Principal Application Engineer

Discover. A brighter future.

With us, you'll do meaningful work from Day 1. Our culture is built on three core behaviors: We Play to Win, We Get Better Every Day, and We Succeed Together. We want you to grow and make a difference at one of the world's leading digital banking and payments companies. We value what makes you unique so that you have an opportunity to shine.

Come build your future, while helping millions find a brighter financial future with Discover.

Discover. A brighter future.

With us, you'll do meaningful work from Day 1. Our culture is built on three core behaviors: We Play to Win, We Get Better Every Day, and We Succeed Together. We want you to grow and make a difference at one of the world's leading digital banking and payments companies. We value what makes you unique so that you have an opportunity to shine.

Come build your future, while helping millions find a brighter financial future with Discover.

What You'll Do

The Principal Application Engineer leverages their extensive experience to deliver high-impact software solutions intuitively. They excel in troubleshooting and design, often working on complex components, and spend more time documenting than coding.

How You'll Do It

• Create technology solutions for high-impact business priorities, analyzing, designing, coding, testing, and deploying features with high quality.
• Be competent in multiple technical domains, including programming, security, automation, testing, and business areas, serving as a go-to person outside their immediate team.
• Participate in strategic technology decisions, understanding their impact on Discover.
• Identify and mitigate issues proactively, driving root cause analysis and problem solving.
• Coach technology communities in areas such as technology domains, design thinking, agile development, security, architecture, and data engineering.
• Design and optimize big data pipelines using Apache Spark for performance, scalability, and reliability.
• Architect event-driven systems utilizing AWS Lambda, SQS, and other messaging technologies.

Qualifications You'll Need

• Bachelor's degree in Computer Science, Engineering, Informatics, Information Security, or Information Technology.
• Experience in IT, Software Engineering, or related fields.
• For roles requiring Dreyfus Rating, internal applicants only: proficiency on the Dreyfus engineering scale.

Preferred Requirements

• Hands-on experience with AWS services like Lambda, SQS, CloudFormation/Terraform, and monitoring tools.
• Deep understanding of big data frameworks, especially Apache Spark.
• Experience designing scalable, fault-tolerant, cloud-native systems.
• Advanced skills in Java and Python.

Physical and Cognitive Requirements

• Primarily stationary work, indoors in an office setting.
• Ability to operate office equipment and communicate verbally and in writing.

External applicants will undergo a technical interview.

Note: Discover will not sponsor or transfer employment visas. Applicants must be authorized to work in the UK full-time.

Application Deadline: The closing date is August 18, 2025. Apply early as the posting may close sooner.

What are you waiting for? Apply today!

Our culture centers on customer focus, compliance, and risk management. Discover, a division of Capital One, is an equal opportunity employer, committed to diversity and inclusion. We provide reasonable accommodations for applicants with disabilities. Contact us at for assistance.

Remote positions are limited to locations within the country where the job is based. Applicants must be 18 or older at hire.