Period
to 18 January 2022

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 6 months to 18 January 2022 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)
Central London > City of London
6 months to
18 Jan 2022
Same period 2021 Same period 2020
Rank 19 14 16
Rank change year-on-year -5 +2 -6
Contract jobs citing TDD 302 188 446
As % of all contract jobs advertised in the City of London 7.55% 9.21% 9.04%
As % of the Processes & Methodologies category 8.32% 10.22% 10.12%
Number of daily rates quoted 250 169 400
10th Percentile £449 £413 £425
25th Percentile £500 £488 £486
Median daily rate (50th Percentile) £600 £550 £550
Median % change year-on-year +9.09% - -
75th Percentile £686 £638 £625
90th Percentile £738 £688 £675
Central London median daily rate £605 £550 £550
% change year-on-year +10.00% - +0.23%
Number of hourly rates quoted 0 0 1
10th Percentile - - -
25th Percentile - - £61.67
Median hourly rate - - £63.33
75th Percentile - - £65.00
90th Percentile - - -
Central London median hourly rate - - £63.33

TDD is in the Processes and Methodologies category. The following 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 or methodology skills.

All Process and Methodology Skills
City of London
Contract vacancies with a requirement for process or methodology skills 3,629 1,840 4,405
As % of all contract IT jobs advertised in the City of London 90.73% 90.15% 89.33%
Number of daily rates quoted 2,818 1,376 3,460
10th Percentile £370 £313 £320
25th Percentile £469 £413 £413
Median daily rate (50th Percentile) £550 £525 £513
Median % change year-on-year +4.76% +2.44% -
75th Percentile £660 £600 £605
90th Percentile £750 £688 £675
Central London median daily rate £550 £515 £510
% change year-on-year +6.80% +0.98% -0.49%
Number of hourly rates quoted 36 23 49
10th Percentile £19.13 £13.63 £12.03
25th Percentile £30.00 £19.50 £14.25
Median hourly rate £43.25 £26.50 £20.00
Median % change year-on-year +63.21% +32.50% +5.26%
75th Percentile £61.75 £36.38 £25.76
90th Percentile £64.25 £46.00 £52.25
Central London median hourly rate £43.25 £27.00 £20.42
% change year-on-year +60.19% +32.26% +6.05%

TDD
Job Vacancy Trend in the City of London

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

Job vacancy trend for TDD in the City of London

TDD
Contractor Daily Rate Trend in the City of London

3-month moving average daily rate quoted in jobs citing TDD in the City of London.

Daily rate trend for TDD in the City of London

TDD
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing TDD in the City of London over the 6 months to 18 January 2022.

Daily rate histogram for TDD in the City of London

TDD
Contractor Hourly Rate Trend in the City of London

3-month moving average hourly rates quoted in jobs citing TDD in the City of London.

Hourly rate trend for TDD in the City of London

For the 6 months to 18 January 2022, IT contractor 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 contract job ads across the City of London region with a requirement for TDD.

1 203 (67.22%) Agile Software Development
2 123 (40.73%) Java
3 112 (37.09%) BDD
4 77 (25.50%) JavaScript
4 77 (25.50%) Microservices
5 64 (21.19%) Scrum
6 63 (20.86%) Git (software)
7 61 (20.20%) Software Engineering
8 58 (19.21%) Azure
9 55 (18.21%) DevOps
10 54 (17.88%) AWS
11 50 (16.56%) HTML
11 50 (16.56%) Docker
12 49 (16.23%) CSS
13 47 (15.56%) Finance
14 45 (14.90%) AngularJS
15 44 (14.57%) React
15 44 (14.57%) Pair Programming
16 41 (13.58%) Test Automation
16 41 (13.58%) Spring
17 40 (13.25%) SQL
17 40 (13.25%) Kubernetes
18 39 (12.91%) .NET
18 39 (12.91%) Continuous Integration
19 38 (12.58%) Greenfield Project
20 37 (12.25%) Jenkins
21 36 (11.92%) Kotlin
22 34 (11.26%) Python
23 33 (10.93%) Banking
24 32 (10.60%) Kanban

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 7 (2.32%) Apache Airflow
1 7 (2.32%) Confluence
2 5 (1.66%) Apache
2 5 (1.66%) Apache Spark
3 4 (1.32%) SharePoint
4 3 (0.99%) CMS
4 3 (0.99%) IIS
4 3 (0.99%) Oracle Coherence
4 3 (0.99%) SharePoint 2013
5 2 (0.66%) Headless CMS
5 2 (0.66%) JBoss
5 2 (0.66%) Moodle
5 2 (0.66%) Mule
5 2 (0.66%) nginx
5 2 (0.66%) Red Hat Fuse
6 1 (0.33%) Elasticsearch
6 1 (0.33%) OpenStack
6 1 (0.33%) Tomcat
6 1 (0.33%) Umbraco
6 1 (0.33%) WebLogic
Applications
1 1 (0.33%) Microsoft Office
Business Applications
1 2 (0.66%) Dynamics CRM
2 1 (0.33%) RMDS
Cloud Services
1 58 (19.21%) Azure
2 54 (17.88%) AWS
3 12 (3.97%) GitHub
4 8 (2.65%) GCP
5 6 (1.99%) Serverless
6 5 (1.66%) AWS Lambda
6 5 (1.66%) PaaS
6 5 (1.66%) Power Platform
6 5 (1.66%) SaaS
7 4 (1.32%) Amazon EMR
7 4 (1.32%) Azure Active Directory
8 3 (0.99%) AWS CloudFormation
8 3 (0.99%) npm
8 3 (0.99%) NuGet
8 3 (0.99%) Power Automate
8 3 (0.99%) PowerApps
9 2 (0.66%) Amazon EC2
9 2 (0.66%) Amazon ECS
9 2 (0.66%) Azure Service Bus
9 2 (0.66%) dbt
Communications & Networking
1 3 (0.99%) Broadband
2 2 (0.66%) 5G
2 2 (0.66%) AMQP
2 2 (0.66%) MQTT
3 1 (0.33%) DECT
3 1 (0.33%) Internet
3 1 (0.33%) IPv4
3 1 (0.33%) IPv6
3 1 (0.33%) Multicast
3 1 (0.33%) PPP
3 1 (0.33%) UPnP
3 1 (0.33%) Wi-Fi
Database & Business Intelligence
1 27 (8.94%) SQL Server
2 24 (7.95%) PostgreSQL
3 16 (5.30%) MySQL
4 10 (3.31%) MongoDB
5 9 (2.98%) NoSQL
5 9 (2.98%) Relational Database
6 8 (2.65%) SQL Server Integration Services
7 6 (1.99%) Oracle Database
8 5 (1.66%) RDBMS
9 3 (0.99%) Apache Ignite
9 3 (0.99%) Data Warehouse
9 3 (0.99%) Hazelcast
9 3 (0.99%) Infinispan
10 2 (0.66%) Amazon Redshift
10 2 (0.66%) Apache Cassandra
10 2 (0.66%) BigQuery
10 2 (0.66%) Hadoop
10 2 (0.66%) Power BI
10 2 (0.66%) SQL Server Analysis Services
11 1 (0.33%) Data Lake
Development Applications
1 63 (20.86%) Git (software)
2 37 (12.25%) Jenkins
3 29 (9.60%) Cucumber
4 25 (8.28%) JIRA
5 18 (5.96%) Selenium
6 17 (5.63%) Maven
7 8 (2.65%) GitLab
7 8 (2.65%) Mockito
8 7 (2.32%) webpack
9 6 (1.99%) Grunt
9 6 (1.99%) Visual Studio
10 5 (1.66%) Bitbucket
10 5 (1.66%) Gatling
10 5 (1.66%) JUnit
10 5 (1.66%) SonarQube
10 5 (1.66%) SpecFlow
10 5 (1.66%) TeamCity
10 5 (1.66%) WebDriver
11 4 (1.32%) Octopus Deploy
11 4 (1.32%) Robot Framework
General
