Refactored backend modules in digital transaction processing using Java 17, later upgraded to Java 21 to leverage Pattern Matching, Virtual Threads and Z Garbage Collector (ZGC).

Decomposed the monolithic risk scoring engine into modular services using Spring Boot, improving modularity and enabling real-time fraud detection through an event-driven architecture with Apache Kafka.

Engineered RESTful APIs with Spring MVC and Spring Data JPA/Hibernate, enabling regulatory-compliant ledger postings with ACID transactions, advanced filtering and auditable pagination aligned with SOX and PCI-DSS guidelines.

Developed enterprise-grade financial systems using Java 14, leveraging Lambda Expressions, Switch Expressions and the HttpClient API to optimize ingestion of real-time payment and transaction feeds.

Architected and developed low-latency microservices using Spring Boot, adhering to Microservices Architecture to support real-time payment processing, intra-bank fund transfers and distributed orchestration for anti-fraud workflows.

Designed and maintained both RESTful APIs and GraphQL APIs to enable secure, permission-based data access across compliance dashboards and multi-channel banking applications aligned with FFIEC and OCC regulatory frameworks.

Led Agile delivery for healthcare systems, integrating DevSecOps with Jira and Trello to embed HIPAA-compliant threat modeling and sprint-level risk mitigation.

Developed secure, high-performance RESTful APIs using Java 11, applying Streams, Lambda Expressions and comprehensive validation and sanitization to ensure Protected Health Information (PHI) confidentiality and system resilience in compliance with HITECH guidelines.

Built data-consistent backend layers using Spring Data JPA and Hibernate, implementing parameterized queries, optimistic locking and ORM constraints to ensure safe concurrent access for claims adjudication workflows.

Developed high-performance backend systems using Java 8, Streams and custom algorithms for large-scale data processing in credit approvals, client onboarding and account reconciliation, optimizing throughput and reducing batch latency.

Designed secure and modular RESTful APIs using Spring Boot, integrating with KYC services, credit bureaus and internal loan servicing platforms, ensuring compliance with AML and Know Your Customer (KYC) policies.

Built high-throughput ETL pipelines using Spring Batch to automate ACH settlements, clearing and compliance reports, implementing checkpointing and logging for fault tolerance under FINRA and Basel III regulatory guidelines.

Developed and optimized backend modules using Java 6, applying Factory, Singleton and DAO patterns with multithreading, Streams API and Lambda Expressions to enhance performance in order processing, inventory synchronization and supply chain management.

Built modular microservices with Spring Boot and Hibernate, enabling real-time product availability checks, membership validations and dynamic discount engine functionality for omnichannel retail operations.

Delivered business-critical workflows such as order tracking, returns and account updates using Spring MVC, following MVC architectural principles for maintainable and testable transaction workflows.