Hello,
As per you description it looks you need to develop senior shopify developer for long term commitment.
Speaking about myself I'm a senior Shopify developer with over 4+years of experience in the same. I've had designed and developed numerous Shopify websites and e-comm stores till date.
With a full time availability and ready for long term commitment, I'm able to start immediately.
Please connect at your convenience to discuss the project in detail.
Awaiting your positive reply.
Best regards,
Rohan