The table below provides summary statistics for contract job vacancies advertised in London requiring JSON Schema skills. It includes a benchmarking guide to the contractor rates offered in vacancies that cited JSON Schema over the 6 months leading up to 18 July 2025, comparing them to the same period in the previous two years.
JSON Schema 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
3,532
4,633
6,627
As % of all contract IT jobs advertised in London
26.04%
26.99%
26.26%
Number of daily rates quoted
2,455
3,379
4,977
10th Percentile
£375
£375
£406
25th Percentile
£430
£461
£488
Median daily rate (50th Percentile)
£550
£575
£600
Median % change year-on-year
-4.35%
-4.17%
-
75th Percentile
£700
£725
£725
90th Percentile
£825
£850
£811
England median daily rate
£520
£550
£550
% change year-on-year
-5.45%
-
-4.35%
Number of hourly rates quoted
24
26
41
10th Percentile
£31.50
£16.25
£30.75
25th Percentile
£33.25
£23.80
£46.25
Median hourly rate
£48.22
£40.00
£67.50
Median % change year-on-year
+20.55%
-40.74%
+35.00%
75th Percentile
£62.81
£58.76
£75.00
90th Percentile
£81.88
£71.00
£86.56
England median hourly rate
£60.00
£58.00
£63.50
% change year-on-year
+3.45%
-8.66%
+15.45%
JSON Schema Job Vacancy Trend in London
Job postings citing JSON Schema as a proportion of all IT jobs advertised in London.
JSON Schema Contractor Daily Rate Trend in London
3-month moving average daily rate quoted in jobs citing JSON Schema in London.
JSON Schema Top 10 Co-occurring Skills and Capabilities in London
For the 6 months to 18 July 2025, contractor job vacancies citing JSON Schema also mentioned the following skills and capabilities in order of popularity.
The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the London region with a requirement for JSON Schema.
JSON Schema Co-occurring Skills and Capabilities in London by Category
The follow tables expand on the table above by listing co-occurrences grouped by category.
The same employment type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:
