John Deringer Email & Phone Number

San Luis Obispo, Ca, Us

Microservices with SpringBoot, AWS, K8s and Temporal

San Luis Obispo, California Area

Responsible for designing new features, incremental improvements, and evaluating maintenance issues. Collaborate closely with marketing, UI/UX and product development on solutions, designs and sizing.Transactional notification services (email, SMS, and mobile push). Event-driven systems designed to support several million messages per day, with delivery in seconds. System leveraged Kafka, Docker, and Kubernetes on Linux for high scalability. Developed as independent microservices using… Show more Responsible for designing new features, incremental improvements, and evaluating maintenance issues. Collaborate closely with marketing, UI/UX and product development on solutions, designs and sizing.Transactional notification services (email, SMS, and mobile push). Event-driven systems designed to support several million messages per day, with delivery in seconds. System leveraged Kafka, Docker, and Kubernetes on Linux for high scalability. Developed as independent microservices using Java and Spring.Business transaction tracking using Kafka, processing millions of messages per minute, for real-time metrics and anomaly detection. Producer and consumer microservices using Java and Spring.TrueIdentity.com / TransUnion.ca - Principal architect for two of TransUnion’s most trafficked websites. Java Web services supporting SOAP and REST interfaces, Oracle database, interfacing with numerous TransUnion and external services. Supported e-commerce, enrollments, identity verification, product fulfillment, and online delivery of credit products. Back-end microservices using Java and Spring.Customer Support - Principal architect of TransUnion's customer support tool. Replaced several disparate tools, interfacing with various TransUnion services to retrieve customer information. Limited access to customer data using Spring Security / LDAP / Active Directory authentication & authorization. Created audit trail of agent actions and customer data access.Mobile app - Supervised the design of TransUnion's mobile app. Implemented using React Native and interfaced with the TransUnion credit monitoring service's JSON interface.Designing the next generation cloud infrastructure, migrating to Amazon Web Services (AWS). Show less

San Luis Obispo, California Area

Lead Engineer - Technical lead of an agile team consisting of eight engineers, supporting TransUnion’s direct consumer Web applications.Managed the software release process, including design review, Docker image creation, CI/CD (Jenkins), functional, regression and unit testing, release instructions, merging, tagging, and production verification.Worked closely with development team, architecture, business, and Scrum master to create user stories, triage defects, assign tasks… Show more Lead Engineer - Technical lead of an agile team consisting of eight engineers, supporting TransUnion’s direct consumer Web applications.Managed the software release process, including design review, Docker image creation, CI/CD (Jenkins), functional, regression and unit testing, release instructions, merging, tagging, and production verification.Worked closely with development team, architecture, business, and Scrum master to create user stories, triage defects, assign tasks, and monitor applications.Developed microservices using Java, IntelliJ, JSON, Swagger / OpenAPI, Spring, JPA, JMS, Git, and Oracle.Mentored developers and conducted mid-year and year-end reviews.Continuous compliance training, including HIPAA, SOC, SOX, OWASP security, ISO 27001, CCPA, GDPR Show less

San Luis Obispo, California Area

Machine Learning - Lead engineer of a virtual soccer application. The application was an artificial intelligence, reinforcement learning project, with Java implementations of the SARSA and nearest neighbor algorithms. Each autonomous agent (player) learned to play soccer through a configurable reward system, where each decision is determined by previously stored states and actions.SOA Architect / Advocate - SOAP, REST, service composition, and orchestration. Functioned as architect and… Show more Machine Learning - Lead engineer of a virtual soccer application. The application was an artificial intelligence, reinforcement learning project, with Java implementations of the SARSA and nearest neighbor algorithms. Each autonomous agent (player) learned to play soccer through a configurable reward system, where each decision is determined by previously stored states and actions.SOA Architect / Advocate - SOAP, REST, service composition, and orchestration. Functioned as architect and lead engineer of several Java Web applications, using Tomcat, Spring, Maven, MySQL, SAML, JPA/Hibernate and Lucene / Solr, deployed to AWS (EC2 & S3). Show less

San Luis Obispo, California Area

Mortgage-backed-securities - Architect and Lead engineer of a Java web application developed for Lehman Brothers’ mortgage trading operations, enabling risk assessment, analysis, sampling, and securitization of hundreds of thousands of loans. Created sample loan populations and ran various risk assessments, including credit profiles, fraud scores, and high-risk areas. Facilitated categorizing loans, creating mortgage pools and securities tranches.

Architect of a Kiosk remote management system; An SOA Web application enabling the configuration and maintenance of any number of computer-based remote Kiosks via a Web based management console. The Kiosk Remote Management System was awarded Best-of-Show at the annual kiosk industry trade show, KioskCom2000.

Bachelor'S Degree, Finance And Economics

Specialized in predictive analytics and multi-regression analysis with IBM SPSS and data modeling tools

Political Science/Economics