Senior Principal Software Engineer

O'Reilly Auto Parts • Headquarters, KY

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About The Position

The Senior Principal Software Engineer is a top-level individual contributor and hands-on technical leader responsible for designing, building, and scaling complex enterprise applications within the Java ecosystem. This role operates with a high degree of independence, sets technical direction across multiple teams, and provides mentorship to senior engineers. The position supports high-scale platforms, including Marketing Technology (MarTech) and customer-facing digital systems.

Requirements

• Expert understanding of the Software Development Life Cycle and enterprise application development.
• Strong architectural and problem-solving skills with the ability to influence technical direction across teams.
• Advanced experience with Java (8+), Spring Boot, REST APIs, and microservices.
• Experience with frontend technologies such as Angular or React.
• Experience with SQL and NoSQL databases, distributed systems, and messaging platforms.
• Hands-on experience with containerization and orchestration using Docker and Kubernetes/OpenShift.
• Proficiency with CI/CD tools and version control systems.
• Deep knowledge of cloud platforms and cloud-native application design.
• Strong communication skills and the ability to mentor and guide senior engineers
• Bachelor’s degree in Computer Science or a related field, or equivalent experience.
• 10–15+ years of software engineering experience, including 3+ years in a senior, staff, or principal-level role.

Responsibilities

• Define and evolve system architecture for large-scale, distributed, and microservices-based applications, including MarTech platforms.
• Lead the design and development of complex applications using Java, Spring Boot, and modern frontend frameworks such as Angular or React.
• Support MarTech capabilities such as campaign execution, personalization, content delivery, analytics, and customer data integration.
• Document “as-is” and “to-be” architectures and processes to support modernization and platform scalability.
• Drive engineering best practices around performance, reliability, security, and maintainability.
• Conduct and lead code reviews; mentor senior and staff engineers.
• Collaborate with product, marketing, and business partners to define technical roadmaps and manage technical debt.
• Design and support CI/CD pipelines and cloud-native deployments across AWS, Azure, or GCP.
• Develop and guide monitoring, alerting, and troubleshooting strategies for complex, high-traffic systems.
• Lead technical estimation, work breakdown, and prioritization efforts to support reliable delivery.
• Evaluate emerging technologies and conduct proofs of concept to inform long-term platform strategy.
• Act as a subject matter expert in Java-based enterprise systems

Benefits

• Competitive Wages & Paid Time Off
• Stock Purchase Plan & 401k with Employer Contributions Starting Day One
• Medical, Dental, & Vision Insurance with Optional Flexible Spending Account (FSA)
• Team Member Health/Wellbeing Programs
• Tuition Educational Assistance Programs
• Opportunities for Career Growth

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Number of Employees: 5,001-10,000 employees