Chai Assertion Library (Chai.js)
England > London
The table below provides summary statistics and contractor rates for jobs advertised in London requiring Chai skills. It covers contract job vacancies from the 6 months leading up to 15 December 2025, with comparisons to the same periods in the previous two years.
| 6 months to 15 Dec 2025 |
Same period 2024 | Same period 2023 | |
|---|---|---|---|
| Rank | - | - | 400 |
| Rank change year-on-year | - | - | +150 |
| Contract jobs citing Chai | 0 | 0 | 5 |
| As % of all contract jobs in London | - | - | 0.026% |
| As % of the Libraries, Frameworks & Software Standards category | - | - | 0.10% |
| Number of daily rates quoted | 0 | 0 | 4 |
| 10th Percentile | - | - | £481 |
| 25th Percentile | - | - | £541 |
| Median daily rate (50th Percentile) | - | - | £613 |
| Median % change year-on-year | - | - | +39.20% |
| 75th Percentile | - | - | £713 |
| 90th Percentile | - | - | £825 |
| England median daily rate | - | - | £613 |
| % change year-on-year | - | - | +6.52% |
All Software Libraries and Frameworks
London
Chai falls under the Software Libraries and Frameworks category. For comparison with the information above, the following table provides summary statistics for all contract job vacancies requiring technical specification, industry standards, software libraries and framework skills in London.
| Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills | 3,728 | 3,886 | 4,942 |
| As % of all contract IT jobs advertised in London | 26.16% | 25.64% | 25.93% |
| Number of daily rates quoted | 2,520 | 2,536 | 3,734 |
| 10th Percentile | £359 | £379 | £400 |
| 25th Percentile | £425 | £463 | £475 |
| Median daily rate (50th Percentile) | £525 | £575 | £588 |
| Median % change year-on-year | -8.70% | -2.13% | -2.08% |
| 75th Percentile | £663 | £705 | £700 |
| 90th Percentile | £775 | £838 | £800 |
| England median daily rate | £513 | £550 | £550 |
| % change year-on-year | -6.82% | - | -4.35% |
| Number of hourly rates quoted | 27 | 20 | 30 |
| 10th Percentile | £33.79 | £34.83 | £31.77 |
| 25th Percentile | £43.13 | £37.88 | £36.40 |
| Median hourly rate | £55.00 | £48.75 | £53.75 |
| Median % change year-on-year | +12.82% | -9.30% | -13.65% |
| 75th Percentile | £63.38 | £63.13 | £71.50 |
| 90th Percentile | £70.80 | £71.90 | £78.75 |
| England median hourly rate | £61.00 | £62.50 | £52.20 |
| % change year-on-year | -2.40% | +19.74% | -19.70% |
Chai
Job Vacancy Trend in London
Historical trend showing the proportion of contract IT job postings citing Chai relative to all contract IT jobs advertised in London.
Chai
Daily Rate Trend in London
Contractor daily rate distribution trend for jobs in London citing Chai.
