Position: Full-stack Senior Ruby on Rails developer
Category: Ruby
English level: upper
Years of experience: 10

Most valuable achievements:
- architecture design and implementation of the high-volume data processing Rails app for a startup that processes the entire Twitter firehose to extract and rank the financial assets news from there; lots of APIs to integrate with, gigabytes of data to process and store etc.
- back-end design and implementation for the reporting functionality over heavy-populated databases for a world-known RTB solutions provider
- full architecture design and consulting for a taxi-driver startup
I have been working in the web development industry for more than 10 years in different roles: back-end developer, full-stack developer, team lead, architect.
My typical responsibilities were: business analysis, requirements analysis and processing, architecture and solution design, estimation, pre-sale, development (coding, peer review), team/project management (sprint planning, release planning, supervising other developers).

Software design:
- SOLID
- OO design patterns
- microservices
- DDD/CQRS (beginner level)

Backend:
- Ruby (4.5-5 years of experience)
- Ruby on Rails (4.5 year of experience: authentication, background jobs, REST APIs, image processing, PDF rendering, pub/sub via ActionCable)
- Testing in Ruby/Rails ecosystem (minitest, RSpec, Capybara)
- RDBMS (Postgres, MySQL)
- NoSQL storages (firebase, Redis)
- Monitoring at scale: ELK stack (ElasticSearch + Logstash + Kibana), TICK stack (Telegraph + InfluxDB + Chronograf + Kapacitor)
- Deployment: capistrano, mina, Docker
- CI/CD: CircleCI, SemaphoreCI, Jenkins
- Hosting providers: Heroku, DigitalOcean
- Clouds: AWS (EC2, S3, RDS, CloudSearch, OpsWorks, ElasticBeanstalk), Google Computing Engine, Azure
- Working with APIs: GNIP, Twitter Streaming, Apple Push Notifications, Google Cloud Messaging, Twilio SMS API, LinkedIn API
- Open-source contributions: my own Ruby gem https://github.com/vittorius/rspec_flat_error_formatter/, more than 900 downloads

Front-end
- jQuery, Bootstrap 3.0, CoffeeScript, HAML, KnockoutJS
- React (immutable.js, react-virtualized, react-dnd, recompose, recompact, react-router v3 and v4) - advanced level
- Redux (redux-thunk, redux-saga)
- Testing: Jest, Enzyme
- Build tools: webpack 4 + Babel

Former experience (2007-2011):
- C# 2.0-3.5
- ASP.NET 2.0, ASP.NET MVC
- MS SQL Server
- PHP 5.0 (CodeIgniter, Yii 2.0)
I'm willing to work on a single long-running project (ideally, in a product company), offering outstanding functionality to its customers from both product and engineering perspectives, backed with a team of self-motivated and truly talented engineers. High load, machine learning, big data - these are my interests. I seek for a Ruby/React full-stack position an opportunity to try something new on the same project of the following techs: TypeScript, Haskell, Elixir/Erlang.
Kharkiv or remote work would be the best option.
Full-time or part-time.
No legacy projects support, no plain CRUD, no CMS or Spree e-commerce, please.