Demystifying Engineering Levels at FAANG Companies

Tech giants like Facebook, Amazon, Apple, Netflix, and Google (FAANG) have become synonymous with innovation and cutting-edge technology. Within these companies, engineering roles are divided into different levels, each with its own set of responsibilities and expectations. In this article, we will provide a comprehensive overview of engineering levels at each FAANG company, dispel common misconceptions, and provide real-world examples of tasks, responsibilities, and user-facing products or services associated with these levels.


  1. L4 - Software Engineer Level 4:

    • Responsibilities: L4 engineers at Google are typically early in their careers. They work on specific projects and tasks under the guidance of more senior engineers. Responsibilities include coding, debugging, and testing.
    • Real-world example: An L4 engineer might work on optimizing a specific algorithm in Google Search to improve search result accuracy.
  2. L5 - Software Engineer Level 5:

    • Responsibilities: L5 engineers have more autonomy and are expected to handle complex projects. They may lead small teams and contribute to system design.
    • Real-world example: An L5 engineer might lead the development of a new feature in Google Maps, such as real-time traffic updates.


  1. E3 - Software Engineer Level 3:

    • Responsibilities: E3 engineers often start as new grads or with limited experience. They focus on individual projects, learning the ropes of Facebook's codebase and tools.
    • Real-world example: An E3 engineer could be responsible for improving the performance of the News Feed algorithm.
  2. E5 - Software Engineer Level 5:

    • Responsibilities: E5 engineers at Facebook are senior engineers who lead major projects, mentor junior engineers, and contribute to the company's technical strategy.
    • Real-world example: An E5 engineer might lead the development of Facebook's Messenger app, integrating new features like video calling and chatbots.


  1. SDE I - Software Development Engineer I:

    • Responsibilities: SDE Is are early-career engineers focused on coding, testing, and troubleshooting. They work on well-defined tasks within larger projects.
    • Real-world example: An SDE I could work on optimizing the checkout process for Amazon's online shopping platform.
  2. SDE III - Software Development Engineer III:

    • Responsibilities: SDE IIIs are experienced engineers who may lead projects, design systems, and influence technical decisions.
    • Real-world example: An SDE III might lead the development of Amazon Web Services (AWS) features, such as serverless computing.

Understanding engineering levels at FAANG companies is essential for career development and navigating the tech job market. While these descriptions provide a general framework, it's important to note that responsibilities can vary between teams and over time. Furthermore, career progression is influenced not only by your initial level but also by your skills, performance, and impact.

To thrive in the dynamic tech industry, engineers should seek opportunities to learn, grow, and contribute to their respective companies, regardless of their current level. Whether you're a new grad starting as an E3 at Facebook or an experienced engineer as an L6 at Amazon, your dedication and passion for technology can lead to a fulfilling and impactful career within the FAANG ecosystem.