The estimated average salary for a Senior Process Development Engineer at STMicroelectronics is £54,885 per year or £26 per hour, but some professionals have reported earning up to roughly £85,420 per year (90th percentile). The typical pay range is between £44,026 (25th percentile) and £68,949 (75th percentile) annually. This is based on 1 salaries submitted by STMicroelectronics Senior Process Development Engineer professionals on Glassdoor, as of Jun 2026.