The table below provides summary statistics and contractor rates for jobs advertised in London requiring OC4J skills. It covers contract job vacancies from the 6 months leading up to 2 November 2025, with comparisons to the same periods in the previous two years.
OC4J 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
3,580
4,141
5,293
As % of all contract IT jobs advertised in London
26.34%
26.48%
25.99%
Number of daily rates quoted
2,430
2,718
4,009
10th Percentile
£363
£375
£400
25th Percentile
£425
£463
£475
Median daily rate (50th Percentile)
£540
£575
£600
Median % change year-on-year
-6.09%
-4.17%
-
75th Percentile
£675
£710
£706
90th Percentile
£788
£850
£810
England median daily rate
£510
£550
£550
% change year-on-year
-7.27%
-
-4.35%
Number of hourly rates quoted
30
19
34
10th Percentile
£31.52
£34.08
£35.00
25th Percentile
£34.67
£38.38
£40.20
Median hourly rate
£52.72
£49.50
£61.25
Median % change year-on-year
+6.51%
-19.18%
-5.77%
75th Percentile
£62.19
£61.97
£74.66
90th Percentile
£87.63
£76.00
£90.00
England median hourly rate
£55.00
£65.00
£55.00
% change year-on-year
-15.38%
+18.18%
-15.38%
OC4J Job Vacancy Trend in London
Historical trend showing the proportion of contract IT job postings citing OC4J relative to all contract IT jobs advertised in London.
OC4J Daily Rate Trend in London
Contractor daily rate distribution trend for jobs in London citing OC4J.
OC4J Hourly Rate Trend in London
Contractor hourly rate distribution trend for jobs in London citing OC4J.
OC4J Top 28 Co-Occurring Skills & Capabilities in London
For the 6 months to 2 November 2025, contractor job vacancies citing OC4J also mentioned the following skills and capabilities in order of popularity.
The figures indicate the absolute number of co-occurrences and as a proportion of all contract job ads across the London region with a requirement for OC4J.
OC4J Co-Occurring Skills & Capabilities in London by Category
The following tables expand on the one above by listing co-occurrences grouped by category. They cover the same employment type, locality and period, with up to 20 co-occurrences shown in each category:
