Period
to 8 March 2021

The following table provides summary statistics for contract job vacancies advertised in 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 8 March 2021 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)
England > London
6 months to
8 Mar 2021
Same period 2020 Same period 2019
Rank 23 18 15
Rank change year-on-year -5 -3 -6
Contract jobs citing TDD 1,409 2,100 4,036
As % of all contract jobs advertised in London 7.05% 7.71% 9.32%
As % of the Processes & Methodologies category 7.92% 8.78% 10.47%
Number of daily rates quoted 1,342 1,780 3,474
Median daily rate £550 £550 £538
Median daily rate % change year-on-year - +2.33% +2.38%
10th Percentile £409 £421 £413
90th Percentile £663 £700 £674
England median daily rate £525 £525 £525
Number of hourly rates quoted 9 13 1
Median hourly rate £68.00 £61.50 £60.00
Median hourly rate % change year-on-year +10.57% +2.50% +33.33%
England median hourly rate £58.00 £61.50 £46.70
% change year-on-year -5.69% +31.69% +3.78%

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 London with a requirement for process or methodology skills.

All Process and Methodology Skills
London
Contract vacancies with a requirement for process or methodology skills 17,791 23,924 38,555
As % of all contract IT jobs advertised in London 89.07% 87.84% 89.01%
Number of daily rates quoted 12,746 17,406 28,018
Median daily rate £513 £520 £513
Median daily rate % change year-on-year -1.44% +1.46% +2.50%
10th Percentile £330 £320 £325
90th Percentile £700 £699 £675
England median daily rate £475 £475 £475
Number of hourly rates quoted 177 294 386
Median hourly rate £35.00 £25.00 £22.14
Median hourly rate % change year-on-year +40.00% +12.91% -1.59%
10th Percentile £17.90 £12.44 £12.50
90th Percentile £66.50 £54.93 £47.25
Median hourly rate £25.50 £21.05 £22.00
% change year-on-year +21.14% -4.32% -2.22%

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
Contractor Daily Rate Trend in London

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

Daily rate trend for TDD in London

TDD
Daily Rate Histogram in London

Daily rate distribution for jobs citing TDD in London over the 6 months to 8 March 2021.

Daily rate histogram for TDD in London

TDD
Contractor Hourly Rate Trend in London

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

Hourly rate trend for TDD in London

TDD
Hourly Rate Histogram in London

Hourly rate distribution of jobs citing TDD in London over the 6 months to 8 March 2021.

Hourly rate histogram for TDD in London

TDD
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the London region over the 6 months to 8 March 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
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Central London +1 244 £550 - 193
West London +6 44 £550 +4.27% 110
South London 0 25 £505 -1.46% 6
East London +1 14 £528 -4.05% 24
TDD
England

For the 6 months to 8 March 2021, 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 London region with a requirement for TDD.

1 912 (64.73%) Agile Software Development
2 617 (43.79%) Java
3 541 (38.40%) BDD
4 405 (28.74%) JavaScript
5 383 (27.18%) Microservices
6 371 (26.33%) DevOps
7 337 (23.92%) Azure
8 311 (22.07%) AWS
9 290 (20.58%) Scrum
10 286 (20.30%) Git (software)
11 284 (20.16%) Finance
12 277 (19.66%) Software Engineering
13 270 (19.16%) Docker
14 266 (18.88%) Test Automation
15 264 (18.74%) React
16 258 (18.31%) C#
17 254 (18.03%) .NET
18 249 (17.67%) Spring
19 236 (16.75%) SQL
20 229 (16.25%) Banking
21 228 (16.18%) Continuous Integration
22 219 (15.54%) Kubernetes
23 206 (14.62%) Jenkins
24 201 (14.27%) HTML
25 200 (14.19%) AngularJS
26 198 (14.05%) CSS
27 192 (13.63%) Python
28 188 (13.34%) REST
29 180 (12.78%) Node.js
30 174 (12.35%) Pair Programming

