Period
to 19 November 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 19 November 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
19 Nov 2018
Same period 2017 Same period 2016
Rank 87 96 85
Rank change year-on-year +9 -11 -
Contract jobs citing API Development 15 9 8
As % of all contract IT jobs advertised in Hertfordshire 0.92% 0.58% 0.58%
As % of the Processes & Methodologies category 1.13% 0.71% 0.74%
Number of daily rates quoted 13 7 2
Hertfordshire median daily rate £388 £425 £325
Median daily rate % change year-on-year -8.82% +30.77% -
10th Percentile £332 £335 £313
90th Percentile £438 £500 £338
East of England median daily rate £390 £425 £450
% change year-on-year -8.24% -5.56% +12.50%
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 1,326 1,274 1,082
As % of all contract IT jobs advertised in Hertfordshire 81.75% 82.09% 78.35%
Number of daily rates quoted 807 644 620
Hertfordshire median daily rate £425 £400 £410
Median daily rate % change year-on-year +6.25% -2.44% +2.50%
10th Percentile £205 £204 £220
90th Percentile £569 £575 £538
East of England median daily rate £438 £425 £400
% change year-on-year +2.94% +6.25% -
Number of hourly rates quoted 80 71 59
Hertfordshire median hourly rate £17.71 £17.50 £25.00
Median hourly rate % change year-on-year +1.17% -30.00% +19.05%
10th Percentile £12.72 £13.00 £10.60
90th Percentile £48.30 £46.50 £53.75
East of England median hourly rate £17.71 £30.00 £31.00
% change year-on-year -40.98% -3.23% +31.91%

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
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 19 November 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
Hitchin - 4 £425 -
Watford -3 3 £350 -17.65%
Hemel Hempstead -4 1 £370 +5.71% 1
Welwyn Garden City - 1 - -
API Development
East of England

For the 6 months to 19 November 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 (53.33%) .NET
1 8 (53.33%) Agile Software Development
2 7 (46.67%) Web Services
3 6 (40.00%) Finance
3 6 (40.00%) REST
4 5 (33.33%) ASP.NET
4 5 (33.33%) SOAP
4 5 (33.33%) C#
4 5 (33.33%) .NET Framework
5 4 (26.67%) RESTful
5 4 (26.67%) Apache Cassandra
5 4 (26.67%) Microsoft
5 4 (26.67%) XQuery
5 4 (26.67%) CA
5 4 (26.67%) PostgreSQL
5 4 (26.67%) ASP.NET Web API
5 4 (26.67%) Virtual Machines
6 3 (20.00%) RequireJS
6 3 (20.00%) CQRS
6 3 (20.00%) MVC
6 3 (20.00%) CSS
6 3 (20.00%) XML
6 3 (20.00%) HTML
6 3 (20.00%) Java
6 3 (20.00%) JavaScript
6 3 (20.00%) Visual Studio
6 3 (20.00%) Entity Framework
6 3 (20.00%) ASP.NET MVC
6 3 (20.00%) LINQ
6 3 (20.00%) jQuery

