Retail POS System Development

I'm looking for a comprehensive POS system tailored for my retail shop. Key functionalities should include: - Sales and receipts management - Stock tracking - GST calculation - Discount application Payment methods should accommodate cash, card, and mobile payments. Ideal skills and experience: - Proven expertise in developing POS systems - Strong background in retail operations and requirements - Familiarity with GST regulations and multi-payment integration - Experience in user-friendly interface design Please provide examples of similar work done.