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.

Responsibilities and Duties:

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

Skills:

Required:

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

Education:

Bachelor’s degree in Computer Science or a related field, or equivalent experience.

Experience:

10–15+ years of software engineering experience, including 3+ years in a senior, staff, or principal-level role.

O’Reilly Auto Parts has a proven track record of growth and stability. O’Reilly is full of successful career stories and believes in a strong promote-from-within philosophy, encouraging you to grow your career along with the organization. 

Total Compensation Package:

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

O’Reilly Auto Parts is an equal opportunity employer. The Company does not discriminate on the basis of race, religion, color, national origin or ancestry (including immigration status or citizenship), sex, sexual orientation, gender identity, pregnancy (including childbirth, lactation, and related medical conditions,) age (40 and over), veteran status, uniformed service member status, physical or mental disability, genetic information (including testing or characteristics) or another protected status as defined by local, state, or federal law, as applicable.

Qualified individuals with a disability may be entitled to reasonable accommodation under the Americans with Disabilities Act. If you require a reasonable accommodation during the application or employment process, please send an email to: rar@oreillyauto.com or call (800) 471-7431 option , and provide your requested accommodation, and position details.