Period
to 17 July 2019

The table below looks at the prevalence of the term Data Structures in contract job vacancies advertised in Central London. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Data Structures over the 6 months to 17 July 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
London > Central London
6 months to
17 Jul 2019
Same period 2018 Same period 2017
Rank 175 189 160
Rank change year-on-year +14 -29 +40
Contract jobs citing Data Structures 110 109 100
As % of all contract IT jobs advertised in Central London 1.28% 1.17% 1.31%
As % of the Miscellaneous category 3.78% 2.97% 3.36%
Number of daily rates quoted 78 72 66
Central London median daily rate £575 £500 £475
Median daily rate % change year-on-year +15.00% +5.26% -19.15%
10th Percentile £409 £413 £309
90th Percentile £666 £636 £650
London median daily rate £550 £550 £475
% change year-on-year - +15.79% -
Number of hourly rates quoted 1 0 0
Central London median hourly rate £12.50 - -
London median hourly rate £47.50 £20.50 -
% change year-on-year +131.71% - -

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 Central London with a requirement for generic IT skills.

All Generic IT Skills
Central London
Contract vacancies with a requirement for generic IT skills 2,910 3,666 2,978
As % of all contract IT jobs advertised in Central London 33.77% 39.33% 39.05%
Number of daily rates quoted 2,144 2,774 2,224
Central London median daily rate £525 £520 £500
Median daily rate % change year-on-year +0.96% +4.00% +5.26%
10th Percentile £330 £313 £300
90th Percentile £675 £713 £675
London median daily rate £525 £505 £500
% change year-on-year +3.96% +1.00% +5.82%
Number of hourly rates quoted 54 58 34
Central London median hourly rate £20.75 £20.00 £17.00
Median hourly rate % change year-on-year +3.75% +17.65% -10.53%
10th Percentile £11.25 £13.01 £12.51
90th Percentile £50.61 £44.54 £29.77
London median hourly rate £25.30 £22.72 £22.50
% change year-on-year +11.36% +0.96% +12.50%

Data Structures
Job Vacancy Trend in Central London

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

Job vacancy trend for Data Structures in Central London

Data Structures
Contractor Daily Rate Trend in Central London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Data Structures in Central London.

Contractor daily rate trend for Data Structures in Central London

Data Structures
Contractor Daily Rate Histogram in Central London

The daily rate distribution of IT jobs citing Data Structures in Central London over the 6 months to 17 July 2019.

Contractor daily rate histogram for Data Structures in Central London

Data Structures
Contractor Hourly Rate Trend in Central London

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

Contractor hourly rate trend for Data Structures in Central London

Data Structures
Contract Job Locations in Central London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Data Structures within the Central London region over the 6 months to 17 July 2019. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
City of London +32 82 £575 +21.05% 58
West End of London -7 5 £588 +6.82% 1
City of Westminster -26 4 £600 +14.29%
Kensington and Chelsea - 2 £675 -
Data Structures
London

For the 6 months to 17 July 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 Central London region with a requirement for Data Structures.

1 55 (50.00%) SQL
2 52 (47.27%) Python
2 52 (47.27%) Algorithms
3 46 (41.82%) Agile Software Development
4 42 (38.18%) Java
5 38 (34.55%) Linux
5 38 (34.55%) Finance
6 32 (29.09%) JavaScript
7 31 (28.18%) Data Modelling
8 29 (26.36%) OO
9 27 (24.55%) Amazon AWS
9 27 (24.55%) Big Data
10 26 (23.64%) Git (software)
10 26 (23.64%) Scala
11 25 (22.73%) HTML
12 24 (21.82%) NoSQL
13 22 (20.00%) Oracle
13 22 (20.00%) Apache Spark
14 21 (19.09%) Kafka
15 20 (18.18%) ETL
16 19 (17.27%) Analytical Skills
17 18 (16.36%) SQL Server
17 18 (16.36%) Machine Learning
17 18 (16.36%) REST
17 18 (16.36%) Hadoop
17 18 (16.36%) HTML5
18 17 (15.45%) Continuous Integration
18 17 (15.45%) C++
18 17 (15.45%) TDD
18 17 (15.45%) Data Science

