Responsibilities include:

• Using automated fuzzing approaches to mutate HTTP requests and bypass web application firewalls. (WAF)
• Enhancing User Privacy Using Automatic Isolated Profiles in Browsers by adding an extra layer of security to browsers to prevent re-targeted ads from being displayed which use cookie syncing methods. (PriveShield)
• Analysis of the Impact of Browser Features on Browser Fingerprinting and generating a public list of browser fingerprinting APIs. (Browserprint)
• Organizing and participating in voluntary CTF training groups and web security paper readings.

Tapsi is a private-cab e-hailing and ride-sharing platform equivalent to Uber which is used by millions of users daily. I started there as intern, then was offered a full-time job, and was promoted to senior level later. My contributions were focused on DevOps projects and Software Development including:

• Co-designed the base infrastructure of a project with more than 20 micro-services. This needed communication between multiple teams.
• Improved the product’s performance and number of concurrent rides by 300%. From 5k online rides to more than 20k)
• Reduced web application’s response time by 50% by optimizing inter-service communication between micro-services. Setting up message queues, pub-sub, and stateless http messaging. (Rabbitmq, Redis)
• Deployment automation and containerization of the products’ huge code base. (Docker, Docker Swarm (formerly), Kubernetes, Salt, Gitlab CI).
• Setting up VMware ESXi on company’s servers and managing them via VSphere.
• Managing a hacking incident. Detecting the attack, blocking access, fixing damages, and coming up with security procedures to prevent future incidents.
• Designed and established micro-service log and monitoring systems (Elastic Search, Prometheus, Grafana)
• Data storage, caching, replication, and object storage. (Redis, Mongodb, PostgreSQL, MinIO)
• Load balancing to handle millions of concurrent requests. (Nginx, Traefik)
• Implemented a variety of features for the web application; including user management, media services, and developing a program which simulated the whole ride scenario. (Node.js, Python)
• Implemented a dynamic automatic pricing model based on analyzing ride supply and demand. (Node.js, Python)

I was involved in developing a language learning website which used movie pieces to teach new languages to its users. My Tasks:

• Using Text Mining to examine the language difficulty of a movie by going through its subtitle. (Python)
• Full Stack website development. (Django, HTML, CSS, JavaScript, Bootstrap, MySQL)
• Implement Video Streaming feature for the web app (JavaScript)