The following table provides summary statistics for contract job vacancies advertised in the City of London 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 24 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)
London / City of London
3 months to
24 Jun 2017
Same period 2016 Same period 2015
Rank 10 10 20
Rank change year-on-year 0 +10  
Contract jobs citing TDD 356 364 432
As % of all contract IT jobs advertised in the City of London 10.90% 10.76% 7.42%
As % of the Processes & Methodologies category 12.37% 12.52% 9.16%
Number of daily rates quoted 318 341 382
Median daily rate £525 £500 £480
Median daily rate % change year-on-year +5.00% +4.16%  
90% offered a daily rate of more than £400 £400 £375
10% offered a daily rate of more than £633 £625 £600
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 £42.50
% change year-on-year +3.75% -5.88%  

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 the City of London with a requirement for process and methodology skills.

Contract Process & Methodology Skills
City of London
Contract job vacancies with a requirement for process and methodology skills 2879 2907 4718
As % of all contract IT job vacancies advertised in the City of London 88.15% 85.93% 81.07%
Number of daily rates quoted 2210 2380 3714
Median daily rate £500 £475 £473
Median daily rate % change year-on-year +5.26% +0.52%  
90% offered a daily rate of more than £350 £335 £325
10% offered a daily rate of more than £650 £625 £625
UK excluding London median daily rate £415 £400 £380
% change year-on-year +3.75% +5.26%  
Number of hourly rates quoted 23 24 55
Median hourly rate £20.00 £19.00 £24.50
Median hourly rate % change year-on-year +5.26% -22.44%  
90% offered a hourly rate of more than £14.75 £12.50 £15.00
10% offered a hourly rate of more than £41.00 £31.50 £56.20
UK excluding London median hourly rate £34.00 £28.50 £30.00
% change year-on-year +19.29% -5.00%  

TDD
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London 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 the City of London

TDD
Contractor Daily Rate Trend in the City of London

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

Contractor daily rate trend for TDD in the City of London

TDD
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing TDD in the City of London over the 3 months to 24 June 2017.

Contractor daily rate histogram for TDD in the City of London

TDD
Contractor Hourly Rate Trend in the City of London

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

Contractor hourly rate trend for TDD in the City of London

For the 6 months to 24 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 City of London region with a requirement for TDD.

1 519 (76.66%) Agile Software Development
2 319 (47.12%) Java
3 296 (43.72%) BDD
4 256 (37.81%) JavaScript
5 202 (29.84%) Scrum
6 192 (28.36%) Finance
7 174 (25.70%) C#
8 155 (22.90%) HTML
9 149 (22.01%) CSS
10 144 (21.27%) AngularJS
11 138 (20.38%) OO
11 138 (20.38%) Continuous Integration
12 136 (20.09%) Test Automation
12 136 (20.09%) Banking
13 125 (18.46%) MVC
14 122 (18.02%) React
15 116 (17.13%) Spring
16 115 (16.99%) Node.js
17 114 (16.84%) SQL
18 111 (16.40%) REST
19 110 (16.25%) Web Services
20 109 (16.10%) Microservices
21 106 (15.66%) DevOps
22 105 (15.51%) SQL Server
23 103 (15.21%) .NET
24 101 (14.92%) Pair Programming
25 97 (14.33%) Git (software)
26 96 (14.18%) Amazon AWS
26 96 (14.18%) NoSQL
27 94 (13.88%) Scala