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 (6.67%) Microsoft Excel
Cloud Services
1 2 (13.33%) SaaS
2 1 (6.67%) Amazon AWS
2 1 (6.67%) GitHub
2 1 (6.67%) Microsoft Azure
Database & Business Intelligence
1 4 (26.67%) Apache Cassandra
1 4 (26.67%) PostgreSQL
2 2 (13.33%) Big Data
2 2 (13.33%) SQL Server
3 1 (6.67%) Data Warehouse
3 1 (6.67%) dBASE
3 1 (6.67%) Relational Database
3 1 (6.67%) SQL Server 2008
3 1 (6.67%) SQL Server 2012
3 1 (6.67%) SQL Server 2016
3 1 (6.67%) SQL Server Analysis Services
3 1 (6.67%) SQL Server Integration Services
3 1 (6.67%) SQL Server Reporting Services
Development Applications
1 3 (20.00%) Visual Studio
2 1 (6.67%) Octopus Deploy
General
1 6 (40.00%) Finance
2 1 (6.67%) French Language
2 1 (6.67%) German Language
2 1 (6.67%) Retail
2 1 (6.67%) Spanish Language
2 1 (6.67%) Swedish Language
Job Titles
1 14 (93.33%) Developer
2 7 (46.67%) .NET Developer
3 4 (26.67%) Senior Developer
4 2 (13.33%) Angular Developer
4 2 (13.33%) C# .NET Developer
4 2 (13.33%) C# Developer
4 2 (13.33%) Full Stack Developer
4 2 (13.33%) Java Developer
5 1 (6.67%) Architect
5 1 (6.67%) ASP.NET Developer
5 1 (6.67%) ASP.NET MVC Developer
5 1 (6.67%) AWS Architect
5 1 (6.67%) C# ASP.NET Developer
5 1 (6.67%) ETL Developer
5 1 (6.67%) SaaS Architect
5 1 (6.67%) Solutions Architect
5 1 (6.67%) SQL Developer
5 1 (6.67%) T-SQL Developer
5 1 (6.67%) VB.NET Developer
5 1 (6.67%) Web Architect
Libraries, Frameworks & Software Standards
1 8 (53.33%) .NET
2 7 (46.67%) Web Services
3 6 (40.00%) REST
4 5 (33.33%) .NET Framework
4 5 (33.33%) ASP.NET
4 5 (33.33%) SOAP
5 4 (26.67%) ASP.NET Web API
5 4 (26.67%) RESTful
6 3 (20.00%) Ajax
6 3 (20.00%) ASP.NET MVC
6 3 (20.00%) CSS
6 3 (20.00%) Entity Framework
6 3 (20.00%) HTML
6 3 (20.00%) jQuery
6 3 (20.00%) LINQ
6 3 (20.00%) RequireJS
6 3 (20.00%) XML
7 2 (13.33%) AngularJS
7 2 (13.33%) React
8 1 (6.67%) KnockoutJS
Miscellaneous
1 2 (13.33%) Computer Science
1 2 (13.33%) Greenfield Project
2 1 (6.67%) Analytical Skills
2 1 (6.67%) Management Information System
2 1 (6.67%) Public Cloud
Operating Systems
1 1 (6.67%) Windows
Processes & Methodologies
1 8 (53.33%) Agile Software Development
2 3 (20.00%) CQRS
2 3 (20.00%) MVC
3 2 (13.33%) DevOps
3 2 (13.33%) SDLC
4 1 (6.67%) Competitor Analysis
4 1 (6.67%) Creative Problem-Solving
4 1 (6.67%) Data Analysis
4 1 (6.67%) Data Cleansing
4 1 (6.67%) Data Integration
4 1 (6.67%) Data Migration
4 1 (6.67%) Data-Driven Decision Making
4 1 (6.67%) Decision-Making
4 1 (6.67%) ETL
4 1 (6.67%) ETL Development
4 1 (6.67%) Market Research
4 1 (6.67%) Migration
4 1 (6.67%) Problem-Solving
4 1 (6.67%) Project Management
4 1 (6.67%) Time Management
Programming Languages
1 5 (33.33%) C#
2 4 (26.67%) XQuery
3 3 (20.00%) Java
3 3 (20.00%) JavaScript
4 2 (13.33%) SQL
5 1 (6.67%) FoxPro (VFP)
5 1 (6.67%) T-SQL
5 1 (6.67%) VB.NET
Qualifications
1 2 (13.33%) Degree
Quality Assurance & Compliance
1 1 (6.67%) PCI DSS
System Software
1 4 (26.67%) Virtual Machines
Vendors
1 4 (26.67%) CA
1 4 (26.67%) Microsoft
2 1 (6.67%) SAP