Muhammad Umar Email & Phone Number

Worked on a sports advertisement marketplace place using Stimulus and Ruby on Rails● Upgraded app from rails 4 to rails 6 and node 12 to 16.● Implemented an efficient cache access mechanism on top of rails to achieve 8 times higher throughput● Implemented a queue system that can handle up to 10m daily jobs using Redis and Sidekiq● Managed the code using the View-Model approach which drastically simplifies views part of the project● Designed environment pipeline on Heroku and AWS and Implementation of CircleCI for code testing.● Implemented rubocop and lefthook for writing clean and avoiding extra code.● Migrate from SQLite to Postgres without any data loss using the automated script.● Implemented unit testing using Selenium and factory bot and test coverage up to 90%.● Implemented task management module using rails hotwire turbo.● Implemented bulk Import and export of data of 30 tables and up to 10m records.

Leading the overall tech team of the Duke Leads I've experience managing multiple stacks at the same time.● Contributed code to open source Quran app used by 1 million daily visitors.● Purposed and implement user data sharing in cookies across multiple websites which optimize leadconversion up to 60%.● An implemented system that generates landing pages using view components and Turbo.● Implement DNS round-robin for handling 5m connection of traffic● Implement the pgbouncer and handle Postgres connection limited to database● Propose and write Ansible script to handle deployment across 10 servers at a time.

Worked on a lead distribution system that helps buyers and sellers to manage leads using React and Ruby on Rails● Implemented oauth2 and social signup using firebase.● Implemented SMS and Email third-party integration.● Created a Landing page that converts up to 40% using a multi-step form.● Managed different websites for lead generation and created many multistep forms with Zoho andLeadbyte CRM integration.● Created facebook custom audience and updated audience using API to decrease duplication of lead.● Implemented offline conversion of Google Ads.● Implemented postcode lookup API.● Converted landing page and step form to AMP with live Home Location Register and Email validation.● Worked on Hotjar, Google Tag Manager, Google Analytics, and Google Optimize to improve conversion.