Karthik S

I’m a Software Engineer who builds scalable full-stack applications with Java Spring backends and modern JavaScript/React frontends. I focus on RESTful APIs, microservices architecture, and high-performance database design (SQL/NoSQL), with a strong base in distributed systems, OOP, and data structures.

At Neurasol, I led an infrastructure upgrade for the Number Administration Service, migrating AWS CDK v1 to CDK v2 and updating deprecated CloudFormation, IAM, and Lambda asset pipelines. I also engineered deployment workflows that introduced a secure hotswap feature, helping reduce local developer deployment times by 40% and sharing reusable templates to unblock other teams.

At Amazon, I designed and implemented the public ImportExternalPhoneNumber API and onboarding workflows for Amazon Connect, including two-way SMS support and automated backend syncing with external services. I delivered scalable omnichannel messaging by automating the import of Amazon Pinpoint SMS numbers into Amazon Connect, reducing AWS resource provisioning latency by 70%, and eliminating manual integration overhead.

I’m especially proud of the reliability work I’ve shipped: I delivered automated disaster recovery and seamless multi-region failover for Amazon Connect customers. By routing traffic through Traffic Distribution Groups, I eliminated manual cross-region synchronization, reduced configuration inconsistencies by 80%, and ensured continuous operations—while integrating AI/ML capabilities into production systems using cloud-native tooling.