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 60 (4.26%) Apache Spark
2 45 (3.19%) Confluence
3 28 (1.99%) Mule
4 27 (1.92%) Elasticsearch
5 26 (1.85%) Red Hat Fuse
6 24 (1.70%) Cloud Foundry
6 24 (1.70%) NServiceBus
7 23 (1.63%) SharePoint
8 20 (1.42%) JBoss
9 17 (1.21%) Apache
10 14 (0.99%) WebSphere
11 10 (0.71%) Oracle Service Bus
11 10 (0.71%) Oracle SOA Suite
11 10 (0.71%) Tomcat
12 8 (0.57%) Apache Airflow
12 8 (0.57%) Apache Solr
12 8 (0.57%) Jetty
13 7 (0.50%) Oracle Coherence
14 6 (0.43%) CMS
14 6 (0.43%) IIS
Applications
1 2 (0.14%) Chatbot
1 2 (0.14%) Microsoft Excel
1 2 (0.14%) Sketch
Business Applications
1 5 (0.35%) Dynamics CRM
2 3 (0.21%) Adobe Campaign
2 3 (0.21%) Magento
2 3 (0.21%) Shopify
3 2 (0.14%) SAP Hybris
4 1 (0.071%) Dynamics AX
4 1 (0.071%) Dynamics NAV
4 1 (0.071%) RMDS
4 1 (0.071%) SAP S/4HANA
4 1 (0.071%) thinkFolio
Cloud Services
1 337 (23.92%) Azure
2 311 (22.07%) AWS
3 87 (6.17%) GCP
4 80 (5.68%) Serverless
5 54 (3.83%) GitHub
6 37 (2.63%) Power Platform
7 34 (2.41%) AWS Lambda
8 32 (2.27%) Cloud Computing
8 32 (2.27%) PaaS
9 25 (1.77%) IaaS
9 25 (1.77%) SaaS
10 24 (1.70%) OpenShift
11 23 (1.63%) Azure Active Directory
12 18 (1.28%) Amazon S3
13 16 (1.14%) Azure Functions
14 14 (0.99%) Logic Apps
14 14 (0.99%) PowerApps
15 13 (0.92%) Amazon SQS
16 12 (0.85%) npm
17 10 (0.71%) Dynamics 365
Communications & Networking
1 29 (2.06%) HTTP
2 11 (0.78%) Internet
2 11 (0.78%) TCP/IP
3 9 (0.64%) DECT
3 9 (0.64%) Wi-Fi
4 7 (0.50%) IPv4
4 7 (0.50%) IPv6
4 7 (0.50%) Multicast
4 7 (0.50%) PPP
4 7 (0.50%) UPnP
5 5 (0.35%) Broadband
5 5 (0.35%) DNS
6 4 (0.28%) DVB
6 4 (0.28%) HTTPS
7 3 (0.21%) DMARC
7 3 (0.21%) LAN
7 3 (0.21%) SMS
7 3 (0.21%) SMTP
7 3 (0.21%) SSL
7 3 (0.21%) WAN
Database & Business Intelligence
1 126 (8.94%) SQL Server
2 115 (8.16%) NoSQL
3 92 (6.53%) MongoDB
4 54 (3.83%) MySQL
4 54 (3.83%) Relational Database
5 53 (3.76%) Hadoop
6 52 (3.69%) PostgreSQL
7 36 (2.56%) Big Data
8 30 (2.13%) Data Warehouse
9 28 (1.99%) Redis
10 22 (1.56%) Power BI
11 21 (1.49%) Apache Cassandra
11 21 (1.49%) BigQuery
12 19 (1.35%) Hazelcast
13 18 (1.28%) Amazon DynamoDB
14 15 (1.06%) Azure SQL Database
14 15 (1.06%) Cloud Spanner
14 15 (1.06%) Cosmos DB
15 14 (0.99%) Bigtable
16 13 (0.92%) SQLite
Development Applications
1 286 (20.30%) Git (software)
2 206 (14.62%) Jenkins
3 130 (9.23%) JIRA
4 95 (6.74%) Maven
5 81 (5.75%) JUnit
5 81 (5.75%) Selenium
6 74 (5.25%) Cucumber
7 56 (3.97%) webpack
8 48 (3.41%) Mockito
9 40 (2.84%) Jasmine
10 39 (2.77%) Octopus Deploy
11 38 (2.70%) Gradle
12 34 (2.41%) TeamCity
13 33 (2.34%) GitLab
14 32 (2.27%) Cypress.io
15 30 (2.13%) Subversion
