The following table provides summary statistics for contract job vacancies 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 29 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)
UK
3 months to
29 Jun 2017
Same period 2016 Same period 2015
Rank 16 31 31
Rank change year-on-year +15 0  
Contract jobs citing TDD 3594 3148 2935
As % of all contract IT jobs advertised in the UK 7.63% 5.86% 5.24%
As % of the Processes & Methodologies category 9.03% 7.03% 6.48%
Number of daily rates quoted 2789 2548 2231
UK median daily rate £475 £450 £425
Median daily rate % change year-on-year +5.55% +5.88%  
10th Percentile £331 £325 £313
90th Percentile £625 £613 £588
UK excluding London median daily rate £421 £413 £375
% change year-on-year +1.93% +10.00%  
Number of hourly rates quoted 20 13 8
UK median hourly rate £40.75 £40.00 £43.75
Median hourly rate % change year-on-year +1.87% -8.57%  
10th Percentile £31.25 £30.40 £34.11
90th Percentile £63.75 £45.00 £50.00
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 with a requirement for process and methodology skills.

Contract Process & Methodology Skills
UK
Contract job vacancies with a requirement for process and methodology skills 39787 44801 45267
As % of all contract IT job vacancies advertised in the UK 84.46% 83.41% 80.77%
Number of daily rates quoted 99353 111983 101262
UK median daily rate £450 £438 £413
Median daily rate % change year-on-year +2.85% +6.06%  
10th Percentile £305 £283 £274
90th Percentile £625 £625 £600
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 3077 2943 3102
UK median hourly rate £32.50 £28.00 £27.50
Median hourly rate % change year-on-year +16.07% +1.81%  
10th Percentile £12.28 £12.50 £11.50
90th Percentile £54.00 £50.78 £51.17
UK excluding London median hourly rate £33.50 £28.00 £30.00
% change year-on-year +19.64% -6.66%  

TDD
Job Vacancy Trend

Job postings citing TDD as a percentage of all IT jobs advertised.

Job vacancy trend for TDD in the UK

TDD
Contractor Daily Rate Trend

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

Contractor daily rate trend for TDD in the UK

TDD
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing TDD over the 3 months to 29 June 2017.

Contractor daily rate histogram for TDD in the UK

TDD
Contractor Hourly Rate Trend

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

Contractor hourly rate trend for TDD in the UK

TDD
Contractor Hourly Rate Histogram

The hourly rate distribution of IT jobs citing TDD over the 3 months to 29 June 2017.

Contractor hourly rate histogram for TDD in the UK

TDD
Top 11 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the UK over the 3 months to 29 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
England +14 3419 £475 +5.55% 1214
London +7 2069 £500 +5.26% 616
UK excluding London +8 1485 £421 +1.93% 643
South East +19 436 £425 - 181
North of England +7 388 £415 -2.35% 195
East of England +36 255 £488 +21.87% 69
Midlands +23 188 £365 -10.15% 86
Scotland +34 106 £425 +13.33% 36
South West -2 88 £394 +5.00% 66
Northern Ireland -28 18 £400 -8.57% 2
Wales -26 17 £365 -8.75% 8

For the 6 months to 29 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 with a requirement for TDD.

1 5126 (77.62%) Agile Software Development
2 2878 (43.58%) Java
3 2531 (38.33%) JavaScript
4 2468 (37.37%) BDD
5 2133 (32.30%) Scrum
6 1820 (27.56%) HTML
7 1737 (26.30%) Continuous Integration
8 1705 (25.82%) CSS
9 1504 (22.77%) AngularJS
10 1495 (22.64%) Git (software)
11 1489 (22.55%) C#
12 1419 (21.49%) Test Automation
13 1390 (21.05%) .NET
14 1203 (18.22%) MVC
15 1195 (18.10%) SQL
16 1134 (17.17%) Spring
17 1116 (16.90%) Finance
18 1085 (16.43%) DevOps
19 1080 (16.35%) Jenkins
20 1041 (15.76%) Node.js
21 1038 (15.72%) HTML5
22 1031 (15.61%) OO
23 1012 (15.32%) Web Services
24 994 (15.05%) REST
25 957 (14.49%) Microservices
26 926 (14.02%) Kanban
27 860 (13.02%) RESTful
28 857 (12.98%) React
29 775 (11.74%) SQL Server
30 767 (11.61%) Pair Programming

