Rex Walker Email & Phone Number

California, 94086, US

Los Angeles, CA, US

• Extra Card is a debit card that builds credit by connecting to your bank account and paying off the charges by directly transferring funds via ACH within a day or two after the purchase.At Extra I am responsible for.
• Evaluated and implemented Snowflake analytics platform to replace the existing Redshift and Postgres reporting and analytics platform that were failing to return results. This included security and compliance, a.
• Working with the operational data and systems I have been collaborating with engineers on efficient interaction with both MySQL and Postgres databases, query tuning, data migration and removing inappropriate use of a.
• Working alongside the DevOps team planning and testing data migration from Digital Ocean to AWS RDS Aurora.
• Coordinating with the back end architect to design the data models, business logic and end points for the following Micro-Services: Authentication, Identity, Authorization, Double Entry accounting and Ledger, and a PCI.
• Researched and evaluated all available distributed SQL platforms as the basis for the new Micro- Services based architecture.

• Bay1 was a fintech startup targeting payment card issuing. I joined the startup team to help create the base data models, pick appropriate data persistence technologies and ensure the data solutions were scalable by.
• Work with product and engineering teams to create foundational data models for the following micro-services:Authorization, Authentication, Global and Regional Multi-Tenant, Double Entry Accounting,Identity/Party, Card.
• Created deployment scripts for DDL automation against Spanner using Liquibase
• Defined all physical, structural DDL and query tuning for Spanner
• Facilitated initial discussions and requirements for reporting and analytics platform.

New York, NY, US

• Designing the next generation of clinical trials reporting data model and data platform
• Responsible for the technical output of over 60 data engineers, contractors and FTE
• Mentor and support 4 engineering teams on data design, ETL, BI reporting and data security
• Building Medidata’s next generation data warehouse using Oracle, Redshift, Snowflake, AWSinfrastructure services, Pentaho and Tableau
• Replaced genomics loading and reporting Python/Redshift process that was failing after twohours for large clinical studies to completing within 6 minutes on Snowflake Analytics platformusing an XS instance.
• Planning and prioritizing the replacement Redshift reporting platforms with Snowflake

Irvine, California, US

• Unified and cultivated a collaborative team to own all design and operational aspects of the auction.com and ten-x.com database platforms
• Introduced the concept and demonstrated the value of data architecture. Created or reviewed all new schema designs to replace the legacy real estate application that had 350+ columns in one table on MySQL, PHP
• Automated the deployment of database changes using Flyway reducing design to deployment times by 90% reducing errors by 90%
• Supported relational design and implementation of MySQL in a micro-services environment using Docker containers and Ansible. Captured metadata in the Astah data modeling tool
• Worked with engineering to research and decide on the most appropriate data store for non-relational micro-services - MongoDB.
• Researched selected and implemented open source ETL tool - Talend

Redwood City, California, US

• Accountable for all data designs, integration and data movement strategies for C-3 Energy data analytics platform. Data sources from electric meter, time series, SCADA events, utility billing, and maintenance logs
• Analyzed and created data models for the electrical smart grid industry for analytic purposes
• Implemented data models in C-3 Object Oriented Domain Specific Language (DSL)
• Database performance review and scaling strategies, Postgres RDS, Cassandra, Redshift
• Improved data integration processes with engineering, devops, platform and data warehouse teams

Oakland, CA, US

• Designed and implemented all database structures to support perkville.com loyalty platform for small businesses.
• Responsible for all administration of the MySQL databases and infrastructure.
• Delivered all MySql DBA and database related activities for perkville.com (schema design and implementation, release management, database administration and scalability, backup, recovery, replication, database as a.
• Database scaling strategies, data model review, data platform and migration recommendations
• MySql procedural language scripts for data cleanup, migration, synchronization and validation

Sunnyvale, CA, US

• Reviewed schema designs for all changes to the ad tech platform supporting Oracle releases
• Supervised a team of 12 database engineers to perform all database development to build and deploy the APT platform application. Core advertising platform for display ads on yahoo.com
• Lead manager / developer for driving metadata management program within the team and across Yahoo. Designed processes and standards for metadata capture using ER Studio.
• Database engineer in agile development environment

Sunnyvale, CA, US

• Designed and coordinated the build of a business event tracking system to monitor all site and back end service activity. It provided insight into user activity within a page that does not make a call to a back end.
• Created data schema for the LinkedIn profile redesign to support multiple languages while maintaining page load performance and scalability requirements
• Supported engineering teams with data schema designs and appropriate database access methods for new site features and improved page load performance
• Assisted engineering teams with scalability, data quality and metadata capture for site facing key-value data stores and Hadoop distributed computing platform

San Jose, CA, US

• Managed team of globally dispersed data architects, set quarterly and annual goals and deliverables, supported skills development and implemented work life balance program as part of an enterprise architecture team
• Clarified project delivery goals and provided conflict resolution support to keep IMD projects on schedule and reduce implementation time
• Developed full development lifecycle and fast-track processes for data structure approval and creation in the Teradata database to reduce project implementation time
• Assessed current CMM (Capability Maturity Model) of the IMD Data Architecture team, tools, processes and people to support improvement projects
• Hired and led consulting team to gather requirements, select and implement a proof of concept for a metadata repository to improve engineering, product management and analytic team productivity
• Analyzed requirements to improve ebay.com page instrumentation to measure their effectiveness and improve analytics team productivity

San Jose, CA, US

• Supported hundreds of ebay.com site projects on database design, site stability, scalability, availability, rollback strategies, security, replication, operational and archival policies to ensure site performance and.
• Created a training program for data architecture best practices and trained both data architects and application architect to ensure site stability and improve productivity
• Designed and implemented an ILM strategy to archive the billing and item description data to save over three terabytes of storage
• Analyzed data and data access patters to enable multiple active data centers
• Designed data structures for internally developed messaging system enabling asynchronous processing thereby improving site page load performance.
• Approved and presented projects to a JAD – Joint Architecture Design and ARB – Architectural Review boards

• Created logical and physical data models for personality profiling and scoring system
• Supported developer with physical implementation and data access patterns for SQL Server

Hong Kong, HK

CargoSmart Web Based Shipping PortalData Architect, Sr. Development DBA. Responsible for seven Oracle development and QA databases. Creating and maintaining schema objects for development and QA activities. Responsible for metadata repository management and content for 300+ tables. Responsible for creating or approving all data models. Design and program.

US

• Project: Tupperware Order EntryProject: Jungle.com Order EntryProject: Williams Sonoma Order Entry, CRMSenior team lead for both internal and external projects. Responsible for metadata repository management and.
• Installed and maintained Oracle 8 and 8i database instances for development and demonstration purposes
• Created and managed metadata repository and documented 200+ table application in Oracle*Designer
• Upgraded Retek CRM product to run on the web using Developer 6 and Oracle 8i
• Team lead for group of 12 programmers through a development project using a structured methodology
• Compiled and maintained multiple project work plans

El Segundo, California, US

• Catalog Call Center Order Management SystemOne of two primary team leads to oversee the complete project lifecycle from analysis through implementation beginning with business interviews through production release..
• Created 150+ entity model to represent the current business objects
• Created 200+ base function, functional hierarchy to reflect current business processes
• Implemented Oracle’s ERP package AR, Inventory, OE Release 10.7sc
• Created templates, code libraries and coding standards for Oracle’s Developer toolset