# Software Engineer
**Role:** Software Engineer · **Level:** Software Engineer I
**Company:** [AppFolio](https://scaleengineer.com/companies/appfolio)
**Difficulty:** Medium
**Salary:** US$75000 - US$95000
**Experience:** 0 - 2
**Timeline:** ~7 days
The Software Engineer I interview process at AppFolio is designed to assess a candidate's foundational technical skills, problem-solving abilities, and cultural fit within the company. It typically involves multiple rounds, starting with an HR screening, followed by technical interviews focusing on data structures, algorithms, and coding proficiency, and concluding with a behavioral or managerial interview to evaluate teamwork and communication skills.
Canonical: https://scaleengineer.com/interviews/appfolio/software-engineer-i-software-engineer
---
## Overall evaluation

- Technical Aptitude
- Communication and Engagement
- Cultural Fit and Motivation

## Questions asked

- Can you explain the difference between a process and a thread?
- Describe a situation where you had to deal with a difficult stakeholder.
- Write a function to reverse a linked list.
- What are the principles of object-oriented programming?
- How would you design a URL shortener?
- Tell me about a time you failed and what you learned from it.
- What is recursion and when would you use it?
- Explain the concept of RESTful APIs.
- How do you stay updated with new technologies?
- Describe your ideal work environment.

## Preparation tips

### lists

- Review fundamental data structures (arrays, linked lists, trees, graphs, hash maps) and algorithms (sorting, searching, dynamic programming).
- Practice coding problems on platforms like LeetCode, HackerRank, or Coderbyte, focusing on medium-difficulty problems.
- Understand object-oriented programming (OOP) principles and design patterns.
- Brush up on your knowledge of the programming language you'll be using for the technical interviews.
- Prepare to discuss your past projects in detail, focusing on your contributions and the challenges you faced.
- Research AppFolio's products, mission, and values to understand how your skills and aspirations align.
- Prepare questions to ask the interviewers about the role, team, and company culture.

### studyPlan

- {"title":"Data Structures Fundamentals","longDescription":"Weeks 1-2: Focus on core data structures like arrays, linked lists, stacks, queues, and hash maps. Practice implementing them and solving problems related to their usage. Understand time and space complexity analysis (Big O notation).","shortDescription":"Weeks 1-2: Data Structures (Arrays, Linked Lists, Stacks, Queues, Hash Maps) & Big O."}
- {"title":"Advanced Data Structures","longDescription":"Weeks 3-4: Dive into more advanced data structures such as trees (binary trees, BSTs, AVL trees) and graphs. Learn common graph traversal algorithms (BFS, DFS) and tree traversal methods. Practice problems involving these structures.","shortDescription":"Weeks 3-4: Advanced Data Structures (Trees, Graphs) & Traversal Algorithms."}
- {"title":"Algorithms and Problem Solving","longDescription":"Weeks 5-6: Concentrate on algorithms, including sorting algorithms (quicksort, mergesort), searching algorithms (binary search), and introductory dynamic programming concepts. Practice solving algorithmic problems that require logical thinking and optimization.","shortDescription":"Weeks 5-6: Algorithms (Sorting, Searching, Dynamic Programming) & Problem Solving."}
- {"title":"Behavioral and Final Preparation","longDescription":"Week 7: Prepare for behavioral and system design questions. Review your resume and prepare to discuss past projects and experiences. Research AppFolio's values and prepare questions for the interviewers. Practice mock interviews.","shortDescription":"Week 7: Behavioral Prep, System Design Basics, Mock Interviews & Company Research."}

## Location differences

- {"location":"Remote","differences":{"tips":["Highlight projects where you demonstrated initiative and learning agility.","Be prepared to discuss your remote collaboration strategies.","Emphasize your ability to work independently and manage your time effectively."],"interviewFocus":["Adaptability to new technologies","Problem-solving approach in a fast-paced environment","Collaboration and communication within a remote or hybrid team"],"commonQuestions":["Tell me about a challenging project you worked on.","How do you approach debugging a complex issue?","Describe a time you had to learn a new technology quickly."]}}
- {"location":"On-site","differences":{"tips":["Showcase your understanding of agile principles and how you've applied them.","Provide specific examples of how you've contributed to team success.","Be ready to discuss your approach to code quality and collaboration."],"interviewFocus":["Understanding of software development lifecycle","Teamwork and interpersonal skills","Contribution to team processes and best practices"],"commonQuestions":["Describe your experience with agile methodologies.","How do you handle disagreements within a team?","What are your thoughts on code reviews?"]}}

