Period
to 15 February 2019

The table below looks at the prevalence of the term Data Structures in contract job vacancies advertised in the City of London. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Data Structures over the 6 months to 15 February 2019 with a comparison to the same period over 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.

Data Structures
Central London > City of London
6 months to
15 Feb 2019
Same period 2018 Same period 2017
Rank 159 156 184
Rank change year-on-year -3 +28 -5
Contract jobs citing Data Structures 97 105 51
As % of all contract IT jobs advertised in the City of London 1.42% 1.47% 0.83%
As % of the Miscellaneous category 3.51% 3.47% 2.10%
Number of daily rates quoted 69 90 35
City of London median daily rate £550 £575 £450
Median daily rate % change year-on-year -4.35% +27.78% -25.00%
10th Percentile £422 £369 £293
90th Percentile £692 £829 £638
Central London median daily rate £560 £550 £475
% change year-on-year +1.82% +15.79% -20.83%
Number of hourly rates quoted 4 1 0
City of London median hourly rate £37.09 £28.00 -
Median hourly rate % change year-on-year +32.46% - -
Central London median hourly rate £37.09 £28.00 -
% change year-on-year +32.46% - -

Data Structures is in the Generic IT Skills 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 generic IT skills.

All Generic IT Skills
City of London
Contract vacancies with a requirement for generic IT skills 2,764 3,025 2,425
As % of all contract IT jobs advertised in the City of London 40.52% 42.36% 39.32%
Number of daily rates quoted 2,100 2,399 1,853
City of London median daily rate £525 £525 £500
Median daily rate % change year-on-year - +5.00% +5.26%
10th Percentile £285 £319 £313
90th Percentile £700 £725 £675
Central London median daily rate £525 £525 £480
% change year-on-year - +9.38% +1.05%
Number of hourly rates quoted 48 44 28
City of London median hourly rate £18.70 £21.63 £19.00
Median hourly rate % change year-on-year -13.53% +13.82% +2.15%
10th Percentile £12.93 £12.58 £12.99
90th Percentile £37.09 £47.58 £55.00
Central London median hourly rate £18.70 £21.50 £19.00
% change year-on-year -13.02% +13.16% -0.51%

Data Structures
Job Vacancy Trend in the City of London

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

Job vacancy trend for Data Structures in the City of London

Data Structures
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 Data Structures in the City of London.

Contractor daily rate trend for Data Structures in the City of London

Data Structures
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Data Structures in the City of London over the 6 months to 15 February 2019.

Contractor daily rate histogram for Data Structures in the City of London

Data Structures
Contractor Hourly Rate Trend in the City of London

This chart provides the 3-month moving average for contractor hourly rates quoted in IT jobs citing Data Structures in the City of London.

Contractor hourly rate trend for Data Structures in the City of London

For the 6 months to 15 February 2019, IT contractor jobs citing Data Structures 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 Data Structures.

1 59 (60.82%) SQL
2 49 (50.52%) Algorithms
3 46 (47.42%) Finance
4 37 (38.14%) OO
5 32 (32.99%) Python
5 32 (32.99%) Agile Software Development
6 25 (25.77%) Linux
7 22 (22.68%) Problem-Solving
8 21 (21.65%) Hedge funds
8 21 (21.65%) C++
8 21 (21.65%) Java
9 20 (20.62%) JavaScript
9 20 (20.62%) OOD
9 20 (20.62%) Computer Science
9 20 (20.62%) Flask
10 18 (18.56%) Analytical Skills
11 17 (17.53%) Pandas
11 17 (17.53%) NumPy
11 17 (17.53%) Client/Server
12 16 (16.49%) HTML
12 16 (16.49%) Cython
12 16 (16.49%) IPython
12 16 (16.49%) Automated Trading
12 16 (16.49%) Backtesting
13 15 (15.46%) NoSQL
13 15 (15.46%) Degree
13 15 (15.46%) Test Automation
13 15 (15.46%) OOP
14 14 (14.43%) TDD
15 13 (13.40%) Git (software)

