Period
to 22 February 2018

The following table provides summary statistics for contract job vacancies advertised in Hertfordshire 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 22 February 2018 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)
East of England > Hertfordshire
6 months to
22 Feb 2018
Same period 2017 Same period 2016
Rank 24 10 44
Rank change year-on-year -14 +34 +4
Contract jobs citing TDD 99 130 50
As % of all contract IT jobs advertised in Hertfordshire 6.43% 9.69% 3.71%
As % of the Processes & Methodologies category 7.88% 12.36% 4.86%
Number of daily rates quoted 77 105 27
Hertfordshire median daily rate £450 £525 £500
Median daily rate % change year-on-year -14.29% +5.00% +21.21%
10th Percentile £356 £353 £361
90th Percentile £557 £595 £650
East of England median daily rate £485 £475 £425
% change year-on-year +2.11% +11.76% +5.92%
Number of hourly rates quoted 0 0 0
Hertfordshire median hourly rate - - -
East of England median hourly rate £62.50 £37.00 £36.98
% change year-on-year +68.92% +0.07% +2.71%

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 Hertfordshire with a requirement for process or methodology skills.

All Process and Methodology Skills
Hertfordshire
Contract vacancies with a requirement for process or methodology skills 1,257 1,052 1,028
As % of all contract IT jobs advertised in Hertfordshire 81.68% 78.39% 76.20%
Number of daily rates quoted 626 593 518
Hertfordshire median daily rate £400 £425 £413
Median daily rate % change year-on-year -5.88% +3.03% +5.77%
10th Percentile £213 £213 £260
90th Percentile £575 £568 £575
East of England median daily rate £425 £400 £410
% change year-on-year +6.25% -2.44% +2.50%
Number of hourly rates quoted 54 56 87
Hertfordshire median hourly rate £23.14 £42.35 £22.00
Median hourly rate % change year-on-year -45.37% +92.50% -32.82%
10th Percentile £12.96 £11.10 £12.28
90th Percentile £47.43 £53.75 £52.25
East of England median hourly rate £35.00 £33.25 £30.00
% change year-on-year +5.26% +10.83% +33.33%

TDD
Job Vacancy Trend in Hertfordshire

Job postings citing TDD as a percentage of all IT jobs advertised in Hertfordshire.

Job vacancy trend for TDD in Hertfordshire

TDD
Contractor Daily Rate Trend in Hertfordshire

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing TDD in Hertfordshire.

Contractor daily rate trend for TDD in Hertfordshire

TDD
Contractor Daily Rate Histogram in Hertfordshire

The daily rate distribution of IT jobs citing TDD in Hertfordshire over the 6 months to 22 February 2018.

Contractor daily rate histogram for TDD in Hertfordshire

TDD
Contractor Hourly Rate Trend in Hertfordshire

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing TDD in Hertfordshire.

Contractor hourly rate trend for TDD in Hertfordshire

TDD
Contract Job Locations in Hertfordshire

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing TDD within the Hertfordshire region over the 6 months to 22 February 2018. 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
Watford +1 28 £425 -19.05% 2
Welwyn Garden City +3 21 £525 -12.50% 1
Stevenage - 8 £388 -
Hemel Hempstead +7 7 £416 +15.63% 8
Hatfield -21 4 £463 -11.90% 1
Rickmansworth -10 1 £525 +54.41% 1
Waltham Cross - 1 £563 -
Cheshunt - 1 £325 -
TDD
East of England

For the 6 months to 22 February 2018, 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 Hertfordshire region with a requirement for TDD.