16 25 (1.77%) Atlassian Bamboo
16 25 (1.77%) Mocha
17 22 (1.56%) Xcode
18 21 (1.49%) gulp
General
1 284 (20.16%) Finance
2 229 (16.25%) Banking
3 141 (10.01%) Front Office
4 100 (7.10%) Investment Banking
5 77 (5.46%) Public Sector
6 39 (2.77%) Telecoms
7 37 (2.63%) Marketing
8 31 (2.20%) Manufacturing
8 31 (2.20%) Retail
9 28 (1.99%) Electronics
10 23 (1.63%) Games
11 12 (0.85%) Financial Institution
12 11 (0.78%) Automotive
13 8 (0.57%) Law
14 5 (0.35%) Advertising
14 5 (0.35%) Publishing
15 4 (0.28%) Retail Banking
16 3 (0.21%) Legal
16 3 (0.21%) Multimedia
17 2 (0.14%) Pharmaceutical
Job Titles
1 990 (70.26%) Developer
2 342 (24.27%) Java Developer
3 204 (14.48%) Senior Developer
4 111 (7.88%) React Developer
5 99 (7.03%) .NET Developer
6 88 (6.25%) C# Developer
7 85 (6.03%) Senior Java Developer
8 74 (5.25%) Software Engineer
9 72 (5.11%) Java Engineer
10 71 (5.04%) Full Stack Developer
11 64 (4.54%) Front End Developer (Client-Side Developer)
12 54 (3.83%) JavaScript Developer
12 54 (3.83%) Python Developer
13 51 (3.62%) AWS Developer
14 48 (3.41%) DevOps Engineer
15 46 (3.26%) Scala Developer
16 45 (3.19%) AWS Engineer
17 42 (2.98%) Integration Developer
18 37 (2.63%) Agile Developer
18 37 (2.63%) Backend Developer
Libraries, Frameworks & Software Standards
1 264 (18.74%) React
2 254 (18.03%) .NET
3 249 (17.67%) Spring
4 201 (14.27%) HTML
5 200 (14.19%) AngularJS
6 198 (14.05%) CSS
7 188 (13.34%) REST
8 180 (12.78%) Node.js
9 168 (11.92%) RESTful
10 134 (9.51%) Redux
10 134 (9.51%) Web Services
11 130 (9.23%) Spring Boot
12 123 (8.73%) HTML5
13 113 (8.02%) Kafka
14 104 (7.38%) .NET Core
15 87 (6.17%) JSON
16 86 (6.10%) GraphQL
17 77 (5.46%) CSS3
18 74 (5.25%) ASP.NET
19 71 (5.04%) XML
Miscellaneous
1 154 (10.93%) Greenfield Project
2 84 (5.96%) User Experience
3 55 (3.90%) Foreign Exchange (FX)
4 50 (3.55%) Analytical Skills
5 40 (2.84%) Data Structures
5 40 (2.84%) Fixed Income
6 35 (2.48%) Algorithms
6 35 (2.48%) Mobile App
6 35 (2.48%) Self-Motivation
7 27 (1.92%) Derivative
8 24 (1.70%) Cloud Native
9 18 (1.28%) Enterprise Software
10 17 (1.21%) Credit Risk
10 17 (1.21%) Equities
10 17 (1.21%) Market Risk
11 14 (0.99%) Public Cloud
12 13 (0.92%) Data Centre
13 12 (0.85%) Grid Computing
14 9 (0.64%) Embedded Systems
14 9 (0.64%) Equity Derivative
Operating Systems
1 138 (9.79%) Linux
2 91 (6.46%) Unix
3 62 (4.40%) Apple iOS
4 59 (4.19%) Android
5 16 (1.14%) Windows
6 11 (0.78%) Mac OS X
7 10 (0.71%) Mac OS
8 9 (0.64%) OpenWrt
9 4 (0.28%) CentOS
9 4 (0.28%) Ubuntu
10 2 (0.14%) tvOS
11 1 (0.071%) Solaris
11 1 (0.071%) Tizen
11 1 (0.071%) webOS
Processes & Methodologies
