May 2020 – Apr 2021 · 11 mos

• Helped in developing System Design curriculum
• Took several System Design classes for 300+ students. Linked the videos for my famous class on "How to tackle Capacity Planning when solving large-scale system design interview questions"

Jan 2020 – Apr 2021 · 1 yr 3 mos · Noida, Uttar Pradesh, India

• Working as Head of Engineering in Ads Platform. Building a scalable and distributed platform to serve meaningful ads to buyers at the peak traffic of 100k requests/second. Productionizing machine learning models to better serve the customers and sellers.

Jun 2019 – Dec 2019 · 6 mos · Noida, Uttar Pradesh, India

• Transformed legacy system into a solid & scalable platform by following best practices in software development & SRE - Chaos Testing, CI/CD Pipelines with integration tests suite, Monitoring, Capacity Planning, and AB Testing, Trunk Based Dev - Grew revenue by 2x and incidents reduced by 75%
• Planned and executed critical reorganization where Devs from 3 distinct tribes were assimilated into one Ads Tribe. Built consensus and managed expectations, knowledge transfer and deliverables for 3 tribes for 3 months concurrently. Grew Ads tribe from 20 to 32 engineers in 3 months.
• Scaled the services to serve 35K QPS from the previous capability of 20K QPS by adding caching, making code asynchronous, and a lot of code improvements. Increased revenue by 2x.

Apr 2018 – May 2019 · 1 yr 1 mo · Noida, Uttar Pradesh, India

• Managed and Coached 2 teams in parallel.
• Designed & developed “Virtual Credit Card (VCC)”. VCC was successfully taken over by OVO
• https://www.tokopedia.com/ovo-paylater/
• Designed & Developed “E-Gold” platform where we partnered with Indonesia's biggest gold service Pegadaian. This project is generating good revenue. https://www.tokopedia.com/emas/
• Designed & developed "Gift Card" service -- https://www.tokopedia.com/gift-card/
• Delivered the “Deals by Location” platform by using Elasticsearch Geolocation and Redis.

Dec 2017 – Mar 2018 · 3 mos · Noida, Uttar Pradesh, India

Sep 2014 – Nov 2017 · 3 yrs 2 mos · Gurugram, Haryana, India

• Designed & Developed revenue credits service for 10 Million users. Migrated >400GB MongoDB data to MySQL. Increased customer trust as data became consistent. Boosted NPS score by 10%
• Re-architectured Logistics partner integrations to support ease of integration, security, rate limiting & throttling. Decreased efforts from 7 to 2 days. System created and tracked 10 Million requests/day.
• Decreased MySQL latency by 80% by query optimizations, generating explain plans and adding in-memory caching. Wrote load testing script for MySQL. Did capacity planning for flash sales.
• Developed dashboard that tracks live status of 10 Million courier packets with multiple logistics companies. Enabled the ops team to observe the anomalies and work effectively with end users.
• Technology: Java8, Kafka, Redis, AWS API Gateway, Nginx, MySQL, MongoDB

Dec 2010 – Aug 2014 · 3 yrs 8 mos · Hyderabad, Telangana, India

• Team: eCommerce Foundation Technologies (ECFT)
• Description: ECFT is responsible for building platform technologies for Amazon consumer.
• Developed a service that archived terabytes of data from Oracle to S3 using Java and messaging queues.
• Performed Load Tests, Capacity planning and game days for Black Friday & Cyber Monday readiness.
• Designed and developed the “Automated workflow” that audits the readiness of service and infrastructure for high-traffic sale events like Black Friday and Cyber Monday.
• Part of team that developed Amazon-wide framework for “Zero-Infrastructure Operations” that saved around 36000 developer hours by completely automating a service-launch.

Jan 2009 – Dec 2010 · 1 yr 11 mos · Hyderabad, Telangana, India

• Team: Infinys Centre of Expertise - Centre of Excellence (COE)
• Worked on critical Rating & Billing products for telecom domain. Used C++, PSQL, and Oracle DB.

Sep 2006 – Jun 2007 · 9 mos

• Worked on critical Rating & Billing products for telecom domain. Used C++, PSQL, and Oracle DB.