Designed and built back-end services for the Twilio SuperSIM product. Specifically, orchestration across multiple sub-systems that required distributed systems expertise. The role also involved collaboration with different teams across continents. Written in Java and Scala. Introduced AWS CDK to quickly provision cloud resources. Used AWS step functions to orchestrate workflows across internal and external systems.

Led the Twilio Programmable Conference team. Collaborated with Product teams and other engineering teams to build and maintain the Conference product as we scaled ~10x in volume.

Later, moved to lead the Twilio TaskRouter team (now part of Flex). Major focus was on refactoring the service for scale, performance and observability.

Owner of "media stack" services for the Twilio Voice product.

Rewrote the webhook system from a legacy Twisted (Python) application to Java (Netty) for better scalability, performance and integration with rest of the stack. Required thorough understanding of asynchronous network programming, security (TLS, mitigating SSRF) and defensive programming techniques (throttling, rate limiting etc).

Designed and built a SIP registration system as part of the Twilio Global Low Latency project. Involved deploying services across multiple AWS regions and understanding AWS VPC, networking and firewalls. The backing store was Redis (with a sharding strategy) and the service was written in Java/Dropwizard.

Helped refactor a monolithic Java service that handled all Voice flows into multiple services. Required deep understanding of SIP/RTP. Role involved debugging call flows and interactions between services that spanned almost all Twilio products at the time.