Period
to 9 December 2018

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 9 December 2018 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
9 Dec 2018
Same period 2017 Same period 2016
Rank 165 140 203
Rank change year-on-year -25 +63 -9
Contract jobs citing Data Structures 97 116 42
As % of all contract IT jobs advertised in the City of London 1.37% 1.62% 0.64%
As % of the Miscellaneous category 3.30% 3.79% 1.58%
Number of daily rates quoted 77 102 28
City of London median daily rate £525 £588 £450
Median daily rate % change year-on-year -10.64% +30.56% -18.18%
10th Percentile £418 £406 £353
90th Percentile £650 £813 £675
Central London median daily rate £525 £575 £500
% change year-on-year -8.70% +15.00% -9.09%
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 2,936 3,060 2,653
As % of all contract IT jobs advertised in the City of London 41.40% 42.83% 40.36%
Number of daily rates quoted 2,278 2,393 2,042
City of London median daily rate £525 £525 £475
Median daily rate % change year-on-year - +10.53% -
10th Percentile £285 £315 £313
90th Percentile £713 £725 £675
Central London median daily rate £525 £525 £475
% change year-on-year - +10.53% -
Number of hourly rates quoted 61 35 31
City of London median hourly rate £19.25 £24.49 £19.00
Median hourly rate % change year-on-year -21.38% +28.87% -3.80%
10th Percentile £13.31 £13.13 £12.89
90th Percentile £33.00 £33.92 £55.00
Central London median hourly rate £19.38 £22.26 £18.45
% change year-on-year -12.95% +20.64% -5.38%

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 9 December 2018.

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 9 December 2018, 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 51 (52.58%) SQL
2 42 (43.30%) OO
3 41 (42.27%) Algorithms
4 40 (41.24%) Finance
5 34 (35.05%) Agile Software Development
6 29 (29.90%) Python
7 24 (24.74%) OOP
8 22 (22.68%) Linux
8 22 (22.68%) Java
8 22 (22.68%) C++
9 21 (21.65%) JavaScript
10 19 (19.59%) CSS
10 19 (19.59%) TDD
11 18 (18.56%) OOD
12 17 (17.53%) Test Automation
12 17 (17.53%) Hedge funds
12 17 (17.53%) User Experience
12 17 (17.53%) Front End Development
13 16 (16.49%) Flask
13 16 (16.49%) HTML
14 15 (15.46%) Data Warehouse
14 15 (15.46%) Client/Server
14 15 (15.46%) Project Management
14 15 (15.46%) NumPy
14 15 (15.46%) BDD
14 15 (15.46%) Cython
14 15 (15.46%) Degree
14 15 (15.46%) Pandas
14 15 (15.46%) IPython
14 15 (15.46%) Automated Trading

