Period
to 27 July 2021

The following table provides summary statistics for contract job vacancies advertised in the East of England 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 27 July 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 > East of England
6 months to
27 Jul 2021
Same period 2020 Same period 2019
Rank 48 26 17
Rank change year-on-year -22 -9 +4
Contract jobs citing TDD 90 120 324
As % of all contract jobs advertised in the East of England 4.09% 6.86% 7.49%
As % of the Processes & Methodologies category 4.82% 8.26% 8.76%
Number of daily rates quoted 56 92 203
10th Percentile £384 £401 £363
25th Percentile £450 £425 £411
Median daily rate (50th Percentile) £513 £485 £475
Median % change year-on-year +5.67% +2.11% -9.52%
75th Percentile £550 £538 £525
90th Percentile £613 £561 £550
England median daily rate £550 £525 £525
% change year-on-year +4.76% - +5.00%
Number of hourly rates quoted 2 1 1
10th Percentile £46.78 " "
25th Percentile £49.45 £48.06 £61.41
Median hourly rate £53.90 £48.12 £62.30
Median % change year-on-year +12.01% -22.77% +13.27%
75th Percentile £58.34 £48.17 £63.19
90th Percentile £61.01 " "
England median hourly rate £65.00 £62.00 £42.00
% change year-on-year +4.84% +47.62% -6.67%

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 East of England with a requirement for process or methodology skills.

All Process and Methodology Skills
East of England
Contract vacancies with a requirement for process or methodology skills 1,869 1,452 3,697
As % of all contract IT jobs advertised in the East of England 84.84% 82.97% 85.44%
Number of daily rates quoted 1,082 896 2,193
10th Percentile £158 £255 £281
25th Percentile £300 £363 £366
Median daily rate (50th Percentile) £425 £450 £450
Median % change year-on-year -5.56% - +5.88%
75th Percentile £536 £531 £525
90th Percentile £612 £600 £600
England median daily rate £500 £488 £475
% change year-on-year +2.56% +2.63% +2.70%
Number of hourly rates quoted 229 82 194
10th Percentile £12.25 £13.00 £10.46
25th Percentile £12.50 £14.81 £13.00
Median hourly rate £16.00 £24.70 £17.50
Median % change year-on-year -35.22% +41.14% +1.04%
75th Percentile £32.61 £48.61 £45.00
90th Percentile £50.00 £59.68 £50.00
England median hourly rate £22.72 £24.15 £22.93
% change year-on-year -5.93% +5.31% +11.85%

TDD
Job Vacancy Trend in the East of England

Job postings citing TDD as a proportion of all IT jobs advertised in the East of England.

Job vacancy trend for TDD in the East of England

TDD
Contractor Daily Rate Trend in the East of England

3-month moving average daily rate quoted in jobs citing TDD in the East of England.

Daily rate trend for TDD in the East of England

TDD
Daily Rate Histogram in the East of England

Daily rate distribution for jobs citing TDD in the East of England over the 6 months to 27 July 2021.

Daily rate histogram for TDD in the East of England

TDD
Contractor Hourly Rate Trend in the East of England

3-month moving average hourly rates quoted in jobs citing TDD in the East of England.

Hourly rate trend for TDD in the East of England

TDD
Hourly Rate Histogram in the East of England

Hourly rate distribution of jobs citing TDD in the East of England over the 6 months to 27 July 2021.

Hourly rate histogram for TDD in the East of England

TDD
Contract Job Locations in the East of England

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the East of England region over the 6 months to 27 July 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
Essex -6 39 £513 +4.06% 16
Hertfordshire -6 32 £525 +10.47% 33
Suffolk -9 6 £350 -17.65% 5
Cambridgeshire -23 6 £475 -9.52% 22
Norfolk - 5 - - 1
Bedfordshire -4 2 - - 8
TDD
England

For the 6 months to 27 July 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 East of England region with a requirement for TDD.

1 64 (71.11%) Agile Software Development
2 46 (51.11%) Scrum
3 42 (46.67%) Java
4 41 (45.56%) AWS
5 40 (44.44%) Microservices
6 36 (40.00%) Continuous Integration
6 36 (40.00%) BDD
7 31 (34.44%) Spring
8 28 (31.11%) C#
9 26 (28.89%) DevOps
10 25 (27.78%) Spring Boot
10 25 (27.78%) JIRA
10 25 (27.78%) Test Automation
11 24 (26.67%) Jenkins
11 24 (26.67%) Software Engineering
12 23 (25.56%) MySQL
12 23 (25.56%) Oracle
13 21 (23.33%) Confluence
13 21 (23.33%) Docker
13 21 (23.33%) Java 11
14 20 (22.22%) Java 8
14 20 (22.22%) JavaScript
15 18 (20.00%) Pair Programming
15 18 (20.00%) Kanban
15 18 (20.00%) Terraform
16 17 (18.89%) Social Skills
16 17 (18.89%) Unit Testing
16 17 (18.89%) Azure
17 16 (17.78%) Python
17 16 (17.78%) Ansible

