Yeshwanth Kour Sardarni

Store Item Read Orchestration

• Developed reactive GraphQL orchestration microservice in Spring Boot unifying 17 downstream systems into a single API sustaining over 1 billion transactions per minute in production.
• Designed dual REST and native GraphQL integration for core downstream provider using Cassandra-based query store.
• Implemented DataLoader for batching across 50+ GraphQL resolver fields, reducing downstream calls and improving response latency.
• Enhanced service reliability with Resilience4j circuit breakers and mutual authentication with key rotation.
• Created internal self-service console mapping 60+ schemas to source providers, streamlining data access and eliminating manual lookups.
• Engineered CRUD onboarding workflow using Cosmos DB for data access requests, automating processes and replacing manual ticketing.
• Integrated ServiceNow incident data into a unified dashboard, decreasing production incident diagnosis time.
• Led production on-call support via xMatters, triaging and resolving consumer-impacting incidents within SLA to minimize downtime.
• Maintained code quality via SonarQube gates(Coverage, maintainability, security rating) across service life cycle.
• Owned CI/CD across 6 regional WCNP/Kubernetes namespaces with Jenkins-based pipelines and Slack deployment alerting.

Store-Item-Platform

• Worked for the Store Inventory Platform (Tier 0) team, the authoritative source of truth for inventory availability across Walmart US stores, ensuring high availability and scalability using Kafka, REST, GraphQL, NoSQL, and Docker-based cloud-native deployments.
• Participated in the end-to-end SDLC authoring ADRs, coding, testing, debugging, and deployment.while adhering to industry best practices and CI/CD pipelines for consistent delivery across staging and production environments.
• Enhanced inventory tracking accuracy to 95% by integrating real-time updates from 85% of upstream applications via Kafka, processed through containerized microservices deployed in the cloud.
• Developed a novel microservice (Item Inventory Service) exposing a real-time GraphQL API for querying backroom Topstock and salesFloor inventory, deployed in a Kubernetes cluster with autoscaling. Achieved a 30ms SLA and supported up to 33k TPS during peak traffic.
• Specialized in canary deployments and conducted comprehensive testing (functional, regression ,performance, stress) using Dockerized test environments in the cloud, ensuring high system reliability and minimal downtime during production rollouts.
• Conducted performance testing on critical services to validate scalability and responsiveness during holiday peak traffic, ensuring system stability and customer satisfaction.
• Built real-time dashboards in Grafana for services, enabling proactive monitoring of system health andKPIs.
• Integrated Prometheus metrics collection with xMatters alerts, automating incident detection and reducing Mean Time To Acknowledge.
• Leveraged OpenObserve and Splunk for log aggregation, debugging, and root cause analysis during critical incidents.
• Provided on-call production support for Tier-0 services, diagnosing and resolving high-priority incidents, ensuring adherence to SLAs, and minimizing downtime.
• Coordinated with cross-functional teams (Data Engineering, Cloud, and Platform) to enable ELT pipeline deployments in the cloud, ensuring seamless integration with inventory systems.
• Actively engaged in cross-team communications during deployments, incident war rooms, and architecture reviews to maintain system reliability and operational excellence.

Client: KPMG

• Developed and maintained web-based employee management system to streamline HR management of employee records, attendance, and leave requests.
• Built RESTful APIs and implemented core business logic to handle employee, attendance, and leave workflows, enhancing data accuracy and streamlining HR operations.
• Designed and implemented a MySQL database schema using JPA with Hibernate for reliable data persistence.
• Implemented business validation, centralized exception handling, and structured logging to improve backend reliability.
• Ensured transactional consistency across employee and department operations using Spring transactions.
• Optimized database queries and implemented pagination/filtering for efficient employee search and reporting.
• Deployed the Spring Boot application on Apache Tomcat with a MySQL backend, using Maven for build and dependency management.