Period
to 17 October 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 17 October 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
17 Oct 2018
Same period 2017 Same period 2016
Rank 31 31 36
Rank change year-on-year 0 +5 +19
Contract jobs citing TDD 84 76 61
As % of all contract IT jobs advertised in Hertfordshire 5.26% 5.07% 4.32%
As % of the Processes & Methodologies category 6.47% 6.16% 5.49%
Number of daily rates quoted 71 81 50
Hertfordshire median daily rate £525 £388 £488
Median daily rate % change year-on-year +35.48% -20.51% +2.63%
10th Percentile £400 £313 £348
90th Percentile £569 £569 £703
East of England median daily rate £525 £488 £450
% change year-on-year +7.69% +8.33% +9.76%
Number of hourly rates quoted 1 0 0
Hertfordshire median hourly rate £42.50 - -
East of England median hourly rate £37.50 £62.50 £36.00
% change year-on-year -40.00% +73.61% -2.86%

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 1,299 1,233 1,112
As % of all contract IT jobs advertised in Hertfordshire 81.34% 82.31% 78.70%
Number of daily rates quoted 765 615 604
Hertfordshire median daily rate £425 £400 £400
Median daily rate % change year-on-year +6.25% - +2.56%
10th Percentile £208 £213 £213
90th Percentile £569 £575 £538
East of England median daily rate £438 £425 £400
% change year-on-year +2.94% +6.25% +3.23%
Number of hourly rates quoted 90 65 60
Hertfordshire median hourly rate £17.50 £16.84 £21.25
Median hourly rate % change year-on-year +3.95% -20.78% +1.19%
10th Percentile £11.18 £12.40 £11.02
90th Percentile £48.25 £45.60 £53.75
East of England median hourly rate £17.50 £31.02 £27.00
% change year-on-year -43.58% +14.87% +5.88%

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 17 October 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 17 October 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 +8 23 £550 +41.94% 6
Welwyn Garden City -3 19 £563 +7.14% 6
Hemel Hempstead +4 13 £400 +11.11% 2
Hitchin - 5 £510 -
St Albans -5 3 £538 +65.38% 11
Stevenage -24 2 - - 2
Hatfield -8 1 £525 -1.87% 2
TDD
East of England

For the 6 months to 17 October 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 71 (84.52%) Agile Software Development
2 45 (53.57%) Java
3 40 (47.62%) Java 8
4 36 (42.86%) C#
5 33 (39.29%) AngularJS
6 31 (36.90%) BDD
6 31 (36.90%) REST
6 31 (36.90%) Microservices
7 29 (34.52%) SQL
8 27 (32.14%) JIRA
8 27 (32.14%) Git (software)
9 25 (29.76%) Continuous Integration
10 24 (28.57%) Test Automation
10 24 (28.57%) Scrum
10 24 (28.57%) MVC
11 23 (27.38%) SOAP
12 22 (26.19%) .NET
12 22 (26.19%) Oracle
12 22 (26.19%) Spring
13 20 (23.81%) SQL Server
14 19 (22.62%) CSS
14 19 (22.62%) Subversion
14 19 (22.62%) Spring Boot
15 18 (21.43%) Web Services
16 17 (20.24%) JavaScript
16 17 (20.24%) PostgreSQL
16 17 (20.24%) Kanban
16 17 (20.24%) Greenfield Project
17 16 (19.05%) Software Engineering
18 15 (17.86%) Refactoring

