• Led cross-functional teams (SRE/Platform/DevOps 20+ team members) to build and operate a large scale Risk system, enabling real-time fraud detection for 100M+ monthly active users, handling 10K+ TPS during peak hours

• Design and implemented of a state-of-the-art ML feature store supporting real-time and batch data processing, which can process billions of real-time events daily and 100+ PB batch data.

• Improved p99 of fraud check requests from 100ms to 15 ms in peak hours

• Introduced Operational Excellence process to improve system reliability from 99.9% to 99.99%

• Tech Stack: AWS/Kubernetes/Terraform/Ansible/Spark/Temporal/EMR

• Led cross functioning team (SRE/Backend/Data Engineer)to build an advertising platform for paytm India.

• Worked with product/sales/business operations to prioritize product features and was able to generate 1 million USD per month within 1 year after launch of the business.

• Tech Stack: Spring Cloud/Kubernetes/Kafka/AWS/MySQL/Spark/BigQuery/Terraform

• Led a team (Backend and SRE) to develop a payment system to support Paytm Canada’s business, including bill payments and merchant acquiring.

• Took only two months to build a PCI-DSS compliance system to store and process user credit cards/bank accounts.

• Led a team (Backend and SRE) across Canada/Japan/India to build the core payment system for PayPay (www.paypay.com top 1 payment app in Japan) in 3 months.

• Scaled the system to support 30 million+ users/1 million+ merchants/1000+ payment TPS.

• Tech Stack: Spring Cloud/Kubernetes/Kafka/AWS/MySQL/Kafka/TiDB