The following table provides summary statistics for contract job vacancies advertised in Hertfordshire with a requirement for TDD skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited TDD over the 3 months to 28 June 2017 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.

Test-Driven Development (TDD)
East of England / Hertfordshire
3 months to
28 Jun 2017
Same period 2016 Same period 2015
Rank 33 36 48
Rank change year-on-year +3 +12  
Contract jobs citing TDD 29 24 26
As % of all contract IT jobs advertised in Hertfordshire 4.55% 3.61% 2.95%
As % of the Processes & Methodologies category 5.71% 4.60% 3.74%
Number of daily rates quoted 21 20 13
Median daily rate £525 £463 £500
Median daily rate % change year-on-year +13.51% -7.50%  
UK excluding London median daily rate £420 £413 £375
% change year-on-year +1.81% +10.00%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate £41.50 £40.00 £43.75
% change year-on-year +3.75% -8.57%  

TDD is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in Hertfordshire with a requirement for process and methodology skills.

Contract Process & Methodology Skills
Hertfordshire
Contract job vacancies with a requirement for process and methodology skills 508 522 696
As % of all contract IT job vacancies advertised in Hertfordshire 79.75% 78.61% 79.09%
Number of daily rates quoted 250 281 357
Median daily rate £425 £425 £377
Median daily rate % change year-on-year - +12.62%  
90% offered a daily rate of more than £263 £288 £295
10% offered a daily rate of more than £550 £500 £500
UK excluding London median daily rate £415 £400 £385
% change year-on-year +3.75% +3.89%  
Number of hourly rates quoted 33 17 60
Median hourly rate £17.50 £25.00 £32.50
Median hourly rate % change year-on-year -30.02% -23.07%  
90% offered a hourly rate of more than £11.98 £15.00 £10.50
10% offered a hourly rate of more than £45.00 £52.50 £47.50
UK excluding London median hourly rate £34.75 £28.50 £30.00
% change year-on-year +21.92% -5.00%  

TDD
Job Vacancy Trend in Hertfordshire

The job posting trend of jobs advertised in Hertfordshire citing TDD as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for TDD in Hertfordshire

TDD
Contractor Daily Rate Trend in Hertfordshire

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

Contractor daily rate trend for TDD in Hertfordshire

TDD
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing TDD in Hertfordshire over the 3 months to 28 June 2017.

Contractor daily rate histogram for TDD in Hertfordshire

TDD
Contractor Hourly Rate Trend in Hertfordshire

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing TDD in Hertfordshire.

Contractor hourly rate trend for TDD in Hertfordshire

TDD
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 TDD within the Hertfordshire region over the 3 months to 28 June 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Hatfield - 9 £538 - 1
Watford -1 6 £450 - 5
Welwyn Garden City +5 2 £500 +16.27%
Hemel Hempstead - 1 £360 - 2
TDD
East of England

For the 6 months to 28 June 2017, IT contractor jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Hertfordshire region with a requirement for TDD.

1 78 (90.70%) Agile Software Development
2 64 (74.42%) Java
3 44 (51.16%) BDD
4 31 (36.05%) Scrum
5 26 (30.23%) DevOps
6 24 (27.91%) E-Commerce
7 23 (26.74%) Spring
8 20 (23.26%) OO
8 20 (23.26%) Microservices
9 17 (19.77%) Git (software)
10 16 (18.60%) JavaScript
10 16 (18.60%) JIRA
11 15 (17.44%) Open Source
12 14 (16.28%) Amazon AWS
12 14 (16.28%) NoSQL
12 14 (16.28%) RxJava
13 13 (15.12%) JSON
13 13 (15.12%) Continuous Integration
13 13 (15.12%) HTML
13 13 (15.12%) CSS
14 12 (13.95%) Linux
14 12 (13.95%) Unix
14 12 (13.95%) AngularJS
14 12 (13.95%) Jenkins
14 12 (13.95%) REST
15 11 (12.79%) Puppet
15 11 (12.79%) RESTful
15 11 (12.79%) Opscode Chef
15 11 (12.79%) XML
15 11 (12.79%) Retail