TDD
Co-occurring IT Skills 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
1 305 (4.62%) Confluence
2 244 (3.69%) Apache Spark
3 240 (3.63%) Elasticsearch
4 204 (3.09%) Apache
5 165 (2.50%) JBoss
6 159 (2.41%) Tomcat
7 155 (2.35%) Oracle SOA Suite
8 142 (2.15%) WebSphere
9 141 (2.14%) CMS
10 94 (1.42%) Apache Solr
11 91 (1.38%) Mule
12 90 (1.36%) WebLogic
13 74 (1.12%) Cloud Foundry
14 66 (1.00%) SharePoint
15 59 (0.89%) OpenStack
16 49 (0.74%) Oracle Service Bus
17 47 (0.71%) IIS
18 43 (0.65%) Sitecore CMS
19 42 (0.64%) WebSphere Application Server
20 39 (0.59%) NServiceBus
Applications
1 64 (0.97%) Photoshop
2 43 (0.65%) Microsoft Office
3 27 (0.41%) MS Visio
4 21 (0.32%) Microsoft Excel
5 13 (0.20%) Adobe Illustrator
6 11 (0.17%) Adobe Creative Suite
7 7 (0.11%) Microsoft Project
8 6 (0.091%) Spreadsheet
9 3 (0.045%) Adobe After Effects
9 3 (0.045%) Microsoft PowerPoint
10 2 (0.030%) Fireworks
10 2 (0.030%) OmniGraffle
11 1 (0.015%) GIMP
11 1 (0.015%) HipChat
Business Applications
1 147 (2.23%) SAP Oil and Gas
2 53 (0.80%) Dynamics CRM
3 30 (0.45%) ION MarketView
3 30 (0.45%) Payment Gateway
4 22 (0.33%) SAP Hybris
5 16 (0.24%) Dynamics AX
6 14 (0.21%) Magento
7 5 (0.076%) Eloqua
8 4 (0.061%) Oracle BPM
9 3 (0.045%) BusinessWorks
9 3 (0.045%) RMDS
9 3 (0.045%) SDL Web 8
10 2 (0.030%) Endur
10 2 (0.030%) FastStats
10 2 (0.030%) Oracle CRM
10 2 (0.030%) Oracle ERP
10 2 (0.030%) Siebel CRM
11 1 (0.015%) BondVision
11 1 (0.015%) iTrent
11 1 (0.015%) Pega PRPC
Cloud Services
1 745 (11.28%) Amazon AWS
2 493 (7.47%) Microsoft Azure
3 270 (4.09%) GitHub
4 106 (1.61%) PaaS
5 89 (1.35%) Amazon EC2
6 68 (1.03%) IaaS
7 65 (0.98%) AWS Lambda
7 65 (0.98%) SaaS
8 50 (0.76%) AWS CloudFormation
9 38 (0.58%) Amazon S3
10 37 (0.56%) Cloud Computing
11 33 (0.50%) Amazon SQS
12 27 (0.41%) Heroku
13 26 (0.39%) Google Cloud Platform
14 21 (0.32%) Slack
15 18 (0.27%) OpenShift
16 14 (0.21%) Datadog
16 14 (0.21%) Google Play
17 11 (0.17%) Google Analytics
18 10 (0.15%) Bluemix
Communications & Networking
1 266 (4.03%) HTTP
2 104 (1.57%) SSL
3 98 (1.48%) Internet
4 69 (1.04%) TCP/IP
5 33 (0.50%) LDAP
6 32 (0.48%) Kerberos
7 28 (0.42%) DNS
8 19 (0.29%) Intranet
9 18 (0.27%) Network Security
10 15 (0.23%) AMQP
11 14 (0.21%) Firewall
12 9 (0.14%) Skype
12 9 (0.14%) SMS
13 8 (0.12%) DVB
13 8 (0.12%) HTTPS
14 7 (0.11%) Extranet
14 7 (0.11%) IP Telephony
15 6 (0.091%) MQTT
