Period
to 28 September 2021

The following table provides summary statistics for permanent job vacancies advertised in London 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 28 September 2021 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
England > London
6 months to
28 Sep 2021
Same period 2020 Same period 2019
Rank 28 22 27
Rank change year-on-year -6 +5 -3
Permanent jobs citing TDD 4,369 1,924 4,596
As % of all permanent jobs advertised in London 8.86% 9.75% 8.31%
As % of the Processes & Methodologies category 9.28% 10.37% 8.89%
Number of salaries quoted 2,310 1,674 3,795
10th Percentile £50,000 £47,725 £38,750
25th Percentile £57,500 £55,000 £50,394
Median annual salary (50th Percentile) £75,000 £70,000 £67,500
Median % change year-on-year +7.14% +3.70% -
75th Percentile £87,500 £85,000 £82,500
90th Percentile £100,000 £97,500 £95,000
England median annual salary £62,500 £60,000 £57,500
% change year-on-year +4.17% +4.35% +4.55%

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 advertised in London with a requirement for process or methodology skills.

All Process and Methodology Skills
London
Permanent vacancies with a requirement for process or methodology skills 47,069 18,550 51,720
As % of all permanent IT jobs advertised in London 95.40% 94.01% 93.53%
Number of salaries quoted 30,802 15,541 42,090
10th Percentile £42,500 £42,500 £36,250
25th Percentile £52,500 £52,500 £47,500
Median annual salary (50th Percentile) £70,000 £70,000 £65,000
Median % change year-on-year - +7.69% +4.00%
75th Percentile £88,750 £87,500 £82,500
90th Percentile £106,250 £110,000 £100,000
England median annual salary £57,500 £57,000 £52,500
% change year-on-year +0.88% +8.57% +1.94%

TDD
Job Vacancy Trend in London

Job postings citing TDD as a proportion of all IT jobs advertised in London.

Job vacancy trend for TDD in London

TDD
Salary Trend in London

3-month moving average salary quoted in jobs citing TDD in London.

Salary trend for TDD in London

TDD
Salary Histogram in London

Salary distribution for jobs citing TDD in London over the 6 months to 28 September 2021.

Salary histogram for TDD in London

TDD
Job Locations in London

The table below looks at the demand and provides a guide to the median salaries quoted in IT jobs citing TDD within the London region over the 6 months to 28 September 2021. 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
Central London -23 413 £77,500 +6.90% 291
West London +15 292 £67,500 +8.00% 116
South London -10 94 £65,000 +4.00% 19
East London -26 8 £70,000 +7.69% 55
North London -14 2 £65,000 +30.00% 11
TDD
England

For the 6 months to 28 September 2021, 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 across the London region with a requirement for TDD.

1 3,073 (70.34%) Agile Software Development
2 1,941 (44.43%) JavaScript
3 1,662 (38.04%) Java
4 1,619 (37.06%) React
5 1,616 (36.99%) Microservices
6 1,547 (35.41%) AWS
7 1,426 (32.64%) Software Engineering
8 1,304 (29.85%) BDD
9 1,278 (29.25%) Docker
10 1,133 (25.93%) Finance
11 1,051 (24.06%) C#
12 1,045 (23.92%) Node.js
13 1,034 (23.67%) Kubernetes
14 1,022 (23.39%) DevOps
15 1,019 (23.32%) Azure
16 997 (22.82%) Scrum
17 984 (22.52%) SQL
18 971 (22.22%) Git (software)
19 968 (22.16%) .NET
20 953 (21.81%) Full Stack Development
21 917 (20.99%) Python
22 908 (20.78%) Continuous Integration
23 882 (20.19%) TypeScript
24 853 (19.52%) REST
25 837 (19.16%) Test Automation
26 824 (18.86%) Social Skills
27 821 (18.79%) CSS
28 803 (18.38%) AngularJS
29 793 (18.15%) HTML
30 789 (18.06%) Spring

