Working on interactive Data analytics at Uber using Presto. Focus on Data/Query optimization.

Led Presto Query Governance project at Uber using real time insights for scheduling analytics workloads.

Led a Data layout formatting project across Hudi and Presto teams to reformat (parquet) data in order to make queries more efficient. Reduced data read by 25 PB/week.

Co-led a Query result caching project across Business Intelligence (BI) and Presto teams to serve queries using cached results.

Architected and drove Presto express project to make the majority of Presto queries faster using just a fraction of the resources.

Designed and architected a data sampling project to auto rewrite Presto queries using sampled data.

• feature engineering, rules engine, machine learning and enforcement for payments risk engineering on FB platform

• One of the founding engineers in the company

• Implemented synchronous replication in a logical volume manager specially designed for container based storage. Designed and implemented both the control plane and data plane protocols. Implemented resynchronization after failure. (C)

• Implemented a Data Lake by doing a federation of multiple HDFS namenodes (Java/C++)

• Implemented a read cache on top of HDFS for performance (Java)

Architecture, Design and Implementation of storage virtualization subsystem to abstract the storage from the file system layer. Separation of components between the kernel and userspace for robustness and fault tolerance.

Development of resource manager in user space for managing disk resources.

Design of In place upgrade of file system from physical to virtual storage layer.

Development of libraries for memory allocation management and fault injection framework.

REST based interface for client programming.

Smoke, Nightly and Regression test strategy development. Continuous and Torture test strategy development.

C/Python based development.

• Design and development of data protection and disaster recovery solutions for primary storage.

• Synchronous and Asynchronous replication of file systems.

• Design and development of logical replication with storage efficiency; preserving on the wire data duplication from primary to secondary.

• Data preserving In-Volume snapshot restore

• Performance tuning and optimization in LAN and WAN environments.