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 4 (4.76%) Elasticsearch
2 3 (3.57%) NServiceBus
3 1 (1.19%) Confluence
Business Applications
1 1 (1.19%) Oracle Assets
1 1 (1.19%) Oracle Financials
1 1 (1.19%) Oracle General Ledger
1 1 (1.19%) Oracle Payables
1 1 (1.19%) Oracle Receivables
Cloud Services
1 12 (14.29%) Amazon AWS
2 3 (3.57%) Heroku
2 3 (3.57%) Microsoft Azure
3 2 (2.38%) Amazon EC2
3 2 (2.38%) Amazon S3
3 2 (2.38%) Amazon SQS
4 1 (1.19%) GitHub
Communications & Networking
1 3 (3.57%) DNS
1 3 (3.57%) FTP
1 3 (3.57%) HTTP
1 3 (3.57%) SSL
1 3 (3.57%) TCP/IP
2 1 (1.19%) SpaceWire
Database & Business Intelligence
1 20 (23.81%) SQL Server
2 17 (20.24%) PostgreSQL
3 11 (13.10%) SQL Server Reporting Services
4 10 (11.90%) SQL Server Integration Services
5 9 (10.71%) SQL Server 2016
6 8 (9.52%) MongoDB
7 1 (1.19%) Big Data
7 1 (1.19%) Data Warehouse
7 1 (1.19%) MySQL
7 1 (1.19%) Relational Database
7 1 (1.19%) SQL Server 2012
Development Applications
1 27 (32.14%) Git (software)
1 27 (32.14%) JIRA
2 19 (22.62%) Subversion
3 14 (16.67%) Jenkins
4 11 (13.10%) NUnit
4 11 (13.10%) ReSharper
4 11 (13.10%) Visual Studio
5 7 (8.33%) gulp
6 4 (4.76%) Gradle
6 4 (4.76%) Grunt
6 4 (4.76%) IntelliJ
7 3 (3.57%) GitLab
7 3 (3.57%) JUnit
7 3 (3.57%) Spock
8 2 (2.38%) Eclipse
8 2 (2.38%) Eclipse RCP
8 2 (2.38%) Gatling
8 2 (2.38%) Geb
8 2 (2.38%) Maven
8 2 (2.38%) Redmine
General
1 13 (15.48%) Finance
2 7 (8.33%) Retail
3 2 (2.38%) Advertising
4 1 (1.19%) Aerospace
4 1 (1.19%) Avionics
4 1 (1.19%) Games
Job Titles
1 76 (90.48%) Developer
2 42 (50.00%) Java Developer
3 22 (26.19%) Senior Developer
4 20 (23.81%) Senior Java Developer
5 17 (20.24%) .NET Developer
6 15 (17.86%) SQL Developer
7 14 (16.67%) Data Migration Developer
7 14 (16.67%) ETL Developer
7 14 (16.67%) Oracle Developer
7 14 (16.67%) Oracle ETL Developer
7 14 (16.67%) PostgreSQL Developer
7 14 (16.67%) SQL Server Developer
8 12 (14.29%) C# .NET Developer
8 12 (14.29%) C# Developer
9 8 (9.52%) Angular Developer
10 7 (8.33%) Agile Developer
10 7 (8.33%) Agile Java Developer
11 6 (7.14%) ASP.NET Developer
11 6 (7.14%) Backend Developer
11 6 (7.14%) C# ASP.NET Developer
Libraries, Frameworks & Software Standards
1 33 (39.29%) AngularJS
2 31 (36.90%) REST
3 23 (27.38%) SOAP
4 22 (26.19%) .NET
4 22 (26.19%) Spring
5 19 (22.62%) CSS
5 19 (22.62%) Spring Boot
6 18 (21.43%) Web Services
7 15 (17.86%) ASP.NET
8 14 (16.67%) Dropwizard
8 14 (16.67%) XML
9 12 (14.29%) ASP.NET MVC
9 12 (14.29%) HTML
10 11 (13.10%) Velocity
10 11 (13.10%) WCF
11 10 (11.90%) HTML5
12 9 (10.71%) Angular 2
12 9 (10.71%) ASP.NET Web API
12 9 (10.71%) CSS3
12 9 (10.71%) JSON
Miscellaneous
1 17 (20.24%) Greenfield Project
2 14 (16.67%) Reference Data
3 5 (5.95%) Analytical Skills
4 3 (3.57%) Self-Motivation
5 2 (2.38%) Client/Server
6 1 (1.19%) Computer Science
6 1 (1.19%) Fintech
Operating Systems
1 11 (13.10%) Windows
2 4 (4.76%) Linux
Processes & Methodologies
1 71 (84.52%) Agile Software Development
2 31 (36.90%) BDD
2 31 (36.90%) Microservices
3 25 (29.76%) Continuous Integration
4 24 (28.57%) MVC
4 24 (28.57%) Scrum
4 24 (28.57%) Test Automation
5 17 (20.24%) Kanban
6 16 (19.05%) Software Engineering
7 15 (17.86%) Migration
7 15 (17.86%) Refactoring
7 15 (17.86%) SOLID
8 14 (16.67%) Data Mapping
8 14 (16.67%) Data Migration
8 14 (16.67%) ETL
8 14 (16.67%) Scaled Agile Framework
9 13 (15.48%) Continuous Delivery
9 13 (15.48%) DevOps
10 11 (13.10%) Digital Transformation Programme
10 11 (13.10%) E-Commerce
Programming Languages
1 45 (53.57%) Java
2 40 (47.62%) Java 8
3 36 (42.86%) C#
4 29 (34.52%) SQL
5 17 (20.24%) JavaScript
6 14 (16.67%) PL/SQL
7 12 (14.29%) T-SQL
8 6 (7.14%) Groovy
9 4 (4.76%) ES6
9 4 (4.76%) TypeScript
10 2 (2.38%) C
10 2 (2.38%) Scala
11 1 (1.19%) PHP
11 1 (1.19%) Python
Qualifications
1 14 (16.67%) SC Cleared
1 14 (16.67%) Security Cleared
2 1 (1.19%) Computer Science Degree
2 1 (1.19%) Degree
Quality Assurance & Compliance
1 8 (9.52%) QA
2 1 (1.19%) ECSS
2 1 (1.19%) MIL-STD-1553
System Software
1 7 (8.33%) Docker
Systems Management
1 3 (3.57%) Docker Swarm
2 2 (2.38%) Kubernetes
Vendors
1 22 (26.19%) Oracle
2 14 (16.67%) Talend
3 4 (4.76%) Microsoft
3 4 (4.76%) New Relic
4 1 (1.19%) Percona