The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for Refactoring skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Refactoring over the 3 months to 30 March 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.

Refactoring
London / City of London
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 129 153 186
Rank change year-on-year +24 +33  
Contract jobs citing Refactoring 22 10 10
As % of all contract IT jobs advertised in the City of London 0.71% 0.29% 0.19%
As % of the Processes & Methodologies category 0.83% 0.34% 0.24%
Number of daily rates quoted 20 10 8
Median daily rate £525 £500 £419
Median daily rate % change year-on-year +5.00% +19.40%  
90% offered a daily rate of more than £425 £455 £364
10% offered a daily rate of more than £550 £580 £552
UK excluding London median daily rate £380 £375 £338
% change year-on-year +1.33% +11.11%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - £71.00

Refactoring is in the process and methodology skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in the City of London with a requirement for process and methodology skills.

Contract Process & Methodology Skills
City of London
Contract job vacancies with a requirement for process and methodology skills 2657 2978 4235
As % of all contract IT job vacancies advertised in the City of London 85.65% 87.49% 82.43%
Number of daily rates quoted 2076 2386 3276
Median daily rate £500 £475 £450
Median daily rate % change year-on-year +5.26% +5.55%  
90% offered a daily rate of more than £340 £325 £320
10% offered a daily rate of more than £625 £625 £625
UK excluding London median daily rate £410 £400 £396
% change year-on-year +2.50% +1.01%  
Number of hourly rates quoted 23 29 34
Median hourly rate £16.00 £21.78 £20.45
Median hourly rate % change year-on-year -26.53% +6.52%  
90% offered a hourly rate of more than £13.50 £13.00 £12.50
10% offered a hourly rate of more than £28.35 £47.50 £92.50
UK excluding London median hourly rate £35.75 £38.00 £30.00
% change year-on-year -5.92% +26.66%  

Refactoring
Job Vacancy Trend in the City of London

The job posting trend of jobs advertised in the City of London citing Refactoring as a proportion of all contract or permanent IT jobs with a match in the Processes & Methodologies category.

Job vacancy trend for Refactoring in the City of London

Refactoring
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Refactoring in the City of London.

Contractor daily rate trend for Refactoring in the City of London

Refactoring
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Refactoring in the City of London over the 3 months to 30 March 2017.

Contractor daily rate histogram for Refactoring in the City of London

For the 6 months to 30 March 2017, IT contractor jobs citing Refactoring 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 City of London region with a requirement for Refactoring.

1 31 (86.11%) Agile Software Development
2 30 (83.33%) Java
3 29 (80.56%) TDD
3 29 (80.56%) Scrum
3 29 (80.56%) BDD
4 27 (75.00%) Kanban
5 21 (58.33%) JavaScript
5 21 (58.33%) Continuous Integration
6 19 (52.78%) Git (software)
6 19 (52.78%) CSS
7 18 (50.00%) HTML
8 17 (47.22%) SOA
8 17 (47.22%) HTML5
8 17 (47.22%) AngularJS
8 17 (47.22%) SOLID
9 16 (44.44%) Amazon AWS
9 16 (44.44%) Automated Testing
9 16 (44.44%) Web Services
10 15 (41.67%) Software Engineering
11 14 (38.89%) MVC
11 14 (38.89%) MongoDB
12 13 (36.11%) Scalatra
12 13 (36.11%) New Relic
12 13 (36.11%) Web Application Development
12 13 (36.11%) Domain-Driven Design
12 13 (36.11%) Groovy
12 13 (36.11%) QA
12 13 (36.11%) Pair Programming
12 13 (36.11%) Spring
12 13 (36.11%) Web Development