15 6 (0.091%) WAN
16 5 (0.076%) Bluetooth
Database & Business Intelligence
1 775 (11.74%) SQL Server
2 688 (10.42%) NoSQL
3 543 (8.22%) MongoDB
4 471 (7.13%) MySQL
5 432 (6.54%) Relational Database
6 354 (5.36%) Big Data
7 330 (5.00%) PostgreSQL
8 314 (4.75%) Hadoop
9 232 (3.51%) Apache Cassandra
10 127 (1.92%) RDBMS
11 118 (1.79%) HBase
12 102 (1.54%) SQL Server 2008
13 96 (1.45%) SQL Server 2012
14 93 (1.41%) Redis
15 91 (1.38%) Oracle Database
16 81 (1.23%) SQL Server Integration Services
17 64 (0.97%) Amazon DynamoDB
18 57 (0.86%) Apache Hive
19 45 (0.68%) SQL Server Reporting Services
20 42 (0.64%) SQL Server 2016
Development Applications
1 1495 (22.64%) Git (software)
2 1080 (16.35%) Jenkins
3 666 (10.08%) JIRA
4 576 (8.72%) Cucumber
5 566 (8.57%) Selenium
6 551 (8.34%) JUnit
7 494 (7.48%) Maven
8 320 (4.85%) Subversion
9 302 (4.57%) TeamCity
10 293 (4.44%) Mockito
11 287 (4.35%) Team Foundation Server
12 286 (4.33%) Jasmine
13 265 (4.01%) gulp
14 259 (3.92%) Gradle
15 235 (3.56%) Grunt
16 209 (3.16%) WebDriver
17 191 (2.89%) Mocha
18 171 (2.59%) NUnit
19 168 (2.54%) webpack
20 161 (2.44%) SpecFlow
General
1 1116 (16.90%) Finance
2 634 (9.60%) Banking
3 250 (3.79%) Retail
4 247 (3.74%) Front Office
5 218 (3.30%) Marketing
6 200 (3.03%) Telecoms
7 197 (2.98%) Investment Banking
8 164 (2.48%) Manufacturing
9 153 (2.32%) Electronics
10 138 (2.09%) Games
11 65 (0.98%) Back Office
11 65 (0.98%) Publishing
12 43 (0.65%) Advertising
13 38 (0.58%) Financial Institution
14 33 (0.50%) Legal
15 30 (0.45%) Automotive
16 21 (0.32%) Corporate Banking
17 20 (0.30%) Retail Banking
18 13 (0.20%) Law
19 12 (0.18%) Billing
Job Titles
1 5012 (75.89%) Developer
2 1553 (23.52%) Java Developer
3 804 (12.17%) .NET Developer
4 795 (12.04%) Senior Developer
5 653 (9.89%) C# Developer
6 593 (8.98%) JavaScript Developer
7 542 (8.21%) Agile Developer
8 406 (6.15%) Front End Developer (Client-Side Developer)
9 396 (6.00%) Full Stack Developer
10 383 (5.80%) C# .NET Developer
11 331 (5.01%) Angular Developer
12 307 (4.65%) Senior Java Developer
13 269 (4.07%) Agile Java Developer
14 248 (3.76%) Node.js Developer
15 232 (3.51%) Scala Developer
16 219 (3.32%) Architect
17 205 (3.10%) HTML Developer
18 194 (2.94%) Analyst
19 179 (2.71%) Tester
20 172 (2.60%) UI Developer
Libraries, Frameworks & Software Standards
1 1820 (27.56%) HTML
2 1705 (25.82%) CSS
3 1504 (22.77%) AngularJS