TDD
Co-occurring IT Skills in the City of London 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 42 (6.20%) Apache Spark
2 23 (3.40%) Elasticsearch
3 22 (3.25%) Apache
4 18 (2.66%) IIS
5 17 (2.51%) SharePoint
6 16 (2.36%) BizTalk Server
7 14 (2.07%) Confluence
7 14 (2.07%) Mule
7 14 (2.07%) Tomcat
8 10 (1.48%) JBoss
9 8 (1.18%) WebLogic
10 7 (1.03%) Cloud Foundry
11 5 (0.74%) Apache Solr
12 4 (0.59%) CMS
13 3 (0.44%) Apache Pig
13 3 (0.44%) DataSynapse
13 3 (0.44%) EPiServer
13 3 (0.44%) Oracle Coherence
13 3 (0.44%) Sitecore CMS
14 2 (0.30%) Drupal
Applications
1 4 (0.59%) Microsoft Office
2 2 (0.30%) Photoshop
3 1 (0.15%) Microsoft Excel
3 1 (0.15%) MS Visio
Business Applications
1 19 (2.81%) Dynamics CRM
2 16 (2.36%) Dynamics AX
3 3 (0.44%) Eloqua
3 3 (0.44%) ION MarketView
4 1 (0.15%) Actimize
4 1 (0.15%) Endur
4 1 (0.15%) Magento
4 1 (0.15%) Payment Gateway
4 1 (0.15%) RMDS
Cloud Services
1 96 (14.18%) Amazon AWS
2 56 (8.27%) Microsoft Azure
3 21 (3.10%) PaaS
4 19 (2.81%) GitHub
4 19 (2.81%) IaaS
5 8 (1.18%) AWS CloudFormation
6 7 (1.03%) Slack
7 5 (0.74%) Amazon EC2
8 4 (0.59%) Heroku
8 4 (0.59%) TestFlight
9 3 (0.44%) AWS Lambda
9 3 (0.44%) Google Play
10 2 (0.30%) BrowserStack
10 2 (0.30%) OpenShift
10 2 (0.30%) SaaS
10 2 (0.30%) vREST
11 1 (0.15%) AWS Elastic Beanstalk
11 1 (0.15%) CloudBees
11 1 (0.15%) Google Cloud Platform
11 1 (0.15%) Salesforce Service Cloud
Communications & Networking
1 20 (2.95%) HTTP
2 5 (0.74%) Internet
3 4 (0.59%) DNS
4 3 (0.44%) FTP
4 3 (0.44%) SSL
4 3 (0.44%) TCP/IP
5 2 (0.30%) LDAP
6 1 (0.15%) Bluetooth
6 1 (0.15%) Intranet
6 1 (0.15%) Kerberos
6 1 (0.15%) LAN
6 1 (0.15%) Network Security
6 1 (0.15%) RTP
6 1 (0.15%) RTSP
6 1 (0.15%) SNMP
6 1 (0.15%) WAN
Database & Business Intelligence
1 105 (15.51%) SQL Server
2 96 (14.18%) NoSQL
3 86 (12.70%) MongoDB
4 58 (8.57%) Apache Cassandra
5 45 (6.65%) MySQL
6 41 (6.06%) Big Data
7 36 (5.32%) Hadoop
8 31 (4.58%) SQL Server Integration Services
9 30 (4.43%) Relational Database
10 25 (3.69%) SQL Server 2008
11 19 (2.81%) SQL Server 2016
12 18 (2.66%) PostgreSQL
13 14 (2.07%) SQL Server 2012
14 11 (1.62%) Hazelcast
15 10 (1.48%) CouchDB
16 9 (1.33%) HBase
16 9 (1.33%) SQLite
17 7 (1.03%) Couchbase
18 6 (0.89%) MarkLogic
19 5 (0.74%) QlikView
Development Applications
1 97 (14.33%) Git (software)
2 78 (11.52%) Jenkins
3 69 (10.19%) JIRA
4 56 (8.27%) Selenium
5 54 (7.98%) Cucumber
6 42 (6.20%) Jasmine
7 41 (6.06%) gulp
8 40 (5.91%) Maven
9 39 (5.76%) Grunt
10 36 (5.32%) Team Foundation Server
11 33 (4.87%) JUnit
12 29 (4.28%) webpack
13 26 (3.84%) WebDriver
