Key responsibilities: ● Managing corporate data platform that is split into several data lakes with a total volume of more than 10PB ● Developing tools and frameworks for internal ETL Key achievements: ● Migrating towards service oriented infrastructure, ex: meta storage, tables schema service, alerting service ● Rewriting legacy systems in python 2 in golang Technologies: python, golang, kafka, hive, presto, puppet

Key responsibilities: ● Setting up and supporting in-house enterprise applications instances on AWS ● Terragrunt/terraform automation, optimization to reduce the costs, and simplifying deployment processes ● HR routines automation, linking APIs to support new hires provisioning process ● Infrastructure verification and provisioning tooling support and development Key achievements: ● Integrated Gsuite, Zendesk, Namely, Greenhouse APIs into a single pipeline ● Reverse engineered manual AWS setups into terraform code ● Reduced downtime by introducing the fail-over approach in handling applications upgrades Technologies: python, golang, postgres, terraform, terragrunt, ansible, aws, heroku

Key responsibilities: ● Core platform development, including parts of the main delivery components and command & control infrastructure ● Handling the release process ● Covering 3rd level support Key achievements: ● Refactored logs delivery pipeline to allow migration from legacy Hadoop-based backed to Spark-based system ● Implemented internal SSL certificates storage to mimic AWS Cert Manager feature ● Prototyped distributed logs processing on delivery servers Technologies:python, golang, c++, postgres, ansible, puppet, docker, hadoop, emr, nginx, aws

Key responsibilities: ● Integrating various data sources to build robust and most accurate scheduling database around the UK Key achievements: ● Implemented an algorithm to identify real-time train position based on limited and often falsy and uncertain information by leveraging various sources. ● Implemented API gateway to reduce the impact of third-party data providers downtime and failures Technologies: ruby, golang, aws, postgres, chef, soap

Key responsibilities: ● Designing and developing CDN core infrastructure ● Ongoing operational support, participating in releasing process Key achievements: ● Architected DNS load-balancing solution based on multi-factor decisions such as geographical location, traffic costs, and preserved capacity. ● Migrated 200+ nodes management from Puppet to Ansible. ● Prototyped http-based live streaming failover solution for Wowza based on timestamps synchronization without noticeable interruption to end-user ● Established docker based CI/CD process for distributing CDN components Technologies: python, java, wowza, lua, nginx, ansibe, puppet,aws, docker, kubernetes, jenkins, gitlab, terraform

Key responsibilities: ● Participating in outsourcing projects as a Team leader ● Working in teams that are focused on rapid prototyping and development Key achievements: ● Was a core member of the OpenX Ads server customization project for Nokia’s Ovi Store ● Prototyped a front-end javascript framework from scratch for CNN before angular and react appeared on the mainstream scene ● Won one of the projects in finance are from Thomson Reuters over EPAM by providing a competing solution in short terms Technologies: javascript, angular, sencha, python, java, scala, hadoop, android, aws

Key responsibilities: ● Development and support for EDI SAP plugins written in C ● Acting as a 3rd level support Key achievements: ● Implemented 3/4 of all new modules while being part of the team ● Prototyped a framework that significantly reduced the need of using C language and instead relied on DSL Technologies: c, c++, solaris, antlr, java, python, bash