4 1390 (21.05%) .NET
5 1134 (17.17%) Spring
6 1041 (15.76%) Node.js
7 1038 (15.72%) HTML5
8 1012 (15.32%) Web Services
9 994 (15.05%) REST
10 860 (13.02%) RESTful
11 857 (12.98%) React
12 692 (10.48%) JSON
13 677 (10.25%) CSS3
14 642 (9.72%) ASP.NET
15 637 (9.65%) XML
16 590 (8.93%) jQuery
17 481 (7.28%) SOAP
18 422 (6.39%) Hibernate
19 418 (6.33%) ASP.NET Web API
20 414 (6.27%) ASP.NET MVC
Miscellaneous
1 531 (8.04%) Greenfield Project
2 396 (6.00%) User Experience
3 328 (4.97%) Mobile App
4 220 (3.33%) Analytical Skills
5 193 (2.92%) Computer Science
6 150 (2.27%) Enterprise Software
7 142 (2.15%) Algorithms
7 142 (2.15%) Fintech
8 106 (1.61%) Foreign Exchange (FX)
9 102 (1.54%) Derivative
10 101 (1.53%) Data Structures
11 92 (1.39%) Fixed Income
12 74 (1.12%) Virtual Team
13 65 (0.98%) iPad
13 65 (0.98%) Public Cloud
14 54 (0.82%) iPhone
15 53 (0.80%) Equities
16 51 (0.77%) Client/Server
17 44 (0.67%) Linux Command Line
18 39 (0.59%) Blog
Operating Systems
1 755 (11.43%) Linux
2 368 (5.57%) Unix
3 278 (4.21%) Windows
4 257 (3.89%) Android
5 246 (3.73%) Apple iOS
6 118 (1.79%) Mac OS X
7 88 (1.33%) Red Hat Enterprise Linux
8 30 (0.45%) Solaris
9 26 (0.39%) Windows Server
10 24 (0.36%) Ubuntu
11 16 (0.24%) CoreOS
11 16 (0.24%) HPUX
12 13 (0.20%) CentOS
13 10 (0.15%) VMS
14 5 (0.076%) Windows Server 2012
15 4 (0.061%) AIX
15 4 (0.061%) Windows Server 2008
16 3 (0.045%) Embedded Linux
16 3 (0.045%) Windows 10
17 2 (0.030%) Mac OS
Processes & Methodologies
1 5126 (77.62%) Agile Software Development
2 2468 (37.37%) BDD
3 2133 (32.30%) Scrum
4 1737 (26.30%) Continuous Integration
5 1419 (21.49%) Test Automation
6 1203 (18.22%) MVC
7 1085 (16.43%) DevOps
8 1031 (15.61%) OO
9 957 (14.49%) Microservices
10 926 (14.02%) Kanban
11 767 (11.61%) Pair Programming
12 751 (11.37%) Software Engineering
13 682 (10.33%) E-Commerce
14 642 (9.72%) Front End Development
15 597 (9.04%) SOA
16 582 (8.81%) Unit Testing
17 553 (8.37%) Open Source
18 501 (7.59%) Continuous Delivery
19 497 (7.53%) Web Development
20 426 (6.45%) Mentoring
Programming Languages
1 2878 (43.58%) Java
2 2531 (38.33%) JavaScript
3 1489 (22.55%) C#
4 1195 (18.10%) SQL
5 685 (10.37%) Python
6 595 (9.01%) Scala
7 452 (6.84%) Ruby
8 229 (3.47%) ES6
9 200 (3.03%) PHP
10 190 (2.88%) C++
11 163 (2.47%) TypeScript
12 161 (2.44%) Groovy
13 156 (2.36%) Apple Swift
14 149 (2.26%) T-SQL
15 129 (1.95%) Shell Script
