Chai Assertion Library (Chai.js)
UK > UK excluding London
The table below provides summary statistics and salary benchmarking for jobs advertised in the UK excluding London requiring Chai skills. It covers permanent job vacancies from the 6 months leading up to 25 December 2025, with comparisons to the same periods in the previous two years.
| 6 months to 25 Dec 2025 |
Same period 2024 | Same period 2023 | |
|---|---|---|---|
| Rank | - | 580 | 543 |
| Rank change year-on-year | - | -37 | +240 |
| Permanent jobs citing Chai | 0 | 2 | 8 |
| As % of all permanent jobs in the UK excluding London | - | 0.005% | 0.027% |
| As % of the Libraries, Frameworks & Software Standards category | - | 0.027% | 0.11% |
| Number of salaries quoted | 0 | 1 | 7 |
| 10th Percentile | - | - | £45,750 |
| 25th Percentile | - | £62,500 | £51,250 |
| Median annual salary (50th Percentile) | - | £65,000 | £57,500 |
| Median % change year-on-year | - | +13.04% | +4.55% |
| 75th Percentile | - | £67,500 | £63,750 |
| 90th Percentile | - | - | £67,500 |
| UK median annual salary | - | £87,500 | £70,000 |
| % change year-on-year | - | +25.00% | +27.27% |
All Software Libraries and Frameworks
UK excluding London
Chai 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 the UK excluding London.
| Permanent vacancies with a requirement for technical specification, industry standards, software libraries and framework skills | 3,875 | 7,349 | 7,067 |
| As % of all permanent jobs advertised in the UK excluding London | 9.12% | 19.37% | 23.82% |
| Number of salaries quoted | 2,967 | 4,187 | 5,460 |
| 10th Percentile | £28,250 | £35,000 | £37,485 |
| 25th Percentile | £42,500 | £45,000 | £45,000 |
| Median annual salary (50th Percentile) | £57,500 | £57,500 | £57,500 |
| 75th Percentile | £72,500 | £72,500 | £72,500 |
| 90th Percentile | £82,500 | £83,750 | £85,000 |
| UK median annual salary | £65,000 | £65,000 | £65,000 |
| % change year-on-year | - | - | -2.99% |
Chai
Job Vacancy Trend in the UK excluding London
Historical trend showing the proportion of permanent IT job postings citing Chai relative to all permanent IT jobs advertised in the UK excluding London.
Chai
Salary Trend in the UK excluding London
Salary distribution trend for jobs in the UK excluding London citing Chai.