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 15 (15.46%) IPython
2 5 (5.15%) Apache Spark
3 2 (2.06%) Confluence
4 1 (1.03%) CMS
4 1 (1.03%) Drupal
4 1 (1.03%) Ethereum
4 1 (1.03%) Jupyter
4 1 (1.03%) OpenStack
4 1 (1.03%) SAS
4 1 (1.03%) WordPress
Applications
1 13 (13.40%) Microsoft Excel
2 2 (2.06%) MS Visio
Business Applications
1 2 (2.06%) Distributed Ledger
1 2 (2.06%) SAP Oil and Gas
2 1 (1.03%) SAP MM
2 1 (1.03%) SAP R/3
Cloud Services
1 12 (12.37%) Amazon AWS
2 11 (11.34%) Microsoft Azure
3 4 (4.12%) GitHub
4 3 (3.09%) OpenShift
5 1 (1.03%) Amazon Kinesis
5 1 (1.03%) AWS CloudFormation
5 1 (1.03%) AWS CodePipeline
5 1 (1.03%) BrowserStack
5 1 (1.03%) Google Cloud Platform
5 1 (1.03%) Sauce Labs
Communications & Networking
1 3 (3.09%) AMQP
1 3 (3.09%) Internet
1 3 (3.09%) MQTT
2 1 (1.03%) HTTP
2 1 (1.03%) HTTPS
2 1 (1.03%) IPFS
Database & Business Intelligence
1 15 (15.46%) Data Warehouse
2 13 (13.40%) NoSQL
3 10 (10.31%) SQL Server
4 9 (9.28%) Power BI
5 8 (8.25%) Redis
6 6 (6.19%) SQL Server 2016
6 6 (6.19%) SQL Server Analysis Services
6 6 (6.19%) SQL Server Integration Services
7 5 (5.15%) Big Data
7 5 (5.15%) BusinessObjects
7 5 (5.15%) PostgreSQL
7 5 (5.15%) Relational Database
8 4 (4.12%) Enterprise Data Warehouse
8 4 (4.12%) Microsoft Analysis Services
8 4 (4.12%) MongoDB
8 4 (4.12%) SQL Server Reporting Services
9 3 (3.09%) Biml
9 3 (3.09%) Blockchain
9 3 (3.09%) RDBMS
10 1 (1.03%) Amazon Aurora
Development Applications
1 13 (13.40%) Git (software)
2 6 (6.19%) Jenkins
2 6 (6.19%) JUnit
2 6 (6.19%) Subversion
2 6 (6.19%) TestNG
3 4 (4.12%) Cucumber
3 4 (4.12%) Jasmine
4 3 (3.09%) GoogleTest
4 3 (3.09%) Grunt
4 3 (3.09%) gulp
4 3 (3.09%) JIRA
5 2 (2.06%) Hudson
5 2 (2.06%) Mocha
5 2 (2.06%) PhantomJS
5 2 (2.06%) PowerDesigner
6 1 (1.03%) ERwin
6 1 (1.03%) Gerrit
6 1 (1.03%) JBehave
6 1 (1.03%) JMeter
6 1 (1.03%) WebDriver
General
1 40 (41.24%) Finance
2 6 (6.19%) Banking
3 4 (4.12%) Investment Banking
3 4 (4.12%) Telecoms
4 1 (1.03%) Front Office
4 1 (1.03%) General Ledger
4 1 (1.03%) Legal
4 1 (1.03%) Manufacturing
4 1 (1.03%) Marketing
4 1 (1.03%) Retail
Job Titles
1 62 (63.92%) Developer
2 18 (18.56%) Python Developer
3 15 (15.46%) Front End Developer (Client-Side Developer)
3 15 (15.46%) Quantitative Developer
4 11 (11.34%) Java Developer
4 11 (11.34%) Lead Developer
5 9 (9.28%) Analyst
6 6 (6.19%) SQL Developer
7 5 (5.15%) Data Engineer
7 5 (5.15%) Python Engineer
7 5 (5.15%) React Developer
7 5 (5.15%) Senior Developer
8 4 (4.12%) Business Analyst
8 4 (4.12%) Business Intelligence Developer
8 4 (4.12%) Coordinator
8 4 (4.12%) Data Analyst
8 4 (4.12%) Programme Coordinator
8 4 (4.12%) Senior Programme Coordinator
8 4 (4.12%) Software Engineer
9 3 (3.09%) C++ Software Engineer
Libraries, Frameworks & Software Standards
1 19 (19.59%) CSS
2 16 (16.49%) Flask
2 16 (16.49%) HTML
3 15 (15.46%) NumPy
3 15 (15.46%) Pandas
4 14 (14.43%) AngularJS
5 13 (13.40%) Sass
6 12 (12.37%) LESS
7 11 (11.34%) HTML5
8 10 (10.31%) XML
9 9 (9.28%) Redux
10 8 (8.25%) CSS3
10 8 (8.25%) RESTful
11 7 (7.22%) React
12 6 (6.19%) Kafka
13 5 (5.15%) JSON
13 5 (5.15%) REST
14 4 (4.12%) .NET
14 4 (4.12%) Jest
14 4 (4.12%) Middleware
Miscellaneous
1 41 (42.27%) Algorithms
2 17 (17.53%) Hedge funds
2 17 (17.53%) User Experience
3 15 (15.46%) Client/Server
4 9 (9.28%) Analytical Skills
5 6 (6.19%) Fintech
5 6 (6.19%) Self-Motivation
6 4 (4.12%) Analytical Mindset
7 3 (3.09%) Data Centre
7 3 (3.09%) Mobile App
8 2 (2.06%) Bitcoin
8 2 (2.06%) Blog
8 2 (2.06%) Foreign Exchange (FX)
8 2 (2.06%) Reinsurance
9 1 (1.03%) Cloud Native
9 1 (1.03%) Fixed Income
9 1 (1.03%) Greenfield Project
9 1 (1.03%) Management Information System
9 1 (1.03%) Private Cloud
9 1 (1.03%) Replication
Operating Systems
1 22 (22.68%) 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 42 (43.30%) OO
2 34 (35.05%) Agile Software Development
3 24 (24.74%) OOP
4 19 (19.59%) TDD
5 18 (18.56%) OOD
6 17 (17.53%) Front End Development
6 17 (17.53%) Test Automation
7 15 (15.46%) Automated Trading
7 15 (15.46%) Backtesting
7 15 (15.46%) BDD
7 15 (15.46%) Project Management
8 14 (14.43%) Business Intelligence
8 14 (14.43%) Computer Science
8 14 (14.43%) Data Management
9 13 (13.40%) Mentoring
10 10 (10.31%) Problem-Solving
10 10 (10.31%) Visualisation
11 9 (9.28%) ETL
12 8 (8.25%) Data Modelling
12 8 (8.25%) Scrum
Programming Languages
1 51 (52.58%) SQL
2 29 (29.90%) Python
3 22 (22.68%) C++
3 22 (22.68%) Java
4 21 (21.65%) JavaScript
5 15 (15.46%) Cython
6 13 (13.40%) TypeScript
7 9 (9.28%) VBA
8 6 (6.19%) C#
8 6 (6.19%) Java 8
8 6 (6.19%) Scala
8 6 (6.19%) T-SQL
9 3 (3.09%) ES6
9 3 (3.09%) Kotlin
9 3 (3.09%) R
10 2 (2.06%) Apple Swift
10 2 (2.06%) Go
10 2 (2.06%) Groovy
10 2 (2.06%) Solidity
10 2 (2.06%) XAML
Qualifications
1 15 (15.46%) Degree
2 3 (3.09%) Computer Science Degree
2 3 (3.09%) Master's Degree
3 2 (2.06%) ACCA
3 2 (2.06%) MCSA
3 2 (2.06%) Microsoft Certification
4 1 (1.03%) DBS Check
Quality Assurance & Compliance
1 11 (11.34%) Data Quality
2 7 (7.22%) QA
3 1 (1.03%) IFRS
System Software
1 7 (7.22%) Docker
2 1 (1.03%) Apache ZooKeeper
2 1 (1.03%) etcd
2 1 (1.03%) Varnish
Systems Management
1 5 (5.15%) Kubernetes
2 3 (3.09%) Ansible
3 2 (2.06%) Consul
4 1 (1.03%) Docker Swarm
4 1 (1.03%) Opscode Chef
4 1 (1.03%) Terraform
Vendors
1 7 (7.22%) Microsoft
2 3 (3.09%) Google
2 3 (3.09%) Oracle
2 3 (3.09%) SAP
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%) Rackspace
4 1 (1.03%) Teradata