Period
to 21 January 2019

The following table provides summary statistics for permanent job vacancies with a requirement for TDD skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited TDD over the 6 months to 21 January 2019 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
UK
6 months to
21 Jan 2019
Same period 2018 Same period 2017
Rank 24 19 21
Rank change year-on-year -5 +2 +4
Permanent jobs citing TDD 12,004 15,797 14,711
As % of all permanent IT jobs advertised in the UK 7.96% 9.19% 8.36%
As % of the Processes & Methodologies category 8.68% 10.01% 9.15%
Number of salaries quoted 10,183 13,669 13,301
UK median annual salary £55,000 £50,000 £50,000
Median salary % change year-on-year +10.00% - -
10th Percentile £33,750 £32,500 £32,500
90th Percentile £87,500 £78,750 £77,500
UK excluding London median annual salary £50,000 £45,000 £45,000
% change year-on-year +11.11% - +4.65%

TDD is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies with a requirement for process or methodology skills.

All Process and Methodology Skills
UK
Permanent vacancies with a requirement for process or methodology skills 138,253 157,812 160,722
As % of all permanent IT jobs advertised in the UK 91.69% 91.80% 91.34%
Number of salaries quoted 109,025 127,041 132,889
UK median annual salary £52,500 £50,000 £47,500
Median salary % change year-on-year +5.00% +5.26% -
10th Percentile £29,979 £28,500 £27,750
90th Percentile £85,000 £80,000 £78,750
UK excluding London median annual salary £45,000 £45,000 £42,500
% change year-on-year - +5.88% -

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
Salary Trend

This chart provides the 3-month moving average for salaries quoted in permanent IT jobs citing TDD.

Salary trend for TDD in the UK

TDD
Salary Histogram

The salary distribution of IT jobs citing TDD over the 6 months to 21 January 2019.

Salary histogram for TDD in the UK

TDD
Top 16 Job Locations

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing TDD within the UK over the 6 months to 21 January 2019. 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
Permanent
IT Job Ads
Median Salary
Past 6 Months
Median Salary
% Change
on Same Period
Last Year
Live
Job
Vacancies
England -5 11,317 £55,000 +4.76% 2,204
UK excluding London -5 6,299 £50,000 +11.11% 1,253
London -7 5,504 £65,000 +4.00% 1,059
South East -5 1,996 £50,000 +11.11% 321
North of England -4 1,740 £47,500 +5.56% 366
North West -7 971 £50,000 +11.11% 206
South West -5 796 £50,000 +5.26% 142
Yorkshire +5 656 £45,000 - 128
Midlands +1 649 £45,000 +12.50% 184
East of England -11 637 £52,500 +8.25% 132
West Midlands +12 366 £45,000 +12.50% 103
Scotland -19 348 £47,500 -5.00% 62
East Midlands -13 283 £42,500 - 81
North East +15 117 £45,000 - 32
Wales -11 108 £45,000 +12.50% 35
Northern Ireland -2 63 £42,500 +6.25% 11

For the 6 months to 21 January 2019, IT jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads with a requirement for TDD.

1 9,111 (75.90%) Agile Software Development
2 5,203 (43.34%) C#
3 4,732 (39.42%) BDD
4 4,720 (39.32%) JavaScript
5 4,562 (38.00%) Java
6 4,514 (37.60%) .NET
7 3,414 (28.44%) Continuous Integration
8 3,410 (28.41%) Scrum
9 3,249 (27.07%) SQL
10 3,152 (26.26%) MVC
11 2,931 (24.42%) AngularJS
12 2,883 (24.02%) SQL Server
13 2,777 (23.13%) HTML
14 2,630 (21.91%) ASP.NET
15 2,619 (21.82%) Software Engineering
15 2,619 (21.82%) Git (software)
16 2,473 (20.60%) CSS
17 2,264 (18.86%) Microservices
18 2,204 (18.36%) Finance
19 2,182 (18.18%) Test Automation
20 2,125 (17.70%) RESTful
21 1,917 (15.97%) ASP.NET MVC
22 1,847 (15.39%) Amazon AWS
23 1,831 (15.25%) DevOps
24 1,797 (14.97%) Node.js
25 1,782 (14.85%) ASP.NET Web API
26 1,768 (14.73%) Spring
27 1,734 (14.45%) Microsoft Azure
28 1,688 (14.06%) OO
29 1,658 (13.81%) React

