Ayden Bissessar Email & Phone Number

London, Gb

London, England, Gb

San Francisco, Ca, Us

Leading engineers over two teams, ensuring Twitter’s Database and Hadoop platforms are highly performant, reliable and scalable. We support MySQL, CloudSQL (MySQL), Vertica, PostgreSQL, Druid, Hadoop and other in-house log ingestion services at Twitter; in the cloud and on-prem.

San Francisco, Ca, Us

Lead a newly formed global team of 10+ engineers, combining Database Operations with Site Reliability Engineering. Maintained thousands of servers through multiple environments; with automation, scale and performance being focal points.

San Francisco, Ca, Us

Leading a global team supporting 500+ servers. Clusters include MySQL, HBase with Apache Phoenix and MongoDB.• Lead team training on HBase/Apache Phoenix as transitioned from a MySQL only to a cross-functional team• Integral part of architecture team, splitting monolithic database into a database per service model• Automated MariaDB upgrade from 5.5 to 10.X on 300+ servers, performed in parallel batches• MongoDB upgrade from 2.4 to 3.X with no downtime• Introduced warm database deployments for MySQL, with no application downtime• Introduced best practices for HBase, including better region split policy, region normalisation, compression and more• Query tuning and optimising table design for Apache Phoenix for improved query performance• Implemented backup infrastructure for HBase, with alerting and automated restore methods• Wrote suite of data deletion scripts to ensure GDPR compliancy

San Francisco, California, Us

Senior DBA, leading the work on an automation platform to increase team efficiency. Supporting 600+ database servers, including Percona Server, Percona Cluster and MongoDB • Created automation platform with Ansible, deploying Percona Server/Cluster and MongoDB for initial builds and ongoing management• Migration of scripts to GIT, ensuring one code base was used throughout all environments• Implemented Icinga2 HA cluster for more robust and resilient monitoring• Implemented MaxScale as a proxy load balancing solution, achieving database HA as well as read/write query splitting for improved query throughput• Ensured all database related software (e.g. Monit, Icinga2, Maxscale) was also deployed by Ansible• Co-creator of a suite of customer data deletion scripts, written in Python to intelligently remove data from a multitude of systems• Migration from Percona server 5.5 to 5.6

San Francisco, Ca, Us

European DBA in a global team ensuring data scalability, performance and resiliency. Supporting MySQL as the main database platform. • Overhauled backup infrastructure taking it to a 100% success rate, with a web dashboard and Jira integration for monitoring• Developed Ansible roles for automation with MySQL and MongoDB (Database server builds, setting up replication and ongoing maintenance)• Standardised database server configuration in all environments• Migration from MySQL 5.0 to MariaDB 5.5• Developed analytical tools for pre-emptive monitoring (day on day growth alerts, graphing specific client growth)• Environment independent scripting with Ansible and GIT• Developed scripts for monitoring with Nagios

Irvine, Ca, Us

Supporting a growing MySQL Infrastructure, with sole influence on how the architecture grew for scalability and performance.• Wrote loading scripts to do full and incremntal loads from MySQL to Netezza up to every 15 minutes• Overhauled backup architecture• Transitioned to a cross-atlantic replication topology, ensuring performance didn't drop and reliability stayed the same• With no official european DBA presence prior to me, introduced standards and best practices to increase performance, availibity and reliability• Became the companies global DBA, solely administering 100+ database servers

London, England, Gb

Supporting a magnitude of Database servers, ranging from Oracle, SQL Server, MySQL and PostgreSQL for most of the BBC's interactive output (News, Sport, Weather, iPlayer).• Developed prototype tool to measure growth trends for MySQL, SQL Server and Oracle databases• Put in place high availability for SQL Server databases with database mirroring and aliases• Set up replication checksumming across the board with maatkit (now percona tools)• Major version migrations/upgrades for Oracle and MySQL

Allentown, Pennsylvania, Us

Helped manage hundred of SQL Servers in all environments, from development to production. General tasks were:• Building development SQL Server environments (including clusters)• Creating new document standards used in the organisation• Query optimisation • Training new colleagues on standard operational changes and tasks