Period
to 18 July 2018

The following table provides summary statistics for contract job vacancies advertised in Hertfordshire with a requirement for API Development skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited API Development over the 6 months to 18 July 2018 with a comparison to the same period in the previous 2 years.

Note that daily and hourly rates are treated separately in these statistics. When calculating contractor rate percentiles, daily rates are never derived from quoted hourly rates or vice versa.

API Development
East of England > Hertfordshire
6 months to
18 Jul 2018
Same period 2017 Same period 2016
Rank 89 82 82
Rank change year-on-year -7 0 -
Contract jobs citing API Development 11 11 8
As % of all contract IT jobs advertised in Hertfordshire 0.70% 0.87% 0.57%
As % of the Processes & Methodologies category 0.87% 1.08% 0.72%
Number of daily rates quoted 13 10 2
Hertfordshire median daily rate £388 £450 £298
Median daily rate % change year-on-year -13.89% +51.26% -
10th Percentile £337 £414 £274
90th Percentile £488 £514 £331
East of England median daily rate £425 £475 £388
% change year-on-year -10.53% +22.58% -8.82%
Number of hourly rates quoted 0 0 0
Hertfordshire median hourly rate - - -
East of England median hourly rate - - -

API Development is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Hertfordshire with a requirement for process or methodology skills.

All Process and Methodology Skills
Hertfordshire
Contract vacancies with a requirement for process or methodology skills 1,270 1,016 1,109
As % of all contract IT jobs advertised in Hertfordshire 81.36% 80.70% 79.21%
Number of daily rates quoted 719 520 597
Hertfordshire median daily rate £400 £413 £400
Median daily rate % change year-on-year -3.03% +3.13% +3.23%
10th Percentile £208 £213 £250
90th Percentile £569 £588 £550
East of England median daily rate £436 £425 £413
% change year-on-year +2.65% +3.03% +6.45%
Number of hourly rates quoted 91 66 47
Hertfordshire median hourly rate £17.32 £24.13 £30.00
Median hourly rate % change year-on-year -28.21% -19.58% +43.30%
10th Percentile £11.07 £11.35 £9.23
90th Percentile £46.25 £52.50 £53.00
East of England median hourly rate £17.50 £31.00 £23.00
% change year-on-year -43.55% +34.78% +2.22%

API Development
Job Vacancy Trend in Hertfordshire

Job postings citing API Development as a percentage of all IT jobs advertised in Hertfordshire.

Job vacancy trend for API Development in Hertfordshire

API Development
Contractor Daily Rate Trend in Hertfordshire

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing API Development in Hertfordshire.

Contractor daily rate trend for API Development in Hertfordshire

API Development
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing API Development in Hertfordshire over the 6 months to 18 July 2018.

Contractor daily rate histogram for API Development in Hertfordshire

API Development
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing API Development within the Hertfordshire region over the 6 months to 18 July 2018. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Watford -7 2 £475 -5.00%
Rickmansworth - 2 £338 -
Welwyn Garden City -12 1 - -
Hemel Hempstead - 1 £370 - 2
API Development
East of England

For the 6 months to 18 July 2018, IT contractor jobs citing API Development also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all contract job ads across the Hertfordshire region with a requirement for API Development.

1 8 (72.73%) RESTful
2 7 (63.64%) .NET
3 6 (54.55%) PostgreSQL
3 6 (54.55%) Apache Cassandra
4 5 (45.45%) CQRS
4 5 (45.45%) Capita
5 4 (36.36%) ASP.NET Web API
5 4 (36.36%) SQL Server
5 4 (36.36%) Java
6 3 (27.27%) JavaScript
6 3 (27.27%) C#
6 3 (27.27%) HTML
6 3 (27.27%) ASP.NET
6 3 (27.27%) CSS
6 3 (27.27%) DevOps
6 3 (27.27%) Entity Framework
6 3 (27.27%) .NET Framework
6 3 (27.27%) jQuery
7 2 (18.18%) PCI DSS
7 2 (18.18%) Git (software)
7 2 (18.18%) Team Foundation Server
7 2 (18.18%) Web Development
7 2 (18.18%) AngularJS
7 2 (18.18%) Web Services
7 2 (18.18%) SQL
7 2 (18.18%) Agile Software Development
7 2 (18.18%) Scrum
7 2 (18.18%) Microsoft
7 2 (18.18%) Angular 2
7 2 (18.18%) Greenfield Project

