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Principal Software Engineer

8117 - Dallas Technology Hub - 5830 Granite Parkway, Plano, Texas, 75024

CarMax, the way your career should be! 

About this job

At CarMax, we are industry disruptors. At the heart of our innovation is new digital products. Working on many different aspects of the customer experience, our Principal Engineers research and discover new opportunities and shape products to fulfill them. From inception to completion, you will develop tools and technology, learning quickly from our spirit of experimentation. You will have a direct impact on improving the performance of our business and ensuring customers can buy the vehicles they want in a way that is right for them!

About the position

We are seeking a full stack Principal Software Engineer who will be part of our Transact team focused on building iconic associate experience solutions to help CarMax customers complete their journey in store. Your cloud based technology experience coupled with expertise around API’s, services, Front End, will help craft innovative solutions to meet our business goals. From inception to completion, you will develop tools and technology, learning quickly from our spirit of experimentation. Overall, you will have a direct impact on improving the customer satisfaction by empowering our associates through unified workflows to progress the customers their transaction.

As part of the Technology organization, you will have the opportunity to build associate experiences platforms and create best in class developer experiences in bringing business and platform capabilities to market.

What you will do – Essential responsibilities

  • Maintain and grow a deep knowledge of the retail, specifically from the point of view of how technology is being applied to power the In Store Transact Associate experiences.
  • Partner with the team and work across the entire application stack, building both the frontend and backend.
  • Design and Develop API’s and services using a variety of technologies. Technologies include .NET (C#), cloud-based PaaS / IaaS/ CaaS, open source and third-party solutions tools.
  • Develop robust monitoring and alerting.
  • Implement continuous integration and DevOps practices, including automated testing.
  • Leverage a variety of technologies to provide solutions to business needs.
  • Maintain and grow a deep knowledge and functional expertise of the supported technology ecosystem and touchpoints and impacts of changing industry best for deployment.
  • Partner closely with Architects and Lead Engineers to drive the Transact ecosystem forward.
  • Create technical and support artifacts for applications and integrations.

Qualifications and requirements

To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skill, and/or ability required. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

  • 8+ years of Application Development
  • Bachelor’s degree in computer science, a related field, or equivalent alternative education, skills, and/or practical experience is required.
  • Hands on programming using C# .Net Core, and Azure or similar cloud technologies required.
  • REST API design experience required.
  • Experience with API design and development required.
  • Knowledge and passion towards the App tier/Service layer methodologies required.
  • Proficiency in front-end technologies such as React, Typescript, Angular, HTML/CSS.
  • Strong teamwork skills, ability to learn quickly, excellent written and spoken communication required.
  • Experience integrating cloud-based technologies and solutions required.
  • Experience with scripting Infrastructure as code in a CI/CD pipeline
  • Prior experience working with container technology such as Docker, version control systems (SVN, GitHub, etc.), build management and CI/CD and monitoring tools.
  • Knowledge of SQL Server and NoSQL database technologies required.
  • Knowledge of JSON and XML concepts, frameworks, and standards, required.
  • Experience working with Agile and DevOps methodologies, required.
  • Experience implementing end point security utilizing industry standards and best practices.

Preferred Qualifications

  • In-depth knowledge of relational databases, SQL and NoSQL knowledge and experience preferred.
  • Knowledge of API Gateway technologies, preferred.
  • Expertise with front-end client-side development, frameworks, and patterns such as Micro front ends with module federation is a plus.

Work Location and Arrangement: This role will be based out of the Richmond, VA CarMax Technology Innovation Center or the Dallas, TX Technology Hub and have a Hybrid work arrangement.

Work Authorization:  Applicants must be currently authorized to work in the United States on a full-time basis.

About CarMax

CarMax disrupted the auto industry by delivering the honest, transparent and high-integrity experience customers want and deserve. This innovative thinking around the way cars are bought and sold has helped us become the nation’s largest retailer of used cars, with over 200 locations nationwide.

Our amazing team of more than 25,000 associates work together to deliver iconic customer experiences. Along the way, we help every associate grow their career and achieve their best, at work and in their community.  We are recognized for our commitment to training and diversity and are one of the FORTUNE 100 Best Companies to Work For®.

Our Commitment to Diversity and Inclusion:

CarMax is committed to bringing together people from different backgrounds and perspectives, providing employees with a safe, welcoming, and inclusive work environment.

CarMax is an equal opportunity employer, and all qualified candidates will receive consideration for employment without regard to age, race, color, religion, sex, sexual orientation, gender identity, gender expression, genetic information, national origin, protected veteran status, disability status, and any other characteristics protected by law.

Upon an applicant's request, CarMax will consider reasonable accommodation to complete the CarMax Job Application.

Average salary estimate

$135000 / YEARLY (est.)
min
max
$120000K
$150000K

If an employer mentions a salary or salary range on their job, we display it as an "Employer Estimate". If a job has no salary data, Rise displays an estimate if available.