1 912 (64.73%) Agile Software Development
2 541 (38.40%) BDD
3 383 (27.18%) Microservices
4 371 (26.33%) DevOps
5 290 (20.58%) Scrum
6 277 (19.66%) Software Engineering
7 266 (18.88%) Test Automation
8 228 (16.18%) Continuous Integration
9 174 (12.35%) Pair Programming
10 130 (9.23%) Continuous Delivery
11 113 (8.02%) OO
11 113 (8.02%) Unit Testing
12 106 (7.52%) Problem-Solving
13 94 (6.67%) Multithreading
14 91 (6.46%) Continuous Improvement
15 89 (6.32%) Front End Development
16 86 (6.10%) Fintech
17 85 (6.03%) Kanban
18 83 (5.89%) MVC
19 79 (5.61%) Analytics
Programming Languages
1 617 (43.79%) Java
2 405 (28.74%) JavaScript
3 258 (18.31%) C#
4 236 (16.75%) SQL
5 192 (13.63%) Python
6 154 (10.93%) TypeScript
7 124 (8.80%) Java 8
8 116 (8.23%) Scala
9 110 (7.81%) Kotlin
10 59 (4.19%) C++
11 54 (3.83%) ES6
12 47 (3.34%) Ruby
13 37 (2.63%) PowerShell
14 36 (2.56%) C
15 33 (2.34%) Objective-C
16 32 (2.27%) Apple Swift
16 32 (2.27%) PHP
17 30 (2.13%) Go
18 27 (1.92%) Shell Script
19 23 (1.63%) XPath
Qualifications
1 101 (7.17%) Security Cleared
2 87 (6.17%) SC Cleared
3 66 (4.68%) Degree
4 27 (1.92%) Numerate Degree
5 9 (0.64%) DV Cleared
6 7 (0.50%) AWS Certification
7 5 (0.35%) Computer Science Degree
8 4 (0.28%) BPSS Clearance
9 3 (0.21%) DBS Check
10 1 (0.071%) HNC
10 1 (0.071%) ISEB
10 1 (0.071%) ISTQB
10 1 (0.071%) ISTQB Foundation Certification
10 1 (0.071%) Master's Degree
Quality Assurance & Compliance
1 113 (8.02%) QA
2 9 (0.64%) JTAG
3 5 (0.35%) Data Quality
3 5 (0.35%) GDPR
3 5 (0.35%) WCAG
4 4 (0.28%) MiFID
5 3 (0.21%) PMO
System Software
1 270 (19.16%) Docker
2 20 (1.42%) Active Directory
3 8 (0.57%) Apache ZooKeeper
4 5 (0.35%) HDFS
5 2 (0.14%) KVM
5 2 (0.14%) Platform Symphony
6 1 (0.071%) Virtual Machines
6 1 (0.071%) VMware Infrastructure
6 1 (0.071%) vSphere
Systems Management
1 219 (15.54%) Kubernetes
2 87 (6.17%) Terraform
3 50 (3.55%) Ansible
4 16 (1.14%) Grafana
4 16 (1.14%) Prometheus
5 12 (0.85%) Opscode Chef
6 8 (0.57%) Puppet
7 5 (0.35%) Consul
7 5 (0.35%) Rancher
7 5 (0.35%) Rundeck
8 3 (0.21%) Hadoop YARN
8 3 (0.21%) MIIS
9 2 (0.14%) Ambari
9 2 (0.14%) Docker Swarm
9 2 (0.14%) HP ALM
9 2 (0.14%) Single Sign-On
10 1 (0.071%) Salt
10 1 (0.071%) vRealize
Vendors
1 97 (6.88%) Microsoft
2 64 (4.54%) Oracle
3 55 (3.90%) Google
4 31 (2.20%) SAP
5 24 (1.70%) Atlassian
6 22 (1.56%) Splunk
7 19 (1.35%) Sybase
8 18 (1.28%) IBM
9 12 (0.85%) CA Agile Central
9 12 (0.85%) Dynatrace
10 10 (0.71%) Apple
10 10 (0.71%) CA
10 10 (0.71%) Murex
10 10 (0.71%) WSO2
11 9 (0.64%) Adobe
12 8 (0.57%) AppDynamics
12 8 (0.57%) New Relic
12 8 (0.57%) TIBCO
13 7 (0.50%) hybris
13 7 (0.50%) MuleSoft