TDD
Co-occurring IT Skills in 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
1 295 (6.75%) Elasticsearch
2 126 (2.88%) CMS
3 110 (2.52%) Confluence
4 80 (1.83%) Apache Spark
5 38 (0.87%) Apache
6 29 (0.66%) Drupal
7 28 (0.64%) Apache Solr
8 26 (0.60%) Headless CMS
8 26 (0.60%) WordPress
9 25 (0.57%) IIS
10 20 (0.46%) Cloud Foundry
10 20 (0.46%) IBM Domino
10 20 (0.46%) nginx
11 15 (0.34%) SharePoint
12 14 (0.32%) Apache Airflow
12 14 (0.32%) EPiServer
13 13 (0.30%) Umbraco
14 12 (0.27%) Tomcat
15 11 (0.25%) NServiceBus
16 10 (0.23%) Jetty
Applications
1 32 (0.73%) Microsoft Office
1 32 (0.73%) Sketch
2 31 (0.71%) InVision
3 11 (0.25%) Figma
4 8 (0.18%) Chatbot
5 6 (0.14%) Microsoft Excel
6 3 (0.069%) Maya
7 1 (0.023%) Photoshop
7 1 (0.023%) Zeplin
Business Applications
1 53 (1.21%) Payment Gateway
2 32 (0.73%) Dynamics CRM
3 11 (0.25%) Magento
4 7 (0.16%) Oracle BPM
5 6 (0.14%) Distributed Ledger
5 6 (0.14%) MetaTrader
5 6 (0.14%) R3 Corda
6 5 (0.11%) Refinitiv Enterprise Platform
6 5 (0.11%) RMDS
7 4 (0.092%) Summit
8 3 (0.069%) Salesforce.com CRM
9 2 (0.046%) Academy Revenues and Benefits
9 2 (0.046%) Actimize
9 2 (0.046%) IBM Operational Decision Manager
9 2 (0.046%) NetSuite
9 2 (0.046%) Shopify
10 1 (0.023%) Oracle Receivables
10 1 (0.023%) Sentinel
Cloud Services
1 1,547 (35.41%) AWS
2 1,019 (23.32%) Azure
3 596 (13.64%) Serverless
4 573 (13.12%) GCP
5 315 (7.21%) AWS Lambda
6 307 (7.03%) GitHub
7 297 (6.80%) SaaS
8 175 (4.01%) Amazon S3
9 131 (3.00%) Amazon EC2
10 104 (2.38%) AWS CloudFormation
11 101 (2.31%) Amazon ECS
12 87 (1.99%) PaaS
13 85 (1.95%) Heroku
14 74 (1.69%) Azure Functions
15 71 (1.63%) Amazon SQS
16 69 (1.58%) npm
17 52 (1.19%) Amazon Kinesis
17 52 (1.19%) Cloud Computing
18 48 (1.10%) AWS Step Functions
18 48 (1.10%) Codefresh
Communications & Networking
1 224 (5.13%) Broadband
2 174 (3.98%) HTTP
3 35 (0.80%) TCP/IP
4 28 (0.64%) Bluetooth
4 28 (0.64%) DVB
5 26 (0.60%) Internet
6 17 (0.39%) MQTT
7 16 (0.37%) WebEx
8 15 (0.34%) NFC
9 10 (0.23%) Network Security
10 6 (0.14%) RTP
10 6 (0.14%) SSH
11 5 (0.11%) SMS
11 5 (0.11%) SSL
11 5 (0.11%) WPA
12 4 (0.092%) AMQP
12 4 (0.092%) BIG-IP
12 4 (0.092%) DAB
12 4 (0.092%) WAN
12 4 (0.092%) Wireshark
Database & Business Intelligence
1 576 (13.18%) SQL Server
2 528 (12.09%) PostgreSQL
3 488 (11.17%) NoSQL
4 354 (8.10%) Relational Database
5 344 (7.87%) MySQL
6 323 (7.39%) Redis
7 296 (6.78%) MongoDB
8 193 (4.42%) Big Data
9 179 (4.10%) Amazon DynamoDB
10 125 (2.86%) RDBMS
11 94 (2.15%) Amazon RDS
12 88 (2.01%) Amazon Aurora
13 79 (1.81%) Apache Cassandra
14 63 (1.44%) Hadoop
15 57 (1.30%) Blockchain
16 39 (0.89%) Azure SQL Database
17 38 (0.87%) Amazon Athena
17 38 (0.87%) DB2
18 35 (0.80%) Data Warehouse
19 34 (0.78%) Power BI
Development Applications
1 971 (22.22%) Git (software)
2 553 (12.66%) Jenkins
3 277 (6.34%) Selenium
4 263 (6.02%) JIRA
5 235 (5.38%) Cypress.io
6 204 (4.67%) webpack
7 185 (4.23%) GitLab
8 173 (3.96%) NUnit
8 173 (3.96%) Team Foundation Server
9 172 (3.94%) Maven
10 166 (3.80%) Octopus Deploy
11 150 (3.43%) JUnit
12 139 (3.18%) Gradle
