I am a System Administrator and a Full Stack Developer, passionate about Ruby on Rails, performance optimization and DevOps. I have a Bachelor’s degree in Computer Science and 15+ years of professional experience in the field.

IT Skills Summary

Infrastructure Management: Terraform, Ansible, Capistrano
Containers & Orchestration: Docker, Packer, Helm, Kubernetes
Clouds: AWS, Scaleway
CI/CD: GitHub Actions, CircleCI, Gitlab CI, Codeship
Monitoring: DataDog, Prometheus, Grafana
App & Web servers: Passenger, Puma, Unicorn, Nginx, Apache
Databases: MySQL, PostgreSQL, Redis, ElasticSearch, Kafka, Microsoft SQL Server, Sphinx
Programming Languages: Ruby, JavaScript, Go, C#, Python
Backend: Ruby on Rails. ActionCable, ActiveStorage, ActiveJob. GraphQL API, Rest API. Sidekiq, Devise, OAuth, RubySAML, Pundit, CanCanCan, Doorkeeper, Geocoder, Ransack, Paperclip, Carrierwave
Frontend: React.js. Redux, Router, Server Side Rendering. Bootstrap, Zurb Foundation, Semantic UI
Testing: TDD/BDD with RSpec/Capybara. Rspec-performance, Minitest

Work experience

Site Reliability Engineer (remote). Smile Inc,
Kitchener, Canada
01/2020 - present

Responsibilities:

• Develop new Terraform modules for the Smile.io AWS infrastructure
• Migrate existing Heroku applications to the new infrastructure
• Improve the reliability of the system
• Participate in a weekly on-call rotation

Accomplishments:

• Migrated a business intelligence microservice from Heroku to Kubernetes (EKS):
  • dockerized the application
  • wrote a Helm chart with database and data migration hooks
  • wrote several Terraform modules to generate and publish the helm chart, to manage the database permissions (PostgreSQL)
  • automated the deployment of the application to staging and production environments using CircleCI and Terraform
• Migrated DNS hosted zone from DNSimple to AWS Route53
• Created a GH Action CI/CD to test and publish internal gems to GitHub Packages

Full Stack Developer. Pyx4 Inc,
Montreal, Canada
04/2018 - 01/2020

• Built a team of qualified developers
• Significantly improved the development process by creating a CI/CD pipeline with building a docker image of the application, automated tests and deployment, also introducing code reviews and adding documentation guidelines
• Developed a GraphQL API for the Dashboard project, dockerized and installed the application on the isolated offline environment for the client
• Developed a connection module allowing to import and authenticate users from LDAP-compatible repositories, such as Active Directory
• Developed a generic form engine allowing clients to customize different forms in the application for their needs
• Addressed several security vulnerabilities that allowed the company to pass a security audit and sign an important contract
• Managed infrastructure for different environments: production cloud, production on-premise, staging, QA, test
• Participated in on-call schedule

Ruby on Rails Developer, Mentel Inc.
Montreal, Canada
07/2017 - 04/2018

• Created a universal module to parallelize fetching requests using Net::HTTP + Mutex
• Tested and adjusted financial calculations for SIP tables, Performance reports and FIA accounts
• Optimized and cached database queries, reducing load times of heavy-loaded pages from 28 s to 200-300 ms
• Updated and maintained RSpec test suite, introduced integration tests (capybara)
• Provided various system administration service to clients including NGINX/Puma configuration getting A+ on SSLabs test, Heroku application configuration, various AWS services provisioning: RDS, EC2, ELB, S3, Route53, Cloudfront
• Under tight deadlines, debugged and fixed a lot of complex issues
• Promoted BDD/TDD and code review, mentored colleagues

Full Stack Developer, Retrigo Inc.
Montreal, Canada
07/2017 - 04/2018

Independent Contractor (Remote)

• Developed a website Retrigo.com for a client. Some highlights:
  • Integrated Paypal AdaptivePayments API, including automated refunds processing and multiple currencies support
  • Completely changed the frontend to meet the new custom design requirements
  • Wrote 600+ unit and integration tests for the core part of the application 8 Provisioned a server for production: Debian 9, NGINX/Unicorn, Capistrano
• Provided code review and mentoring to client’s developers

Ruby on Rails Developer, Trendigo Inc.
Montreal, Canada
12/2016 - 07/2017

• Configured and managed production server: Debian, Nginx, Passenger, Redis
• Added OAuth authentication with Facebook and Google+
• Optimized load time of several pages: from 4 s down to 100-200 ms
• Integrated application with a credit card processing API
• Integrated application with a back office API
• Developed location-based promotion gallery using Google Maps JavaScript API
• Developed a cross-platform mobile application in Xamarin.Forms

System Administrator, Sportmaster Ltd.
Moscow, Russia
2006 - 2016

• Installed, configured, upgraded and troubleshot server, networking, PBX, POS and workstation hardware and software in 10+ retails shops as the only system administrator in the regional branch of the company
• Worked with the equipment of the following vendors: HP, Cisco, Huawei, Panasonic, Cipher, Epson
• Provided technical support to users (150+ workstations)
• Facilitated the launching of 10+ retails shops and warehouses, providing technical support on all stages from hardware installation to software customization and educating the staff members.
• Participated in weekly on-call rotation for almost 10 years

Education

Certificate Proficiency in Professional Bilingual Communication

McGill University
2019 - present

Ruby on Rails optimization

Online School for Developers Thinknetica.com
2020 - present

Professional Ruby on Rails Web Development

Online School for Developers Thinknetica.com
2015 - 2016

Cisco CCNP Route

2015

Cisco CCNA Exploration

Tomsk State University of Control Systems and Radioelectronics 2012

Bachelor’s degree in Computer Science

Kemerovo State Technical University,
2001 - 2006

Hobbies and interests

• Computer programming
• Psychology
• Getting things done
• Learning foreign languages

If you’re interested in bringing my skills to your project, please feel free to contact me. Email: alex@kudashkin.pro, skype: a.kudashkin, tel: (438)403-8624.