The salary trajectory of a a Senior .NET Developer ranges between locations and employers. The salary starts at £32,698 per year (estimate) and goes up to £56,343 per year (estimate) for the highest level of seniority.
The estimated average salary for a Senior .NET Developer at 99x is £63,961 per year or £31 per hour, but some professionals have reported earning up to roughly £94,721 per year (90th percentile). The typical pay range is between £53,219 (25th percentile) and £77,979 (75th percentile) annually. This is based on 1 salaries submitted by 99x Senior .NET Developer professionals on Glassdoor, as of Jun 2026.