The following table provides summary statistics for contract job vacancies advertised in London with a requirement for Reactive Extensions skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Reactive Extensions 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.

Reactive Extensions (Rx)
England / London
3 months to
30 Mar 2017
Same period 2016 Same period 2015
Rank 368 393 396
Rank change year-on-year +25 +3  
Contract jobs citing Reactive Extensions 32 41 24
As % of all contract IT jobs advertised in London 0.16% 0.18% 0.11%
As % of the Libraries, Frameworks & Software Standards category 0.47% 0.57% 0.37%
Number of daily rates quoted 24 40 18
Median daily rate £550 £623 £575
Median daily rate % change year-on-year -11.64% +8.26%  
90% offered a daily rate of more than £425 £540 £559
10% offered a daily rate of more than £600 £683 £650
UK excluding London median daily rate £450 £475 £344
% change year-on-year -5.26% +38.18%  
Number of hourly rates quoted 0 0 0
Median hourly rate - - -
UK excluding London median hourly rate - - -

Reactive Extensions is in the industry standards, technical specifications and software library and framework skills category. The next table is for comparison with the above and provides summary statistics for all contract job vacancies advertised in London with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
London
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 6838 7197 6469
As % of all contract IT job vacancies advertised in London 34.70% 31.89% 30.20%
Number of daily rates quoted 5104 5408 4685
Median daily rate £475 £450 £425
Median daily rate % change year-on-year +5.55% +5.88%  
90% offered a daily rate of more than £345 £325 £310
10% offered a daily rate of more than £613 £600 £575
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 48 28 27
Median hourly rate £47.50 £50.00 £27.37
Median hourly rate % change year-on-year -5.00% +82.68%  
90% offered a hourly rate of more than £17.01 £21.37 £20.00
10% offered a hourly rate of more than £100.00 £55.00 £55.00
UK excluding London median hourly rate £41.00 £38.00 £36.00
% change year-on-year +7.89% +5.55%  

Reactive Extensions
Job Vacancy Trend in London

The job posting trend of jobs advertised in London citing Reactive Extensions as a proportion of all contract or permanent IT jobs with a match in the Libraries, Frameworks & Software Standards category.

Job vacancy trend for Reactive Extensions in London

Reactive Extensions
Contractor Daily Rate Trend in London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Reactive Extensions in London.

Contractor daily rate trend for Reactive Extensions in London

Reactive Extensions
Contractor Daily Rate Histogram in London

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

Contractor daily rate histogram for Reactive Extensions in London

Reactive Extensions
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Reactive Extensions within the London region over the 3 months to 30 March 2017. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 3 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Last 3 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
City of London +3 4 £525 -15.32%
Reactive Extensions
England

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

1 51 (89.47%) .NET
2 49 (85.96%) C#
3 46 (80.70%) JavaScript
4 42 (73.68%) AngularJS
5 41 (71.93%) React
6 36 (63.16%) WPF
6 36 (63.16%) MVVM
7 34 (59.65%) Finance
8 32 (56.14%) SQL
8 32 (56.14%) ASP.NET Web API
9 30 (52.63%) Agile Software Development
10 29 (50.88%) NancyFx
11 28 (49.12%) NoSQL
12 24 (42.11%) Banking
12 24 (42.11%) Java
13 23 (40.35%) HTML
13 23 (40.35%) ASP.NET
14 22 (38.60%) Front Office
14 22 (38.60%) HTML5
14 22 (38.60%) Git (software)
14 22 (38.60%) SignalR
15 21 (36.84%) WebSockets
15 21 (36.84%) Subversion
16 20 (35.09%) SpecFlow
16 20 (35.09%) BDD
17 19 (33.33%) TDD
17 19 (33.33%) Foreign Exchange (FX)
18 18 (31.58%) Azure SQL Database
18 18 (31.58%) Microsoft Azure
18 18 (31.58%) Fintech

