Portable Operating System Interface (POSIX)
UK > England
The table below provides summary statistics and salary benchmarking for jobs advertised in England requiring POSIX skills. It covers permanent job vacancies from the 6 months leading up to 30 December 2025, with comparisons to the same periods in the previous two years.
| 6 months to 30 Dec 2025 |
Same period 2024 | Same period 2023 | |
|---|---|---|---|
| Rank | - | 672 | 658 |
| Rank change year-on-year | - | -14 | +316 |
| Permanent jobs citing POSIX | 0 | 3 | 9 |
| As % of all permanent jobs in England | - | 0.006% | 0.020% |
| As % of the Libraries, Frameworks & Software Standards category | - | 0.028% | 0.079% |
| Number of salaries quoted | 0 | 0 | 8 |
| 10th Percentile | - | - | £39,250 |
| 25th Percentile | - | - | £45,250 |
| Median annual salary (50th Percentile) | - | - | £50,000 |
| 75th Percentile | - | - | £51,438 |
| 90th Percentile | - | - | £58,000 |
| UK median annual salary | - | - | £50,000 |
All Software Libraries and Frameworks
England
POSIX falls under the Software Libraries and Frameworks category. For comparison with the information above, the following table provides summary statistics for all permanent job vacancies requiring technical specification, industry standards, software libraries and framework skills in England.
| Permanent vacancies with a requirement for technical specification, industry standards, software libraries and framework skills | 6,238 | 10,701 | 11,379 |
| As % of all permanent jobs advertised in England | 11.97% | 21.58% | 25.02% |
| Number of salaries quoted | 4,806 | 6,365 | 9,536 |
| 10th Percentile | £35,854 | £40,000 | £41,250 |
| 25th Percentile | £50,000 | £50,000 | £51,250 |
| Median annual salary (50th Percentile) | £65,000 | £65,000 | £65,000 |
| Median % change year-on-year | - | - | -3.70% |
| 75th Percentile | £85,000 | £86,250 | £86,250 |
| 90th Percentile | £112,500 | £110,000 | £110,000 |
| UK median annual salary | £65,000 | £65,000 | £65,000 |
| % change year-on-year | - | - | -3.70% |
POSIX
Job Vacancy Trend in England
Historical trend showing the proportion of permanent IT job postings citing POSIX relative to all permanent IT jobs advertised in England.
POSIX
Salary Trend in England
Salary distribution trend for jobs in England citing POSIX.
