What you Do on a day-to-day basis:

Attend multiple meetings and work with Business Partners, Business Analysts, Enterprise Architecture to understand requirements and Use-Cases
Create Solution Design Artifacts in Confluence, to illustrate the High-Level Design for different scenarios and use-cases
Present the Solution to stakeholders (including Snr Management), and collect feedbacks
Pass the Solution Design to Development team to create their Detailed Design, and proceed with coding, etc
Support the teams throughout the project implementation, if there are any question or changes on High-Level Design

What you Deliver for a given Project:

High-level Solution Design (in Confluence)
Including Diagrams, Flows
Possible Presentations about different Solution Options for discussions purposes

Domain:

Application Security:

Enterprise Integrations:

Solution Designer/Architect