Period
to 22 November 2017

The following table provides summary statistics for contract job vacancies advertised in Guildford 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 November 2017 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)
Surrey > Guildford
6 months to
22 Nov 2017
Same period 2016 Same period 2015
Rank 16 21 24
Rank change year-on-year +5 +3 +19
Contract jobs citing TDD 16 7 9
As % of all contract IT jobs advertised in Guildford 6.90% 3.26% 3.98%
As % of the Processes & Methodologies category 9.36% 4.24% 5.14%
Number of daily rates quoted 12 7 7
Guildford median daily rate £500 £525 £375
Median daily rate % change year-on-year -4.76% +40.00% +25.00%
10th Percentile £431 £470 £300
90th Percentile £513 £575 £425
Surrey median daily rate £500 £444 £413
% change year-on-year +12.68% +7.58% +26.92%
Number of hourly rates quoted 0 0 0
Guildford median hourly rate - - -
Surrey median hourly rate - - £40.00

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 Guildford with a requirement for process or methodology skills.

All Process and Methodology Skills
Guildford
Contract vacancies with a requirement for process or methodology skills 171 165 175
As % of all contract IT jobs advertised in Guildford 73.71% 76.74% 77.43%
Number of daily rates quoted 107 97 96
Guildford median daily rate £408 £375 £356
Median daily rate % change year-on-year +8.67% +5.26% -5.00%
10th Percentile £200 £144 £264
90th Percentile £580 £568 £500
Surrey median daily rate £450 £425 £400
% change year-on-year +5.88% +6.25% +6.67%
Number of hourly rates quoted 16 16 5
Guildford median hourly rate £16.50 £26.00 £37.50
Median hourly rate % change year-on-year -36.54% -30.67% +150.00%
10th Percentile £11.88 £10.75 £21.08
90th Percentile £39.75 £44.25 £40.00
Surrey median hourly rate £30.00 £27.50 £32.50
% change year-on-year +9.09% -15.38% +5.69%

TDD
Job Vacancy Trend in Guildford

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

Job vacancy trend for TDD in Guildford

TDD
Contractor Daily Rate Trend in Guildford

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

Contractor daily rate trend for TDD in Guildford

For the 6 months to 22 November 2017, IT contractor jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the number co-occurrences and its proportion to all contract ads across the Guildford region with a requirement for TDD.

1 15 (93.75%) Agile Software Development
2 13 (81.25%) Java
2 13 (81.25%) REST
3 11 (68.75%) Spring
3 11 (68.75%) JSON
4 10 (62.50%) Finance
4 10 (62.50%) J2EE
4 10 (62.50%) Unix
4 10 (62.50%) Linux
4 10 (62.50%) Apache
4 10 (62.50%) Middleware
4 10 (62.50%) RabbitMQ
4 10 (62.50%) Apache ZooKeeper
4 10 (62.50%) Big Data
4 10 (62.50%) Kafka
4 10 (62.50%) Hadoop
4 10 (62.50%) BDD
4 10 (62.50%) Jenkins
4 10 (62.50%) Apache Spark
4 10 (62.50%) Hadoop YARN
4 10 (62.50%) Spring Boot
5 9 (56.25%) Unit Testing
5 9 (56.25%) System Testing
6 8 (50.00%) RESTful
7 4 (25.00%) C#
8 3 (18.75%) ASP.NET
8 3 (18.75%) SQL
8 3 (18.75%) .NET
8 3 (18.75%) NHibernate
8 3 (18.75%) SaaS

TDD
Co-occurring IT Skills in Guildford 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 10 (62.50%) Apache
1 10 (62.50%) Apache Spark
Cloud Services
1 3 (18.75%) SaaS
Database & Business Intelligence
1 10 (62.50%) Big Data
1 10 (62.50%) Hadoop
Development Applications
1 10 (62.50%) Jenkins
2 1 (6.25%) Git (software)
2 1 (6.25%) Mercurial
2 1 (6.25%) Mocha
2 1 (6.25%) Sinon.JS
2 1 (6.25%) Subversion
General
1 10 (62.50%) Finance
Job Titles
1 16 (100.00%) Developer
2 12 (75.00%) Java Developer
3 4 (25.00%) C# Developer
4 3 (18.75%) .NET Developer
4 3 (18.75%) ASP.NET Developer
4 3 (18.75%) C# .NET Developer
4 3 (18.75%) C# ASP.NET Developer
5 1 (6.25%) Android Developer
5 1 (6.25%) Developer in Test
5 1 (6.25%) Hadoop Developer
5 1 (6.25%) iOS Android Developer
5 1 (6.25%) iOS Developer
5 1 (6.25%) Java Android Developer
5 1 (6.25%) Java Hadoop Developer
5 1 (6.25%) Java Mobile Developer
5 1 (6.25%) Mobile Developer
5 1 (6.25%) Objective-C Developer
5 1 (6.25%) Senior C# Developer
5 1 (6.25%) Senior Developer
Libraries, Frameworks & Software Standards
1 13 (81.25%) REST
2 11 (68.75%) JSON
2 11 (68.75%) Spring
3 10 (62.50%) J2EE
3 10 (62.50%) Kafka
3 10 (62.50%) Middleware
3 10 (62.50%) RabbitMQ
3 10 (62.50%) Spring Boot
4 8 (50.00%) RESTful
5 3 (18.75%) .NET
5 3 (18.75%) ASP.NET
5 3 (18.75%) ASP.NET Web API
5 3 (18.75%) KnockoutJS
5 3 (18.75%) NHibernate
6 1 (6.25%) Akka
6 1 (6.25%) Chai
6 1 (6.25%) CSS
6 1 (6.25%) HTML
6 1 (6.25%) React
6 1 (6.25%) Web Services
Miscellaneous
1 1 (6.25%) Mobile App
1 1 (6.25%) User Experience
Operating Systems
1 10 (62.50%) Linux
1 10 (62.50%) Unix
2 1 (6.25%) Android
2 1 (6.25%) Apple iOS
Processes & Methodologies
1 15 (93.75%) Agile Software Development
2 10 (62.50%) BDD
3 9 (56.25%) System Testing
3 9 (56.25%) Unit Testing
4 3 (18.75%) MVC
4 3 (18.75%) SOLID
5 1 (6.25%) Android Development
5 1 (6.25%) iOS Development
5 1 (6.25%) Mobile Development
5 1 (6.25%) SDET
5 1 (6.25%) Test Automation
Programming Languages
1 13 (81.25%) Java
2 4 (25.00%) C#
3 3 (18.75%) SQL
4 2 (12.50%) JavaScript
5 1 (6.25%) Apple Swift
5 1 (6.25%) Objective-C
System Software
1 10 (62.50%) Apache ZooKeeper
2 1 (6.25%) HDFS
Systems Management
1 10 (62.50%) Hadoop YARN