Teaching Assistant for the "Introduction to Software Engineering" course.

* Designed a normalized and scalable database layout for the primary cryptocurrency exchange service.* Engineered major parts of the exchange service using Kotlin as one of the two founding members.* Implemented an online point-of-sale system as a value-added service to the main exchange service.

* Designed a database backup infrastructure for PostgreSQL, providing streaming hot-standby replicas available to switch instantly, and Point-in-Time-Recovery replicas able to revert the data to any point within the previous 7 days.* Developed an open-source tool, pgkit, able to set up PostgreSQL database replicas in a matter of minutes.* Set up two self-managed Kubernetes clusters with more than 60 nodes hosting the company’s services.* Upgraded all instances of PostgreSQL to the latest version with zero downtime and in a fully revertable manner, leading to 15-30% reduction in database disk usage and ensuring the availability of future security updates.* Planned and executed chaos tests to evaluate the fault tolerance of the different services within the company, leading to finding more than 10 different potential causes of downtime, and dealing with them beforehand.

* Led the engineering team of Core, including 4 software engineers and a product manager.* Reduced the response time of the most frequently called APIs of the system by 45% by improving the caching mechanisms and retrieving data from other services asnynchronously.* Architectured a critical part of Core based on the Saga pattern, solving data dependency between multiple microservices and reducing the response time by 10%, while decreasing the total database size by 25%.* Participated in the company’s recruitment process, including technical and code interviews, and task reviews.

* Developed and maintained features on a large-scale critical service, Core, responding to 10000 requests/minute.* Optimized the memory usage by 20% and CPU usage by 10% on the Core service by improving codes and algorithms.* Doubled the productivity of the support team by automating multiple manual tasks based on their needs.* Boosted the sales of Triboon, a subsidiary of Yektanet, by 40% by integrating it with the rest of Yektanet’s ad services.* Increased the coverage of tests on Triboon from 60% to 80%, resulting in a 30% decrease in errors. * Mentored 4 new software engineers, onboarding them and providing training sessions and guidance.* Redesigned and launched a legacy message sending service, adding multiple features and simplifying the workflow.* Added a task queue and asynchronous workers to the service, scaling it to be able to send 100000 messages per hour, including Emails, SMSes, and notifications.* Added tests to the message sending service, covering 70% of the code base.

Designed and graded various assignments, quizzes and computer assignments.Courses: - Database Design: Quiz on database fundamentals (SQL, ER Diagrams, Relational Algebra and Calculus, Normal Forms) - Operating Systems: Quizzes on operating systems basics and thread management. Computer Assignment on memory management. - Realtime Embedded Systems: Mentored 3 groups on their course project.