Period
to 20 September 2019

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for SOLID skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited SOLID over the 6 months to 20 September 2019 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.

SOLID Principles
Central London > City of London
6 months to
20 Sep 2019
Same period 2018 Same period 2017
Rank 185 209 164
Rank change year-on-year +24 -45 +32
Contract jobs citing SOLID 51 56 79
As % of all contract IT jobs advertised in the City of London 0.82% 0.80% 1.16%
As % of the Processes & Methodologies category 0.91% 0.92% 1.30%
Number of daily rates quoted 50 51 64
City of London median daily rate £569 £500 £528
Median daily rate % change year-on-year +13.75% -5.21% +17.22%
10th Percentile £413 £408 £413
90th Percentile £725 £650 £588
Central London median daily rate £550 £500 £500
% change year-on-year +10.00% - +11.11%
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

SOLID 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 City of London with a requirement for process or methodology skills.

All Process and Methodology Skills
City of London
Contract vacancies with a requirement for process or methodology skills 5,628 6,096 6,071
As % of all contract IT jobs advertised in the City of London 90.00% 87.22% 89.46%
Number of daily rates quoted 4,400 4,852 4,740
City of London median daily rate £525 £505 £500
Median daily rate % change year-on-year +3.96% +1.00% +5.26%
10th Percentile £338 £331 £325
90th Percentile £675 £687 £675
Central London median daily rate £520 £500 £500
% change year-on-year +4.00% - +5.26%
Number of hourly rates quoted 72 104 58
City of London median hourly rate £19.25 £18.70 £19.35
Median hourly rate % change year-on-year +2.94% -3.36% -3.25%
10th Percentile £11.25 £13.07 £13.17
90th Percentile £53.50 £30.75 £30.98
Central London median hourly rate £19.75 £18.70 £18.70
% change year-on-year +5.61% - -6.50%

SOLID
Job Vacancy Trend in the City of London

Job postings citing SOLID as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for SOLID in the City of London

SOLID
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 SOLID in the City of London.

Contractor daily rate trend for SOLID in the City of London

SOLID
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing SOLID in the City of London over the 6 months to 20 September 2019.

Contractor daily rate histogram for SOLID in the City of London

SOLID
Contract Job Locations in the City of London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing SOLID within the City of London region over the 6 months to 20 September 2019. 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
London Bridge - 1 £425 -
SOLID
Central London

For the 6 months to 20 September 2019, IT contractor jobs citing SOLID 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 City of London region with a requirement for SOLID.

1 38 (74.51%) Agile Software Development
2 35 (68.63%) TDD
3 32 (62.75%) Microservices
4 31 (60.78%) C#
5 26 (50.98%) Scrum
6 23 (45.10%) .NET
6 23 (45.10%) RESTful
7 20 (39.22%) Pair Programming
7 20 (39.22%) BDD
8 19 (37.25%) Kanban
9 18 (35.29%) AngularJS
9 18 (35.29%) Finance
9 18 (35.29%) JavaScript
9 18 (35.29%) React
9 18 (35.29%) DevOps
10 17 (33.33%) Node.js
10 17 (33.33%) AWS
11 16 (31.37%) TypeScript
11 16 (31.37%) ASP.NET
12 15 (29.41%) ASP.NET Web API
13 14 (27.45%) The Twelve-Factor App
13 14 (27.45%) Acceptance Criteria
13 14 (27.45%) Event-Driven Architecture
13 14 (27.45%) Salesforce.com
13 14 (27.45%) CRM
13 14 (27.45%) Domain-Driven Design
14 13 (25.49%) Azure
14 13 (25.49%) Test Automation
14 13 (25.49%) OO
14 13 (25.49%) Greenfield Project

