Case-Sensitive Text Captcha

I’m ready to add a simple, effective defence against bots on my site and need a developer to build a custom, case-sensitive text captcha. The challenge text should be visually protected by smooth wavy-line distortion so humans can still read it at a glance while automated scripts struggle... (Budget: ₹750 - ₹1250 INR, Jobs: Frontend Development, HTML, Image Processing, JavaScript, PHP, Python, Security, Web Development)