14 24 (3.55%) TeamCity
15 23 (3.40%) IntelliJ
15 23 (3.40%) Mocha
15 23 (3.40%) Mockito
16 22 (3.25%) SpecFlow
17 18 (2.66%) Moq
18 17 (2.51%) NUnit
General
1 192 (28.36%) Finance
2 136 (20.09%) Banking
3 52 (7.68%) Front Office
4 45 (6.65%) Investment Banking
5 26 (3.84%) Retail
6 14 (2.07%) Advertising
7 12 (1.77%) Marketing
8 10 (1.48%) Games
8 10 (1.48%) Publishing
9 8 (1.18%) Retail Banking
9 8 (1.18%) Telecoms
10 4 (0.59%) Digital Economy
10 4 (0.59%) Law
10 4 (0.59%) Legal
11 3 (0.44%) Corporate Banking
12 2 (0.30%) Automotive
12 2 (0.30%) Back Office
12 2 (0.30%) Wholesale Banking
13 1 (0.15%) Financial Institution
Job Titles
1 543 (80.21%) Developer
2 189 (27.92%) Java Developer
3 141 (20.83%) Senior Developer
4 73 (10.78%) C# Developer
5 63 (9.31%) Senior Java Developer
6 62 (9.16%) Full Stack Developer
7 48 (7.09%) JavaScript Developer
8 45 (6.65%) Scala Developer
9 43 (6.35%) Agile Developer
10 41 (6.06%) Front End Developer (Client-Side Developer)
11 38 (5.61%) .NET Developer
12 33 (4.87%) WPF Developer
13 31 (4.58%) Agile Java Developer
14 27 (3.99%) Analyst
14 27 (3.99%) Node.js Developer
15 24 (3.55%) Angular Developer
15 24 (3.55%) C# WPF Developer
15 24 (3.55%) Python Developer
16 22 (3.25%) Senior Scala Developer
17 21 (3.10%) Senior C# Developer
Libraries, Frameworks & Software Standards
1 155 (22.90%) HTML
2 149 (22.01%) CSS
3 144 (21.27%) AngularJS
4 122 (18.02%) React
5 116 (17.13%) Spring
6 115 (16.99%) Node.js
7 111 (16.40%) REST
8 110 (16.25%) Web Services
9 103 (15.21%) .NET
10 93 (13.74%) HTML5
11 77 (11.37%) RESTful
12 63 (9.31%) WPF
13 62 (9.16%) WCF
14 51 (7.53%) ASP.NET
15 50 (7.39%) jQuery
16 49 (7.24%) JSON
17 47 (6.94%) SOAP
18 41 (6.06%) CSS3
19 37 (5.47%) Redux
20 36 (5.32%) Entity Framework
Miscellaneous
1 57 (8.42%) Greenfield Project
2 46 (6.79%) User Experience
3 42 (6.20%) Fintech
4 37 (5.47%) Mobile App
5 29 (4.28%) Foreign Exchange (FX)
6 25 (3.69%) Computer Science
7 19 (2.81%) Public Cloud
8 17 (2.51%) Client/Server
9 15 (2.22%) Analytical Skills
9 15 (2.22%) Data Structures
9 15 (2.22%) Hedge funds
10 14 (2.07%) Derivative
11 13 (1.92%) Credit Risk
11 13 (1.92%) Enterprise Software
12 11 (1.62%) iPad
13 10 (1.48%) Market Risk
13 10 (1.48%) NHS
14 9 (1.33%) Algorithms
14 9 (1.33%) Equities
14 9 (1.33%) Fixed Income
Operating Systems
1 66 (9.75%) Linux
2 45 (6.65%) Windows
3 36 (5.32%) Unix
4 31 (4.58%) Apple iOS
5 29 (4.28%) Android
6 10 (1.48%) Windows Server
7 5 (0.74%) Red Hat Enterprise Linux
8 3 (0.44%) CoreOS
9 2 (0.30%) Windows Server 2012
10 1 (0.15%) Mac OS X
10 1 (0.15%) Ubuntu
