Khaled is a passionate software engineer who excels at solving complex challenges using advanced algorithms and software. Adept at learning and adapting to new technologies, he has extensive experience building back-end server applications with RoR and Node.js, and front-end web applications using React and Hotwire. With a BS degree in computer engineering, Khaled is a versatile developer and proven leader, and has successfully guided project teams in the development of client products.
Worked directly with the CTO as part of a small remote team to build a no-code development, orchestration, and execution environment for trustworthy generative AI projects using Ruby on Rails.
Implemented a module that offers support for taggable models. Complex logical queries are enabled through the use of AND, OR, and NOT operators, allowing users to filter taggable models more effectively and with greater precision.
Assisted in translating product requirements documents into actionable technical specifications, enabling the development team to implement features and meet project goals efficiently.
Implemented Hotwire (Turbo and Stimulus) alongside TailwindCSS to develop a responsive front end, ensuring an immersive, smooth user experience and enhanced performance across devices.
Colorado State Government - Colorado General Assembly - Legislative Branch
Ruby on Rails Developer
2022 - 2023 (1 year)
Remote
Collaborated with the project manager and product owner to create an intuitive Ruby on Rails app, enabling the public to effortlessly book tours to the Colorado General Assembly.
Empowered Colorado General Assembly admins to efficiently manage booking times and assign knowledgeable tour guides to visitors, streamlining the tour experience and ensuring seamless coordination.
Utilized Pundit to establish role-based access control for admins, enabling them to securely manage different aspects of the application.
Skillfully managed multi-environment deployments using Capistrano and AWS EC2, providing seamless updates and optimized performance for each environment, ensuring a reliable platform for all users.
Implemented a robust CI/CD pipeline using CircleCI, leveraging Git branches for environment-specific deployments. Utilized RuboCop to enforce best practices, ensuring high-quality and maintainable code.
Employed RSpec and Capybara to effectively implement test-driven development (TTD), ensuring high-quality, reliable code and fostering a proactive approach to identifying and resolving issues.
Employed Hotwire (Turbo and Stimulus) combined with TailwindCSS to create a visually appealing and responsive front end, efficiently delivering an engaging and seamless user experience.
Utilized Redis to effectively compute available reservation slots.
Collaborated with a UI designer to build a cloud-based music artist and venue-matching platform, connecting artists and bands with suitable venues and fostering a thriving local music scene. The project was an MVP for a new startup.
Designed and implemented a robust Ruby on Rails API with a PostgreSQL database.
Transformed Zeplin designs into a dynamic React front end and seamlessly integrated it with the back-end RESTful API.
Implemented a robust CI/CD pipeline using CircleCI, leveraging Git branches for environment-specific deployments. Utilized RuboCop to enforce best practices, ensuring high-quality and maintainable code.
Employed RSpec and Capybara to effectively implement test-driven development (TTD), ensuring high-quality and reliable code and fostering a proactive approach to identifying and resolving issues.
Utilized Elasticsearch to implement searching functionality for the available artists.
Developed reusable React components and integrated them with the Ruby on Rails back end.
Tracked and fixed bugs using Jira as a reporting tool.
Updated Ruby on Rails APIs skillfully, performing necessary database and data migrations and adapting to evolving business requirements.
Employed RSpec and Capybara to effectively implement test-driven development (TTD), ensuring high-quality and reliable code and fostering a proactive approach to identifying and resolving issues.
Built the customized front-end Angular components and deeply refactored the codebase.
Connected Bosta's back-end service to external third-party APIs, such as Pipedrive, for the sales team.
Created the CI/CD pipelines in CircleCI and incorporated continuous delivery practices in our team.
Led a team of eight software engineers to design and develop back-end services that support our complex logistics and operations, using Meteor, Node.js, Express, MongoDB, and Mongoose with TypeScript and unit testing, using Jest.
Oversaw the development of new refactored versions of our front-end React websites and the native Android mobile application.
Developed a portal for club members to access the club's different activities.
Enabled members to view and reserve club trips, sports training sessions, and other activities; they receive push notifications for the activities they've joined.
Implemented the ability for users to subscribe to different news feeds and receive live news for the club.
Built a club gallery and a YouTube live stream channel.
Created the back end in Ruby on Rails and used Firebase to send push notifications.
Analyzed the original work of the office, which included a lot of paperwork and spreadsheets.
Designed a system that substituted all the needed paperwork and significantly increased efficiency. Previously, a typical day's work would take more than 35 man-hours. Now, it takes about ten.
Implemented the system gradually and trained the staff to use it while making it backward-compatible by automatically generating all the previous spreadsheets.
Developed advanced Node.js features within a microservice architecture, effectively orchestrating numerous services across the entire system.
Crafted RabbitMQ-based RPC calls to facilitate seamless communication between diverse services and enhance system interoperability, reliability, and efficiency in a distributed computing environment.
Resolved critical production issues spanning multiple services by leveraging Amazon CloudFront.
Developed a system that queries and scrapes data from multiple shopping websites, processes them, then adds them to our back-end model to be viewed on our website.
Installed Rspec, a testing framework in Rails, to test the currently implemented system.
Implemented different Ruby on Rails features for the website.
A simulation to find the probability that two opposing knights would kill each other within a set number of alternating moves (starting with white to move).In the code, the black knight is initially in the top left corner, and the white knight is in the bottom right. To change the initial positions, change the initialization of these variables: int whiteKnightPosi = 7; int whiteKnightPosj = 7; int blackKnightPosi = 0; int blackKnightPosj = 0;and to change the number of moves, change this variable: int moves = 64;To try it out, compile and run it on any Java environment. The output is a double, from 0 to 1, describing the probability.
Designed a distributed file system that works using master-slave architecture. The system keeps multiple replicas of the files for increased reliability and handles concurrency and consistency.
A blockchain cryptocurrency using Node.js. The cryptocurrency was created as a side project. After running the nodes and doing any transaction, it is correctly signed and propagates to all the nodes in the network.
Education
Bachelor's Degree in Computer and Systems Engineering
