Hari Kanumilli

• Strategic initiative for merger of Vodafone and Three in UK telecom market.
• Project focuses on building migration platform to enable upgrade-eligible customers from merged entity to seamlessly transition onto Vodafone systems, products, and services.

Tech stack: Java 21, Spring boot, AWS SNS, AWS SQS, AWS ECS, AWS Lambda, SecretsManager, API Gateway, AWS S3, ALB, etc.

Responsibilities:

• Design and development of SIMO & Handset upgrade platform for migrating customers using AWS capabilities.
• Developed cross-brand customer pre-population architecture to enhance checkout experience for migrating customers.
• Designed solution for cross-domain order processing, analysing IT specifications, and architecting integration patterns to enable seamless data exchange between Digital microservices and TIL backend services during migration.

• WEF – Digital Transformation - Vodafone Republic of Ireland
• Transformed monolithic application into microservices for broadband, mobile (PAYM/billpay), payG, SIMO acquisition journeys, enhancing scalability and maintainability

Tech stack: Java 11, Quarkus, MongoDB, Contentful, Kubernetes, Next.js, AWS ECS, AWS Lambda, Kafka

Responsibilities:

• Led decomposition of legacy monolithic platform into independently deployable microservices aligned to domain boundaries, containerized and deployed using AWS ECS to improve scalability, resilience, and release velocity.
• Designed and implemented reusable Shopping Cart, Checkout and Prefulfiment microservices as shared domain services, enabling products from multiple customer journeys to be added and processed through a unified checkout flow.
• Architected event-driven microservices for customer order processing using SNS for pub/sub messaging and SQS for reliable queue-based consumption, with Apache Camel for routing and transformation logic, ensuring scalable and resilient order workflows.
• Designed serverless lifecycle management for shopping carts using AWS Lambda, implementing scheduled and event-based cleanup strategies to reduce stale session data and optimize platform performance..

Modernize the legacy telecom commerce platform by transforming the eShop monolithic app on Oracle ATG into a scalable, cloud-native microservices architecture on AWS, enabling improved agility, resilience, and seamless digital customer journeys.

Tech stack: JDK 11, Spring boot, Spring cloud, Docker, Apache Camel, Redis, React JS, AWS SQS, AWS SNS, AWS ElasticSearch, AWS Fargate, Dynamo DB, API gateway, ALB, AWS CI pipeline, Azure Code repo (Git based)

Responsibilities:

• Design the HLD/Solution Blueprint for new requirements by discussing with Product Owners for Web and Mobile App.
• Designed and Developed end-to-end checkout solution that enabled seamless product purchases through a unified and scalable journey.
• Integrated multiple payment methods including credit card, PayPal Credit, and loan-based financing options through secure payment orchestration.
• Implemented split-delivery capability, enabling orders containing multiple products to be fulfilled through different delivery channels based on availability and logistics rules.
• Architected regulatory-compliant pre-contract information service aligned with Ofcom requirements, ensuring delivery of mandatory contract summary and pricing transparency to customers before checkout confirmation.
• Designed, deployed, and supported various microservices for digital journeys—including Inventory, Customer Account, Payment, and Order services—leveraging AWS ECS/Fargate, Lambda, SQS, SNS, and DynamoDB for scalable, decoupled service architecture.

Macy's is one of the US premier omnichannel retailers with a robust e-commerce business, rich mobile experience and a national store footprint. Objective of the program is to design and develop a unified price management tool for Merchant teams that provides real time, location-level ML recommendations with exception-based workflow.

Tech Stack: Java 11, Spring Boot, Spring Web flux, Kafka, Google Cloud

Responsibilities:

• Translated business requirements into Epics, Features, and User Stories, ensuring backlog readiness and alignment with solution design while mentoring teams on effective feature implementation and improving overall delivery quality.
• Led code quality and architectural governance through code reviews, enforced best coding practices, and maintained code coverage across multiple microservices repositories, enhancing system reliability.
• Designed and implemented asynchronous, non-blocking microservices using Spring WebFlux, improving overall system performance, scalability, and resource efficiency.
• Developed reactive data access layers with R2DBC and ReactiveCrudRepositories, enabling high-throughput, low-latency microservices and equipping teams with reactive programming patterns to enhance system performance.

Verizon is an American wireless network operator. Objective is to transform legacy b2b apps to microservices architecture so that services can be scaled individually and improve the performance of the applications.

Tech Stack: Java 11, Spring Boot, Elastic search, GIT, Maven, Kafka

Responsibilities:

• Transformed legacy apps into microservices, enabling b2b customers to view, create, and update account and usage details more efficiently.
• Developed event-driven microservice with RabbitMQ, enhancing system responsiveness and scalability.
• Implemented scheduled tasks with spring schedulers to automate processes and improve task management.
• Evaluated code for adherence to quality guidelines.