Arvydas Jonusonis Email & Phone Number

Santa Clara, California, Us

Santa Clara, California, Us

- Consult with customer application teams on data model design and database integration- Assist customer with capacity planning and performance testing- Advocate for customer feature/hotfix requests- Collaborate with internal account teams to maintain alignment on account initiatives- Educate customer on product features and best practices- Operational planning (planning, validation, execution of upgrades, feature rollouts, maintenance activities)- Perform Root Cause Analyses- Develop tools and scripts for customers to address gaps in product features

- Implemented collection of and configured Grafana dashboards for Cassandra metrics- Migrated Cassandra configuration from Chef to Ansible

New York, Ny, Us

- led effort to segregate unsimilar workloads into separate clusters to improve reliability and reduce infrastructure costs- led migration of analytics Cassandra data from AWS to physical DC- helped automate Cassandra cluster (using Chef)- helped integrate Datadog as de facto Cassandra monitoring solution- developed maintenance tools (Spark jobs) for migrating and purging stale data- adhoc data analysis of Cassandra data (using Spark)- contributed to refactor of the lamdba stack into a micro-batch-based kappa flow powered by BigQuery- led migration of datamarts to Redshift- led evaluation and integration of Airbnb's Airflow into the stack

- Implemented turn-key metrics solution for micro-services- Implemented Cassandra client wrapper (for Java Native Driver) to support file-based configuration.- Designed Cassandra data model for tracking of user contacts (to notify them when people they know join the platform)- Led a Cassandra optimization/enhancement project, which involved refactoring existing code, automating repairs, changing compaction strategies, migrating data to a new cluster, upgrade- Contributed to big data team’s implementation of lambda architecture by refactoring event stream ingestion API to integrate with kafka

Woodland Hills, Ca, Us

Lead a development team within the Ops dept on Engineering-focused initiatives: problems (ITIL), security vulnerability fixes, re-design/consolidation of legacy products and infrastructure components, development to support upgrades and data migrations. Modernize and maintain Cassandra deployments and advise developers on data modeling. - Replaced all ActiveMQ deployments with Puppetized, upgraded instances in company's private cloud (OpenStack platform)- Development to support critical Jira upgrade- Developed and maintained an extensible healthcheck library (Java & Grails plugin) for use in all ReachLocal web/micro-services.- Executed upgrade of Cassandra (DSE) cluster (2.2.1 > 3.0.9)

Woodland Hills, Ca, Us

Worked closely with the architect to ensure that services are in line with the architectural vision.Support client teams (internal and external) in their integration with the Event System.Worked with devops to maintain and troubleshoot Cassandra infrastructure (4 clusters deployed across multiple datacenters).Re-designed event ingestion and distribution system (central comp;onent of the event-driven architecture) to use CQL3 (Cassandra) data model for persistence and Spring Integration components for more modular SEDA design.Led the following projects:- Development of a unified, global call tracking system (CTS), integrated with Twilio telephony platform- POC of Solr as an indexing mechanism for Cassandra data- Major refactoring of secondary indexes and other Cassandra data to make more scaleable and enable a crucial upgrade- Cassandra upgrade (0.6x to 0.8)- company wide, global notification system (e-mail and push notifications)

Woodland Hills, Ca, Us

Co-designed and developed (integrating within the Spring framework) the back-end services driving the sales force system.Designed and led development of a distributed enterprise event-driven system (leveraging Cassandra and ActiveMQ).

Us

Achievements:* Automated entire acquiring chargeback process.* Coordinated and carried out implementation of the ATM Protection Program (an urgently commissioned, risk reduction measure).* Integrated numerous Credit Card/ACH remittance processors (concept > design > implementation > operation > monitoring)Responsibilities:* Mentor/supervise two developers and train new department personnel.* Liaise with other department managers to address daily operational concerns.* Respond to urgent technical issues and system emergencies as part of a periodic 24/7 on-call rotation.* Provide technical support to integrating business clients.* Manage the department help desk workload.

Us

- Assisted systems engineer in design, development and testing of PCR-100, prototype semi-conductor wafer metrology tool- Prepared and maintained documentation for the PCR-100 during the development phase- Documented the system software- Developed support applications for the metrology tool system (Borland C++ Builder)

Engineering, Computer

Bdd/Rails

Agile/Scrum

Cassandra

Spring Core (2.5)

Intro To Functional Programming With Scala (Prof. Odersky)

Intro To Docker

Data Modeling For Cassandra 2.1