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
1 399 (3.32%) Elasticsearch
2 379 (3.16%) Confluence
3 305 (2.54%) Apache
4 263 (2.19%) Apache Spark
5 258 (2.15%) CMS
6 193 (1.61%) Tomcat
7 166 (1.38%) IIS
8 146 (1.22%) JBoss
9 104 (0.87%) EPiServer
10 94 (0.78%) Umbraco
11 89 (0.74%) Sitecore CMS
12 87 (0.72%) WebSphere
13 81 (0.67%) nginx
13 81 (0.67%) WordPress
14 65 (0.54%) SharePoint
15 64 (0.53%) Drupal
15 64 (0.53%) NServiceBus
16 63 (0.52%) Cloud Foundry
17 60 (0.50%) WebLogic
18 50 (0.42%) Apache Solr
Applications
1 34 (0.28%) Microsoft Office
2 21 (0.17%) Microsoft Excel
3 20 (0.17%) Photoshop
4 18 (0.15%) Microsoft Project
5 16 (0.13%) MS Visio
6 14 (0.12%) Microsoft PowerPoint
7 12 (0.100%) Chatbot
8 8 (0.067%) InVision
9 6 (0.050%) Maya
10 5 (0.042%) Adobe Illustrator
10 5 (0.042%) Open Workbench
11 4 (0.033%) Adobe Creative Suite
11 4 (0.033%) Fireworks
11 4 (0.033%) Mingle
12 3 (0.025%) Spreadsheet
13 2 (0.017%) Snapchat
14 1 (0.008%) HipChat
14 1 (0.008%) InDesign
14 1 (0.008%) InfoPath
14 1 (0.008%) SPSS
Business Applications
1 65 (0.54%) Payment Gateway
2 47 (0.39%) Dynamics CRM
3 32 (0.27%) Magento
4 19 (0.16%) Eloqua
5 10 (0.083%) FastStats
6 9 (0.075%) Oracle BPM
7 6 (0.050%) Distributed Ledger
7 6 (0.050%) Oracle EBS
7 6 (0.050%) Oracle Retail
8 4 (0.033%) Adobe Campaign
8 4 (0.033%) Dynamics AX
8 4 (0.033%) SAP BPC
8 4 (0.033%) SAP CO
8 4 (0.033%) SAP FI
8 4 (0.033%) SAP FI/CO
8 4 (0.033%) SAP FS
8 4 (0.033%) SAP FSCM
8 4 (0.033%) SunGard GMI
9 3 (0.025%) SAP Hybris
10 2 (0.017%) Markit EDM
Cloud Services
1 1,847 (15.39%) Amazon AWS
2 1,734 (14.45%) Microsoft Azure
3 382 (3.18%) GitHub
4 325 (2.71%) SaaS
5 293 (2.44%) Google Cloud Platform
6 273 (2.27%) Serverless
7 231 (1.92%) npm
8 149 (1.24%) Amazon EC2
9 144 (1.20%) Cloud Computing
9 144 (1.20%) PaaS
10 118 (0.98%) OpenShift
11 91 (0.76%) AWS Lambda
12 79 (0.66%) IaaS
13 70 (0.58%) Amazon S3
13 70 (0.58%) Office 365
14 53 (0.44%) NuGet
15 47 (0.39%) Amazon SQS
16 44 (0.37%) Amazon EMR
17 43 (0.36%) G Suite
18 40 (0.33%) Dynamics 365
Communications & Networking
1 473 (3.94%) Internet
2 227 (1.89%) HTTP
3 70 (0.58%) Broadband
4 63 (0.52%) TCP/IP
5 55 (0.46%) Hyperconnected
6 49 (0.41%) SSL
7 41 (0.34%) Wireless
8 27 (0.22%) Firewall
9 25 (0.21%) AMQP
10 23 (0.19%) Wi-Fi
11 22 (0.18%) RIP
12 17 (0.14%) VLAN
13 15 (0.12%) HTTPS
13 15 (0.12%) Network Security
14 14 (0.12%) Bluetooth
14 14 (0.12%) DNS
15 13 (0.11%) SSH
16 11 (0.092%) OpenLDAP
16 11 (0.092%) Reverse Proxy