TDD
Co-occurring IT Skills in the East of England 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 21 (23.33%) Confluence
2 3 (3.33%) IBM Domino
3 2 (2.22%) Adobe Experience Manager
3 2 (2.22%) Apache
3 2 (2.22%) Apache Spark
3 2 (2.22%) CMS
3 2 (2.22%) IIS
3 2 (2.22%) OpenStack
4 1 (1.11%) Apache Solr
4 1 (1.11%) CoreMedia CMS
4 1 (1.11%) Sitecore CMS
4 1 (1.11%) WebSphere
Business Applications
1 1 (1.11%) Magento
Cloud Services
1 41 (45.56%) AWS
2 17 (18.89%) Azure
3 14 (15.56%) Serverless
4 10 (11.11%) Amazon ECS
4 10 (11.11%) Amazon EKS
5 6 (6.67%) AWS Lambda
6 5 (5.56%) GCP
7 3 (3.33%) Azure Cosmos DB
7 3 (3.33%) Azure Event Grid
7 3 (3.33%) Azure Functions
7 3 (3.33%) Azure Pipelines
7 3 (3.33%) Azure Service Bus
7 3 (3.33%) GitHub
8 2 (2.22%) Akamai
8 2 (2.22%) Amazon EC2
9 1 (1.11%) BlazeMeter
Communications & Networking
1 3 (3.33%) Broadband
1 3 (3.33%) DECT
1 3 (3.33%) IPv4
1 3 (3.33%) IPv6
1 3 (3.33%) Multicast
1 3 (3.33%) PPP
1 3 (3.33%) UPnP
1 3 (3.33%) Wi-Fi
2 2 (2.22%) HTTP
3 1 (1.11%) TCP/IP
Database & Business Intelligence
1 23 (25.56%) MySQL
2 15 (16.67%) Oracle Database
3 10 (11.11%) Relational Database
4 8 (8.89%) SQL Server
5 2 (2.22%) Apache Cassandra
5 2 (2.22%) MongoDB
5 2 (2.22%) NoSQL
5 2 (2.22%) Parquet
5 2 (2.22%) PostgreSQL
5 2 (2.22%) SQL Server Integration Services
5 2 (2.22%) SQL Server Reporting Services
6 1 (1.11%) Data Warehouse
6 1 (1.11%) Electronic Patient Records
6 1 (1.11%) Microsoft Analysis Services
6 1 (1.11%) Oracle Database 12c
6 1 (1.11%) SQL Server Analysis Services
Development Applications
1 25 (27.78%) JIRA
2 24 (26.67%) Jenkins
3 14 (15.56%) Git (software)
4 9 (10.00%) Maven
5 8 (8.89%) Artifactory
5 8 (8.89%) GitLab
6 5 (5.56%) Checkstyle
6 5 (5.56%) Cucumber
6 5 (5.56%) Selenium
7 3 (3.33%) Bitbucket Server
7 3 (3.33%) GDB
7 3 (3.33%) git-flow
7 3 (3.33%) Postman
8 2 (2.22%) Octopus Deploy
8 2 (2.22%) SoapUI
8 2 (2.22%) SonarQube
8 2 (2.22%) Visual Studio
9 1 (1.11%) Eclipse
9 1 (1.11%) JUnit
9 1 (1.11%) LoadRunner
General
1 17 (18.89%) Social Skills
2 5 (5.56%) Retail
3 3 (3.33%) Analytical Skills
3 3 (3.33%) Public Sector
4 2 (2.22%) Finance
4 2 (2.22%) Manufacturing
5 1 (1.11%) Law
5 1 (1.11%) Pharmaceutical
5 1 (1.11%) Presentation Skills
5 1 (1.11%) Telecoms
Job Titles
1 58 (64.44%) Developer
2 27 (30.00%) Java Developer
3 10 (11.11%) C# Developer
3 10 (11.11%) Software Developer
4 9 (10.00%) DevOps Engineer
4 9 (10.00%) Senior Developer
5 8 (8.89%) .NET Developer
5 8 (8.89%) C# Software Developer
5 8 (8.89%) Software Engineer
6 7 (7.78%) Full Stack Developer
6 7 (7.78%) Platform Engineer
7 6 (6.67%) Development Engineer
7 6 (6.67%) Senior Java Developer
8 5 (5.56%) Architect
8 5 (5.56%) Azure Developer
8 5 (5.56%) Java Engineer
8 5 (5.56%) React Developer
9 4 (4.44%) Software Development Engineer
9 4 (4.44%) Test Engineer
10 3 (3.33%) Embedded C Engineer
Libraries, Frameworks & Software Standards
