Oct 2020 – May 2021 · 7 mos

• ➜ Built platform and edge services for Razorpay to power payments for 100s of millions of users.
• ➜ Conceptualising, designing and reviewing other platform services, like A/B platform, authorization service etc.
• ➜ Defining tech charter and OKRs, mentoring, leading tech and RCA reviews in tech-council, tech leadership hiring etc.
• Open-source
• ➜ Designed and built open-source pub/sub system leveraging kafka, pulsar, consul etc. to provide push and pull based subscriptions with capabilities like ordering, retry, dead-letter queues, replay etc. This is being developed as a drop-in replacement for Google pub/sub. https://github.com/razorpay/metro.
• ➜ Implemented support for configurable consistency levels for Cassandra read and write operations in Kong.
• ➜ All Contributions: https://github.com/Kong/kong/pulls?q=is%3Apr+author%3Aabhishekvrshny+is%3Aclosed

May 2019 – Oct 2020 · 1 yr 5 mos

• ➜ Built Notifications platform to provide reliable delivery of notifications through various channels (webhooks, sms, email etc.) at scale. The system is horizontally scalable and provides strict p99 latencies. Scalable upto 30K req/s. Have implemented reliability constructs like QoS, request hedging etc.
• ➜ Conceptualised and built the Edge (API Gateway) and Authentication at the edge for all APIs. End to end design and implementation including writing custom plugins in Kong. Achieved p99 latencies less than 10ms with 50K req/s.

Jan 2017 – May 2019 · 2 yrs 4 mos

• As part of the Cloud Platform Group in Flipkart worked on the following:
• ➜ Bootstrapping Database As A Service, from requirements gathering to design and implementation.
• ➜ Scaled up object storage service to 5 PB, 400+ critical internal customers, 20+ team size.
• ➜ SPOC for all CDN-related things in Flipkart. Regular collaboration with Akamai.
• ➜ Worked on the design and implementation of a distributed and reliable messaging system.
• Open-source
• ➜ Key open-source patches
• Identified, debugged, and contributed fix for a critical race condition in open-source ceph (https://ceph.io/) that would end up deleting data. Also, designed, implemented, and executed a low-cost reconciliation mechanism to identify the extent of the loss due to this bug on multi-petabyte clusters.
• Identified and fixed multiple data leak issues in ceph.
• ➜ All Contributions: https://github.com/ceph/ceph/pulls?utf8=%E2%9C%93&q=+is%3Apr+author%3AAbhishekvrshny+

Jan 2016 – Dec 2016 · 11 mos

• ➜ Worked on Backup and Recovery As A Service for all stateful datastores in Flipkart. This involved an incremental backup core-engine with datastore specific driver (MySQL, MongoDB, etc).
• ➜ Involved in evaluating storage-compute separation in Hadoop to replace HDFS with ceph (using s3a connector).

Jun 2015 – Dec 2015 · 6 mos

• ➜ An early member of the Flipkart Cloud Platform Group, which was commissioned around 2015 to build and operate a private cloud for Flipkart and it's group companies.
• ➜ First engineer in the object storage team. The charter of which was to provide a highly available and fault-tolerant object storage service to cater to storage use-cases of catalog images, invoices, and other static assets.
• ➜ Involved in the functional/non-functional evaluation, benchmarking and productionisation of ceph, an open-source software, to expose an S3 like object store.

Mar 2015 – Jun 2015 · 3 mos · Bengaluru Area, India

• ➜ Ideated, conceptualized and bootstrapped the hyperlocal start-up around the delivery of subscription-based daily needs like milk, eggs, bread etc.
• ➜ Involved in taking the idea from 0 to 1 and piloting it across the first few apartment complexes in Bangalore.
• ➜ Handled initial vendor onboarding, operations, marketing, customer experience, etc.
• ➜ DailyNinja was acquired by BigBasket later.

Aug 2013 – Jun 2015 · 1 yr 10 mos · Bangalore

• ➜ Worked as part of the office of the CTO with the Advanced Technology Group (ATG), which focuses on engaging and evaluating emerging technologies, and trends that may affect the storage industry and the company’s long-term business.
• ➜ Worked on a project (Neuro) to present the components of the storage system as a graph data model to the support engineers for reducing Time To Solution Provided for support cases.
• ➜ I worked on the evaluation, design, and implementation of Graph DBs with the schema to store the instantiated model and present a timeline view of the state of a storage system. US patent was granted for the same.
• ➜ I Also worked on an internal tool (Budweiser) to suggest possible duplicates to a newly found bug and help reduce the number of duplicate bugs filed.
• ➜ I was responsible for taking the idea to production. The system has been deployed since June 2014 and had been correctly identifying about 35% of total duplicate bugs filed on an average.

Jul 2012 – Dec 2012 · 5 mos

• ➜ Underwent a six-month internship as a part of the curriculum for master's degree program from BITS Pilani.
• ➜ I was part of the Advanced Technology Group (ATG), the research wing of NetApp, which is focused on exploring and evaluating the ideas, technologies, and trends that define the future of storage and data management.
• ➜ Worked on a project to investigate and implement an in-memory storage engine interface for SQL and NoSQL databases.
• ➜ The project involved studying the code-base of various open-source relational and NoSQL databases like MySQL, SQLite, Cassandra, RIAK DB, etc to identify their interfaces for storage engines and coming up with a common storage engine (versioned key-value store) for all with individual adapters.
• ➜ The PoC was successfully demonstrated in 5 months. The PoC was later extended to be a full-fledged ATG project.

Dec 2012 – Jul 2013 · 7 mos · Bengaluru Area, India

Jan 2011 – Jan 2012 · 1 yr · Pilani

• ➜ Project Fellow in Student's Welfare Division.
• ➜ Teaching Assistant for Database Systems and Applications (DBSA) undergrad coursework.
• ➜ Various other responsibilities in Work Integrated Learning Program Division (WILPD).

Jun 2010 – Dec 2010 · 6 mos · Hyderabad, Telangana, India · On-site

• Data warehousing and ETL