ideas.; Overall fit with Avito's engineering culture. **Common rejection reasons:** Lack of alignment with senior leadership vision.; Inability to demonstrate strategic thinking.; Poor communication of high-level technical concepts.; Lack of confidence or conviction in technical opinions.; Not asking insightful questions. ## Questions - What are the biggest technical challenges facing Avito in the next 3-5 years? - How would you foster a culture of innovation within an engineering team? - Describe a time you had to make a significant technical decision with incomplete information. - What emerging technologies do you think will have the most impact on our industry? - How do you balance technical excellence with business needs? ## Preparation tips - Think about the long-term technical challenges and opportunities facing Avito. - Be prepared to discuss your experience in driving technical change or innovation. - Articulate your vision for software engineering best practices. - Showcase your ability to think strategically about technology. - Ask insightful questions about the company's technical roadmap and challenges.