Saad Ur Rahman

I extended the ability to fully customize the Kubernetes execution environment for Apache Heron. I achieved this by expanding and redesigning elements of the existing Kubernetes scheduler to allow more of the analytics container's environments to be modified. This was a challenge because I had to exercise meticulous care to ensure configurations Heron requires to function would remain unmodified. I developed the entire test suite for the Kubernetes scheduler module.

FTeX provides the core banking needs of being able to deposit, exchange, purchase, sell, and check account balances, as well as review transactions over some time.

It leverages real-time currency quotes, and a Redis cache is deployed as a session store for exchange rate offers. Each rate offer is unique and only valid for the requestor for an allotted period.

PostgreSQL is essential for the service as all financial transactions require ACID semantics. For demonstration purposes, the database transactions have been created in both the 2nd tier (service) and the 3rd tier (database). The service executes multiple queries within a transaction blocked and controlled by the service while the database uses User Defined Procedures. This last method serves to improve performance.

Meticulous care has been exercised regarding floating point precision using particular data types. Fiat currency values are limited to an accuracy of two decimal places, while cryptocurrency values are limited to a precision of eight decimal places. All financial calculations leverage round half-to-even. A general journal is maintained, and every financial transaction is recorded.

This is a multiple-choice question API platform written in Go and backed by Apache Cassandra.

This project aims to demonstrate my skillset designing, architecting, developing, and delivering a service designed for containerization. There are mock and integration tests employed. Please see the coverage reports in the project repository.

An RPC library written in C++ that leverages BSD sockets. This was an exercise in systems and efficient protocol design. The complete design document is available for review and addresses all design aspects, from the protocol to data structures and architecture.

A project comprised of a central hub, acting as a broker for clients and servers willing to engage in a file exchange. This project utilizes the Java threading and TCP/IP sockets library while leveraging advanced TCP/IP protocol features.

Based on the classic game by Nintendo, Brick Breaker aims to showcase the use of MVC and the Java Swing framework to develop a 2D game. Elements of the game are drawn using primitive shapes and images for UI elements.

Painter is a vector drawing application written in Java that utilizes the Java Swing framework to draw the user interface and canvas. It uses the MVC design paradigm to split responsibilities between the various components of the application. The observer pattern is employed to redraw and update the canvas when needed, thereby delivering better performance.

Rad Photo is an Android application written in Java designed to scrape a remote server’s directories for images and then display them. It allows users to then assign the images a zero to five-star rating.

This project scrapes the Twitter live public data stream to power an analytics dashboard. It leverages Spark Streaming to collect data on user locations, mentions, and hashtags. It then calculates the top five items in each dimension and displays the trend change in percentages.

This application utilizes the Apache Spark distributed framework and is written in Scala. It was designed as a batch processing job to be executed shortly after the Apache Server daily access log files for the day are fully collected. Its purpose is to process the daily access logs from the SEC’s EDGAR system to develop insights on filing accesses.