## Round 1: HR/Recruiter Screen
**Type:** HR Screening · **Difficulty:** Easy · **Duration:** 15 min
Initial call with HR to assess basic fit and discuss logistics.
This initial screening call with a recruiter or HR representative is to assess your general qualifications, understand your career goals, and ensure there's a basic alignment with the Software Engineer I role at AppFolio. They will discuss your resume, your interest in the company, and provide an overview of the interview process and compensation expectations.
**Interviewers look for:** Clear communication; Basic understanding of the role; Genuine interest in AppFolio
**Evaluation criteria:** Basic understanding of the role; Communication clarity; Enthusiasm for the opportunity; Alignment with basic job requirements
**Common rejection reasons:** Poor communication skills; Lack of enthusiasm; Mismatched expectations regarding the role or company
## Questions

- Tell me about yourself and your background.
- Why are you interested in AppFolio?
- What are your salary expectations?
- What are you looking for in your next role?

## Preparation tips

- Be ready to talk about your resume and why you're interested in AppFolio.
- Have a clear understanding of your career aspirations.
- Prepare questions about the company culture, benefits, and the interview process.

## Round 2: Data Structures and Algorithms Interview
**Type:** Technical Interview (Coding) · **Difficulty:** Medium · **Duration:** 60 min
Solve coding problems focusing on data structures and algorithms.
This technical interview focuses on your ability to solve coding problems using data structures and algorithms. You will be asked to write code, typically in a shared editor, to solve one or two problems. The interviewer will assess your approach, efficiency, and the clarity of your code and explanations.
**Interviewers look for:** Logical thinking; Ability to translate requirements into code; Understanding of time and space complexity; Clear explanation of approach
**Evaluation criteria:** Problem-solving ability; Coding proficiency; Understanding of data structures and algorithms; Ability to write efficient and clean code; Communication of thought process
**Common rejection reasons:** Inability to solve coding problems efficiently; Poor understanding of data structures and algorithms; Code that is not clean, readable, or maintainable; Difficulty explaining thought process
## Questions

- Given an array of integers, return indices of the two numbers such that they add up to a specific target.
- Implement a function to check if a binary tree is a valid Binary Search Tree (BST).
- Write a function to find the kth smallest element in a sorted matrix.
- Reverse a singly linked list.

## Preparation tips

- Practice coding problems on platforms like LeetCode, focusing on arrays, strings, linked lists, trees, and hash maps.
- Be prepared to discuss the time and space complexity of your solutions.
- Practice explaining your thought process out loud as you code.
- Ensure your code is well-structured and readable.

## Round 3: Behavioral and Managerial Interview
**Type:** Behavioral/Managerial Interview · **Difficulty:** Medium · **Duration:** 45 min
Assess behavioral competencies, past experiences, and cultural fit.
This interview focuses on your behavioral and situational responses. The interviewer will ask questions about your past experiences to understand how you handle various work scenarios, such as teamwork, conflict resolution, challenges, and successes. They will also assess your overall fit with the team and AppFolio's culture.
**Interviewers look for:** STAR method (Situation, Task, Action, Result) for answering behavioral questions; Examples of collaboration and initiative; Self-awareness and learning from mistakes; Alignment with AppFolio's values
**Evaluation criteria:** Behavioral competencies (teamwork, problem-solving, communication); Past experiences and accomplishments; Cultural fit with AppFolio; Motivation and career goals
**Common rejection reasons:** Lack of clarity in explaining past experiences; Inability to provide specific examples for behavioral questions; Poor alignment with company values; Negative attitude or lack of enthusiasm
## Questions

- Tell me about a time you faced a significant technical challenge and how you overcame it.
- Describe a situation where you had to work with a difficult team member. How did you handle it?
- What are your strengths and weaknesses as a software engineer?
- Tell me about a project you are particularly proud of and your role in it.
- How do you handle constructive criticism?

## Preparation tips

- Prepare examples using the STAR method for common behavioral questions (e.g., teamwork, challenges, failures, successes).
- Reflect on your strengths and weaknesses.
- Think about why you want to work at AppFolio and what you can contribute.
- Be ready to discuss your career aspirations and how this role fits into them.