TDD
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:

Application Platforms
1 5 (5.81%) Confluence
2 3 (3.49%) CMS
2 3 (3.49%) Magnolia
2 3 (3.49%) Tomcat
3 2 (2.33%) Apache
3 2 (2.33%) Apache Solr
3 2 (2.33%) Elasticsearch
3 2 (2.33%) IIS
3 2 (2.33%) MQSeries
4 1 (1.16%) Apache Spark
4 1 (1.16%) nginx
Applications
1 3 (3.49%) Photoshop
Cloud Services
1 14 (16.28%) Amazon AWS
2 2 (2.33%) Amazon EC2
2 2 (2.33%) Amazon S3
2 2 (2.33%) Amazon SQS
2 2 (2.33%) Microsoft Azure
2 2 (2.33%) PaaS
3 1 (1.16%) AWS CloudFormation
3 1 (1.16%) AWS Lambda
Communications & Networking
1 2 (2.33%) Internet
2 1 (1.16%) HTTP
2 1 (1.16%) TCP/IP
Database & Business Intelligence
1 14 (16.28%) NoSQL
2 9 (10.47%) Apache Cassandra
2 9 (10.47%) SQL Server
3 8 (9.30%) Big Data
4 4 (4.65%) MySQL
4 4 (4.65%) SQL Server 2014
5 2 (2.33%) Azure SQL Database
5 2 (2.33%) Couchbase
5 2 (2.33%) Hadoop
5 2 (2.33%) MongoDB
6 1 (1.16%) Amazon DynamoDB
6 1 (1.16%) Apache Hive
6 1 (1.16%) Data Warehouse
6 1 (1.16%) HBase
6 1 (1.16%) Redis
6 1 (1.16%) SQL Server 2012
Development Applications
1 17 (19.77%) Git (software)
2 16 (18.60%) JIRA
3 12 (13.95%) Jenkins
4 8 (9.30%) Maven
5 7 (8.14%) Cucumber
5 7 (8.14%) Selenium
6 5 (5.81%) Gradle
6 5 (5.81%) Grunt
6 5 (5.81%) gulp
7 4 (4.65%) Ant
8 3 (3.49%) Atlassian Bamboo
8 3 (3.49%) JUnit
8 3 (3.49%) Mockito
8 3 (3.49%) Moq
8 3 (3.49%) Team Foundation Server
8 3 (3.49%) WebDriver
9 2 (2.33%) FxCop
9 2 (2.33%) JBehave
9 2 (2.33%) StyleCop
9 2 (2.33%) Visual Studio Team System
General
1 11 (12.79%) Retail
2 4 (4.65%) Finance
3 3 (3.49%) Games
4 1 (1.16%) Legal
4 1 (1.16%) Publishing
Job Titles
1 68 (79.07%) Developer
2 51 (59.30%) Java Developer
3 29 (33.72%) AWS Developer
4 23 (26.74%) Senior Developer
4 23 (26.74%) Senior Java Developer
5 17 (19.77%) Agile Developer
5 17 (19.77%) Agile Java Developer
6 10 (11.63%) Senior Agile Developer
6 10 (11.63%) Senior Agile Java Developer
7 7 (8.14%) .NET Developer
8 6 (6.98%) C# Developer
8 6 (6.98%) Test Manager
9 5 (5.81%) ASP.NET Developer
9 5 (5.81%) AWS DevOps
9 5 (5.81%) DevOps Developer
9 5 (5.81%) JavaScript Developer
10 4 (4.65%) C# .NET Developer
10 4 (4.65%) Front End Developer (Client-Side Developer)
10 4 (4.65%) Portfolio Manager
10 4 (4.65%) Portfolio Test Manager