Data Structures
Co-occurring IT Skills in Central 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 22 (20.00%) Apache Spark
2 6 (5.45%) IPython
3 5 (4.55%) Apache
4 3 (2.73%) Elasticsearch
5 2 (1.82%) Apache Airflow
5 2 (1.82%) Confluence
5 2 (1.82%) Luigi
5 2 (1.82%) WebLogic
Applications
1 5 (4.55%) Microsoft Excel
Business Applications
1 8 (7.27%) Oracle Financials
2 1 (0.91%) Teamcenter
Cloud Services
1 27 (24.55%) Amazon AWS
2 13 (11.82%) Google Cloud Platform
3 10 (9.09%) Amazon SageMaker
4 9 (8.18%) Amazon S3
5 8 (7.27%) AWS CloudFormation
6 6 (5.45%) Amazon EC2
6 6 (5.45%) Microsoft Azure
7 5 (4.55%) Amazon CloudWatch
7 5 (4.55%) Amazon Glacier
7 5 (4.55%) Amazon SQS
7 5 (4.55%) AWS CloudTrail
7 5 (4.55%) Cloud Computing
7 5 (4.55%) Power Platform
7 5 (4.55%) Virtual Private Cloud
8 4 (3.64%) Amazon EMR
8 4 (3.64%) SaaS
9 2 (1.82%) AWS CodePipeline
9 2 (1.82%) Datadog
9 2 (1.82%) PaaS
10 1 (0.91%) npm
Communications & Networking
1 2 (1.82%) HTTP
2 1 (0.91%) FTP
Database & Business Intelligence
1 27 (24.55%) Big Data
2 24 (21.82%) NoSQL
3 18 (16.36%) Hadoop
3 18 (16.36%) SQL Server
4 14 (12.73%) Relational Database
5 13 (11.82%) Apache Hive
6 9 (8.18%) Data Warehouse
6 9 (8.18%) MongoDB
7 8 (7.27%) MySQL
7 8 (7.27%) Oracle Reports
8 7 (6.36%) Apache Cassandra
9 5 (4.55%) Amazon RDS
9 5 (4.55%) Power BI
10 4 (3.64%) Data Lake
10 4 (3.64%) SQL Server Integration Services
11 3 (2.73%) HBase
11 3 (2.73%) OLAP
11 3 (2.73%) OLTP
11 3 (2.73%) Oracle OLAP
11 3 (2.73%) SQL Server Analysis Services
Development Applications
1 26 (23.64%) Git (software)
2 12 (10.91%) Jenkins
3 6 (5.45%) Subversion
4 5 (4.55%) Maven
5 4 (3.64%) JUnit
6 2 (1.82%) Grunt
6 2 (1.82%) gulp
6 2 (1.82%) JIRA
6 2 (1.82%) Mockito
7 1 (0.91%) Eclipse
7 1 (0.91%) TeamCity
General
1 38 (34.55%) Finance
2 7 (6.36%) Retail
3 6 (5.45%) Banking
4 5 (4.55%) Investment Banking
5 3 (2.73%) Marketing
6 2 (1.82%) Electronics
6 2 (1.82%) Front Office
6 2 (1.82%) Manufacturing
6 2 (1.82%) Telecoms
7 1 (0.91%) Back Office
7 1 (0.91%) Danish Language
7 1 (0.91%) Spanish Language
Job Titles
1 68 (61.82%) Developer
2 22 (20.00%) Java Developer
3 17 (15.45%) Data Engineer
4 16 (14.55%) Python Developer
5 11 (10.00%) Python Engineer
6 10 (9.09%) Analyst
7 9 (8.18%) Hybris Developer
8 8 (7.27%) Quantitative Developer
9 6 (5.45%) AWS Developer
9 6 (5.45%) SQL Developer
10 5 (4.55%) Accountant
10 5 (4.55%) Full Stack Developer
10 5 (4.55%) Junior
10 5 (4.55%) Junior Developer
11 4 (3.64%) Big Data Developer