17 10 (0.083%) Skype
Database & Business Intelligence
1 2,883 (24.02%) SQL Server
2 1,522 (12.68%) NoSQL
3 1,080 (9.00%) SQL Server 2016
4 753 (6.27%) MySQL
5 680 (5.66%) Big Data
6 676 (5.63%) MongoDB
7 619 (5.16%) PostgreSQL
8 520 (4.33%) Relational Database
9 288 (2.40%) Hadoop
10 283 (2.36%) Redis
11 282 (2.35%) Apache Cassandra
12 158 (1.32%) RDBMS
13 143 (1.19%) SQL Server Integration Services
14 134 (1.12%) Amazon DynamoDB
15 122 (1.02%) Oracle Database
16 112 (0.93%) Blockchain
17 106 (0.88%) SQL Server Reporting Services
18 92 (0.77%) SQL Server 2012
19 86 (0.72%) Data Warehouse
20 83 (0.69%) Cosmos DB
Development Applications
1 2,619 (21.82%) Git (software)
2 1,381 (11.50%) Jenkins
3 1,041 (8.67%) JIRA
4 1,036 (8.63%) Selenium
5 794 (6.61%) Visual Studio
6 703 (5.86%) Maven
7 682 (5.68%) Cucumber
8 578 (4.82%) TeamCity
9 524 (4.37%) JUnit
10 514 (4.28%) Team Foundation Server
11 431 (3.59%) NUnit
12 372 (3.10%) Subversion
13 301 (2.51%) SpecFlow
14 292 (2.43%) WebDriver
15 290 (2.42%) SoapUI
16 289 (2.41%) gulp
17 270 (2.25%) webpack
18 264 (2.20%) Gradle
19 261 (2.17%) Octopus Deploy
20 203 (1.69%) JMeter
General
1 2,204 (18.36%) Finance
2 648 (5.40%) Banking
3 625 (5.21%) Retail
4 608 (5.06%) Games
5 410 (3.42%) Marketing
6 257 (2.14%) Telecoms
7 197 (1.64%) Advertising
8 184 (1.53%) Manufacturing
9 178 (1.48%) Electronics
10 148 (1.23%) Law
11 118 (0.98%) Front Office
11 118 (0.98%) Investment Banking
12 106 (0.88%) Automotive
13 90 (0.75%) Publishing
14 84 (0.70%) Financial Institution
15 73 (0.61%) Back Office
16 67 (0.56%) Legal
17 45 (0.37%) Pharmaceutical
18 38 (0.32%) Music Industry
19 30 (0.25%) Military
Job Titles
1 8,345 (69.52%) Developer
2 2,762 (23.01%) .NET Developer
3 2,270 (18.91%) Java Developer
4 2,107 (17.55%) C# Developer
5 1,694 (14.11%) Senior Developer
6 1,536 (12.80%) C# .NET Developer
7 1,098 (9.15%) Software Engineer
8 824 (6.86%) Software Developer
9 655 (5.46%) ASP.NET Developer
10 627 (5.22%) C# ASP.NET Developer
11 543 (4.52%) Agile Developer
12 515 (4.29%) Senior Java Developer
13 502 (4.18%) JavaScript Developer
14 496 (4.13%) Front End Developer (Client-Side Developer)
15 483 (4.02%) Lead Developer
16 450 (3.75%) Java Engineer
17 434 (3.62%) Senior .NET Developer
18 426 (3.55%) Full Stack Developer
19 425 (3.54%) ASP.NET MVC Developer
20 359 (2.99%) Test Engineer
Libraries, Frameworks & Software Standards
1 4,514 (37.60%) .NET
2 2,931 (24.42%) AngularJS
3 2,777 (23.13%) HTML
4 2,630 (21.91%) ASP.NET
5 2,473 (20.60%) CSS
