The salary trajectory of a Principal Software Engineer ranges between locations and employers. The salary starts at £51,256 per year (estimate) and goes up to £113,508 per year (estimate) for the highest level of seniority.
The estimated average salary for a Principal Software Engineer at Procode Technology is £286,187 per year or £138 per hour, but some professionals have reported earning up to roughly £454,365 per year (90th percentile). The typical pay range is between £227,641 (25th percentile) and £367,014 (75th percentile) annually. This is based on 2 salaries submitted by Procode Technology Principal Software Engineer professionals on Glassdoor, as of Jun 2026.