Java Native Interface (JNI)
London > Central London
The table below provides summary statistics for contract job vacancies advertised in Central London requiring JNI skills. It includes a benchmarking guide to the contractor rates offered in vacancies that cited JNI over the 6 months leading up to 5 July 2025, comparing them to the same period in the previous two years.
| 6 months to 5 Jul 2025 |
Same period 2024 | Same period 2023 | |
|---|---|---|---|
| Rank | - | - | 174 |
| Rank change year-on-year | - | - | +32 |
| Contract jobs citing JNI | 0 | 0 | 3 |
| As % of all contract jobs advertised in Central London | - | - | 0.080% |
| As % of the Libraries, Frameworks & Software Standards category | - | - | 0.30% |
| Number of daily rates quoted | 0 | 0 | 3 |
| 10th Percentile | - | - | - |
| 25th Percentile | - | - | £625 |
| Median daily rate (50th Percentile) | - | - | £650 |
| Median % change year-on-year | - | - | +36.84% |
| 75th Percentile | - | - | £675 |
| 90th Percentile | - | - | - |
| London median daily rate | - | - | £750 |
| % change year-on-year | - | - | +46.34% |
All Software Libraries and Frameworks
Central London
JNI 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 Central London.
| Contract vacancies with a requirement for technical specification, industry standards, software libraries and framework skills | 503 | 571 | 984 |
| As % of all contract IT jobs advertised in Central London | 25.02% | 24.05% | 26.11% |
| Number of daily rates quoted | 335 | 396 | 630 |
| 10th Percentile | £402 | £413 | £425 |
| 25th Percentile | £433 | £475 | £500 |
| Median daily rate (50th Percentile) | £550 | £565 | £625 |
| Median % change year-on-year | -2.65% | -9.60% | +4.17% |
| 75th Percentile | £675 | £706 | £738 |
| 90th Percentile | £756 | £809 | £838 |
| London median daily rate | £550 | £575 | £600 |
| % change year-on-year | -4.35% | -4.17% | - |
| Number of hourly rates quoted | 3 | 0 | 1 |
| 10th Percentile | £52.83 | - | - |
| 25th Percentile | £55.99 | - | - |
| Median hourly rate | £62.50 | - | £53.00 |
| Median % change year-on-year | - | - | +11.58% |
| 75th Percentile | £76.25 | - | - |
| 90th Percentile | £83.75 | - | - |
| London median hourly rate | £48.22 | £42.50 | £67.25 |
| % change year-on-year | +13.46% | -36.80% | +37.97% |
JNI
Job Vacancy Trend in Central London
Job postings citing JNI as a proportion of all IT jobs advertised in Central London.
JNI
Contractor Daily Rate Trend in Central London
3-month moving average daily rate quoted in jobs citing JNI in Central London.