What You Should Know About Principal Software Engineer, Carmax

At CarMax, we're not just about selling cars; we're redefining the entire customer experience in the automotive industry! As a Principal Software Engineer based in our Dallas Technology Hub, you will play a crucial role in crafting innovative solutions that enhance the associate experience for our customers. Your expertise in full stack development will allow you to contribute to the Transact team, helping to build impactful tools and technologies. Your day-to-day tasks will include developing APIs, designing services, and leveraging cloud-based platforms to improve the customer journey from start to finish. We value a spirit of experimentation, so you'll be encouraged to think outside the box and collaborate closely with architects and lead engineers to push the boundaries of what's possible. With your experience in .NET, C#, and front-end technologies like React and Angular, you'll develop robust systems and practices that will revolutionize the way our associates assist customers. Join us at CarMax and take part in a culture that truly values innovation, teamwork, and personal growth. In this role, your work will directly impact customer satisfaction and help ensure that our associates are empowered to facilitate seamless transactions. Dive into a fulfilling career where you can make a significant difference while working within a diverse and inclusive environment!

Frequently Asked Questions (FAQs) for Principal Software Engineer Role at Carmax
What are the main responsibilities of the Principal Software Engineer at CarMax?

The Principal Software Engineer at CarMax is responsible for collaborating with the Transact team to build comprehensive associate experience solutions. This includes developing both frontend and backend applications, designing APIs, implementing continuous integration and DevOps practices, and ensuring robust monitoring and alerting systems. You will leverage various technologies to meet business needs, foster teamwork, and contribute to an agile environment.

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What qualifications are needed for the Principal Software Engineer position at CarMax?

To be successful in the Principal Software Engineer role at CarMax, candidates should have a Bachelor’s degree in computer science or a related field, along with over 8 years of application development experience. Proficiency in C# .NET Core, cloud technologies like Azure, and front-end technologies such as React or Angular is crucial. Experience in API design, continuous integration, and familiarity with Agile methodologies are also essential qualifications.

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How does the Principal Software Engineer at CarMax impact customer satisfaction?

The Principal Software Engineer plays a vital role in improving customer satisfaction by developing tools and technologies that streamline the associate experience during customer transactions. By creating efficient workflows and robust applications, you empower CarMax associates to assist customers effectively, ensuring that they have an easier and more enjoyable buying experience.

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What technologies will the Principal Software Engineer at CarMax work with?

As a Principal Software Engineer at CarMax, you will work with a variety of technologies including .NET (C#), Azure cloud services, REST APIs, and frontend frameworks like React or Angular. Additionally, you'll have the opportunity to work with container technologies like Docker, and employ monitoring tools and CI/CD practices to enhance application deployment and performance.

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What kind of work culture can a Principal Software Engineer expect at CarMax?

At CarMax, a Principal Software Engineer can expect a collaborative, innovative, and inclusive work culture. The company promotes continuous learning, experimentation, and teamwork, allowing employees to contribute their unique perspectives to enhance solutions. With a strong commitment to diversity and employee development, CarMax stands out as one of the FORTUNE 100 Best Companies to Work For®.

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Common Interview Questions for Principal Software Engineer
Can you explain your experience with full stack development as a Principal Software Engineer?

In responding to this question, highlight specific full stack projects you've worked on, emphasizing technologies used in both the front and backend. Showcase your understanding of how these technologies integrate to deliver robust applications, and mention any performance improvements resulting from your contributions.

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How do you approach API design and development in your projects?

Share your methodology for API design, focusing on user needs, scalability, and documentation. Discuss best practices you've implemented such as REST principles, versioning, and securing API endpoints, as well as any tools you've used to streamline the development process.

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Describe your experience with agile methodologies in software development.

Discuss specific agile practices you have implemented in past roles, such as Scrum or Kanban. Provide examples of how these methodologies improved team collaboration, delivery timelines, and project adaptability. You could also mention your role in facilitating agile meetings and events.

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What role does continuous integration play in your development process?

Explain the importance of continuous integration (CI) and how you implement it in your workflow. Discuss tools you use for CI/CD and how they help automate testing, decrease deployment time, and improve the stability of your applications. Share any successes or challenges faced while implementing CI.

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How do you ensure high code quality in your projects?

Talk about the practices you follow to maintain code quality, such as code reviews, pair programming, and using static code analysis tools. Emphasize the value you place on both writing maintainable code and adhering to industry standards. You may also discuss how you mentor team members regarding best practices.

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What strategies do you use to troubleshoot and resolve software issues?

Share your systematic approach to debugging and troubleshooting, which may include logging, isolating problems, and using debugging tools. Provide examples from previous experiences where you identified and resolved significant software issues, leading to successful outcomes.

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How do you stay updated with the latest technology trends relevant to your role?

Discuss the resources you utilize to remain abreast of technology developments such as blogs, forums, conferences, or online courses. Mention any specific communities or platforms where you engage with other professionals and highlight any recent learnings that you have applied in your work.

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Can you discuss a challenging project you've worked on and how you overcame obstacles?

Reflect on a specific project that was particularly challenging, detailing the obstacles you faced. Describe your problem-solving approach, team collaboration, and the ultimate results of the project. This answer will illustrate your resilience and ability to drive projects to completion despite challenges.

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What are your thoughts on cloud computing and its future in software development?

Express your views on the growing significance of cloud computing in the software industry. Highlight how cloud solutions facilitate scalability, reduce costs, and enable rapid innovation. You can also discuss future trends you foresee and how you plan to integrate these trends into your work.

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Why do you want to work for CarMax as a Principal Software Engineer?

Highlight your alignment with CarMax's values, particularly in terms of innovation, customer experience, and teamwork. Talk about how you admire the company's commitment to diversity and quality, and express your desire to contribute your skills to help improve the car-buying experience through technology.

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Full-time, hybrid
DATE POSTED
March 27, 2025

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