Libraries, Frameworks & Software Standards
1 23 (26.74%) Spring
2 14 (16.28%) RxJava
3 13 (15.12%) CSS
3 13 (15.12%) HTML
3 13 (15.12%) JSON
4 12 (13.95%) AngularJS
4 12 (13.95%) REST
5 11 (12.79%) RESTful
5 11 (12.79%) XML
6 9 (10.47%) .NET
6 9 (10.47%) ASP.NET Web API
6 9 (10.47%) HTML5
6 9 (10.47%) Web Services
7 8 (9.30%) ASP.NET
8 7 (8.14%) CSS3
8 7 (8.14%) Hibernate
8 7 (8.14%) Node.js
8 7 (8.14%) React
9 6 (6.98%) jQuery
10 5 (5.81%) .NET Framework
Miscellaneous
1 7 (8.14%) Client/Server
2 6 (6.98%) Greenfield Project
3 4 (4.65%) Data Structures
3 4 (4.65%) iPad
3 4 (4.65%) User Experience
4 3 (3.49%) Algorithms
4 3 (3.49%) W3C
5 2 (2.33%) Tandem
6 1 (1.16%) Analytical Skills
6 1 (1.16%) Mobile App
Operating Systems
1 12 (13.95%) Linux
1 12 (13.95%) Unix
2 2 (2.33%) HPUX
2 2 (2.33%) Solaris
3 1 (1.16%) Android
Processes & Methodologies
1 78 (90.70%) Agile Software Development
2 44 (51.16%) BDD
3 31 (36.05%) Scrum
4 26 (30.23%) DevOps
5 24 (27.91%) E-Commerce
6 20 (23.26%) Microservices
6 20 (23.26%) OO
7 15 (17.44%) Open Source
8 13 (15.12%) Continuous Integration
9 9 (10.47%) Continuous Delivery
9 9 (10.47%) Mentoring
9 9 (10.47%) Service Design
10 8 (9.30%) Kanban
10 8 (9.30%) MVC
10 8 (9.30%) Refactoring
10 8 (9.30%) Test Automation
11 7 (8.14%) ATDD
11 7 (8.14%) SOLID
11 7 (8.14%) Test Strategy
11 7 (8.14%) Unit Testing
Programming Languages
1 64 (74.42%) Java
2 16 (18.60%) JavaScript
3 10 (11.63%) Groovy
4 9 (10.47%) SQL
5 7 (8.14%) C#
6 6 (6.98%) Scala
7 5 (5.81%) Go
8 4 (4.65%) Clojure
8 4 (4.65%) F#
8 4 (4.65%) Rust
9 2 (2.33%) T-SQL
9 2 (2.33%) VBScript
10 1 (1.16%) C++
10 1 (1.16%) ES6
10 1 (1.16%) Lua
10 1 (1.16%) PowerShell
10 1 (1.16%) Python
10 1 (1.16%) Ruby
10 1 (1.16%) TypeScript
10 1 (1.16%) VB
Qualifications
1 1 (1.16%) Degree
1 1 (1.16%) ISEB
1 1 (1.16%) ISTQB
1 1 (1.16%) ISTQB Foundation Certification
Quality Assurance & Compliance
1 6 (6.98%) QA
2 3 (3.49%) WAI
System Software
1 2 (2.33%) Docker
Systems Management
1 11 (12.79%) Opscode Chef
1 11 (12.79%) Puppet
2 4 (4.65%) Ansible
3 3 (3.49%) TeamSite
Vendors
1 5 (5.81%) Microsoft
2 3 (3.49%) Atlassian
3 2 (2.33%) IBM
3 2 (2.33%) Talend
4 1 (1.16%) New Relic
4 1 (1.16%) Oracle
4 1 (1.16%) Teradata
Hertfordshire
Volt
Rate: £350.00 - £400.00 per day
Posted: Yesterday