Brian Leonard

Hands-on Lead for the team responsible for curating global performance data and providing Data Engineering as a Service to the company, enabling Delivery Hero's business teams to realise their data potential via Data Mesh. Core Data Mesh infrastructure hosted on Google Cloud Platform, Airflow orchestrated with Python-based tooling, data output to BigQuery, GCS-storage Lakehouse, streaming-data-sourced, Quality Monitored (Great Expectations), visualised via Looker, Tableau and Data Studio.

Leader for a Data Engineering team delivering a cloud-based, globally-scoped data platform that supports the BI and Data Science functions steering our international business decisions. Key contributing technologies include, amongst others, Amazon Redshift, S3, AWS RDS, Athena, Lakehouse and surrounding AWS Data services, BigQuery, Python, Postgres, Airflow, Jenkins, Terraform.

Leader for a team delivering the Data Warehousing solution required to support Business Intelligence, reporting and analytics needs for a large, international and growing online company. Key db technologies used include, among others, Amazon Redshift, Postgres, AWS RDS. Data sources and integrations include CRM, Appboy, Experian, Google Analytics, Adwords, Adjust, Facebook, SalesForce and backend databases covering over 40 countries.

Responsible for the integration of various data sources and 3rd-party systems at all layers of the Delivery Hero BI infrastructure, from ETL to DWH modelling and visualization. - Data sources included various globally-distributed backend databases (PostgreSQL, MySQL) as well as many other external repositories. - Source and Target systems included CRM systems, marketing tools, SalesForce, GoodData, Bime, Experian, Sailthru. - ETL process implementation included SQL, Talend, Java, JDBC.

Roles included Team Lead, Senior Software Engineer, and Scrummaster. Responsible for the design, implementation and maintenance of high-availability, globally distributed systems. Projects included global Reservations, Billing, BI, Reporting, Systems Integration, Real-time Conferencing (VoIP, SIP), Continuous Integration, virtualisation. Technologies included: C++, Java, .NET (C#), MS SQL, PostgreSQL, VMWare, Xen, JUnit, Maven, Ant, Hudson/Jenkins.

I was responsible for the design, implementation and maintenance of a number of software suites. Projects included - distributed client/server applications, real-time, high performance comms. - database systems implemented using MS SQL, PostgreSQL, MS Access, MySQL and Oracle. - reporting and billing and BI systems using MSSQL (DTS -> SSIS), MFC, Java, Crystal Reports, MS Excel, VBA