Period
to 16 January 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 16 January 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
16 Jan 2019
Same period 2018 Same period 2017
Rank 203 167 175
Rank change year-on-year -36 +8 +21
Contract jobs citing SOLID 52 79 51
As % of all contract IT jobs advertised in the City of London 0.76% 1.12% 0.82%
As % of the Processes & Methodologies category 0.87% 1.25% 0.93%
Number of daily rates quoted 41 71 49
City of London median daily rate £513 £500 £463
Median daily rate % change year-on-year +2.50% +8.11% -2.63%
10th Percentile £450 £406 £319
90th Percentile £619 £588 £541
Central London median daily rate £513 £500 £425
% change year-on-year +2.50% +17.65% -10.53%
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 5,967 6,295 5,511
As % of all contract IT jobs advertised in the City of London 87.75% 89.19% 88.82%
Number of daily rates quoted 4,675 5,020 4,375
City of London median daily rate £513 £500 £475
Median daily rate % change year-on-year +2.50% +5.26% -
10th Percentile £319 £325 £313
90th Percentile £675 £688 £665
Central London median daily rate £513 £500 £475
% change year-on-year +2.50% +5.26% +3.26%
Number of hourly rates quoted 70 61 50
City of London median hourly rate £19.13 £18.70 £21.13
Median hourly rate % change year-on-year +2.27% -11.48% -0.59%
10th Percentile £13.00 £11.81 £13.73
90th Percentile £35.21 £31.50 £55.00
Central London median hourly rate £19.25 £20.50 £19.00
% change year-on-year -6.10% +7.89% -9.52%

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 16 January 2019.

Contractor daily rate histogram for SOLID in the City of London

For the 6 months to 16 January 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 40 (76.92%) Agile Software Development
2 35 (67.31%) C#
3 33 (63.46%) .NET
4 29 (55.77%) TDD
4 29 (55.77%) Microsoft Azure
5 28 (53.85%) Microservices
6 22 (42.31%) JavaScript
7 20 (38.46%) OO
8 18 (34.62%) ASP.NET Web API
9 17 (32.69%) SQL Server
10 15 (28.85%) React
10 15 (28.85%) Amazon AWS
11 14 (26.92%) CSS
12 13 (25.00%) SQL
12 13 (25.00%) MVC
12 13 (25.00%) Scrum
12 13 (25.00%) Team Foundation Server
12 13 (25.00%) RESTful
13 12 (23.08%) Visual Studio Team System
13 12 (23.08%) E-Commerce
13 12 (23.08%) Microsoft
13 12 (23.08%) Git (software)
14 11 (21.15%) REST
14 11 (21.15%) AngularJS
14 11 (21.15%) Octopus Deploy
14 11 (21.15%) Continuous Integration
14 11 (21.15%) Software Engineering
15 10 (19.23%) SOA
15 10 (19.23%) Java
15 10 (19.23%) ASP.NET

