Sandeep Kumar B. Email & Phone Number

San Antonio, Texas Metropolitan Area

• Migrated legacy Mortgage Loan Origination backend applications into AWS Cloud and Microservices architecture.Designed and developed large scale enterprise applications Rest API's using Java, Spring Boot, JPA, Hibernate.• Implemented API Gateway feature for front end applications to communicate with the 3rd party vendor upon successful authorization from the backend using the OAuth2 token and multiple query parameters on multiple environments.• Implemented Java8 features like Stream APIs, Lambda expressions, Functional Interfaces into the backend applications.• Implemented Asynchronous Reactive Flux and Mono to effectively manage large amounts of data and seamlessly invoke number of downstream services.• Actively participated in all Agile events such as daily scrum meetings, backlog refinement, retrospective, PI planning.• Participated in all phases of application development and deployment from development to production environments.• Mentored junior developers and collaborated with cross-functional teams to fix any outages.

Bellevue, Washington, United States

• Integrated the T-Mobile’s E-Commerce Microservices applications with the even-driven architecture using Reactive programming for handling streams of data and events.• Integrated the E-commerce platform with external systems such as payment gateways, shipping providers, inventory management systems, and customer relationship management (CRM) software.• Implemented secure authentication and authorization mechanisms using Spring Security, OAuth, or JWT (JSON Web Tokens) to protect sensitive customer data and prevent unauthorized access to E-Commerce systems and resources.• Implemented asynchronous programming paradigm applied transformation, filtration and combining streams of data operations for enabling the applications to handle large number of concurrent connections and achieve high throughput and responsiveness of the E-Commerce application.• Implemented robust backend functionality including user authentication, product management, cart functionality, order processing, and payment integration using Java and Spring Boot.• Proficient in developing SPAs using Angular, leveraging its features like data binding, routing, and dependency injection to build interactive and efficient web applications.• Developed Frontend Angular components, including modules, services, directives, and pipes, adhering to Angular best practices and coding conventions to ensure maintainability and scalability of the application.• Designed, developed, and maintained both frontend and backend components of the e-commerce platform using Java for backend services and Angular for frontend development.• Eliminated boilerplate code by implementing Java8 features such as Stream APIs, Lambda Expressions, Date and Time API and Functional Interfaces. • Optimized PySpark jobs using Azure Databricks, DataFrames, and Datasets API to perform complex data transformations and analytics tasks, resulting in enhanced performance and scalability.

Woonsocket, Rhode Island, United States

• Developed and maintained Health and Beauty products, E-Commerce and Healthcare Service applications, including backend services, APIs, and web interfaces using Java, Spring Framework.• implemented efficient data models and database schemas using MySQL, PostgreSQL to support complex E-Commerce workflows, including product catalog management, order processing, and customer management.• Integrated third-party APIs, and services into Angular applications, including authentication providers, mapping services, payment gateways, extending application functionality and interoperability.• Integrated search functionality using technologies like Elasticsearch to enable fast and accurate product search and navigation within the E-Commerce platform, improving user experience and driving higher conversion rates.• Integrated with inventory management systems and supply chain partners to optimize inventory levels, track stock availability in real-time, and automate order fulfillment processes, reducing stockouts and improving inventory turnover.• Developed backend logic and business logic components using Java and Spring framework, ensuring high performance, reliability, and scalability.• Utilized Spring/JPA/Hibernate for Object Relational Mapping (ORM) and data persistence for interaction with SQL Server, MySQL and Oracle relational databases.• Developed Spring Batch jobs for processing large data processing, from various sources, applied transformation and exported the CSV data for downstream Batch jobs for further batch processing.• Debugged and Troubleshooted Spring Batch job failures and fixed the bugs for efficient data processing and report generation.• Performed integration tests for REST API’s using Junit Mockito testing framework and test container spin up Docker containers with database instance for covering a specific scenario including both positive and negative test cases.

Chennai, Tamil Nadu, India

• Implemented features and functionality to support various aspects of e-commerce operations including product catalog management, checkout process, order fulfillment, and customer account management.• Implemented and maintained integrations with third-party services and APIs such as payment gateways, shipping providers, and inventory management systems.• Optimized database queries and data access patterns to ensure fast and efficient retrieval of product information, user data, and transaction records.• Utilized JMS to established message communication. Publisher-Subscriber method was used for data loading and Point-To-Point method of JMS was used for event processing.• Developed SOA Web Services using XML, XPATH, XSD, SOAP, WSDL and Apache Axis. • Advanced search functionality to retrieve Business/Residence customer information. Using java, JSP, Servlets, SQL, Oracle, JavaScript, DHTML, CSS.• Created struts-config.xml, application-resources properties for the project.• Implemented Session beans to implementing Session facade design pattern.• Developed Data access bean and developed EJBs that are used to access data from the database.• Developed data-centric web applications for the Oracle environment using APEX 3.2• Developed the applications using WebLogic to create the transactional business logic like EJB, JSP of a WebLogic Application.• Transactions for the result sets of queries were processed by business logic methods using Session Bean and Entity bean.• Involved in the developing of ANT build script and deployment in WebLogic 9.2 on Linux platform. • Used Log4j for logging mechanism and developed wrapper classes to configure the logs.• Extensively used PL/SQL for writing queries and Stored procedures in Oracle Database.• Developed the Entity Beans to connect the database.• Written JUnit test cases for validating the business logic.

Master'S Degree, Computer Science

Activities and Societies: Baseball, Cricket

Bachelor'S Degree, Computer Science