Reactive Extensions
Co-occurring IT Skills in 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 10 (17.54%) Apache Spark
2 4 (7.02%) NServiceBus
3 1 (1.75%) SharePoint
3 1 (1.75%) SharePoint 2013
Applications
1 4 (7.02%) MS Excel
Cloud Services
1 18 (31.58%) Microsoft Azure
Communications & Networking
1 16 (28.07%) AMQP
2 1 (1.75%) TCP/IP
Database & Business Intelligence
1 28 (49.12%) NoSQL
2 18 (31.58%) Azure SQL Database
3 17 (29.82%) SQL Server
4 14 (24.56%) MongoDB
5 11 (19.30%) Relational Database
6 10 (17.54%) Big Data
7 9 (15.79%) Redis
8 1 (1.75%) Oracle Database
8 1 (1.75%) Oracle Database 10g
Development Applications
1 22 (38.60%) Git (software)
2 21 (36.84%) Subversion
3 20 (35.09%) SpecFlow
4 14 (24.56%) NUnit
5 12 (21.05%) Maven
6 11 (19.30%) Gradle
7 10 (17.54%) Mockito
8 1 (1.75%) Rhino Mocks
8 1 (1.75%) Sonatype Nexus
8 1 (1.75%) webpack
General
1 34 (59.65%) Finance
2 24 (42.11%) Banking
3 22 (38.60%) Front Office
4 14 (24.56%) Investment Banking
5 5 (8.77%) Marketing
6 1 (1.75%) Financial Institution
Job Titles
1 55 (96.49%) Developer
2 35 (61.40%) C# Developer
3 17 (29.82%) Angular Developer
3 17 (29.82%) WPF Developer
4 16 (28.07%) C# WPF Developer
5 13 (22.81%) Senior Developer
6 12 (21.05%) .NET Developer
6 12 (21.05%) JavaScript Developer
7 11 (19.30%) C# .NET Developer
8 10 (17.54%) ASP.NET Developer
8 10 (17.54%) C# ASP.NET Developer
9 9 (15.79%) Full Stack Developer
9 9 (15.79%) Java Developer
9 9 (15.79%) Web Developer
10 8 (14.04%) Agile Java Developer
10 8 (14.04%) Applications Developer
10 8 (14.04%) Senior Applications Developer
10 8 (14.04%) Senior Web Applications Developer
10 8 (14.04%) Senior Web Developer
10 8 (14.04%) Web Applications Developer
Libraries, Frameworks & Software Standards
1 51 (89.47%) .NET
2 42 (73.68%) AngularJS
3 41 (71.93%) React
4 36 (63.16%) WPF
5 32 (56.14%) ASP.NET Web API
6 29 (50.88%) NancyFx
7 23 (40.35%) ASP.NET
7 23 (40.35%) HTML
8 22 (38.60%) HTML5
8 22 (38.60%) SignalR
9 21 (36.84%) WebSockets
10 18 (31.58%) Angular 2
11 16 (28.07%) MSMQ
12 14 (24.56%) RESTful
13 12 (21.05%) Redux
14 10 (17.54%) Spring
14 10 (17.54%) Spring Boot
15 9 (15.79%) CSS
16 8 (14.04%) CSS3
16 8 (14.04%) RxJS
Miscellaneous
1 19 (33.33%) Foreign Exchange (FX)
2 18 (31.58%) Fintech
3 10 (17.54%) Virtual Team
4 9 (15.79%) User Experience
5 8 (14.04%) Computer Science
6 4 (7.02%) Hedge funds
7 3 (5.26%) Analytical Skills
8 2 (3.51%) Fixed Income
9 1 (1.75%) Algorithms
9 1 (1.75%) Credit Risk
9 1 (1.75%) Data Structures
9 1 (1.75%) Derivative
9 1 (1.75%) Equity Derivative
Operating Systems
1 1 (1.75%) Unix
Processes & Methodologies
1 36 (63.16%) MVVM
2 30 (52.63%) Agile Software Development
3 20 (35.09%) BDD
4 19 (33.33%) TDD
5 16 (28.07%) Microservices
6 15 (26.32%) Multithreading
7 12 (21.05%) Continuous Improvement
7 12 (21.05%) SDLC
8 11 (19.30%) Pair Programming
8 11 (19.30%) Technical Analysis
9 10 (17.54%) Domain-Driven Design
10 9 (15.79%) Scrum
10 9 (15.79%) Web Development
11 8 (14.04%) Open Source
12 7 (12.28%) CQRS
12 7 (12.28%) OO
13 6 (10.53%) Electronic Trading
13 6 (10.53%) OOD
14 5 (8.77%) Complex Event Processing
14 5 (8.77%) Software Engineering
Programming Languages
1 49 (85.96%) C#
2 46 (80.70%) JavaScript
3 32 (56.14%) SQL
4 24 (42.11%) Java
5 9 (15.79%) TypeScript
6 3 (5.26%) XAML
7 1 (1.75%) ES6
Quality Assurance & Compliance
1 1 (1.75%) QA
Vendors
1 4 (7.02%) Microsoft
2 1 (1.75%) Oracle
London
Real Staffing
Rate: £500 - £565 per day
Posted: 6 days ago