Develop reusable Java libraries and Quarkus extensions for backend APIs used across multiple engineering squads, emphasizing modularity, maintainability, testability, and performance. Validate shared components through performance tests, reviewing heap usage, garbage collection, memory stability, and saturation under load. Support Spring-to-Quarkus migrations by resolving technical tickets and integration blockers involving Kafka, Redis, and related platform components. Separate framework-related migration issues from existing application technical debt, helping squads identify root causes and remediation. Guide squads in the reliable adoption of shared components while respecting banking security and confidentiality requirements.

Designed and implemented backend solutions for a large-scale compensation and CRM platform, translating complex business requirements into maintainable services. Developed asynchronous Java and Spring Boot services for enterprise CRM and compensation workflows, integrating Azure services with Oracle PL/SQL-based business logic. Implemented OAuth 2.0 and MFA-protected authentication flows and secure Azure Blob Storage handling for business-critical files. Built Angular components consuming REST APIs and contributed to CI/CD delivery through Azure DevOps within a distributed Scrum team.

Led migration from relational SQL data models to MongoDB, including NoSQL schema design and a dedicated SQL-to-NoSQL transformation service. Developed Spring Boot microservices using Factory and Strategy patterns, secured with JWT/OAuth2 and exposed through REST and GraphQL APIs. Integrated telecom systems through SOAP, NETCONF, and RESTCONF interfaces and implemented advanced MongoDB aggregation pipelines. Containerized services with Docker and deployed workloads on AWS EC2; expanded unit and integration test coverage with JUnit and Mockito.

Built microservice-based backend solutions for electronic billing, e-commerce, online education, notifications, auditing, payments, and configuration management. Integrated electronic invoicing with SUNAT and implemented e-commerce capabilities including catalog, shopping cart, payments, user management, JWT security, and Spring Cloud services. Implemented asynchronous email/SMS notifications with Kafka, Twilio, and SendGrid; centralized auditing with Elasticsearch and Kibana. Developed dynamic business rules with Drools, secure OAuth2 payment integrations with digital-signature validation, and configuration management with Spring Cloud Config and event-driven refresh. Worked with PostgreSQL, Oracle PL/SQL, Docker, Azure Data Factory, and Azure Databricks in data and integration workflows.

Maintained and enhanced the VUCE foreign-trade application using Java, Spring Boot, and Spring Data. Improved backend behavior and database access through PostgreSQL query/schema optimization, while delivering supporting Angular UI enhancements. Added unit tests to improve service reliability and regression coverage.