Sagar Karakala

Sr. Full Stack Developer / Lead Developer at DTCC

Led cross-functional teams across Java, Angular, and DevOps to deliver high-quality enterprise applications. Architected scalable Java microservices using Spring Boot, Kafka, API Gateway, and event-driven patterns; migrated SOAP to REST; implemented DevSecOps pipelines with SonarQube and Veracode; built IaC using Terraform and CloudFormation on AWS and GCP; containerized with Docker and Kubernetes (EKS); optimized deployments for scalability and reliability; steered architecture sessions and defined end-to-end solutions.

Lead Java Developer at JP Morgan

Updated build configurations for Java 11, resolved dependency conflicts, and migrated legacy Java 8 microservices to Java 11. Implemented event-driven architectures with Apache Kafka and IBM MQ, built API Gateway for centralized routing and authentication, and orchestrated blue-green deployments on AWS ECS and Azure AKS. Automated provisioning with Terraform; improved startup times, memory usage, and TLS 1.3 security; collaborated with DevOps to update Docker images and pipelines; designed scalable, fault-tolerant integrations and modernized core banking workloads.

Java Software Engineer at Health Edge

Delivered features in an Agile team; developed and consumed SOAP web services, defined WSDL contracts, and managed XML serialization. Implemented EIPs via Apache Camel, migrated packaging to OSGi/Karaf, and built REST APIs and React SPAs. Diagnosed Linux-based issues via logs and thread/heap dumps; configured Apache HTTP Server; designed data pipelines for internal and vendor integrations; wrote unit and integration tests.

Sr. Integration Developer / Microservices Developer at Boston Scientific

Designed and implemented Enterprise Application Integration (EAI) and SOA solutions; built JMS/IBM MQ producers and consumers; developed SOAP services and ESB flows (IBM IIB/WebSphere). Migrated legacy integration platforms to modern routes; implemented content-based routing, canonical data models, and XSLT transformations; built Spring Boot microservices deployed to AWS/Azure; integrated with Kafka and REST APIs; created robust CI/CD pipelines with Jenkins, Maven, and Artifactory.

Java Web Developer at Novartis India

Developed JAX-RS based APIs; implemented responsive UI with Bootstrap and AngularJS; enforced multi-user access controls; designed asynchronous inter-site communication using Java 8 with CompletableFuture; used ActiveMQ for messaging; secured inter-system communications with TLS; built JMS consumers for queue processing; integrated SOAP/REST services and ESB components; worked on Oracle and PostgreSQL integration.

Java Software Engineer at ADP

Developed high-performance modules (C++), improved memory management and performance; diagnosed memory leaks; redesigned algorithms; built automated test harnesses for volume and latency testing; contributed to derivatives trading system features; built Python automation scripts for GUI testing; developed cross-platform UI using Qt; leveraged STL for reusable components.

Sr. Full Stack Developer/ Lead Developer at DTCC

Led cross-functional teams across Java, Angular, and DevOps to deliver high-quality enterprise applications. Architected DevSecOps pipelines to automate security compliance and code quality. Engineered scalable Java microservices using Spring Boot and distributed patterns; containerized deployments with Docker and Kubernetes; exposed AI microservices through API Gateway. Defined API specifications with Swagger/OpenAPI and implemented IaC with Terraform and CloudFormation. Designed cloud-native architectures on AWS and Azure, improving scalability, reliability, and cost efficiency. Modernized legacy systems by converting SOAP to REST, improving performance and usability.