K M Rakibul Islam

K M Rakibul Islam

Mentor
5.0
(2536 reviews)
US$35.00
For every 15 mins
3623
Sessions/Jobs
featured mentor
Featured mentor of the week
ABOUT ME
★Top Ruby on Rails Mentor since January 2016 (107 months in a row!)★
★Top Ruby on Rails Mentor since January 2016 (107 months in a row!)★

Experienced (17+ years) developer and friendly Ruby on Rails and React/Next.js/Redux Developer/Mentor (with passion for helping others learn) | ★ 3,620+ 5 ★ sessions/jobs. 8+ years on top of the Codementor Ranking ★

https://www.codementor.io/ruby-on-rails-experts

I am a Senior Software Engineer from Toronto, currently working as a Ruby on Rails and React/Redux Developer at theScore Inc. I am passionate about helping and mentoring people, especially those who are new to web development and the programming world. I am specialized in explaining the core concepts of Ruby and Rails, Javascript, React, APIs and everything else along with the best practices. I focus on the learning experience of my students and make sure they get exactly what they want. I have excellent academic track records (Bachelor of Science in Computer Science and Masters in Computer Engineering from the University of Toronto) along with strong development and industry experience in Software Development and Web Development (17+ years coding experience in total).

I have helped more than 800 individuals here at CodeMentor (with 3,620+ 5 ★ sessions) with their projects implementation, bug fixes, architecture advices, performance improvements etc. I have worked with a bunch of CEOs and CTOs of YC start-ups and helped them with their projects. Made long term relationships with many of them which I help in a regular basis today.

I have helped a ton of bootcamp students here at CodeMentor and helped them build their web development career path and getting jobs after the completion of their bootcamp cohorts.

Here at CodeMentor, I have helped people from all levels: From someone who is brand new to programming to 30+ years of experienced Senior Software Engineers, Product Managers and everyone in between. It's been an amazing journey here at CodeMentor for the last 8+ years! :-)

I started programming and solving problems in 2006, at the age of 18. Since then, I wrote programs in a variety of programming languages such as C, C++, Java, PHP, Ruby, Python, Javascript, etc. These days, I use Ruby and Rails and React JS as my primary programming languages and frameworks.

I can help with debugging your issues as well as refactoring your code according to the best practices and conventions out there. Helping people is my passion and motto in life. If you think I can help you in any way, please get in touch!

Specialties:

  • Building scalable and performant backend APIs in Ruby on Rails (Active Model Serializer, GraphQL, Grape, Jbuilder, RABL, etc.) for android, iPhone or web applications. (For more than 12 million users).
  • Integration of backend APIs with Javascript frontend framework (ReactJS) using JSON Web Token (JWT).
  • Built highly scalable Push Notification System for theScore sports application (For ~10 million users).
  • Implemented instant player, team and news article search for the theScore and theScore eSports apps which have more than 6 million monthly active users using ElasticSearch and Rails.
  • Backend Ruby on Rails Development (With scaling, performance optimizations, database query optimizations, caching best practices, etc.).
  • Test Driven Development with clean code and best practices.
  • Web Scraping (Nokogiri, Mechanize) (Scrape data from anywhere on the internet!).
  • Reverse engineering complex APIs and web applications to write automated scripts to mimic and automate user behaviour and extract required data.
  • Explain concepts/solutions clearly and concisely according to the level of the client/student. (Helped over 700 people on CodeMentor with 3,620+ 5 ★ sessions)
  • Giving architecture advice for your application. Explain which tools/gems to use and why.
  • Setting up SSL certificates for Rails application (Nginx server) on AWS EC2 instance and securing your application.
  • Suggesting best practices and focusing on the best learning experience and long-term achievements.
  • Showing cool tips and tricks that I have learned over the past 18+ years (and still learning!) as a professional Ruby on Rails developer to be more productive and efficient at work.
  • Upgrading Ruby/Rails versions for your existing application.
  • Finding bottlenecks and Optimizing performance for your slow Rails applications.
  • I can help you to prepare for interviews for Ruby on Rails developer position, or any other Software Development position. I have successfully guided many developers who got their dream jobs after practicing coding interviews with me!
English
Eastern Time (US & Canada) (-05:00)
Joined November 2015
EXPERTISE
12 years experience | 808 endorsements
I have a huge amount of experience with Ruby and Ruby on Rails. I have built a bunch ton of complex Rails applications along the way and ...
I have a huge amount of experience with Ruby and Ruby on Rails. I have built a bunch ton of complex Rails applications along the way and contributed to a number of popular open source projects built with Ruby and Ruby on Rails. At my previous job (https://www.quandl.com/) and the current job (http://www.thescore.com), I was/am involved with full-time Ruby on Rails based development. I have helped more than 550 individuals here at CodeMentor (with 2315+ 5 STAR sessions) with their Ruby on Rails projects' implementation, bug fixes, architecture advices, performance improvements etc. I have worked with a bunch of CEOs and CTOs of YC start-ups and helped them with their projects. Made long term relationships with many of them which I help in a regular basis today. I am also a regular contributor at StackOverflow where I help people with their Ruby and Ruby on Rails related problems. I am passionate about programming, helping people and doing things right. I feel immense pleasure when I can help someone to code and solve their problems.
Dropzone RailsDropzone.jsAdministrate
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12 years experience | 531 endorsements
I have a huge amount of experience with Ruby and Ruby on Rails. I have built a bunch of complex Rails applications along the way and cont...
I have a huge amount of experience with Ruby and Ruby on Rails. I have built a bunch of complex Rails applications along the way and contributed to a number of popular open source projects built with Ruby and Ruby on Rails. At my previous job (https://www.quandl.com/) and the current job (http://www.thescore.com), I was/am involved with full-time Ruby on Rails based development. I am also a regular contributor at StackOverflow where I help people with their Ruby and Ruby on Rails related problems. I am passionate about programming, helping people and doing things right. I feel immense pleasure when I can help someone to code and solve their problems.
BashScriptsFactory girl
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5 years experience
I have completed multiple AI course during the computer science major and am using AI in my development work day to day. Right use AI can...
I have completed multiple AI course during the computer science major and am using AI in my development work day to day. Right use AI can make you a true 10X engineer at work. I can help you with that.
14 years experience | 88 endorsements
I have designed and developed a bunch of complex JSON APIs using Ruby on Rails along with Grape, RABL, Active Model Serializer etc. by fo...
I have designed and developed a bunch of complex JSON APIs using Ruby on Rails along with Grape, RABL, Active Model Serializer etc. by following the best practices. At my current work, I am a part of the API development team which is consumed by more than 12 million users per month.
CacheSerializationScaling
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8 years experience | 196 endorsements
I write a lot of React with Apollo and GraphQL backed by Rails server. I am well versed in both functional and class components and expla...
I write a lot of React with Apollo and GraphQL backed by Rails server. I am well versed in both functional and class components and explaining the concepts to beginners in a way that makes sense. I currently work on and maintain two production grade React applications that are used by tens of thousands of users.
14 years experience | 122 endorsements
I have been using JavaScript/Jquery/Ajax for over 14 years and have a good grasp of the language. These days, I write a lot of React with...
I have been using JavaScript/Jquery/Ajax for over 14 years and have a good grasp of the language. These days, I write a lot of React with Apollo and GraphQL.
Es6AJAXjQuery
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12 years experience | 142 endorsements
I have successfully deployed many Ruby on Rails applications to Heroku and used various useful Heroku add-ons. I have analyzed Heroku log...
I have successfully deployed many Ruby on Rails applications to Heroku and used various useful Heroku add-ons. I have analyzed Heroku logs, debugged server errors and memory issues on Heroku many times. I have also fixed assets loading issues on Heroku. I can help you with your Heroku related problems as I am an expert Heroku user.
Ruby on RailsHeroku addonsHerkou + rails 4
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Ruby on RailsHeroku addonsHerkou + rails 4Heroku
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REVIEWS FROM CLIENTS