10 1 (0.15%) Windows Server 2008
Processes & Methodologies
1 519 (76.66%) Agile Software Development
2 296 (43.72%) BDD
3 202 (29.84%) Scrum
4 138 (20.38%) Continuous Integration
4 138 (20.38%) OO
5 136 (20.09%) Test Automation
6 125 (18.46%) MVC
7 109 (16.10%) Microservices
8 106 (15.66%) DevOps
9 101 (14.92%) Pair Programming
10 92 (13.59%) Kanban
11 83 (12.26%) Multithreading
11 83 (12.26%) Software Engineering
12 73 (10.78%) E-Commerce
13 72 (10.64%) Front End Development
14 70 (10.34%) Unit Testing
15 60 (8.86%) SOLID
16 53 (7.83%) Open Source
16 53 (7.83%) SOA
17 49 (7.24%) Web Development
Programming Languages
1 319 (47.12%) Java
2 256 (37.81%) JavaScript
3 174 (25.70%) C#
4 114 (16.84%) SQL
5 94 (13.88%) Scala
6 62 (9.16%) Python
7 31 (4.58%) Groovy
8 25 (3.69%) ES6
9 23 (3.40%) Apple Swift
9 23 (3.40%) Objective-C
10 22 (3.25%) TypeScript
11 21 (3.10%) Go
11 21 (3.10%) Ruby
12 15 (2.22%) T-SQL
13 13 (1.92%) Bash Shell
14 12 (1.77%) C++
15 10 (1.48%) PHP
16 9 (1.33%) PL/SQL
17 8 (1.18%) Shell Script
18 7 (1.03%) Kotlin
Qualifications
1 27 (3.99%) Degree
2 10 (1.48%) Computer Science Degree
2 10 (1.48%) Security Cleared
3 6 (0.89%) SC Cleared
4 3 (0.44%) ISEB
5 2 (0.30%) DV Cleared
5 2 (0.30%) ISTQB
6 1 (0.15%) BPSS Clearance
6 1 (0.15%) CFA
6 1 (0.15%) ISTQB Advanced Certification
6 1 (0.15%) ISTQB Foundation Certification
6 1 (0.15%) Numerate Degree
Quality Assurance & Compliance
1 54 (7.98%) QA
2 7 (1.03%) MiFID
3 2 (0.30%) Dodd-Frank
4 1 (0.15%) IFRS
4 1 (0.15%) IFRS 9
System Software
1 52 (7.68%) Docker
2 8 (1.18%) HDFS
3 4 (0.59%) Apache ZooKeeper
4 2 (0.30%) vCloud
4 2 (0.30%) VMware Infrastructure
5 1 (0.15%) Active Directory
5 1 (0.15%) Varnish
Systems Management
1 30 (4.43%) Puppet
2 23 (3.40%) Opscode Chef
3 13 (1.92%) Ansible
4 12 (1.77%) Kubernetes
5 6 (0.89%) Nagios
5 6 (0.89%) Terraform
6 5 (0.74%) Graphite
7 4 (0.59%) HAProxy
7 4 (0.59%) logstash
8 3 (0.44%) Docker Swarm
9 2 (0.30%) Control-M
9 2 (0.30%) Grafana
9 2 (0.30%) Kibana
9 2 (0.30%) Mesos
10 1 (0.15%) BladeLogic
10 1 (0.15%) HP SiteScope
10 1 (0.15%) OpenIDM
10 1 (0.15%) ZABBIX
Vendors
1 41 (6.06%) Microsoft
2 21 (3.10%) New Relic
3 20 (2.95%) Oracle
4 14 (2.07%) Google
5 9 (1.33%) IBM
6 8 (1.18%) Telerik
7 7 (1.03%) Xamarin
8 6 (0.89%) Atlassian
8 6 (0.89%) Red Hat
9 5 (0.74%) Apple
9 5 (0.74%) Reuters
10 4 (0.59%) ION Trading
10 4 (0.59%) Sitecore
10 4 (0.59%) Sybase
11 3 (0.44%) CA Agile Central
11 3 (0.44%) Marketo
11 3 (0.44%) Salesforce.com
11 3 (0.44%) Splunk
11 3 (0.44%) Typemock
12 2 (0.30%) FXall
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