12 139 (3.18%) TeamCity
13 135 (3.09%) Cucumber
14 124 (2.84%) Jasmine
15 120 (2.75%) CircleCI
16 113 (2.59%) Postman
17 97 (2.22%) Mocha
18 93 (2.13%) Travis CI
General
1 1,133 (25.93%) Finance
2 824 (18.86%) Social Skills
3 423 (9.68%) Banking
4 231 (5.29%) Analytical Skills
5 210 (4.81%) Retail
6 190 (4.35%) Marketing
7 147 (3.36%) Games
8 133 (3.04%) Inclusion and Diversity
9 116 (2.66%) Publishing
10 101 (2.31%) Front Office
11 99 (2.27%) Investment Banking
12 94 (2.15%) Advertising
13 89 (2.04%) Pharmaceutical
14 83 (1.90%) Public Sector
15 72 (1.65%) Legal
16 56 (1.28%) Telecoms
17 47 (1.08%) Financial Institution
18 45 (1.03%) Retail Banking
19 40 (0.92%) Presentation Skills
20 34 (0.78%) Billing
Job Titles
1 2,428 (55.57%) Developer
2 723 (16.55%) Senior Developer
3 714 (16.34%) Software Engineer
4 584 (13.37%) Java Developer
5 346 (7.92%) Full Stack Developer
6 326 (7.46%) .NET Developer
7 282 (6.45%) Senior Software Engineer
8 280 (6.41%) React Developer
9 266 (6.09%) Front End Developer (Client-Side Developer)
10 231 (5.29%) Java Engineer
11 217 (4.97%) Software Developer
12 188 (4.30%) C# Developer
13 182 (4.17%) Lead Developer
14 161 (3.69%) Senior Java Developer
15 160 (3.66%) Backend Developer
16 127 (2.91%) JavaScript Developer
17 121 (2.77%) C# .NET Developer
17 121 (2.77%) Senior .NET Developer
18 117 (2.68%) Senior React Developer
19 107 (2.45%) Angular Developer
Libraries, Frameworks & Software Standards
1 1,619 (37.06%) React
2 1,045 (23.92%) Node.js
3 968 (22.16%) .NET
4 853 (19.52%) REST
5 821 (18.79%) CSS
6 803 (18.38%) AngularJS
7 793 (18.15%) HTML
8 789 (18.06%) Spring
9 593 (13.57%) Web Services
10 591 (13.53%) RESTful
11 514 (11.76%) .NET Core
12 456 (10.44%) Spring Boot
13 447 (10.23%) Redux
14 444 (10.16%) GraphQL
15 404 (9.25%) Kafka
16 396 (9.06%) HTML5
17 340 (7.78%) .NET Framework
18 305 (6.98%) Jest
19 273 (6.25%) Vue.js
20 262 (6.00%) CSS3
Miscellaneous
1 459 (10.51%) User Experience
2 336 (7.69%) Greenfield Project
3 223 (5.10%) Mobile App
4 183 (4.19%) Algorithms
5 174 (3.98%) Self-Motivation
6 161 (3.69%) Social Media
7 132 (3.02%) Data Structures
7 132 (3.02%) Virtual Team
8 108 (2.47%) Cloud Native
9 105 (2.40%) Enterprise Software
10 96 (2.20%) Video\Live Streaming
11 79 (1.81%) Derivative
12 72 (1.65%) Blog
13 69 (1.58%) Over-the-Top Content
14 67 (1.53%) Hedge funds
15 57 (1.30%) Legacy Systems
16 56 (1.28%) NHS
17 55 (1.26%) Life Science
18 54 (1.24%) STB
18 54 (1.24%) Video on Demand
Operating Systems
1 373 (8.54%) Linux
2 261 (5.97%) Android
3 232 (5.31%) Apple iOS
4 185 (4.23%) Windows
5 155 (3.55%) Unix
6 34 (0.78%) Mesosphere
7 21 (0.48%) Mac OS X
8 15 (0.34%) Embedded Linux
8 15 (0.34%) Mac OS
9 6 (0.14%) CentOS
10 5 (0.11%) Ubuntu
10 5 (0.11%) VMS
11 4 (0.092%) Tizen
11 4 (0.092%) webOS
12 3 (0.069%) DC/OS
13 2 (0.046%) Windows Server
14 1 (0.023%) Amazon Linux
14 1 (0.023%) Solaris
14 1 (0.023%) tvOS
14 1 (0.023%) Windows Server 2012
Processes & Methodologies
1 3,073 (70.34%) Agile Software Development
2 1,616 (36.99%) Microservices
3 1,426 (32.64%) Software Engineering
