Position: Node.js developer
Category: Node.js
English level: upper
Years of experience: 11

AWS Infrastructure cost optimization (~$15K monthly to ~2K monthly) 
AWS Infrastructure performance optimization (1.5s to 0.2s per request)
Design, lead and implement uber-like system with more than 1K online drivers and realtime geolocation tracking
Optimize ai-based trading platform to react on market changes quicker then competitors (from ~700ms to <300ms)
TUI, Lviv, May 2021 - Present 
Responsibilities:
- Design architecture and infrastructure
- Infrastructure cost/performance/security optimisations(AWS)
- Address production issues of the system
Technologies:  NodeJs, GoLang, Python, VueJs(Quasar), Postgres, AWS Services, terraform, datadog, apigee

JetSoftPro, Lviv, Sep 2020 - May 2021 
Responsibilities:
- Leading Backend Team 
- Communication with Customer, Product management 
- Design architecture and infrastructure
Technologies:  Node.Js, MongoDB, Redis, newman, docker, swagger, cypress

Avocado Tech, Lviv, Feb 2017 - Aug 2020 
Responsibilities:
- Communication with Customer, Product management 
- Come up with the best suitable technology and architecture for the tasks
- Contribute ideas (technological and product) to enhance the overall app experience
- Address production issues of the system
Cloud Services: Azure, AWS, Heroku
Programming languages: C#, JavaScript, Python
Technologies: ASP.NET MVC, ASP.NET Web Api, Node.Js, AngularJs, MsSql, MySql, Firebase, Redis

Agoda, Thaniland, Oct 2015 - Oct 2016
Responsibilities:
 - Come up with the best suitable technology and architecture for the tasks
 - Work closely with all team members to understand full stack functionality and architecture
 - Communicate constantly with product owners to understand and measure business values of developed features
 - Contribute ideas (technological and product) to enhance the overall app experience
 - Address production issues of the system
Technologies: C#, Scripting (Python / Ruby / …),WCF / Web API, IIS,Cassandra / Hadoop, Memcached, SQL, Analytics, A/B testing, Git

GlobalLogic, Lviv, Oct 2014 - Sep 2015
Responsibilities: 
 - Development business and presentation layer, responsive web design, refactoring, fixing, unit tests
Technologies: .NET Framework 4.0 - 4.5.3, ASP.NET MVC 3.0 - 5.0, Web API, WCF, HTML, CSS, JavaScript, jQuery/jQueryMobile, Handlebars, jqPlot, NHibernate, Dapper, SQL Server 2012 – 2014, T-SQL, REST, MS Reporting Services 2008, MS Analysis Services (OLAP, MDX)

Perfectial, Lviv, Oct 2012 - Oct 2014 
Responsibilities: 
 - Designing and implementing software infrastructure 
 - Leading development team
Technologies: C#, Asp.Net MVC, MsSql, Azure

Market-Mats, Lviv, Dec 2008 - Oct 2012 
Responsibilities:
 - Generate a real-time 3D content for use in visual and urban simulations.
Technologies: C#, 3DMax, OpenFlight, OpenGL