The estimated average salary for a Senior Process Development Engineer at Merck is ₹4,22,500 per year or ₹203 per hour, but some professionals have reported earning up to roughly ₹5,00,000 per year (90th percentile). The typical pay range is between ₹3,45,000 (25th percentile) and ₹5,00,000 (75th percentile) annually. This is based on 2 salaries submitted by Merck Senior Process Development Engineer professionals on Glassdoor, as of Jul 2026.