6 2,125 (17.70%) RESTful
7 1,917 (15.97%) ASP.NET MVC
8 1,797 (14.97%) Node.js
9 1,782 (14.85%) ASP.NET Web API
10 1,768 (14.73%) Spring
11 1,658 (13.81%) React
12 1,503 (12.52%) Web Services
13 1,438 (11.98%) REST
14 1,223 (10.19%) .NET Framework
15 1,195 (9.96%) HTML5
16 1,093 (9.11%) jQuery
17 1,068 (8.90%) WCF
18 811 (6.76%) Entity Framework
19 801 (6.67%) Twitter Bootstrap
20 720 (6.00%) .NET Core
Miscellaneous
1 1,494 (12.45%) Greenfield Project
2 816 (6.80%) User Experience
3 654 (5.45%) Fintech
4 556 (4.63%) Enterprise Software
5 442 (3.68%) Analytical Skills
6 397 (3.31%) Mobile App
7 293 (2.44%) Self-Motivation
8 242 (2.02%) Algorithms
9 127 (1.06%) Data Structures
10 107 (0.89%) Tandem
11 102 (0.85%) Cloud Native
12 101 (0.84%) Virtual Team
13 79 (0.66%) Foreign Exchange (FX)
14 76 (0.63%) Social Media
15 75 (0.62%) Hedge funds
16 72 (0.60%) Linux Command Line
17 70 (0.58%) BBC
17 70 (0.58%) Social Network
18 60 (0.50%) Blog
19 58 (0.48%) Derivative
Operating Systems
1 1,026 (8.55%) Linux
2 707 (5.89%) Windows
3 422 (3.52%) Android
4 359 (2.99%) Apple iOS
5 265 (2.21%) Unix
6 72 (0.60%) Windows Server
7 67 (0.56%) CentOS
8 49 (0.41%) Red Hat Enterprise Linux
9 42 (0.35%) Ubuntu
10 23 (0.19%) openSUSE
11 22 (0.18%) Windows 10
12 18 (0.15%) Mac OS X
13 13 (0.11%) Solaris
14 9 (0.075%) Debian
15 7 (0.058%) Mac OS
16 6 (0.050%) Windows 7
17 5 (0.042%) VMS
18 3 (0.025%) DC/OS
18 3 (0.025%) watchOS
18 3 (0.025%) Windows Server 2012
Processes & Methodologies
1 9,111 (75.90%) Agile Software Development
2 4,732 (39.42%) BDD
3 3,414 (28.44%) Continuous Integration
4 3,410 (28.41%) Scrum
5 3,152 (26.26%) MVC
6 2,619 (21.82%) Software Engineering
7 2,264 (18.86%) Microservices
8 2,182 (18.18%) Test Automation
9 1,831 (15.25%) DevOps
10 1,688 (14.06%) OO
11 1,520 (12.66%) Kanban
12 1,224 (10.20%) Unit Testing
13 1,176 (9.80%) Continuous Delivery
14 1,047 (8.72%) Pair Programming
15 1,034 (8.61%) Problem-Solving
16 1,016 (8.46%) Web Application Development
17 1,005 (8.37%) SOLID
18 1,004 (8.36%) Mentoring
19 909 (7.57%) SDLC
20 860 (7.16%) Web Development
Programming Languages
1 5,203 (43.34%) C#
2 4,720 (39.32%) JavaScript
3 4,562 (38.00%) Java
4 3,249 (27.07%) SQL
5 1,529 (12.74%) Python
6 1,178 (9.81%) Java 8
7 953 (7.94%) Ruby
8 756 (6.30%) C++
9 673 (5.61%) Scala
10 652 (5.43%) PHP
11 514 (4.28%) TypeScript
12 415 (3.46%) T-SQL
13 383 (3.19%) ES6
14 365 (3.04%) C
15 284 (2.37%) PowerShell
16 269 (2.24%) Go
17 168 (1.40%) Bash Shell
18 151 (1.26%) Apple Swift
