The estimated average salary for a Software Development Engineer In Test (SDET) II at Infosys is £63,984 per year or £31 per hour, but some professionals have reported earning up to roughly £108,027 per year (90th percentile). The typical pay range is between £51,170 (25th percentile) and £82,602 (75th percentile) annually. This is based on 2 salaries submitted by Infosys Software Development Engineer In Test (SDET) II professionals on Glassdoor, as of Jun 2026.