Data Structures
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 16 (16.49%) IPython
2 8 (8.25%) Apache Spark
3 4 (4.12%) Confluence
4 2 (2.06%) OpenStack
4 2 (2.06%) WebLogic
5 1 (1.03%) CMS
5 1 (1.03%) Drupal
5 1 (1.03%) Jupyter
5 1 (1.03%) SAS
5 1 (1.03%) WordPress
Applications
1 9 (9.28%) Microsoft Excel
2 2 (2.06%) MS Visio
Business Applications
1 3 (3.09%) Oracle Financials
2 2 (2.06%) SAP Oil and Gas
3 1 (1.03%) SAP MM
3 1 (1.03%) SAP R/3
Cloud Services
1 9 (9.28%) Amazon AWS
1 9 (9.28%) Microsoft Azure
2 3 (3.09%) AWS CodePipeline
3 2 (2.06%) AWS CloudFormation
3 2 (2.06%) Datadog
3 2 (2.06%) Google Cloud Platform
4 1 (1.03%) Amazon Kinesis
4 1 (1.03%) BrowserStack
4 1 (1.03%) GitHub
4 1 (1.03%) Google Analytics
4 1 (1.03%) Lucidchart
4 1 (1.03%) PaaS
4 1 (1.03%) SaaS
4 1 (1.03%) Salesforce Sales Cloud
4 1 (1.03%) Salesforce Service Cloud
4 1 (1.03%) Sauce Labs
Communications & Networking
1 3 (3.09%) HTTP
2 1 (1.03%) FTP
2 1 (1.03%) HTTPS
Database & Business Intelligence
1 15 (15.46%) NoSQL
2 10 (10.31%) Data Warehouse
3 8 (8.25%) Big Data
3 8 (8.25%) Redis
4 7 (7.22%) SQL Server
5 5 (5.15%) BusinessObjects
5 5 (5.15%) PostgreSQL
5 5 (5.15%) Power BI
6 4 (4.12%) Enterprise Data Warehouse
6 4 (4.12%) Relational Database
7 3 (3.09%) Oracle Reports
8 2 (2.06%) Amazon Aurora
8 2 (2.06%) Amazon Redshift
8 2 (2.06%) Biml
8 2 (2.06%) MySQL
8 2 (2.06%) RDBMS
8 2 (2.06%) SQL Server 2016
8 2 (2.06%) SQL Server Analysis Services
8 2 (2.06%) SQL Server Integration Services
8 2 (2.06%) SQL Server Reporting Services
Development Applications
1 13 (13.40%) Git (software)
2 7 (7.22%) JUnit
3 5 (5.15%) Jenkins
3 5 (5.15%) TestNG
4 4 (4.12%) Grunt
4 4 (4.12%) gulp
4 4 (4.12%) JIRA
5 2 (2.06%) Hudson
5 2 (2.06%) Jasmine
5 2 (2.06%) Maven
5 2 (2.06%) Mocha
5 2 (2.06%) Mockito
5 2 (2.06%) PowerDesigner
5 2 (2.06%) Subversion
6 1 (1.03%) Bitbucket
6 1 (1.03%) Cucumber
6 1 (1.03%) Gerrit
6 1 (1.03%) JBehave
6 1 (1.03%) PostCSS
6 1 (1.03%) WebDriver
General
1 46 (47.42%) Finance
2 4 (4.12%) Banking
3 3 (3.09%) Investment Banking
4 2 (2.06%) Marketing
4 2 (2.06%) Retail
5 1 (1.03%) Back Office
5 1 (1.03%) General Ledger
5 1 (1.03%) Legal
5 1 (1.03%) Manufacturing
5 1 (1.03%) Telecoms
Job Titles
1 63 (64.95%) Developer
2 23 (23.71%) Python Developer
3 16 (16.49%) Quantitative Developer
4 8 (8.25%) Analyst
4 8 (8.25%) Java Developer
5 7 (7.22%) Front End Developer (Client-Side Developer)
5 7 (7.22%) Lead Developer
6 6 (6.19%) SQL Developer
7 4 (4.12%) AWS Developer
7 4 (4.12%) Coordinator
7 4 (4.12%) Data Analyst
7 4 (4.12%) Programme Coordinator
7 4 (4.12%) Scala Developer
7 4 (4.12%) Senior Developer
7 4 (4.12%) Senior Programme Coordinator
8 3 (3.09%) Actuary
8 3 (3.09%) Apache Spark Developer
8 3 (3.09%) Data Engineer
8 3 (3.09%) React Developer
8 3 (3.09%) Solutions Analyst
Libraries, Frameworks & Software Standards
1 20 (20.62%) Flask
