Software Engineer, Backend (All Teams) - job 1 of 2

As a Software Engineer, Backend at DoorDash, your main responsibilities will encompass developing, releasing, and running large-scale web applications, defining backend architecture, and enhancing the performance, reliability, and security of our backend systems. You'll also be involved in transitioning to a microservices-based architecture while solving complex technical problems that will make a significant impact on our logistics operations.

To qualify for the Software Engineer, Backend position at DoorDash, candidates should have a B.S., M.S., or PhD in Computer Science or a related field along with a minimum of 2 years of industry experience working with backend tech stacks. Proficiency in analyzing system resources for efficiency and scalability, as well as experience with service-oriented architecture, REST APIs, and SQL/NoSQL databases, is essential.

Proficiency in modern web stacks and technologies is crucial for a Software Engineer, Backend at DoorDash. Familiarity with HTTP, REST, and experience with both SQL databases like PostgreSQL and NoSQL technologies such as Redis and Elasticsearch is important. Additionally, a solid understanding of architectural design principles and service-oriented architecture is highly beneficial.

At DoorDash, the work culture for Software Engineers, Backend is dynamic and collaborative. Employees are encouraged to share unique perspectives, solve new challenges, and take ownership of their careers. The company values diversity and inclusion, ensuring that each team member can contribute effectively in an environment that promotes respect and innovation.

DoorDash places significant emphasis on the professional growth of its Software Engineers, Backend by offering a comprehensive benefits package, including 401(k) plans, paid parental leave, and wellness programs. Opportunities for equity grants, along with a work environment that fosters continuous learning and development, ensure that employees can enhance their skills and advance their careers.

When answering this question, highlight your specific involvement in transitioning applications from monolithic architectures to microservices. Discuss challenges faced, tools used, and how microservices improved scalability and performance. Be prepared to share examples that demonstrate your understanding of how microservices operate within a larger system.

A great way to tackle this question is by explaining your methodology for performance analysis. Discuss tools you've used to benchmark applications and optimizations you've implemented, such as reducing latency or load time. Providing quantifiable results can greatly enhance the impact of your answer.

When asked about REST APIs, it's beneficial to detail your role in designing, developing, or consuming them. Discuss best practices you follow, such as versioning, authentication, and error handling. Sharing projects where you successfully integrated REST APIs will demonstrate your expertise.

Use the STAR method (Situation, Task, Action, Result) to structure your response. Clearly set up the context of the problem and your responsibilities, then detail the steps you took to resolve it. Conclude with the positive outcome, highlighting skills and technologies that were instrumental in your success.

In answering this question, talk about specific security practices you integrate into your development process. Examples could include using authentication tokens, data encryption, and following OWASP guidelines. Emphasizing a proactive approach to security will resonate well with interviewers.

This is a chance to express your preferences, so share a framework that aligns with the technologies used at DoorDash. Discuss its advantages, such as ease of integration, performance, or community support. Be sure to also mention any challenges you've faced while using it.

Explain your approach to project management and task prioritization. Discuss tools you use to track progress and manage deadlines, highlighting your ability to remain flexible and adapt when priorities shift. Mention any methodologies you've employed, like Agile or Scrum.

When answering, share a specific situation where cross-team collaboration was crucial for project success. Describe your role and contributions, as well as how collaboration led to innovative solutions. This shows your teamwork skills and ability to communicate effectively across disciplines.

This question allows you to demonstrate forward-thinking. Discuss trends such as serverless architectures, microservices, or AI in backend development. You can also share your thoughts on the impact of these trends on scalability, performance, and maintainability of applications in the future.

Here, it's essential to connect your values and career aspirations with DoorDash's mission and culture. Speak about the aspects of the role that excite you, such as the opportunity to tackle complex problems or the chance to impact customer experiences. Personalizing your answer will make it compelling.