Heather Pfeiffer

Engineered an ACID-compliant PostgreSQL database with query optimization, reducing inventory update times by 35%. Created secure Spring Boot REST APIs with Spring Security and JWT authentication for product transactions. Leveraged Supabase bucket storage for product images and AWS S3 for backups. Implemented CI/CD pipelines with Jenkins and GitHub Actions, automating testing and deployments. Containerized services using Docker and orchestrated deployments with Kubernetes, ensuring fault tolerance and horizontal scaling. Applied AJAX & Fetch API for real-time UI updates in the admin dashboard.

Designed and implemented Spring Boot microservices with RESTful APIs and Spring Data JPA to enhance scalability and data consistency. Introduced TypeScript static typing and OOP best practices, reducing runtime errors by approximately 30%. Integrated Redux Toolkit for centralized state management, optimized React lifecycle with Hooks. Built test automation with Vitest achieving ~80% code coverage. Migrated backend data to MongoDB with indexing for faster queries. Delivered DevOps rollout on Heroku with minimized downtime. Implemented SLF4J/Logback logging for production observability.

Led the development of a Canvas LMS-based e-learning platform using HTML5, CSS3, JavaScript, and responsive design, boosting user engagement by 60%. Architected a service-oriented CRM with a Java Spring MVC backend and integrated REST APIs for scheduling and reporting. Refined database schemas with normalization, improving data retrieval efficiency. Applied Agile/Scrum with Kanban boards to streamline team workflows, reducing project turnaround time by 40%.