2 17 (17.53%) NumPy
2 17 (17.53%) Pandas
3 16 (16.49%) HTML
4 11 (11.34%) CSS
4 11 (11.34%) React
5 10 (10.31%) RESTful
6 9 (9.28%) Middleware
7 8 (8.25%) .NET
7 8 (8.25%) AngularJS
8 7 (7.22%) HTML5
8 7 (7.22%) Sass
9 6 (6.19%) LESS
9 6 (6.19%) Redux
10 5 (5.15%) CSS3
10 5 (5.15%) Kafka
11 4 (4.12%) jQuery
11 4 (4.12%) RabbitMQ
11 4 (4.12%) REST
11 4 (4.12%) Spring
Miscellaneous
1 49 (50.52%) Algorithms
2 21 (21.65%) Hedge funds
3 18 (18.56%) Analytical Skills
4 17 (17.53%) Client/Server
5 11 (11.34%) User Experience
6 6 (6.19%) Analytical Mindset
6 6 (6.19%) Self-Motivation
7 4 (4.12%) Fintech
7 4 (4.12%) Greenfield Project
8 2 (2.06%) Blog
8 2 (2.06%) Foreign Exchange (FX)
8 2 (2.06%) Mobile App
8 2 (2.06%) Private Cloud
8 2 (2.06%) Reinsurance
9 1 (1.03%) Cloud Native
9 1 (1.03%) Equities
9 1 (1.03%) Fixed Income
9 1 (1.03%) iPad
9 1 (1.03%) Mainframe
9 1 (1.03%) Management Information System
Operating Systems
1 25 (25.77%) Linux
2 2 (2.06%) Android
2 2 (2.06%) Apple iOS
2 2 (2.06%) Unix
2 2 (2.06%) Windows
Processes & Methodologies
1 37 (38.14%) OO
2 32 (32.99%) Agile Software Development
3 22 (22.68%) Problem-Solving
4 20 (20.62%) Computer Science
4 20 (20.62%) OOD
5 16 (16.49%) Automated Trading
5 16 (16.49%) Backtesting
6 15 (15.46%) OOP
6 15 (15.46%) Test Automation
7 14 (14.43%) TDD
8 13 (13.40%) Continuous Integration
9 11 (11.34%) Data Modelling
10 10 (10.31%) Business Intelligence
10 10 (10.31%) Data Management
10 10 (10.31%) Project Management
11 9 (9.28%) Analytics
11 9 (9.28%) Front End Development
11 9 (9.28%) Software Architecture
12 8 (8.25%) Mentoring
12 8 (8.25%) Unit Testing
Programming Languages
1 59 (60.82%) SQL
2 32 (32.99%) Python
3 21 (21.65%) C++
3 21 (21.65%) Java
4 20 (20.62%) JavaScript
5 16 (16.49%) Cython
6 11 (11.34%) Scala
7 9 (9.28%) C#
8 8 (8.25%) TypeScript
8 8 (8.25%) VBA
9 5 (5.15%) Bash Shell
9 5 (5.15%) Java 8
10 3 (3.09%) ES6
11 2 (2.06%) Apple Swift
11 2 (2.06%) PHP
11 2 (2.06%) R
11 2 (2.06%) T-SQL
11 2 (2.06%) XAML
12 1 (1.03%) Kotlin
12 1 (1.03%) Rust
Qualifications
1 15 (15.46%) Degree
2 5 (5.15%) ACCA
3 2 (2.06%) Computer Science Degree
3 2 (2.06%) Master's Degree
3 2 (2.06%) MCSA
3 2 (2.06%) Microsoft Certification
4 1 (1.03%) DBS Check
Quality Assurance & Compliance
1 13 (13.40%) QA
2 12 (12.37%) Data Quality
3 1 (1.03%) IFRS
System Software
1 8 (8.25%) Docker
2 3 (3.09%) Apache ZooKeeper
2 3 (3.09%) etcd
3 1 (1.03%) Varnish
Systems Management
1 3 (3.09%) Consul
2 2 (2.06%) Kibana
2 2 (2.06%) Terraform
3 1 (1.03%) Kubernetes
Vendors
1 6 (6.19%) Microsoft
1 6 (6.19%) Oracle
2 4 (4.12%) SAP
3 2 (2.06%) Atlassian
3 2 (2.06%) Google
3 2 (2.06%) New Relic
3 2 (2.06%) Rackspace
3 2 (2.06%) Sybase
3 2 (2.06%) Tableau
4 1 (1.03%) CODA
4 1 (1.03%) Cognos
4 1 (1.03%) Cypress Semiconductor
4 1 (1.03%) MicroStrategy
4 1 (1.03%) Perfecto Mobile
4 1 (1.03%) Salesforce Marketing Cloud
4 1 (1.03%) Salesforce.com