Mark Tyrrell Email and Phone Number

Supporting a diverse portfolio of customer-facing software engineering teams as we build new products. Definitely the best place to lead-by-example and establish reference patterns where they have the greatest impact.

Supporting Platform initiatives.

Helping Expedia Group leverage capabilities for traffic management and data processing at the edges of our compute infrastructure.- Leading-by-example with tactical prototyping to drive adoption of inner/open source software- Supporting technical strategy in the areas of distributed compute across hybrid, public and private cloud environments. - Focus on traffic management capabilities: Leverage of Content Distribution Networks, Software Load-Balancers, Control Plane implementations, Service Meshes, traffic classification ( bot detection, feedback loops, stream processing ).

Responsible for driving Cloud architecture strategy and engineering teams at HomeAway.

Responsible for HomeAway's application edge stack spanning private and public cloud data centers. In 2016 I created an internal application load-balancer and proxy which supported A/B routing and test bucketing, co-ordination of common application edge functionality for HomeAway applications. In 2017 we have built a team specializing in edge development and extended our portfolio to include https://www.fastly.com/ for programmatic access to their globally distributed Content Distribution Network (CDN) and leveraging an open-source Service Mesh solution with https://linkerd.io/

Evangelist for integrating Indeed's Proctor A/B testing framework across customer facing teams at HomeAway, and adding test metrics collection in the UI tier using Kafka and Hadoop infrastructure. Led initiatives to replace legacy monolithic applications with tiered architecture leveraging micro-services for view orchestration and encapsulation of business logic. UI applications support server-side Handlebars rendering and provide a migration path for developers to use Node.js as an application platform with full support for isomorphic component rendering.Currently working on introducing continuous deployment using Docker as a contract between developers and hosting teams.

Led design and development of new traveler checkout application stack: Operations APIs withJSON Contracts; Backbone single-page application layer with node.js developmentenvironment (bower and require.js for UI dependency management); A/B testing based onProctor framework.Developed public request broker application for handling asynchronous notifications from abroad range of third-party systems. System uses disk-based queues to handle high throughputand RabbitMQ for distribution to internal services.Bootstrapped vendor integrations with Adyen and Zuora.

Used Apache Solr in a microsharding solution (due to hardware constraints) which scaled tosupport > 300 Million documents Maintained several homegrown search solutions based onApache LucenePerformance optimization and scaling:Participation in core tech team for two Super Bowl advertising campaigns, benchmarkingsearch service to support spikes in public traffic and provisioning failover instances.Part of team troubleshooting customer dashboard performance and stability issuesDeveloped internal application registry and JMX proxy used on a daily basis across all Javadevelopment teams at HomeAway.

Developing Java-based web applications

Worked on launch of multinational FSBO listing application built using Java open-source stack including Spring Framework, Hibernate, Tapestry

Designed a Spring-based workflow application with custom Lucene / Hibernate integration, and generic document indexing usign Apache POI. Built a document processing system with Autonomy's IDOL product (following training with Autonomy) which process Millions of publications (in PDF format).Made extensive use of Spring, Hibernate and IBatis on various smaller scale Java web applications with leading-edge adoption JavaScript frameworks (JQuery, DOJO, JsonRPC) to build rich AJAX user interfaces.