1 47 (15.56%) Finance
2 33 (10.93%) Banking
3 22 (7.28%) Games
4 21 (6.95%) Front Office
5 19 (6.29%) Social Skills
6 12 (3.97%) Publishing
7 11 (3.64%) Investment Banking
8 10 (3.31%) Analytical Skills
9 7 (2.32%) Retail
10 4 (1.32%) Legal
11 3 (0.99%) Back Office
11 3 (0.99%) Documentation Skills
11 3 (0.99%) Financial Institution
11 3 (0.99%) Marketing
11 3 (0.99%) Public Sector
12 2 (0.66%) Advertising
12 2 (0.66%) Presentation Skills
12 2 (0.66%) Telecoms
13 1 (0.33%) Manufacturing
13 1 (0.33%) Military
Job Titles
1 246 (81.46%) Developer
2 92 (30.46%) Java Developer
3 27 (8.94%) Senior Developer
4 19 (6.29%) .NET Developer
5 18 (5.96%) Scala Developer
6 17 (5.63%) PHP Developer
7 16 (5.30%) Python Developer
8 14 (4.64%) Front End Developer (Client-Side Developer)
9 13 (4.30%) Angular Developer
9 13 (4.30%) JavaScript Developer
9 13 (4.30%) Software Engineer
10 12 (3.97%) Senior Java Developer
11 10 (3.31%) Backend Developer
12 9 (2.98%) Full Stack Developer
12 9 (2.98%) Java Engineer
12 9 (2.98%) Python Engineer
13 8 (2.65%) C# Developer
14 7 (2.32%) Data Engineer
14 7 (2.32%) Software Developer
15 6 (1.99%) Senior Data Engineer
Libraries, Frameworks & Software Standards
1 50 (16.56%) HTML
2 49 (16.23%) CSS
3 45 (14.90%) AngularJS
4 44 (14.57%) React
5 41 (13.58%) Spring
6 39 (12.91%) .NET
7 32 (10.60%) REST
8 29 (9.60%) Web Services
9 27 (8.94%) HTML5
9 27 (8.94%) RESTful
9 27 (8.94%) Sass
10 25 (8.28%) Kafka
11 23 (7.62%) Node.js
12 21 (6.95%) Vue.js
13 20 (6.62%) Redux
14 18 (5.96%) CSS3
14 18 (5.96%) LESS
14 18 (5.96%) Spring Boot
15 17 (5.63%) Laravel
15 17 (5.63%) Vuetify.js
Miscellaneous
1 38 (12.58%) Greenfield Project
2 15 (4.97%) Foreign Exchange (FX)
3 14 (4.64%) User Experience
4 12 (3.97%) Enterprise Software
5 9 (2.98%) Data Structures
5 9 (2.98%) Management Information System
5 9 (2.98%) Self-Motivation
6 8 (2.65%) Mobile App
7 7 (2.32%) Legacy Systems
8 6 (1.99%) Fixed Income
8 6 (1.99%) Hedge funds
8 6 (1.99%) Reference Data
9 4 (1.32%) Cloud Native
9 4 (1.32%) N-Tier
10 3 (0.99%) Derivative
10 3 (0.99%) Hybrid Cloud
10 3 (0.99%) Interest Rate Derivative
10 3 (0.99%) Public Cloud
11 2 (0.66%) Learning Management System
11 2 (0.66%) Video on Demand
Operating Systems
1 12 (3.97%) Linux
2 10 (3.31%) Unix
3 5 (1.66%) Apple iOS
4 4 (1.32%) Android
5 2 (0.66%) OpenWrt
6 1 (0.33%) Mac OS X