19 141 (1.17%) Kotlin
20 136 (1.13%) Groovy
Qualifications
1 1,293 (10.77%) Degree
2 446 (3.72%) Computer Science Degree
3 390 (3.25%) Security Cleared
4 238 (1.98%) SC Cleared
5 128 (1.07%) DV Cleared
6 119 (0.99%) ISTQB
7 84 (0.70%) Microsoft Certification
8 66 (0.55%) ISEB
9 65 (0.54%) Numerate Degree
10 35 (0.29%) ISTQB Foundation Certification
11 30 (0.25%) Master's Degree
11 30 (0.25%) PMI Certification
12 23 (0.19%) CISSP
13 20 (0.17%) MCSE
14 19 (0.16%) SAFe Agilist
15 15 (0.12%) AWS Certification
16 14 (0.12%) DBS Check
16 14 (0.12%) PhD
17 13 (0.11%) MCPD
18 11 (0.092%) SANS
Quality Assurance & Compliance
1 951 (7.92%) QA
2 44 (0.37%) GDPR
3 38 (0.32%) PSD2
4 34 (0.28%) Data Quality
5 23 (0.19%) PMO
6 13 (0.11%) WCAG
7 10 (0.083%) ISO/IEC 27001
8 8 (0.067%) SLA
9 6 (0.050%) PMBOK
10 5 (0.042%) MiFID
11 4 (0.033%) EMIR
11 4 (0.033%) FATCA
12 3 (0.025%) WAI
13 2 (0.017%) FedRAMP
13 2 (0.017%) ISO 9001
13 2 (0.017%) PCI DSS
13 2 (0.017%) SEPA
13 2 (0.017%) Web Application Security Consortium
14 1 (0.008%) ISO 20022
14 1 (0.008%) ISO 8583
System Software
1 1,345 (11.20%) Docker
2 101 (0.84%) Active Directory
3 46 (0.38%) HDFS
4 45 (0.37%) Apache ZooKeeper
5 43 (0.36%) vSphere
6 39 (0.32%) Firmware
7 34 (0.28%) VirtualBox
8 27 (0.22%) VMware Infrastructure
9 15 (0.12%) Virtual Machines
10 10 (0.083%) Hyper-V
11 9 (0.075%) Apache Flume
11 9 (0.075%) Varnish
12 7 (0.058%) Oracle RAC
13 6 (0.050%) NFS
13 6 (0.050%) Samba
13 6 (0.050%) VMware ESXi
13 6 (0.050%) VMware NSX
14 3 (0.025%) etcd
15 2 (0.017%) iptables
15 2 (0.017%) Microsoft App-V
Systems Management
1 536 (4.47%) Kubernetes
2 401 (3.34%) Ansible
3 274 (2.28%) Terraform
4 271 (2.26%) Puppet
5 239 (1.99%) Opscode Chef
6 79 (0.66%) Kibana
7 64 (0.53%) HP Quality Center
8 46 (0.38%) Salt
9 34 (0.28%) Rancher
10 30 (0.25%) Hadoop YARN
11 27 (0.22%) Grafana
12 23 (0.19%) HP ALM
13 21 (0.17%) Mesos
14 19 (0.16%) Prometheus
15 15 (0.12%) Single Sign-On
16 14 (0.12%) Docker Swarm
16 14 (0.12%) ZABBIX
17 13 (0.11%) Nagios
18 12 (0.100%) Packer
19 11 (0.092%) HAProxy
Vendors
1 1,626 (13.55%) Microsoft
2 654 (5.45%) Oracle
3 503 (4.19%) Google
4 184 (1.53%) SAP
5 181 (1.51%) Xamarin
6 174 (1.45%) Facebook
7 131 (1.09%) Apple
7 131 (1.09%) Atlassian
8 129 (1.07%) Sitecore
9 122 (1.02%) WorldPay
10 83 (0.69%) Splunk
11 78 (0.65%) Twitter
12 72 (0.60%) IBM
13 68 (0.57%) Zend
14 67 (0.56%) Yahoo!
15 66 (0.55%) Sony
16 61 (0.51%) Red Hat
17 57 (0.47%) HP
18 49 (0.41%) CA Agile Central
19 48 (0.40%) Adobe