The following table provides summary statistics for contract job vacancies 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 24 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.

3 months to
24 Mar 2017
Same period 2016 Same period 2015
Reactive Extensions (Rx)
UK
Rank 563 600 595
Rank change year-on-year +37 -5  
Contract jobs citing Reactive Extensions 33 42 26
As % of all contract IT jobs advertised in the UK 0.073% 0.079% 0.049%
As % of the Libraries, Frameworks & Software Standards category 0.23% 0.28% 0.19%
Number of daily rates quoted 25 41 20
Median daily rate £550 £620 £575
Median daily rate % change year-on-year -11.29% +7.82%  
90% offered a daily rate of more than £425 £513 £440
10% offered a daily rate of more than £600 £675 £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 with a requirement for industry standards, technical specifications and software library and framework skills.

Contract Software Library & Framework Skills
UK
Contract job vacancies with a requirement for industry standards, technical specifications and software library and framework skills 14206 14834 13989
As % of all contract IT job vacancies advertised in the UK 31.36% 27.99% 26.58%
Number of daily rates quoted 9854 10283 9074
Median daily rate £425 £400 £388
Median daily rate % change year-on-year +6.25% +3.22%  
90% offered a daily rate of more than £300 £300 £278
10% offered a daily rate of more than £563 £550 £550
UK excluding London median daily rate £375 £363 £350
% change year-on-year +3.44% +3.57%  
Number of hourly rates quoted 183 227 189
Median hourly rate £42.00 £38.75 £35.00
Median hourly rate % change year-on-year +8.38% +10.71%  
90% offered a hourly rate of more than £16.00 £13.80 £20.00
10% offered a hourly rate of more than £55.00 £57.75 £47.15
UK excluding London median hourly rate £40.00 £38.00 £36.00
% change year-on-year +5.26% +5.55%  

Reactive Extensions
Job Vacancy Trend

The job posting trend of jobs advertised 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 the UK

Reactive Extensions
Contractor Daily Rate Trend

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

Contractor daily rate trend for Reactive Extensions in the UK

Reactive Extensions
Contractor Daily Rate Histogram

The daily rate distribution of IT jobs citing Reactive Extensions over the 3 months to 24 March 2017.

Contractor daily rate histogram for Reactive Extensions in the UK

Reactive Extensions
Top 8 Contract Locations

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 UK over the 3 months to 24 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
England +25 33 £550 -11.29% 7
London +18 30 £550 -12.00% 4
City of London -4 4 £525 -15.32%
South East +29 3 £450 -12.19%
Surrey +13 2 £450 -12.19%
Leatherhead - 1 £350 -
Hampshire - 1 - -
Southampton - 1 - -

Reactive Extensions
Top 30 Related IT Skills

For the 6 months to 24 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 with a requirement for Reactive Extensions.

1 50 (87.72%) .NET
2 49 (85.96%) C#
3 46 (80.70%) JavaScript
4 42 (73.68%) AngularJS
5 39 (68.42%) React
6 35 (61.40%) MVVM
6 35 (61.40%) WPF
7 33 (57.89%) Finance
8 32 (56.14%) SQL
8 32 (56.14%) ASP.NET Web API
9 29 (50.88%) Agile Software Development
10 28 (49.12%) NancyFx
11 27 (47.37%) NoSQL
12 23 (40.35%) Banking
12 23 (40.35%) HTML
12 23 (40.35%) ASP.NET
13 22 (38.60%) Java
13 22 (38.60%) SignalR
13 22 (38.60%) HTML5
14 21 (36.84%) Git (software)
15 20 (35.09%) Microsoft Azure
15 20 (35.09%) WebSockets
15 20 (35.09%) Front Office
15 20 (35.09%) TDD
15 20 (35.09%) Subversion
16 19 (33.33%) SpecFlow
16 19 (33.33%) Azure SQL Database
16 19 (33.33%) BDD
17 18 (31.58%) Foreign Exchange (FX)
17 18 (31.58%) SQL Server