5.0
(2536 reviews)
cecilia james
cecilia james
November 2024
always great
Pam
Pam
November 2024
My first session with Rakib was good. I showed him code from my last interview. We went over it and he gave me feedback on how to explain the code better. He is setting up a path to help me get better, fill in the gaps so I can be better prepared for interviews.
cecilia james
cecilia james
October 2024
great as always.
Robert Morales
Robert Morales
September 2024
K M Rakibul Islam has been beyond exceptional, showcasing remarkable expertise and a deep passion for teaching. His commitment to helping me grow as a developer is evident in every session, and his mentoring has been a game-changer for my coding journey.
Robert Morales
Robert Morales
September 2024
K M Rakibul Islam work has been truly phenomenal, demonstrating a high level of expertise and a deep understanding of both foundational and advanced coding concepts. His attention to detail and dedication to ensuring clean, efficient, and scalable code is impressive. -Rob
Robert Morales
Robert Morales
September 2024
K M Rakibul Islam expertise and knowledge are outstanding. He has a deep understanding of various subject matters and explains complex concepts in a clear and approachable manner. His guidance has been invaluable in helping me grow as a developer. I greatly appreciate his patience, insight, and commitment to my learning journey.
Lohit Talasila
Lohit Talasila
July 2024
Thanks a lot!! Very responsive and an amazing developer. Would love to work with you again! :)
Liz Bayardelle
Liz Bayardelle
July 2024
K is the person I go to when I am absolutely stuck on something and he has never failed to fix the problem...usually within one session.
cecilia james
cecilia james
June 2024
very helpful as always
Neil Harris
Neil Harris
May 2024
Excellent knowledge and quick to resolve the issue. Very nice person too.
EMPLOYMENTS
Senior Software Engineer
theScore Inc.
2014-10-01-Present
→ Member of the "Shared Services Team" that is responsible for building all the backend services for theScore mobile apps and the web app...
→ Member of the "Shared Services Team" that is responsible for building all the backend services for theScore mobile apps and the web app. → Building fast and light-weight JSON APIs, Queueing systems, Push Alert systems, Search functionalities, internal content management systems, user subscriptions management systems and other back-end services that power the awesome theScore apps used by more than 12 millions sports fans around the world. → Developed a prototype of the theScore Kik chatbot. → Practicing test-driven development with RSpec, Factory Girl, Capybara. → Participating in an agile and collaborating environment. → Performing and receiving code reviews on a daily basis to ensure code quality. → Tools & Technologies Used: Ruby, Ruby on Rails, RSpec, JavaScript, Jquery, Ajax, Angular.js, React.js, ElasticSearch, Beanstalkd, Sidekiq, Redis, Memcached, MySQL, PostgreSQL, Python, Ansible, AWS, JIRA, CircleCI, Urban Airship Push Notification etc.
Ruby
Ruby on Rails
Angular
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Ruby
Ruby on Rails
Angular
API
PostgreSQL
Elasticsearch
React
JavaScript
GraphQL
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Software Engineer
Quandl Inc.
2012-01-01-2014-10-01
https://www.quandl.com
https://www.quandl.com
Ruby
Ruby on Rails
jQuery
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Ruby
Ruby on Rails
jQuery
PostgreSQL
Elasticsearch
React
Ember.js
JavaScript
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PROJECTS
theScoreView Project
2016
Ruby
Ruby on Rails
MySQL
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Ruby
Ruby on Rails
MySQL
Angular
PostgreSQL
RSpec
Elasticsearch
React
GraphQL
View more