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 3 (5.77%) Elasticsearch
2 2 (3.85%) IIS
3 1 (1.92%) CMS
3 1 (1.92%) EPiServer
3 1 (1.92%) NServiceBus
3 1 (1.92%) SharePoint
3 1 (1.92%) Sitecore CMS
Business Applications
1 1 (1.92%) Dynamics CRM
1 1 (1.92%) Eloqua
Cloud Services
1 29 (55.77%) Microsoft Azure
2 15 (28.85%) Amazon AWS
3 8 (15.38%) GitHub
4 6 (11.54%) Amazon SQS
4 6 (11.54%) Google Play
5 3 (5.77%) PaaS
6 2 (3.85%) AWS Lambda
6 2 (3.85%) Azure Functions
6 2 (3.85%) Serverless
7 1 (1.92%) Google Analytics
7 1 (1.92%) npm
Communications & Networking
1 1 (1.92%) SMS
Database & Business Intelligence
1 17 (32.69%) SQL Server
2 7 (13.46%) NoSQL
3 6 (11.54%) Redis
3 6 (11.54%) Relational Database
4 3 (5.77%) Apache Cassandra
4 3 (5.77%) CouchDB
4 3 (5.77%) SQL Server 2005
4 3 (5.77%) SQL Server 2008
4 3 (5.77%) SQL Server 2012
5 2 (3.85%) Azure SQL Database
5 2 (3.85%) MongoDB
5 2 (3.85%) MySQL
5 2 (3.85%) PostgreSQL
6 1 (1.92%) Blockchain
6 1 (1.92%) Couchbase
6 1 (1.92%) InterSystems Cache
6 1 (1.92%) Parquet
Development Applications
1 13 (25.00%) Team Foundation Server
2 12 (23.08%) Git (software)
2 12 (23.08%) Visual Studio Team System
3 11 (21.15%) Octopus Deploy
4 9 (17.31%) Jenkins
5 5 (9.62%) TeamCity
6 4 (7.69%) NUnit
7 3 (5.77%) Android Studio
7 3 (5.77%) Genymotion
7 3 (5.77%) Gradle
7 3 (5.77%) SpecFlow
8 2 (3.85%) SQL Server Management Studio (SSMS)
9 1 (1.92%) Jasmine
9 1 (1.92%) JIRA
9 1 (1.92%) JUnit
9 1 (1.92%) Karma Test Runner
9 1 (1.92%) SonarQube
9 1 (1.92%) Visual Studio
9 1 (1.92%) VSS/SourceSafe
General
1 9 (17.31%) Finance
2 7 (13.46%) Front Office
3 2 (3.85%) Banking
3 2 (3.85%) Retail
4 1 (1.92%) Advertising
4 1 (1.92%) Investment Banking
4 1 (1.92%) Marketing
Job Titles
1 44 (84.62%) Developer
2 18 (34.62%) .NET Developer
3 15 (28.85%) Senior Developer
4 8 (15.38%) C# Developer
5 7 (13.46%) Senior Software Developer
5 7 (13.46%) Software Developer
6 6 (11.54%) C# .NET Developer
7 4 (7.69%) Senior .NET Developer
7 4 (7.69%) Xamarin Developer
8 3 (5.77%) Analyst
8 3 (5.77%) Analyst Developer
8 3 (5.77%) Android Developer
8 3 (5.77%) Senior Xamarin Developer
8 3 (5.77%) Software Engineer
9 2 (3.85%) .NET Developer - Fintech
9 2 (3.85%) Applications Developer
9 2 (3.85%) Java Android Developer
9 2 (3.85%) Java Mobile Developer
9 2 (3.85%) Mobile Applications Developer
9 2 (3.85%) React Developer
Libraries, Frameworks & Software Standards
1 33 (63.46%) .NET
2 18 (34.62%) ASP.NET Web API
3 15 (28.85%) React
4 14 (26.92%) CSS
5 13 (25.00%) RESTful
6 11 (21.15%) AngularJS
6 11 (21.15%) REST
7 10 (19.23%) .NET Core
7 10 (19.23%) ASP.NET
8 8 (15.38%) HTML
8 8 (15.38%) jQuery
9 7 (13.46%) Entity Framework
9 7 (13.46%) JSON
9 7 (13.46%) Web Services
10 6 (11.54%) .NET Framework
10 6 (11.54%) Node.js
10 6 (11.54%) RabbitMQ
11 5 (9.62%) ASP.NET MVC
11 5 (9.62%) Redux
11 5 (9.62%) Twitter Bootstrap
Miscellaneous
1 5 (9.62%) Fintech
1 5 (9.62%) Greenfield Project
2 4 (7.69%) N-Tier
3 2 (3.85%) Analytical Skills
3 2 (3.85%) Mobile App
3 2 (3.85%) Tandem
4 1 (1.92%) Blog
4 1 (1.92%) Cloud Native
4 1 (1.92%) Derivative
4 1 (1.92%) Grid Computing
4 1 (1.92%) Swaptions
4 1 (1.92%) User Experience
Operating Systems
1 8 (15.38%) Android
2 4 (7.69%) Apple iOS
3 3 (5.77%) Windows
Processes & Methodologies
1 40 (76.92%) Agile Software Development
2 29 (55.77%) TDD
3 28 (53.85%) Microservices
4 20 (38.46%) OO
5 13 (25.00%) MVC
5 13 (25.00%) Scrum
6 12 (23.08%) E-Commerce
7 11 (21.15%) Continuous Integration
7 11 (21.15%) Software Engineering
8 10 (19.23%) BDD
8 10 (19.23%) Problem-Solving
8 10 (19.23%) SOA
9 9 (17.31%) Deployment Automation
9 9 (17.31%) Kanban
10 8 (15.38%) Pair Programming
10 8 (15.38%) Unit Testing
11 7 (13.46%) DevOps
12 6 (11.54%) Refactoring
13 5 (9.62%) Business Development
13 5 (9.62%) Don't repeat yourself (DRY)
Programming Languages
1 35 (67.31%) C#
2 22 (42.31%) JavaScript
3 13 (25.00%) SQL
4 10 (19.23%) Java
5 6 (11.54%) T-SQL
6 5 (9.62%) PowerShell
7 4 (7.69%) Kotlin
7 4 (7.69%) Python
8 3 (5.77%) TypeScript
9 2 (3.85%) Go
9 2 (3.85%) Ruby
10 1 (1.92%) C
10 1 (1.92%) ES6
10 1 (1.92%) PHP
10 1 (1.92%) PHP 5
10 1 (1.92%) VB.NET
Qualifications
1 4 (7.69%) Degree
2 1 (1.92%) Microsoft Certification
Quality Assurance & Compliance
1 2 (3.85%) QA
System Software
1 10 (19.23%) Docker
Systems Management
1 7 (13.46%) Kubernetes
Vendors
1 12 (23.08%) Microsoft
2 7 (13.46%) Google
3 4 (7.69%) Apple
3 4 (7.69%) Xamarin
4 2 (3.85%) Atlassian
5 1 (1.92%) Marketo
5 1 (1.92%) Nintex
5 1 (1.92%) Sitecore