A typical hourly rate for an experienced DynamoDB developer is generally between $70 and $150 per hour. That said, the final cost can vary based on several factors. A developer who has built complex data models and data pipelines, worked on large DynamoDB clusters in production tuning query performance will charge you more.
The level of complexity and scope of project would also determine how much you need to pay per hour. If the specific role needed skills related to, for example – data security or integration with certain AWS services, you may pay many folds of what an entry-level DynamoDB dev would command.