Java Billing Software Development

I'm seeking an experienced Java developer to create billing software specifically for retail stores. The primary function of this software will be to generate invoices.

Key Requirements:
- The software must include customizable templates for invoice generation.

Ideal Skills and Experience:
- Proficiency in Java development.
- Experience in building billing or invoicing software.
- Familiarity with customizable template integration.
- Background in retail software solutions is a plus.

Please provide examples of similar work done and an estimated timeline for project completion.