Dennis Chacko

• Member of the Architecture team providing guidance on microservices and cloud architectures
• Provide guidance on architecting the organization's SAAS platform to support multi tenancy
• Provide guidance on SSO implementations with customers using both SAML 2.0 and OIDC protocols
• Liaison with product owners on the platform's features, and provide high level designs to development teams
• Review low-level designs of development teams as part of the architecture review process
• Co-ordinate the development of the platform across 17 development teams across North America and Europe
• Provide guidance on correct usage of various AWS technologies such as API Gateway, Lambda, Dynamodb (Single Table Design Pattern)
• Evangelized the Design First methodology for API design using SwaggerHub and OpenAPI specifications
• Collaborated with AWS professional services to create an CI/CD pipelines and an IAC (infrastructure as code) library using AWS CDK and Terraform
• Design the Policy Based Authorization Control (PBAC) authorization framework using Open Policy Agent and Rego

• Core member of the team responsible for the design, implementation and compliance of the California Consumer Protection Act (CCPA) within Walgreens
• Helped evangelize agile methodology for SAAS implementations within the organization
• Reviewed vendor software solutions to confirm that Walgreens corporate and technology standards and guidelines were met
• Conducted SSO integrations with various SAAS products and Walgreens using the SAML 2.0 protocol
• Designed REST based APIs for integration between Walgreens and third party SAAS vendors
• Participated in architecture presentations with the Technical Review Board for on-boarding SAAS vendors.

• Designed and built SOAP/REST based micro-services using JAX-WS and JAX-RS specifications
• Designed a Generic Build and Deployment engine to support deployment of micro services across multiple Weblogic clusters as part of the DEVOPs initiative
• Leveraged Oracle Service Bus for service orchestration, mashups and routing
• Designed and implemented BPEL-based processes using Oracle SOA SUITE
• Consulted with Infrastructure teams on deployment strategies for the various SOA and middleware components
• Participated in multiple Agile teams providing architecture oversight with respect to SOA, Microservices and Oracle Fusionware architecture
• Member of the SOA, Java and Webservices best practice groups for setting enterprise wide best practices and standards
• Mentored junior developers and .NET developers on Java/JEE/Oracle Service Bus best practices.

• Mentored the team on the JSF framework for UI screens using AJAX-enabled JSF components
• Designed the task distribution framework to efficiently distribute tasks among a dynamic set of live servers at runtime
• Additional features included auto-discovery of new servers as well node failure detection at runtime
• Tasks pending on a failed node is re-distributed to the remaining live servers
• Re-factored the existing code base for easier maintenance
• Built REST-based services using Apache CXF's JAX-RS implementation
• Streamlined the build process using maven as the build tool
• Configured continuous integration using Apache Continuum and Maven
• Helped the development team to increase the JUNIT code coverage from 0% to over 50% in a span of 3 months.

• Lead the Content Access Framework module team
• Designed and developed the REST services to provide access to the media content
• Evangelized the use of Maven/Continuum as the project's build and continuous integration system
• Introduced the Spring Framework and Hibernate in the project with the CAF as the initial module to leverage these technologies.

• Co-lead for the Groupnet 403(b) application
• Lead the technical teams for the Auto-Enrollment, EDM and QDIA projects
• Interacted with the EDM business analysts to understand the over 500+ insurance related Business Rules and helped incorporate them in ILOG JRules Business engine
• Oversaw the design/development/testing/integration of the 500+ insurance related rules with JRules technical team and the EDM JEE application team
• The insurance rules related to the life, disability, dental insurance products sold by Lincoln Financials
• Designed the rules invocation framework for invoking proprietary rules implementations likes JRules via a standard API
• The framework abstracts out invocation details such as remote RMI invocations (in case of EJBs) or direct invocations (via JRules API)
• Setup the Continuous integration environment using C1 software such as Hudson/Continuum
• Part of the enterprise architecture team responsible for building common enterprise frameworks such as audit framework, service controller framework, single sign-on and encryption etc
• Designed the environment configuration framework for configuring applications as they move through various non-prod and prod environments
• Mentored the team in best practices for the optimal use of Hibernate and Spring Framework.

Java Development assignments at:

• AT&T
• Blue Cross Blue shield of Illinois
• MCI Worldcom
• JP Morgan and Chase (Bank One)
• Kemper Insurance