API Development
Co-occurring IT Skills in Hertfordshire by Category

The follow tables expand on the table above by listing co-occurrences grouped by category. The same job type, locality and period is covered with up to 20 co-occurrences shown in each of the following categories:

Applications
1 1 (9.09%) Microsoft Excel
Cloud Services
1 1 (9.09%) GitHub
1 1 (9.09%) SaaS
Database & Business Intelligence
1 6 (54.55%) Apache Cassandra
1 6 (54.55%) PostgreSQL
2 4 (36.36%) SQL Server
3 1 (9.09%) Data Warehouse
3 1 (9.09%) dBASE
3 1 (9.09%) Relational Database
3 1 (9.09%) SQL Server 2008
3 1 (9.09%) SQL Server 2012
3 1 (9.09%) SQL Server 2016
3 1 (9.09%) SQL Server Analysis Services
3 1 (9.09%) SQL Server Integration Services
3 1 (9.09%) SQL Server Reporting Services
Development Applications
1 2 (18.18%) Git (software)
1 2 (18.18%) Team Foundation Server
2 1 (9.09%) Octopus Deploy
2 1 (9.09%) Visual Studio
Job Titles
1 11 (100.00%) Developer
2 6 (54.55%) .NET Developer
3 3 (27.27%) Java Developer
4 2 (18.18%) Angular Developer
5 1 (9.09%) ASP.NET Developer
5 1 (9.09%) ASP.NET MVC Developer
5 1 (9.09%) C# .NET Developer
5 1 (9.09%) C# ASP.NET Developer
5 1 (9.09%) C# Developer
5 1 (9.09%) ETL Developer
5 1 (9.09%) Salesforce Developer
5 1 (9.09%) SQL Developer
5 1 (9.09%) T-SQL Developer
5 1 (9.09%) UI Developer
5 1 (9.09%) VB.NET Developer
Libraries, Frameworks & Software Standards
1 8 (72.73%) RESTful
2 7 (63.64%) .NET
3 4 (36.36%) ASP.NET Web API
4 3 (27.27%) .NET Framework
4 3 (27.27%) ASP.NET
4 3 (27.27%) CSS
4 3 (27.27%) Entity Framework
4 3 (27.27%) HTML
4 3 (27.27%) jQuery
5 2 (18.18%) Angular 2
5 2 (18.18%) AngularJS
5 2 (18.18%) Web Services
6 1 (9.09%) Ajax
6 1 (9.09%) KnockoutJS
6 1 (9.09%) LINQ
6 1 (9.09%) LINQ to SQL
6 1 (9.09%) RequireJS
6 1 (9.09%) REST
6 1 (9.09%) WCF
6 1 (9.09%) XML
Miscellaneous
1 2 (18.18%) Greenfield Project
2 1 (9.09%) Computer Science
2 1 (9.09%) Learning Management System
2 1 (9.09%) Management Information System
Operating Systems
1 1 (9.09%) Windows
Processes & Methodologies
1 5 (45.45%) CQRS
2 3 (27.27%) DevOps
3 2 (18.18%) Agile Software Development
3 2 (18.18%) Scrum
3 2 (18.18%) Web Development
4 1 (9.09%) Data Cleansing
4 1 (9.09%) Data Integration
4 1 (9.09%) Data Migration
4 1 (9.09%) ETL
4 1 (9.09%) ETL Development
4 1 (9.09%) Migration
4 1 (9.09%) MVC
4 1 (9.09%) Time Management
Programming Languages
1 4 (36.36%) Java
2 3 (27.27%) C#
2 3 (27.27%) JavaScript
3 2 (18.18%) SQL
4 1 (9.09%) FoxPro (VFP)
4 1 (9.09%) T-SQL
4 1 (9.09%) VB.NET
Qualifications
1 1 (9.09%) Degree
Quality Assurance & Compliance
1 2 (18.18%) PCI DSS
Vendors
1 5 (45.45%) Capita
2 2 (18.18%) Microsoft
3 1 (9.09%) Salesforce.com
3 1 (9.09%) SAP