# 3
**Role:** Software Engineer · **Level:** Software Engineer I
**Company:** [Uber](https://scaleengineer.com/companies/uber)
**Difficulty:** Medium
**Salary:** US$90000 - US$120000
**Experience:** 0 - 2
**Timeline:** ~7 days
This interview process is designed to assess candidates for a Software Engineer I role at Uber. It evaluates technical skills, problem-solving abilities, and cultural fit within the company.
Canonical: https://scaleengineer.com/interviews/uber/software-engineer-i-software-engineer
---
## Overall evaluation

- Technical Skills
- Communication
- Behavioral and Cultural Fit

## Questions asked

- Given an array of integers, find the contiguous subarray with the largest sum.
- Design a URL shortening service like bit.ly.
- Explain the difference between a process and a thread.
- Tell me about a time you faced a technical challenge and how you overcame it.
- How would you design a system to track the real-time location of Uber drivers?
- What is polymorphism?
- Describe a situation where you had to work with a difficult teammate.
- Implement a function to reverse a linked list.
- How do you ensure the scalability of a web application?
- What are your strengths and weaknesses?

## Preparation tips

### lists

- Review fundamental data structures and algorithms (arrays, linked lists, trees, graphs, hash maps, sorting, searching).
- Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium-difficulty problems.
- Understand time and space complexity (Big O notation).
- Study common system design concepts (scalability, availability, databases, caching, load balancing).
- Prepare behavioral questions using the STAR method (Situation, Task, Action, Result).
- Research Uber's products, services, and recent engineering challenges.
- Practice explaining your thought process clearly and concisely.
- Prepare questions to ask the interviewer about the role, team, and company culture.

### 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). Practice implementing these in your preferred language and analyze their time/space complexity. Solve 10-15 LeetCode Easy and Medium problems related to these topics.","shortDescription":"Weeks 1-2: Data Structures & Basic Algorithms. LeetCode Easy/Medium."}
- {"title":"Advanced Algorithms and Problem Solving","longDescription":"Weeks 3-4: Dive into more advanced data structures like trees (binary trees, BSTs, tries) and graphs. Learn graph traversal algorithms (BFS, DFS) and common graph problems. Practice problems involving dynamic programming and recursion. Solve 15-20 LeetCode Medium problems.","shortDescription":"Weeks 3-4: Advanced DS & Algorithms. LeetCode Medium."}
- {"title":"System Design Basics","longDescription":"Week 5: Begin studying system design principles. Understand concepts like API design, database choices (SQL vs. NoSQL), caching strategies, load balancing, and microservices. Read articles and watch videos on common system design interview patterns. Review 2-3 system design case studies.","shortDescription":"Week 5: System Design Fundamentals. Read articles/watch videos."}
- {"title":"Behavioral Preparation","longDescription":"Week 6: Focus on behavioral questions. Prepare stories using the STAR method for common questions about teamwork, challenges, failures, and successes. Research Uber's company values and prepare examples that demonstrate alignment. Practice mock interviews.","shortDescription":"Week 6: Behavioral Questions & Mock Interviews. STAR method."}
- {"title":"Final Review and Practice","longDescription":"Week 7: Final review of all topics. Practice mixed coding problems and system design scenarios. Refine your understanding of Uber's business and technology. Prepare thoughtful questions for the interviewers.","shortDescription":"Week 7: Final Review & Practice. Uber research."}

## Location differences

- {"location":"San Francisco","differences":{"tips":["Research Uber's recent engineering blog posts and tech talks.","Prepare to discuss your experience with distributed systems and large-scale data.","Be ready to explain how your skills align with Uber's mission and product."],"interviewFocus":["Understanding of Uber's specific technical challenges and solutions.","Ability to articulate contributions within the Uber ecosystem.","Familiarity with Uber's engineering culture and values."],"commonQuestions":["Tell me about a challenging project you worked on at Uber.","How would you handle a sudden increase in user traffic on a critical Uber service?","Describe a time you disagreed with a technical decision made by your team lead at Uber."]}}
- {"location":"New York","differences":{"tips":["Familiarize yourself with Uber's operations in the specific region.","Think about how you would contribute to local product improvements.","Be prepared to discuss your experience with cross-functional collaboration."],"interviewFocus":["Adaptability to different market conditions and user needs.","Understanding of local operational nuances.","Proactive approach to problem-solving in a dynamic environment."],"commonQuestions":["How would you optimize the performance of a ride-hailing algorithm for a specific city's traffic patterns?","Describe a time you had to adapt to a new technology stack at Uber.","What are your thoughts on the future of mobility and Uber's role in it?"]}}

## Round 1: Coding Challenge
**Type:** Technical Interview - Coding · **Difficulty:** Medium · **Duration:** 45 min
Solve 1-2 coding problems focusing on data structures and algorithms.
This round focuses on your core programming skills. You will be asked to solve one or two coding problems, typically involving data structures and algorithms. The interviewer will assess your ability to understand the problem, devise a solution, write clean code, and analyze its efficiency. Expect follow-up questions to explore edge cases and potential optimizations.
**Interviewers look for:** A clear and logical approach to problem-solving.; Proficiency in writing clean, efficient, and bug-free code.; Understanding of time and space complexity.; Ability to communicate thought process effectively.; Willingness to consider alternative solutions and optimizations.
**Evaluation criteria:** Correctness of the solution; Efficiency of the solution (time and space complexity); Code quality and readability; Problem-solving approach; Ability to handle follow-up questions and optimizations
**Common rejection reasons:** Inability to articulate solutions clearly.; Poor understanding of fundamental data structures and algorithms.; Code contains significant bugs or logical errors.; Failure to consider edge cases or constraints.
## Questions

- Given a binary tree, find its inorder traversal.
- Find the kth smallest element in a sorted matrix.

## Preparation tips

- Practice coding problems on platforms like LeetCode, focusing on medium difficulty.
- Ensure you can explain your thought process while coding.
- Be prepared to discuss the time and space complexity of your solutions.
- Write code that is well-structured and readable.

## Round 2: System Design
**Type:** Technical Interview - System Design · **Difficulty:** Medium · **Duration:** 60 min
Design a scalable system based on a given problem statement.
This round assesses your ability to design and architect software systems. You'll be given an open-ended problem (e.g., design a ride-sharing service, a notification system) and expected to propose a high-level design. This includes defining APIs, data models, and discussing architectural choices, scalability, and potential challenges.
**Interviewers look for:** A structured approach to system design.; Knowledge of common design patterns and architectural choices.; Ability to identify potential bottlenecks and failure points.; Clear communication of design rationale and trade-offs.; Consideration of non-functional requirements like scalability, availability, and latency.
**Evaluation criteria:** Ability to design scalable and reliable systems.; Understanding of trade-offs in design decisions.; Knowledge of various system components (databases, caches, load balancers, etc.).; Clarity and structure of the design.; Ability to handle ambiguity and refine requirements.
**Common rejection reasons:** Lack of understanding of system design principles.; Inability to break down a complex problem into manageable components.; Failure to consider scalability, reliability, and maintainability.; Poor communication of design choices and trade-offs.
## Questions

- Design a system to handle real-time ride requests for Uber.
- Design a distributed cache system.

## Preparation tips

- Study common system design concepts and patterns.
- Practice designing systems like Twitter feed, URL shortener, etc.
- Be prepared to discuss trade-offs between different design choices.
- Think about scalability, availability, and performance.

## Round 3: Behavioral and Managerial Fit
**Type:** Behavioral Interview · **Difficulty:** Medium · **Duration:** 45 min
Discuss past experiences and how they align with Uber's values.
This round focuses on your behavioral and cultural fit. The hiring manager will ask questions about your past experiences, focusing on how you've handled various situations (e.g., teamwork, challenges, failures, successes). They will assess your alignment with Uber's core values and your potential to thrive in the company culture.
**Interviewers look for:** Examples of past behavior that demonstrate key competencies.; Alignment with Uber's mission and values.; Ability to work effectively in a team.; Self-awareness and a growth mindset.; Enthusiasm for the role and the company.
**Evaluation criteria:** Cultural fit with Uber's values (e.g., Bias for Action, Go Get It, Build Sweetness).; Teamwork and collaboration skills.; Problem-solving approach in past experiences.; Motivation and career aspirations.; Communication and interpersonal skills.
**Common rejection reasons:** Lack of alignment with company values.; Poor communication or interpersonal skills.; Inability to provide specific examples for behavioral questions.; Negative attitude or lack of enthusiasm.; Unrealistic salary expectations.
## Questions

- Tell me about a time you had to take initiative to solve a problem.
- Describe a situation where you failed. What did you learn from it?
- How do you handle constructive criticism?

## Preparation tips

- Prepare examples using the STAR method for common behavioral questions.
- Research Uber's company values and culture.
- Be ready to discuss your career goals and why you're interested in Uber.
- Show enthusiasm and a positive attitude.