Hari Krishna Chirumamilla

About Hari Krishna Chirumamilla

Full Stack Developer with 5 years of experience building scalable, high-performance web apps and enterprise microservices.Skilled in Java 11/17, Spring Boot, React.js, Angular, and GraphQL with a proven record of delivering secure, cloud-native solutions.Experienced across AWS, Azure, and GCP with hands-on expertise in Docker, Kubernetes, Jenkins, and GitHub Actions for CI/CD.Passionate about designing robust APIs, implementing OAuth2/JWT security, and managing data in PostgreSQL, MongoDB, and Redis.Strong focus on performance monitoring with Prometheus, Grafana, and ELK Stack to ensure reliability and uptime.Collaborative Agile team player who drives sprint success, code quality, and knowledge sharing across teams.Skilled at optimizing deployments, reducing defects, and improving delivery velocity for mission-critical systems.Always eager to leverage cutting-edge technology to solve complex problems and create business impact.

Experience

1. Full Stack Developer

   Shopify

   Jan 2024 — Present · US

   Designed and implemented RESTful and GraphQL APIs using Java 17, Spring Boot, GraphQL Java, and SOAP, enabling seamless integration with Shopify Admin APIs and handling over 5 million product and order records with less than 150ms response times. • Achieved greater than 95% test class coverage using JUnit 5, Mockito, TestNG, and Jasmine, ensuring stable builds and enabling test-driven development (TDD), regression testing, and continuous integration and deployment (CI/CD) pipelines. • Developed secure microservices using Spring Security, OAuth 2.0, JWT, and NodeJS, ensuring role-based access control for both internal users and third-party Shopify apps. • Built interactive UI dashboards using React.js, Redux, GraphQL, and Material-UI, integrating HTML, CSS, JavaScript (JS), and legacy jQuery modules, improving UX performance by 20% and achieving full WCAG accessibility compliance across responsive views. • Orchestrated and deployed microservices on Google Kubernetes Engine (GKE) and AWS ECS, using Docker, Helm, Terraform, and OpenShift for scalable infrastructure, backed by PostgreSQL, MongoDB, Redis, and Kafka for event-driven communication. • Reduced production defects by 30% and achieved a 100% sprint delivery rate over 8 sprints with zero story carryover, through Agile/Scrum practices, rigorous code reviews, and continuous improvement driven by CI/CD tools like GitHub Actions and Jenkins. • Processed and validated high-volume Shopify datasets using Postman, Salesforce Workbench, Shell scripting, and data pipelines involving relational databases, enhancing catalog, inventory, and order sync across distributed systems. • Monitored and optimized end-to-end system performance using Prometheus, Grafana, and ELK Stack, enabling proactive alerting, incident response, and MTTR reduction by over 40%, while leveraging cloud computing tools for real-time diagnostics.

Education

• Sacred Heart University

  Master's degree, Computer Science and IT

• Acharya Nagarjuna University

  Bachelor's degree, Electronics and Communication Engineering