Over a two-month period, this developer contributed to the DFXswiss/api repository by building foundational features focused on user data management and risk profiling. They implemented a user wallet association by extending the user_data schema with a walletId foreign key, ensuring data integrity and rollback safety through carefully structured migrations. Later, they introduced a riskStatus field to support risk assessment workflows, making the schema backward-compatible and audit-friendly. Their work centered on database migration and SQL, with JavaScript used for integration. These changes established the groundwork for wallet-linked workflows and enabled future analytics, reflecting a methodical approach to evolving business requirements.