1 85 (85.86%) Agile Software Development
2 48 (48.48%) BDD
3 45 (45.45%) Java
4 39 (39.39%) Scrum
5 35 (35.35%) Amazon AWS
6 31 (31.31%) Kanban
6 31 (31.31%) Microservices
7 28 (28.28%) JavaScript
8 27 (27.27%) Continuous Integration
9 24 (24.24%) E-Commerce
10 23 (23.23%) Spring
11 21 (21.21%) DevOps
11 21 (21.21%) React
12 20 (20.20%) .NET
13 19 (19.19%) C#
13 19 (19.19%) HTML
13 19 (19.19%) CSS
13 19 (19.19%) MVC
13 19 (19.19%) Node.js
14 18 (18.18%) Pair Programming
15 17 (17.17%) MongoDB
15 17 (17.17%) NoSQL
16 16 (16.16%) Ruby
17 15 (15.15%) Git (software)
18 14 (14.14%) HTML5
18 14 (14.14%) Continuous Delivery
18 14 (14.14%) Kafka
18 14 (14.14%) Analytics
18 14 (14.14%) Web Development
18 14 (14.14%) OO

TDD
Co-occurring IT Skills in Hertfordshire 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 3 (3.03%) Apache Spark
1 3 (3.03%) Elasticsearch
1 3 (3.03%) Oracle SOA Suite
1 3 (3.03%) Tomcat
2 2 (2.02%) Confluence
3 1 (1.01%) Apache
Business Applications
1 2 (2.02%) Magento
Cloud Services
1 35 (35.35%) Amazon AWS
2 11 (11.11%) Google Analytics
2 11 (11.11%) PaaS
3 7 (7.07%) Amazon EC2
3 7 (7.07%) Amazon SQS
4 5 (5.05%) Amazon S3
5 4 (4.04%) GitHub
6 2 (2.02%) Heroku
7 1 (1.01%) Amazon ElastiCache
7 1 (1.01%) AWS CloudFormation
7 1 (1.01%) AWS Elastic Beanstalk
7 1 (1.01%) AWS Lambda
7 1 (1.01%) CloudFront
7 1 (1.01%) Route 53
7 1 (1.01%) Serverless
Communications & Networking
1 5 (5.05%) 3GPP
1 5 (5.05%) LTE
1 5 (5.05%) Wireless
Database & Business Intelligence
1 17 (17.17%) MongoDB
1 17 (17.17%) NoSQL
2 9 (9.09%) SQL Server
3 8 (8.08%) PostgreSQL
4 5 (5.05%) Apache Cassandra
5 4 (4.04%) Amazon DynamoDB
5 4 (4.04%) Redis
6 3 (3.03%) Big Data
6 3 (3.03%) MySQL
6 3 (3.03%) RDBMS
6 3 (3.03%) Relational Database
6 3 (3.03%) SQL Server 2014
6 3 (3.03%) SQL Server Integration Services
6 3 (3.03%) SQL Server Reporting Services
7 1 (1.01%) Amazon RDS
7 1 (1.01%) Couchbase
7 1 (1.01%) DB2
7 1 (1.01%) Oracle Database
Development Applications
1 15 (15.15%) Git (software)
2 11 (11.11%) Grunt
2 11 (11.11%) gulp
3 10 (10.10%) JIRA
4 9 (9.09%) Maven
5 6 (6.06%) IntelliJ
5 6 (6.06%) Jenkins
6 5 (5.05%) Mocha
6 5 (5.05%) webpack
7 4 (4.04%) JUnit
8 3 (3.03%) Cucumber
8 3 (3.03%) Gradle
8 3 (3.03%) Hudson
8 3 (3.03%) Jasmine
8 3 (3.03%) Selenium
8 3 (3.03%) Team Foundation Server
8 3 (3.03%) WebDriver
9 2 (2.02%) JBehave
9 2 (2.02%) Karma Test Runner
9 2 (2.02%) Protractor
General
1 11 (11.11%) Advertising
1 11 (11.11%) Marketing
2 6 (6.06%) Automotive
2 6 (6.06%) Finance
2 6 (6.06%) Retail
2 6 (6.06%) Telecoms
3 2 (2.02%) Law
4 1 (1.01%) Back Office
4 1 (1.01%) Front Office
Job Titles
1 68 (68.69%) Developer
2 39 (39.39%) Java Developer
3 11 (11.11%) Architect
3 11 (11.11%) E-Commerce Architect