16 124 (1.88%) Objective-C
17 107 (1.62%) Go
18 106 (1.61%) Perl
19 94 (1.42%) C
20 85 (1.29%) PL/SQL
Qualifications
1 286 (4.33%) Degree
2 279 (4.22%) Security Cleared
3 178 (2.70%) SC Cleared
4 93 (1.41%) Computer Science Degree
5 55 (0.83%) BPSS Clearance
6 42 (0.64%) ISEB
7 38 (0.58%) DV Cleared
8 35 (0.53%) ISTQB
9 14 (0.21%) CTC Cleared
10 12 (0.18%) BC Cleared
11 11 (0.17%) Sun Certification
12 10 (0.15%) DBS Check
13 9 (0.14%) Microsoft Certification
14 8 (0.12%) ISTQB Foundation Certification
14 8 (0.12%) Master's Degree
14 8 (0.12%) Numerate Degree
14 8 (0.12%) PMI Certification
14 8 (0.12%) RHCE
14 8 (0.12%) RHCSA
15 6 (0.091%) PMP
Quality Assurance & Compliance
1 506 (7.66%) QA
2 43 (0.65%) MiFID
3 37 (0.56%) WCAG
4 26 (0.39%) Disclosure Scotland
5 23 (0.35%) Data Quality
6 15 (0.23%) EMIR
7 13 (0.20%) Dodd-Frank
8 10 (0.15%) SLA
9 8 (0.12%) FATCA
10 6 (0.091%) WAI
11 5 (0.076%) PCI DSS
12 2 (0.030%) GxP
12 2 (0.030%) IFRS
12 2 (0.030%) IFRS 9
12 2 (0.030%) ISO 22301
13 1 (0.015%) GCP
13 1 (0.015%) PMO
System Software
1 548 (8.30%) Docker
2 63 (0.95%) HDFS
3 49 (0.74%) Apache ZooKeeper
4 28 (0.42%) Apache Flume
5 19 (0.29%) VMware Infrastructure
6 17 (0.26%) Active Directory
7 9 (0.14%) Virtual Machines
8 8 (0.12%) Firmware
8 8 (0.12%) Varnish
9 7 (0.11%) LXC
10 6 (0.091%) vCloud
10 6 (0.091%) vSphere
11 2 (0.030%) NFS
11 2 (0.030%) zsh
12 1 (0.015%) iptables
12 1 (0.015%) VirtualBox
12 1 (0.015%) Xen
Systems Management
1 262 (3.97%) Puppet
2 248 (3.76%) Ansible
3 234 (3.54%) Opscode Chef
4 134 (2.03%) Kubernetes
5 96 (1.45%) Terraform
6 39 (0.59%) logstash
7 35 (0.53%) Kibana
8 23 (0.35%) Grafana
9 22 (0.33%) Hadoop YARN
9 22 (0.33%) ZABBIX
10 20 (0.30%) Mesos
10 20 (0.30%) Salt
11 19 (0.29%) Nagios
12 18 (0.27%) Graphite
13 16 (0.24%) Oozie
14 10 (0.15%) Control-M
15 9 (0.14%) HP Fortify
15 9 (0.14%) Prometheus
16 8 (0.12%) HP Quality Center
17 7 (0.11%) HAProxy
Vendors
1 509 (7.71%) Oracle
2 397 (6.01%) Microsoft
3 183 (2.77%) SAP
4 108 (1.64%) WSO2
5 92 (1.39%) Google
6 81 (1.23%) Sitecore
7 80 (1.21%) IBM
8 67 (1.01%) Red Hat
9 58 (0.88%) Adobe
10 51 (0.77%) Splunk
11 49 (0.74%) hybris
12 48 (0.73%) Xamarin
13 44 (0.67%) New Relic
14 38 (0.58%) Perforce
15 36 (0.55%) Cloudera
16 33 (0.50%) Apple
16 33 (0.50%) Atlassian
16 33 (0.50%) MuleSoft
17 32 (0.48%) DevExpress
17 32 (0.48%) TIBCO
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