SOLID
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 4 (7.84%) IIS
2 1 (1.96%) CMS
2 1 (1.96%) Umbraco
Cloud Services
1 17 (33.33%) AWS
2 13 (25.49%) Azure
3 3 (5.88%) npm
4 2 (3.92%) Serverless
5 1 (1.96%) Azure Active Directory
5 1 (1.96%) Fastly
5 1 (1.96%) SaaS
5 1 (1.96%) Yarn
Database & Business Intelligence
1 6 (11.76%) MongoDB
1 6 (11.76%) SQL Server
2 3 (5.88%) NoSQL
3 2 (3.92%) SQL Server Integration Services
4 1 (1.96%) SQL Server 2005
4 1 (1.96%) SQL Server 2008
4 1 (1.96%) SQL Server 2012
4 1 (1.96%) SQL Server 2014
Development Applications
1 9 (17.65%) NUnit
2 5 (9.80%) gulp
3 4 (7.84%) Git (software)
3 4 (7.84%) Moq
4 3 (5.88%) Grunt
4 3 (5.88%) IntelliJ
4 3 (5.88%) webpack
5 1 (1.96%) Bower
5 1 (1.96%) Jasmine
5 1 (1.96%) Jenkins
5 1 (1.96%) jspm
5 1 (1.96%) JUnit
5 1 (1.96%) Karma Test Runner
5 1 (1.96%) Maven
5 1 (1.96%) PhantomJS
5 1 (1.96%) SQL Server Management Studio (SSMS)
5 1 (1.96%) Swashbuckle
5 1 (1.96%) TeamCity
General
1 18 (35.29%) Finance
2 8 (15.69%) Back Office
3 6 (11.76%) Front Office
4 4 (7.84%) Banking
5 2 (3.92%) Games
Job Titles
1 45 (88.24%) Developer
2 21 (41.18%) C# Developer
3 10 (19.61%) .NET Developer
3 10 (19.61%) Salesforce Developer
4 7 (13.73%) Full Stack Developer
5 5 (9.80%) C# .NET Developer
5 5 (9.80%) Java Developer
6 4 (7.84%) React Developer
7 3 (5.88%) JavaScript Developer
8 2 (3.92%) Angular Developer
8 2 (3.92%) Azure Developer
8 2 (3.92%) Lead C# Developer
8 2 (3.92%) Lead Developer
8 2 (3.92%) PHP Developer
8 2 (3.92%) Senior Developer
8 2 (3.92%) Senior Full Stack Developer
8 2 (3.92%) SQL Developer
9 1 (1.96%) Junior SQL Developer
9 1 (1.96%) Senior React Developer
9 1 (1.96%) Xamarin Developer
Libraries, Frameworks & Software Standards
1 23 (45.10%) .NET
1 23 (45.10%) RESTful
2 18 (35.29%) AngularJS
2 18 (35.29%) React
3 17 (33.33%) Node.js
4 16 (31.37%) ASP.NET
5 15 (29.41%) ASP.NET Web API
6 10 (19.61%) .NET Core
6 10 (19.61%) Web Services
7 8 (15.69%) .NET Framework
8 7 (13.73%) ASP.NET MVC
8 7 (13.73%) HTML
9 6 (11.76%) CSS
9 6 (11.76%) Entity Framework
10 5 (9.80%) HTML5
10 5 (9.80%) WCF
11 4 (7.84%) Angular 2
11 4 (7.84%) OAuth
11 4 (7.84%) Redux
12 3 (5.88%) Dropwizard
Miscellaneous
1 13 (25.49%) Greenfield Project
2 7 (13.73%) Hedge funds
3 3 (5.88%) Derivative
3 3 (5.88%) Equity Derivative
4 2 (3.92%) Life Science
5 1 (1.96%) Analytical Skills
5 1 (1.96%) Data Structures
5 1 (1.96%) Enterprise Software
5 1 (1.96%) Equities
5 1 (1.96%) User Experience
Operating Systems
1 5 (9.80%) Linux
2 1 (1.96%) Android
2 1 (1.96%) Unix
2 1 (1.96%) Windows
Processes & Methodologies
1 38 (74.51%) Agile Software Development
2 35 (68.63%) TDD
3 32 (62.75%) Microservices
4 26 (50.98%) Scrum
5 20 (39.22%) BDD
5 20 (39.22%) Pair Programming
6 19 (37.25%) Kanban
7 18 (35.29%) DevOps
8 14 (27.45%) Acceptance Criteria
8 14 (27.45%) CRM
8 14 (27.45%) Domain-Driven Design
8 14 (27.45%) Event-Driven Architecture
8 14 (27.45%) The Twelve-Factor App
9 13 (25.49%) OO
9 13 (25.49%) Test Automation
10 12 (23.53%) SDLC
11 11 (21.57%) MVC
12 10 (19.61%) OOP
12 10 (19.61%) Web Application Development
12 10 (19.61%) Web Development
Programming Languages
1 31 (60.78%) C#
2 18 (35.29%) JavaScript
3 16 (31.37%) TypeScript
4 12 (23.53%) Java
5 9 (17.65%) Apex Code
6 8 (15.69%) SQL
7 5 (9.80%) ES6
7 5 (9.80%) Java 8
8 2 (3.92%) PHP
8 2 (3.92%) Python
9 1 (1.96%) C
9 1 (1.96%) T-SQL
Qualifications
1 8 (15.69%) Degree
2 1 (1.96%) Computer Science Degree
2 1 (1.96%) Sun Certification
Quality Assurance & Compliance
1 3 (5.88%) QA
2 1 (1.96%) SLA
System Software
1 6 (11.76%) Docker
2 1 (1.96%) Varnish
Systems Management
1 4 (7.84%) MIIS
2 1 (1.96%) Kubernetes
2 1 (1.96%) Single Sign-On
Vendors
1 14 (27.45%) Salesforce.com
2 5 (9.80%) Microsoft
3 3 (5.88%) New Relic
4 1 (1.96%) Xamarin