- Adopting open-source frameworks for specific needs (e.g. SAML SP lib  to particular IDP)

- Integrating your legacy application with new\exotic services e.g. standard or custom web framework to authentication&authorization  product (ClearTrust, Trustbuilder, SAML and OAuth libs, … )

- Troubleshooting performance bottlenecks and suggesting\implementing optimization (e.g. introducing or moving cashing to appropriate layer) 

- Enhancing maintainability via logging\exception handling, performance and health monitoring subsystem, notification and alerting (integration with enterprise solution or custom)

- Secure programming and best practices audit