Reactive Extensions
Top Related IT Skills 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 9 (15.79%) Apache Spark
2 4 (7.02%) NServiceBus
3 1 (1.75%) IIS
3 1 (1.75%) SharePoint
3 1 (1.75%) SharePoint 2013
Applications
1 4 (7.02%) MS Excel
Cloud Services
1 20 (35.09%) Microsoft Azure
2 1 (1.75%) Amazon AWS
2 1 (1.75%) SaaS
Communications & Networking
1 16 (28.07%) AMQP
2 1 (1.75%) TCP/IP
Database & Business Intelligence
1 27 (47.37%) NoSQL
2 19 (33.33%) Azure SQL Database
3 18 (31.58%) SQL Server
4 12 (21.05%) MongoDB
5 10 (17.54%) Relational Database
6 9 (15.79%) Big Data
6 9 (15.79%) Redis
7 1 (1.75%) Apache Cassandra
7 1 (1.75%) Couchbase
7 1 (1.75%) CouchDB
7 1 (1.75%) Event Store
7 1 (1.75%) Oracle Database
7 1 (1.75%) Oracle Database 10g
7 1 (1.75%) RavenDB
Development Applications
1 21 (36.84%) Git (software)
2 20 (35.09%) Subversion
3 19 (33.33%) SpecFlow
4 13 (22.81%) NUnit
5 11 (19.30%) Maven
6 10 (17.54%) Gradle
7 9 (15.79%) Mockito
8 2 (3.51%) webpack
9 1 (1.75%) Jasmine
9 1 (1.75%) JSUnit
9 1 (1.75%) Karma Test Runner
9 1 (1.75%) Rhino Mocks
9 1 (1.75%) Sonatype Nexus
9 1 (1.75%) TeamCity
General
1 33 (57.89%) Finance
2 23 (40.35%) Banking
3 20 (35.09%) Front Office
4 13 (22.81%) 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%) .NET Developer
6 12 (21.05%) C# .NET Developer
6 12 (21.05%) Senior Developer
7 11 (19.30%) JavaScript Developer
8 10 (17.54%) ASP.NET Developer
8 10 (17.54%) C# ASP.NET Developer
9 9 (15.79%) Azure Developer
9 9 (15.79%) Full Stack Developer
9 9 (15.79%) Java Developer
10 8 (14.04%) Agile C# Developer
10 8 (14.04%) Agile Developer
10 8 (14.04%) Agile Java Developer
10 8 (14.04%) Web Developer
11 7 (12.28%) Applications Developer
11 7 (12.28%) Web Applications Developer
Libraries, Frameworks & Software Standards
1 50 (87.72%) .NET
2 42 (73.68%) AngularJS
3 39 (68.42%) React
4 35 (61.40%) WPF
5 32 (56.14%) ASP.NET Web API
6 28 (49.12%) NancyFx
7 23 (40.35%) ASP.NET
7 23 (40.35%) HTML
8 22 (38.60%) HTML5
8 22 (38.60%) SignalR
9 20 (35.09%) WebSockets
10 18 (31.58%) Angular 2
11 17 (29.82%) MSMQ
12 13 (22.81%) RESTful
13 10 (17.54%) CSS
13 10 (17.54%) Redux
14 9 (15.79%) Spring
14 9 (15.79%) Spring Boot
15 8 (14.04%) .NET Framework
15 8 (14.04%) CSS3
Miscellaneous
1 18 (31.58%) Fintech
1 18 (31.58%) Foreign Exchange (FX)
2 9 (15.79%) User Experience
2 9 (15.79%) Virtual Team
3 7 (12.28%) Computer Science
4 3 (5.26%) Analytical Skills
4 3 (5.26%) Hedge funds
5 2 (3.51%) Fixed Income
6 1 (1.75%) Algorithms
6 1 (1.75%) Credit Risk
6 1 (1.75%) Data Structures
6 1 (1.75%) Derivative
6 1 (1.75%) Equity Derivative
Operating Systems
1 1 (1.75%) Unix
1 1 (1.75%) Windows
1 1 (1.75%) Windows Server
1 1 (1.75%) Windows Server 2012
Processes & Methodologies
1 35 (61.40%) MVVM
2 29 (50.88%) Agile Software Development
3 20 (35.09%) TDD
4 19 (33.33%) BDD
5 16 (28.07%) Microservices
6 14 (24.56%) Multithreading
7 11 (19.30%) Continuous Improvement
7 11 (19.30%) Domain-Driven Design
7 11 (19.30%) SDLC
8 10 (17.54%) Pair Programming
8 10 (17.54%) Scrum
8 10 (17.54%) Technical Analysis
9 8 (14.04%) Web Development
10 7 (12.28%) OO
10 7 (12.28%) Open Source
11 6 (10.53%) CQRS
11 6 (10.53%) Electronic Trading
11 6 (10.53%) OOD
12 5 (8.77%) Complex Event Processing
12 5 (8.77%) Software Engineering
Programming Languages
1 49 (85.96%) C#
2 46 (80.70%) JavaScript
3 32 (56.14%) SQL
4 22 (38.60%) Java
5 9 (15.79%) TypeScript
6 3 (5.26%) XAML
7 1 (1.75%) ES6
7 1 (1.75%) PowerShell
7 1 (1.75%) T-SQL
Quality Assurance & Compliance
1 1 (1.75%) QA
System Software
1 1 (1.75%) Docker
Systems Management
1 1 (1.75%) Opscode Chef
1 1 (1.75%) Puppet
Vendors
1 4 (7.02%) Microsoft
2 1 (1.75%) Oracle
London
Real Staffing
Rate: £500 - £565 per day
Posted: Yesterday