4 1,304 (29.85%) BDD
5 1,022 (23.39%) DevOps
6 997 (22.82%) Scrum
7 953 (21.81%) Full Stack Development
8 908 (20.78%) Continuous Integration
9 837 (19.16%) Test Automation
10 594 (13.60%) Mentoring
11 543 (12.43%) Unit Testing
12 541 (12.38%) Pair Programming
13 525 (12.02%) Problem-Solving
14 517 (11.83%) SOLID
15 514 (11.76%) SDLC
16 506 (11.58%) Continuous Delivery
17 495 (11.33%) OO
18 489 (11.19%) Front End Development
19 485 (11.10%) Fintech
20 437 (10.00%) Analytics
Programming Languages
1 1,941 (44.43%) JavaScript
2 1,662 (38.04%) Java
3 1,051 (24.06%) C#
4 984 (22.52%) SQL
5 917 (20.99%) Python
6 882 (20.19%) TypeScript
7 325 (7.44%) Java 8
8 297 (6.80%) Kotlin
9 296 (6.78%) ES6
10 286 (6.55%) Scala
11 232 (5.31%) Go
12 215 (4.92%) PHP
13 188 (4.30%) Ruby
14 166 (3.80%) Java 11
15 142 (3.25%) C++
16 106 (2.43%) PowerShell
17 104 (2.38%) Bash Shell
18 95 (2.17%) C
19 79 (1.81%) Apple Swift
20 70 (1.60%) T-SQL
Qualifications
1 372 (8.51%) Degree
2 213 (4.88%) Computer Science Degree
3 58 (1.33%) Security Cleared
4 54 (1.24%) SC Cleared
5 49 (1.12%) Master's Degree
6 26 (0.60%) ISTQB
7 20 (0.46%) PhD
8 19 (0.43%) ISTQB Foundation Certification
9 18 (0.41%) SANS
10 8 (0.18%) ISEB
11 7 (0.16%) Numerate Degree
12 4 (0.092%) A+ Certification
13 3 (0.069%) AWS Certification
13 3 (0.069%) ISEB Practitioner
13 3 (0.069%) ISTQB Advanced Certification
14 2 (0.046%) CITP
14 2 (0.046%) MBA
14 2 (0.046%) Microsoft Certification
14 2 (0.046%) Postgraduate
15 1 (0.023%) PMI Certification
Quality Assurance & Compliance
1 459 (10.51%) QA
2 98 (2.24%) Accessibility
3 50 (1.14%) PSD2
4 36 (0.82%) GDPR
5 27 (0.62%) MiFID
6 25 (0.57%) EMIR
7 22 (0.50%) WCAG
8 17 (0.39%) SLA
9 12 (0.27%) WAI
10 7 (0.16%) Data Quality
11 3 (0.069%) ISO 20022
12 2 (0.046%) ISO/IEC 27001
12 2 (0.046%) SEPA
13 1 (0.023%) HIPAA
13 1 (0.023%) PCI DSS
13 1 (0.023%) SOC 2
System Software
1 1,278 (29.25%) Docker
2 22 (0.50%) Postfix
3 15 (0.34%) Apache ZooKeeper
4 12 (0.27%) Varnish
5 11 (0.25%) Ceph
6 5 (0.11%) Virtual Machines
6 5 (0.11%) vSphere
7 4 (0.092%) NFS
8 3 (0.069%) Active Directory
8 3 (0.069%) VMware Infrastructure
9 1 (0.023%) HDFS
9 1 (0.023%) Platform Symphony
Systems Management
1 1,034 (23.67%) Kubernetes
2 397 (9.09%) Terraform
3 166 (3.80%) Grafana
4 138 (3.16%) Prometheus
5 114 (2.61%) Ansible
6 71 (1.63%) Opscode Chef
7 68 (1.56%) Kibana
7 68 (1.56%) Puppet
8 59 (1.35%) logstash
9 45 (1.03%) Opsgenie
10 34 (0.78%) Automic
10 34 (0.78%) Graylog
11 30 (0.69%) Graphite
12 25 (0.57%) Consul
13 22 (0.50%) Istio
13 22 (0.50%) linkerd
14 19 (0.43%) ZABBIX
15 17 (0.39%) MIIS
16 15 (0.34%) HAProxy
16 15 (0.34%) Pingdom
Vendors
1 379 (8.67%) Google
2 279 (6.39%) Microsoft
3 140 (3.20%) Oracle
4 78 (1.79%) Apple
5 68 (1.56%) Splunk
6 42 (0.96%) New Relic
7 37 (0.85%) Sybase
7 37 (0.85%) YouTube
8 33 (0.76%) LexisNexis
8 33 (0.76%) Salesforce.com
9 30 (0.69%) Spotify
10 26 (0.60%) Atlassian
11 25 (0.57%) IBM
12 21 (0.48%) Databricks
12 21 (0.48%) Netlify
13 16 (0.37%) Talend
14 15 (0.34%) Samsung
14 15 (0.34%) TIBCO
15 14 (0.32%) BT
15 14 (0.32%) HP