6 1 (0.33%) Red Hat Enterprise Linux
Processes & Methodologies
1 203 (67.22%) Agile Software Development
2 112 (37.09%) BDD
3 77 (25.50%) Microservices
4 64 (21.19%) Scrum
5 61 (20.20%) Software Engineering
6 55 (18.21%) DevOps
7 44 (14.57%) Pair Programming
8 41 (13.58%) Test Automation
9 39 (12.91%) Continuous Integration
10 32 (10.60%) Full Stack Development
10 32 (10.60%) Kanban
11 31 (10.26%) Unit Testing
12 30 (9.93%) MVC
13 29 (9.60%) SDLC
14 28 (9.27%) Fintech
14 28 (9.27%) Front End Development
15 22 (7.28%) Multithreading
16 20 (6.62%) E-Commerce
17 19 (6.29%) Clean Code
18 18 (5.96%) Low Latency
Programming Languages
1 123 (40.73%) Java
2 77 (25.50%) JavaScript
3 40 (13.25%) SQL
4 36 (11.92%) Kotlin
5 34 (11.26%) Python
6 31 (10.26%) C#
7 28 (9.27%) Scala
8 23 (7.62%) Java 11
9 21 (6.95%) TypeScript
10 19 (6.29%) PHP
11 18 (5.96%) Java 8
12 9 (2.98%) Ruby
13 7 (2.32%) C
14 3 (0.99%) C++
14 3 (0.99%) Go
14 3 (0.99%) Shell Script
14 3 (0.99%) VBScript
15 2 (0.66%) Apple Swift
15 2 (0.66%) Bash
16 1 (0.33%) PowerShell
Qualifications
1 14 (4.64%) Degree
2 11 (3.64%) SC Cleared
2 11 (3.64%) Security Cleared
3 4 (1.32%) Computer Science Degree
4 3 (0.99%) ISTQB
4 3 (0.99%) ISTQB Foundation Certification
4 3 (0.99%) Numerate Degree
4 3 (0.99%) OCPJP
4 3 (0.99%) Sun Certification
5 2 (0.66%) AWS Certification
5 2 (0.66%) ISTQB Advanced Certification
6 1 (0.33%) Master's Degree
Quality Assurance & Compliance
1 16 (5.30%) QA
2 4 (1.32%) Accessibility
3 3 (0.99%) GDPR
4 2 (0.66%) WCAG
5 1 (0.33%) Data Quality
5 1 (0.33%) IFRS
5 1 (0.33%) JTAG
5 1 (0.33%) Sarbanes-Oxley
5 1 (0.33%) Solvency II
System Software
1 50 (16.56%) Docker
2 3 (0.99%) Active Directory
Systems Management
1 40 (13.25%) Kubernetes
2 23 (7.62%) Terraform
3 7 (2.32%) Grafana
3 7 (2.32%) Prometheus
4 6 (1.99%) Ansible
5 1 (0.33%) Netcool
5 1 (0.33%) Opscode Chef
5 1 (0.33%) Puppet
Vendors
1 15 (4.97%) Oracle
2 10 (3.31%) Microsoft
3 4 (1.32%) Nintex
4 3 (0.99%) Google
4 3 (0.99%) Sun
4 3 (0.99%) Xamarin
5 2 (0.66%) Salesforce.com
5 2 (0.66%) ServiceNow
5 2 (0.66%) Splunk
5 2 (0.66%) Sybase
5 2 (0.66%) Virgin Media
6 1 (0.33%) AppDynamics
6 1 (0.33%) Databricks
6 1 (0.33%) Facebook
6 1 (0.33%) Guidewire
6 1 (0.33%) hybris
6 1 (0.33%) MuleSoft
6 1 (0.33%) Salesforce Marketing Cloud
6 1 (0.33%) SAP
6 1 (0.33%) Solace