Vadim KALINKIN

I started commercial software development in 2005, studying at the university for the last year. My first application written in C# was able to create and display TV transmitters' measurement reports. It is still used all over Russia with corresponding measurement equipment. Since then and until 2011 I was working as a net developer and eventually, I became a project lead. The result of my team's work was a software-defined DVB-T analyzer in production and a working prototype of a DVB-T2 analyzer. In 2011 I moved to another company, https://www.medialooks.com, thus changing my specialization to Ruby on Rails development. I worked out and refactored many of the features of our company's internal CRM system which we call RM. Among them are the company's financial statistics analysis and sales case management. After a while, we started a project called Runby. It's a messaging tool for teams that helps them become more productive by organizing information. The project's landing page could be seen here: https://runby.com. I had a lot of responsibilities in this project, from writing and optimizing code to making architectural decisions about front-end and back-end. We have been using this tool internally at our company for several years and it's still used internally now. I'm keen on new technologies and I'm an experienced full-stack developer.

• Ruby on Rails - 12 years of experience with Rails versions from 2 to 7
• React.js - 6 years of experience
• MySQL - queries, stored procedures, triggers
• PostgreSQL - queries, search
• HTML/CSS/SCSS/HAML - responsible layout, layout bug fixes
• Twitter Bootstrap - template customization
• JavaScript - developed rich text editor similar to Hackpad
• Node.js and socket.io - developed WebRTC signaling server and client
• Git - working by git-flow
• Sphinx search engine and Elastic search - full-text search
• Sidekiq, ActiveJob - for sending emails and sphinx search engine delta indexing
• Bugsnag - errors logging
• Devise, cancancan - managing users and rights
• RSpec, Factory girl/Factory bot, capybara, faker - writing automated tests
• Nginx - reverse proxying, load balancing, TCP stream routing
• Jenkins, Docker - setting up tasks, continuous deployment
• Linux servers - setting up servers with Centos 6, and Debian 8 with no preinstalled software
• Cloudflare - DNS and cache administration
• REST API - developed REST API for runby.com's mobile client
• Protobuf - data serialization for remote debugging
• Eventmachine - bare TCP servers
• RabbitMQ, .Net Core - messaging pipe and multithreaded API request manager microservice for one of my projects