3 11 (11.11%) E-Commerce Solution Architect
3 11 (11.11%) Solutions Architect
4 8 (8.08%) AWS Developer
4 8 (8.08%) Ruby Developer
4 8 (8.08%) Senior Developer
4 8 (8.08%) Senior Java Developer
5 7 (7.07%) .NET Developer
5 7 (7.07%) Digital Architect
5 7 (7.07%) Digital Solutions Architect
5 7 (7.07%) Full Stack Developer
5 7 (7.07%) Scrum Master
6 6 (6.06%) C# .NET Developer
6 6 (6.06%) C# Developer
6 6 (6.06%) JavaScript Developer
6 6 (6.06%) Ruby on Rails Developer
7 5 (5.05%) DSP Engineer
Libraries, Frameworks & Software Standards
1 23 (23.23%) Spring
2 21 (21.21%) React
3 20 (20.20%) .NET
4 19 (19.19%) CSS
4 19 (19.19%) HTML
4 19 (19.19%) Node.js
5 14 (14.14%) HTML5
5 14 (14.14%) Kafka
6 13 (13.13%) .NET Core
6 13 (13.13%) AngularJS
6 13 (13.13%) REST
6 13 (13.13%) Ruby on Rails
6 13 (13.13%) Web Services
7 12 (12.12%) RESTful
8 9 (9.09%) Hibernate
8 9 (9.09%) J2EE
8 9 (9.09%) SOAP
8 9 (9.09%) Spring Boot
9 7 (7.07%) jQuery
9 7 (7.07%) JSON
Miscellaneous
1 11 (11.11%) Greenfield Project
2 5 (5.05%) Algorithms
2 5 (5.05%) VHDL
3 4 (4.04%) User Experience
4 3 (3.03%) Driving Licence
4 3 (3.03%) Enterprise Software
4 3 (3.03%) Tandem
5 2 (2.02%) Vector Graphics
6 1 (1.01%) Analytical Skills
6 1 (1.01%) Computer Science
6 1 (1.01%) Linux Command Line
6 1 (1.01%) W3C
Operating Systems
1 4 (4.04%) Linux
1 4 (4.04%) Unix
2 1 (1.01%) Solaris
Processes & Methodologies
1 85 (85.86%) Agile Software Development
2 48 (48.48%) BDD
3 39 (39.39%) Scrum
4 31 (31.31%) Kanban
4 31 (31.31%) Microservices
5 27 (27.27%) Continuous Integration
6 24 (24.24%) E-Commerce
7 21 (21.21%) DevOps
8 19 (19.19%) MVC
9 18 (18.18%) Pair Programming
10 14 (14.14%) Analytics
10 14 (14.14%) Continuous Delivery
10 14 (14.14%) OO
10 14 (14.14%) Web Development
11 12 (12.12%) Test Automation
12 11 (11.11%) Cybersecurity
13 9 (9.09%) SOA
13 9 (9.09%) SOLID
13 9 (9.09%) Web Application Development
14 8 (8.08%) Front End Development
Programming Languages
1 45 (45.45%) Java
2 28 (28.28%) JavaScript
3 19 (19.19%) C#
4 16 (16.16%) Ruby
5 12 (12.12%) Groovy
6 11 (11.11%) SQL
7 9 (9.09%) Scala
8 5 (5.05%) C
8 5 (5.05%) Embedded C
9 4 (4.04%) Python
10 3 (3.03%) PHP
10 3 (3.03%) T-SQL
11 2 (2.02%) ES6
12 1 (1.01%) C++
12 1 (1.01%) GraphQL
12 1 (1.01%) PL/SQL
12 1 (1.01%) Shell Script
Qualifications
1 4 (4.04%) Security Cleared
2 3 (3.03%) SC Cleared
3 1 (1.01%) ISTQB
3 1 (1.01%) ISTQB Foundation Certification
Quality Assurance & Compliance
1 11 (11.11%) QA
System Software
1 12 (12.12%) Docker
Systems Management
1 4 (4.04%) Ansible
Vendors
1 11 (11.11%) Google
2 6 (6.06%) Microsoft
2 6 (6.06%) New Relic
2 6 (6.06%) Oracle
3 3 (3.03%) Atlassian
4 2 (2.02%) hybris
4 2 (2.02%) IBM
5 1 (1.01%) Sonatype
5 1 (1.01%) Zend