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Chandan Kumar
Open to opportunitiesSoftware Development Engineer II
I build reliable payment-processing microservices and distributed backend systems in Java.
IndiaSoftware Development Engineer II at Zeta
About
At Zeta, I own and maintain a PostgreSQL-backed, Apache Flink-powered ACH processing platform that handles millions of ACH transfers and generates NACHA files for merchant settlements. I reduced service cold-start p99 latency from 10 seconds to 300ms by improving connection reuse, startup warm-up, and asynchronous execution.
I instrumented ACH connector services with Prometheus and Grafana to speed recurring incident diagnosis, and optimized a Drools rule engine supporting 10+ configurable transaction-processing flows.
Previously at ZopSmart, I contributed to a 20+ microservice Spring Boot backend, built Kafka-driven workflows, deployed Kubernetes services with Helm, reduced endpoint latency by 50%, and created CI/CD validation pipelines that reduced deployment rollback rates by 70%.
Experience
Software Development Engineer II
Own and maintain a PostgreSQL-backed, Apache Flink-powered ACH processing platform on a multi-tenant system, handling distributed processing of millions of ACH transfers including NACHA file generation for merchant settlements. Diagnosed a service cold-start latency issue, reducing p99 from 10s to 300ms, and instrumented the ACH connector service with Prometheus metrics and Grafana dashboards.
JavaSpring BootPostgreSQLApache FlinkKafkaKubernetesDockerHelmPrometheusGrafanaDroolsMulti Tenant ServicesDistributed SystemsPerformance Optimization
Education
Amity University
Bachelor of Technology in Computer Science with a CGPA of 7.5/10.