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Summary

Expertise

Project Highlights

Education

Agency

VM

English:

Advanced

Volodymyr M.

vetted by Youteam

Vetted by YouTeam

Poland

UTC +01:00

Europe/Warsaw

English:

Advanced

Senior Ruby on Rails Developer

Concerned about poor app performance impacting your bottom line? Research indicates that 53% of users will abandon an app if it takes more than three seconds to load? I am a Senior Ruby on Rails developer with a solid 8 years of experience in web application development, with a deep understanding of the Ruby on Rails framework, I am committed to delivering exceptional results and providing efficient solutions to your projects MY ACHIEVEMENTS: 1. Spearheaded the successful delivery and launch of 25 sophisticated Ruby on Rails web applications, ensuring seamless functionality and adherence to client specifications, resulting in high client satisfaction rates 2. Orchestrated performance optimization initiatives, implementing cutting-edge strategies that led to a remarkable 42% reduction in page load times, enhancing user experience and increasing user engagement 3. Guided a multidisciplinary development team in the seamless migration of a complex legacy system to Ruby on Rails, streamlining operations, improving system efficiency, and generating substantial cost savings in maintenance and support 4. Implemented rigorous security protocols and industry best practices, fortifying Ruby on Rails applications against potential cyber threats and reducing the risk of data breaches by a significant 50%, safeguarding sensitive user information 5. Demonstrated active involvement in the Ruby on Rails community by making impactful contributions to open-source projects. Garnered recognition for 3 notable code contributions, widely adopted by the community, and enhancing the overall functionality and reliability of the Ruby on Rails ecosystem «We are highly satisfied with Gotoinc Team’s work on our e-commerce platform. Their knowledge of Ruby on Rails and e-commerce best practices resulted in a robust, scalable, and user-friendly web application. The optimization techniques improved performance, leading to faster page load times and increased conversions. Their proactive communication and attention to detail made the project a success. We highly recommend the Gotoinc team for e-comm projects» Alex, Co-Founder Ruby: Ruby, Rails, Sinatra, Padrino, Grape, Sidekiq, Nginx, RSpec, Capybara, Rubocop, Capistrano, Unicorn, Puma, Elastic Search Databases: PostgreSQL, MySQL, SQLite3, Redis Web Servers: Apache, Nginx JavaScript JavaScript, ES 6/7, React, Vue, Jasmine, Handlebars, JSX, SKIM HTML/CSS HTML5, CSS3, SCSS, Bootstrap, HAML, SLIM VCS: Git (Github, Bitbucket) Highlighted Skills: Ruby on Rails Development, Full-stack Web Development, MVC Architecture and RESTful APIs, Front-end Technologies (HTML5, CSS3, JavaScript), Responsive and Mobile-first Design, Database Design and Implementation (PostgreSQL, MySQL), User Authentication and Authorization, Integration of Third-party APIs, Deployment to Cloud Platforms (Heroku, AWS), Test-driven Development (TDD), Agile Methodologies (Scrum, Kanban), Version Control Systems (Git, GitHub), Project Management and Collaboration Tools (Jira, Trello), Documentation and Code Commenting Last updated: November 25, 2024

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Expertise

Years of commercial development experience

8 years of experience

Core technologies

Ruby on Rails 8 years
Ruby 8 years
React.js 5 years
Vue.js 4 years
Full Stack Development 8 years
Back End 5 years

Other technologies

Apache
Heroku
HTML5
JavaScript
MySQL
Padrino
PostgreSQL
Sinatra
SOA
Bootstrap
Capistrano
CSS3
Elasticsearch
Git
HAML
Nginx
Redis
RSpec
Capybara
Jasmine
Sidekiq
Slim
Sqlite3
Grape
MVC
Handlebars.js
JSX

Project Highlights

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Ruby Team Lead

Bethel.tv

High-load online streaming platform with subscription and news.

Responsibilities & achievements

I have implemented the subscription system, refactored Braintree Subscription Admin Wrapper, added a discounts system, created landing pages auto generator, and worked with performance issues.

AWS
PostgreSQL
React.js
Ruby on Rails
Twilio
Elasticsearch
Redis
RSpec
Docker
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Ruby Team Lead

Shop

The biggest project that contains more than 30 repositories. It was B2B, Vladimir was

Responsibilities & achievements

I have implemented a new selling flow. I had to rearchitect DB, and rails applications, add wrappers and fix the performance issues.

Python
Ruby
Ruby on Rails
Sinatra
Elasticsearch
Grape
Vue.js
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Senior Ruby developer

Recruiting Platform

A recruiting CRM, allows you to easily manage the candidates through the pipeline. Users have a convenient dashboard that shows all the user's statistics - candidates, tasks, calendar, charts, etc., which users can customize to their liking, and a messenger to quickly communicate with all candidates and message campaigns to send multiple messages.

Responsibilities & achievements

My main responsibility was cleaning and optimizing DB, finding and Avoiding Memory bloating, and reducing response time for clients.

PostgreSQL
React.js
Ruby on Rails
Twilio
Elasticsearch
Redis
RSpec
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Senior Software Engineer

GeniusU

An e-learning platform that helps learners to find mentors. It's a web and mobile platform that connects over 1,000,000+ entrepreneurs to the right network, knowledge, and opportunities based on their personal values, vision, passions, talents, and purpose.

Responsibilities & achievements

I was responsible for local SMS provider integration and developing JSON API for SPA.

CoffeeScript
Heroku
jQuery
PostgreSQL
Ruby on Rails
Salesforce
Git
HAML
Redis
RSpec
Sidekiq
SCSS
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Middle Ruby Developer

Work search platform for veterans

The platform connects entrepreneurs from all over the world. Has a bunch of psychological tests and training courses. Helps to find events and training sessions for entrepreneurs around the world.

Responsibilities & achievements

I was working on improving team processes, code quality, project architecture; architecture design and business logic implementation; code review; features estimation.

PostgreSQL
React.js
Ruby on Rails
Sinatra
Elasticsearch
RSpec
Jasmine
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Ruby Team Lead

Event Side

I was a part of the startup working on the system for selling tickets for different events.

Responsibilities & achievements

The big problem was to move a big DB from MongoDB to PostgreSQL. I have implemented a payment system, a marketplace for event managers, a ticket generation system, and a users’ control system.

AngularJS
MongoDB
Node.js
PostgreSQL
Ruby on Rails
Elasticsearch
RSpec
icon
Middle Ruby Developer

Coupon Service

Application for people to buy and use discount coupons.

Responsibilities & achievements

I moved some parts of the functionality from two projects to one application. Clients had 2 services with the same functionality, so I had to combine them into one platform.

AngularJS
MongoDB
Node.js
PostgreSQL
Ruby on Rails
Elasticsearch
RSpec

Education

Higher education in Computer Science

Agency

Full-cycle web app developmet agency #386

10-50

GMT+2

Ukraine, Poland, Germany, Spain, Greece

Core Expertise

Agile
Heroku
PostgreSQL
React.js
Ruby
Ruby on Rails
Selenium
UI
UX
Automated Testing
Cucumber
Git
JMeter
Performance Testing
Scrum
Illustration
Manual testing
Waterfall
Vue.js
Cypress
Business Analysis
Figma

Industries

Education & Science, E-Commerce & Retail, Banking & Finance, Construction & Real estate, Advertising & Marketing, Travel & Tourism, Healthcare & Medicine, Accounting & Auditing

Want to hire this engineer?

Check if Volodymyr is available