O2 employees working as a Senior Software Engineer in United Kingdom have attributed a compensation and benefits rating of 4.1 out of 5 stars, based on 2 ratings. This is in line with the average of Senior Software Engineer professionals at O2 worldwide.
The salary trajectory of a a Senior Software Engineer ranges between locations and employers. The salary starts at £54,766 per year (estimate) and goes up to £113,665 per year (estimate) for the highest level of seniority.
The estimated average salary for a Senior Software Engineer at O2 is £75,660 per year or £36 per hour, but some professionals have reported earning up to roughly £140,755 per year (90th percentile). The typical pay range is between £57,790 (25th percentile) and £102,489 (75th percentile) annually. This is based on 5 salaries submitted by O2 Senior Software Engineer professionals on Glassdoor, as of Jul 2026.