1 31 (34.44%) Spring
2 25 (27.78%) Spring Boot
3 15 (16.67%) React
4 14 (15.56%) J2SE
5 13 (14.44%) .NET
6 12 (13.33%) HTML
7 11 (12.22%) CSS
8 9 (10.00%) .NET Core
9 8 (8.89%) AngularJS
9 8 (8.89%) ASP.NET Web API
9 8 (8.89%) Kafka
10 7 (7.78%) ASP.NET
10 7 (7.78%) RESTful
11 6 (6.67%) .NET Framework
11 6 (6.67%) Entity Framework
11 6 (6.67%) GraphQL
11 6 (6.67%) Node.js
11 6 (6.67%) RabbitMQ
11 6 (6.67%) Web Services
12 5 (5.56%) REST
Miscellaneous
1 14 (15.56%) Hybrid Cloud
2 5 (5.56%) Self-Motivation
2 5 (5.56%) User Experience
3 4 (4.44%) Public Cloud
4 3 (3.33%) Algorithms
4 3 (3.33%) Data Structures
4 3 (3.33%) Embedded Systems
4 3 (3.33%) Mobile App
4 3 (3.33%) NHS
5 2 (2.22%) Enterprise Software
5 2 (2.22%) Greenfield Project
5 2 (2.22%) N-Tier
6 1 (1.11%) EPoS
6 1 (1.11%) Legacy Systems
6 1 (1.11%) Management Information System
6 1 (1.11%) Vector Graphics
6 1 (1.11%) W3C
Operating Systems
1 13 (14.44%) Linux
2 5 (5.56%) Android
3 3 (3.33%) Apple iOS
3 3 (3.33%) OpenWrt
4 2 (2.22%) Windows
5 1 (1.11%) CentOS
5 1 (1.11%) Ubuntu
Processes & Methodologies
1 64 (71.11%) Agile Software Development
2 46 (51.11%) Scrum
3 40 (44.44%) Microservices
4 36 (40.00%) BDD
4 36 (40.00%) Continuous Integration
5 26 (28.89%) DevOps
6 25 (27.78%) Test Automation
7 24 (26.67%) Software Engineering
8 18 (20.00%) Kanban
8 18 (20.00%) Pair Programming
9 17 (18.89%) Unit Testing
10 14 (15.56%) E-Commerce
10 14 (15.56%) User Stories
11 13 (14.44%) Epics
11 13 (14.44%) Problem-Solving
11 13 (14.44%) Scaled Agile Framework
11 13 (14.44%) Validation
12 11 (12.22%) OO
12 11 (12.22%) SOLID
13 10 (11.11%) OOP
Programming Languages
1 42 (46.67%) Java
2 28 (31.11%) C#
3 21 (23.33%) Java 11
4 20 (22.22%) Java 8
4 20 (22.22%) JavaScript
5 16 (17.78%) Python
6 12 (13.33%) Groovy
7 10 (11.11%) C++
7 10 (11.11%) TypeScript
8 6 (6.67%) Bash Shell
8 6 (6.67%) Kotlin
8 6 (6.67%) Ruby
8 6 (6.67%) SQL
9 5 (5.56%) Scala
10 4 (4.44%) C
10 4 (4.44%) Go
11 3 (3.33%) Shell Script
12 2 (2.22%) T-SQL
12 2 (2.22%) VB
12 2 (2.22%) VBA
Qualifications
1 14 (15.56%) OCPJP
1 14 (15.56%) Sun Certification
2 13 (14.44%) SC Cleared
2 13 (14.44%) Security Cleared
3 3 (3.33%) Degree
Quality Assurance & Compliance
1 5 (5.56%) QA
2 3 (3.33%) JTAG
3 2 (2.22%) Accessibility
System Software
1 21 (23.33%) Docker
2 8 (8.89%) Varnish
3 3 (3.33%) Firmware
4 2 (2.22%) Postfix
Systems Management
1 18 (20.00%) Terraform
2 16 (17.78%) Ansible
3 11 (12.22%) Kubernetes
4 8 (8.89%) Docker Swarm
5 1 (1.11%) HP ALM
Vendors
1 23 (25.56%) Oracle
2 14 (15.56%) Sun
3 6 (6.67%) IBM
4 5 (5.56%) Microsoft
4 5 (5.56%) ServiceNow
5 4 (4.44%) Google
6 3 (3.33%) Xamarin
6 3 (3.33%) Xerox
7 2 (2.22%) Adobe
7 2 (2.22%) Alteryx
7 2 (2.22%) Dynatrace
7 2 (2.22%) Pega
7 2 (2.22%) Sitecore
7 2 (2.22%) Splunk
7 2 (2.22%) WSO2
8 1 (1.11%) Atlassian
8 1 (1.11%) Coveo
8 1 (1.11%) HP
8 1 (1.11%) MuleSoft
8 1 (1.11%) VMware