Refactoring
Co-occurring IT Skills in the City of 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 2 (5.56%) IPython
2 1 (2.78%) WebSphere
Applications
1 1 (2.78%) MS Excel
Cloud Services
1 16 (44.44%) Amazon AWS
2 1 (2.78%) Microsoft Azure
Communications & Networking
1 1 (2.78%) HTTP
Database & Business Intelligence
1 14 (38.89%) MongoDB
2 5 (13.89%) NoSQL
3 3 (8.33%) Couchbase
3 3 (8.33%) SQL Server
4 1 (2.78%) Apache Cassandra
4 1 (2.78%) Azure SQL Database
4 1 (2.78%) Big Data
4 1 (2.78%) Data Lake
4 1 (2.78%) Data Warehouse
4 1 (2.78%) Redis
4 1 (2.78%) SQL Server 2012
4 1 (2.78%) SQL Server 2014
4 1 (2.78%) SQL Server Integration Services
Development Applications
1 19 (52.78%) Git (software)
2 12 (33.33%) IntelliJ
3 10 (27.78%) Grunt
3 10 (27.78%) gulp
4 2 (5.56%) Gradle
4 2 (5.56%) Moq
4 2 (5.56%) MSTest
4 2 (5.56%) NUnit
4 2 (5.56%) Rhino Mocks
5 1 (2.78%) Jenkins
5 1 (2.78%) JIRA
5 1 (2.78%) JUnit
5 1 (2.78%) Maven
5 1 (2.78%) Mockito
5 1 (2.78%) Spock
5 1 (2.78%) TeamCity
General
1 2 (5.56%) Finance
Job Titles
1 33 (91.67%) Developer
2 26 (72.22%) Java Developer
3 13 (36.11%) Full Stack Developer
4 8 (22.22%) Senior Developer
5 7 (19.44%) Agile Developer
5 7 (19.44%) Agile Java Developer
5 7 (19.44%) Senior Java Developer
6 4 (11.11%) E-Commerce Developer
6 4 (11.11%) Java E-Commerce Developer
6 4 (11.11%) JavaScript Developer
6 4 (11.11%) Senior Agile Developer
6 4 (11.11%) Senior Agile Java Developer
6 4 (11.11%) Senior E-Commerce Developer
7 3 (8.33%) AWS Developer
7 3 (8.33%) AWS DevOps
7 3 (8.33%) C# Developer
7 3 (8.33%) Python Developer
8 1 (2.78%) C# .NET Developer
8 1 (2.78%) JavaScript Engineer
8 1 (2.78%) Machine Learning Developer
Libraries, Frameworks & Software Standards
1 19 (52.78%) CSS
2 18 (50.00%) HTML
3 17 (47.22%) AngularJS
3 17 (47.22%) HTML5
4 16 (44.44%) Web Services
5 13 (36.11%) Dropwizard
5 13 (36.11%) Hystrix
5 13 (36.11%) React
5 13 (36.11%) Scalatra
5 13 (36.11%) Spring
6 11 (30.56%) Play Framework
7 5 (13.89%) Node.js
8 4 (11.11%) CSS3
8 4 (11.11%) NumPy
8 4 (11.11%) Pandas
9 3 (8.33%) .NET
9 3 (8.33%) REST
9 3 (8.33%) RxJava
10 2 (5.56%) WCF
10 2 (5.56%) XML
Miscellaneous
1 4 (11.11%) Computer Science
2 2 (5.56%) Analytical Skills
2 2 (5.56%) Derivative
3 1 (2.78%) Life Science
Operating Systems
1 5 (13.89%) Linux
2 1 (2.78%) Unix
Processes & Methodologies
1 31 (86.11%) Agile Software Development
2 29 (80.56%) BDD
2 29 (80.56%) Scrum
2 29 (80.56%) TDD
3 27 (75.00%) Kanban
4 21 (58.33%) Continuous Integration
5 17 (47.22%) SOA
5 17 (47.22%) SOLID
6 16 (44.44%) Automated Testing
7 15 (41.67%) Software Engineering
8 14 (38.89%) MVC
9 13 (36.11%) Domain-Driven Design
9 13 (36.11%) Front End Development
9 13 (36.11%) Pair Programming
9 13 (36.11%) Web Application Development
9 13 (36.11%) Web Development
10 8 (22.22%) E-Commerce
11 6 (16.67%) DevOps
11 6 (16.67%) OO
12 4 (11.11%) Microservices
Programming Languages
1 30 (83.33%) Java
2 21 (58.33%) JavaScript
3 13 (36.11%) Groovy
4 10 (27.78%) SQL
5 5 (13.89%) Python
6 4 (11.11%) Scala
7 3 (8.33%) C#
7 3 (8.33%) C++
8 1 (2.78%) Go
8 1 (2.78%) Korn
8 1 (2.78%) PL/SQL
8 1 (2.78%) Shell Script
8 1 (2.78%) T-SQL
8 1 (2.78%) XPath
Qualifications
1 5 (13.89%) Degree
2 2 (5.56%) CFA
Quality Assurance & Compliance
1 13 (36.11%) QA
System Software
1 1 (2.78%) Apache ZooKeeper
1 1 (2.78%) Docker
Systems Management
1 3 (8.33%) Kubernetes
2 1 (2.78%) Opscode Chef
2 1 (2.78%) Puppet
Vendors
1 13 (36.11%) New Relic
2 2 (5.56%) Bloomberg
3 1 (2.78%) MuleSoft
3 1 (2.78%) Oracle
3 1 (2.78%) Solace