Abhishek Pattanayak

Leading the development of a unified Returns Management System (RMS) for Walmart International, aimed at consolidating multiple regional return platforms into a single, scalable solution. Currently focused on merging the Mexico and Canada RMS platforms into a common global platform, which will serve as a blueprint for onboarding additional international markets.

Key Contributions:

• Architected and developed microservices using Java, Spring Boot, and React to build a modular, reusable returns management platform.
• Drove system design for core RMS components including return workflows, eligibility validation, and refund orchestration, ensuring scalability and maintainability.
• Collaborated with global cross-functional teams to unify business logic and eliminate platform discrepancies across international markets.
• Enabled seamless migration of return data and services, ensuring backward compatibility and minimal disruption to customer experience.
• Implemented scalable, fault-tolerant patterns to support cross-border return handling and logistics operations.
• Mentored junior engineers and conducted design/code reviews to maintain code quality and ensure adherence to platform standards and best practices.

Designed and developed a Fraud Analysis Dashboard used by fraud analysts to investigate suspicious return behavior involving customers, store associates, and delivery drivers. The dashboard serves as a critical tool in identifying potential collusion and return abuse patterns across markets.

Key Contributions:

• Built an interactive fraud analysis dashboard using React and Spring Boot, integrating with real-time data pipelines and ML-generated risk scores from Data Engineering and Data Science teams.
• Enabled dynamic filtering, interactive visualizations, and drill-down capabilities to help fraud analysts investigate high-risk transactions with ease and accuracy.
• Collaborated closely with Risk, Legal, and Data Science teams to ensure product features met compliance requirements and fraud detection goals.

Designed and implemented a secure account recovery system that helps users regain access by verifying their identity through personalized questions derived from their order and transaction history.

Key Contributions:

• Developed a dynamic questionnaire engine that generates user-specific recovery questions based on historical data such as order dates, item categories, payment methods, and delivery addresses.
• Collaborated with Legal and Risk teams to ensure all recovery questions adhered to privacy, compliance, and data protection regulations.
  

Led the migration of a critical investment banking application from a monolithic legacy system to a modern microservices-based architecture, improving scalability, maintainability, and performance.

Key Contributions:

• Participated in High-Level Design (HLD) and Low-Level Design (LLD) to decompose a legacy monolithic system into domain-driven microservices architecture.
• Took ownership of a key business module, handling requirement analysis, design, development, testing, and production deployment end-to-end.
• Developed secure, scalable services using Spring Boot, JPA/Hibernate, and Spring Security, ensuring reliable access control and robust data handling.

Contributed to the design and development of a modern, secure web portal for Tiffany & Co., aimed at enhancing customer experience and operational efficiency through a robust microservices backend.

Key Contributions:

• Designed and developed backend microservices using Spring Boot, JPA/Hibernate, and Spring Security to ensure secure and scalable service integration.
• Worked closely with architects and stakeholders to define technical specifications and translate business requirements into system design.
• Actively collaborated with UI developers, QA engineers, and distributed backend teams across multiple global locations to ensure smooth end-to-end delivery.

Led the development of a web-based application for Avis Car Rental, focused on streamlining customer interactions and enhancing digital rental experiences through a secure and scalable architecture.

Key Contributions:

• Developed core modules using Spring Boot, Hibernate, Spring Security, and integrated with Adobe Experience Manager (AEM) for content-driven components.
• Led a development team of 3 engineers, managing task allocation, code reviews, and technical guidance to ensure timely delivery.
• Acted as a key coordination point across UI development and QA teams, facilitating cross-functional collaboration across multiple global locations.
• Participated in requirement analysis, technical documentation, and design reviews to ensure clarity and maintainability of the system.

Contributed to the development of a web application portal for FedEx, aimed at enhancing operational workflows and customer-facing services through a reliable and modular backend architecture.

Key Contributions:

• Designed and developed backend components using Spring MVC and Hibernate, focusing on clean separation of concerns and efficient data persistence.
• Collaborated with UI and QA teams across distributed locations to ensure seamless integration, timely testing, and smooth feature rollouts.
• Involved in detailed requirement analysis, technical documentation, and design reviews to align implementation with business goals.
• Actively participated in issue triaging and resolution for post-production incidents, improving platform stability and user satisfaction.