11 4 (3.64%) E-Commerce Developer
11 4 (3.64%) Junior Java Developer
12 3 (2.73%) Java E-Commerce Developer
12 3 (2.73%) Scala Developer
12 3 (2.73%) SQL Reporting Analyst
Libraries, Frameworks & Software Standards
1 25 (22.73%) HTML
2 21 (19.09%) Kafka
3 18 (16.36%) HTML5
3 18 (16.36%) REST
4 14 (12.73%) CSS
5 13 (11.82%) Middleware
5 13 (11.82%) Spring
6 12 (10.91%) RESTful
7 11 (10.00%) AngularJS
7 11 (10.00%) React
7 11 (10.00%) SOAP
8 10 (9.09%) JSON
8 10 (9.09%) MLlib
8 10 (9.09%) Play Framework
8 10 (9.09%) PySpark
8 10 (9.09%) scikit-learn
8 10 (9.09%) Web Services
9 9 (8.18%) Node.js
10 8 (7.27%) LAMP
10 8 (7.27%) RabbitMQ
Miscellaneous
1 52 (47.27%) Algorithms
2 19 (17.27%) Analytical Skills
3 10 (9.09%) Hedge funds
4 8 (7.27%) Client/Server
5 4 (3.64%) Greenfield Project
6 3 (2.73%) Self-Motivation
6 3 (2.73%) User Experience
7 2 (1.82%) Analytical Mindset
7 2 (1.82%) Blog
7 2 (1.82%) Mainframe
8 1 (0.91%) Data Protection Act
8 1 (0.91%) Enterprise Software
8 1 (0.91%) Equities
8 1 (0.91%) iPad
8 1 (0.91%) Linux Command Line
8 1 (0.91%) Market Risk
8 1 (0.91%) Reference Data
8 1 (0.91%) Spread Betting
8 1 (0.91%) Video on Demand
Operating Systems
1 38 (34.55%) Linux
2 6 (5.45%) Windows
3 3 (2.73%) Unix
Processes & Methodologies
1 46 (41.82%) Agile Software Development
2 31 (28.18%) Data Modelling
3 29 (26.36%) OO
4 20 (18.18%) ETL
5 18 (16.36%) Machine Learning
6 17 (15.45%) Continuous Integration
6 17 (15.45%) Data Science
6 17 (15.45%) Problem-Solving
6 17 (15.45%) TDD
7 16 (14.55%) Computer Science
8 15 (13.64%) OOD
9 13 (11.82%) Data Transformation
9 13 (11.82%) Open Source
10 12 (10.91%) Analytics
10 12 (10.91%) Artificial Intelligence
10 12 (10.91%) Microservices
11 11 (10.00%) Configuration Management
11 11 (10.00%) Migration
11 11 (10.00%) Technical Architecture
12 10 (9.09%) Software Testing
Programming Languages
1 55 (50.00%) SQL
2 52 (47.27%) Python
3 42 (38.18%) Java
4 32 (29.09%) JavaScript
5 26 (23.64%) Scala
6 17 (15.45%) C++
7 14 (12.73%) Java 8
8 13 (11.82%) Bash Shell
9 11 (10.00%) TypeScript
10 9 (8.18%) ES6
11 8 (7.27%) C#
12 6 (5.45%) Cython
13 5 (4.55%) Clojure
13 5 (4.55%) Groovy
14 3 (2.73%) Go
14 3 (2.73%) Shell Script
15 2 (1.82%) AWK
15 2 (1.82%) sed
16 1 (0.91%) C
16 1 (0.91%) MATLAB
Qualifications
1 12 (10.91%) Degree
2 8 (7.27%) ACCA
3 6 (5.45%) Security Cleared
4 5 (4.55%) Computer Science Degree
4 5 (4.55%) SC Cleared
5 3 (2.73%) CTC Cleared
6 1 (0.91%) PhD
Quality Assurance & Compliance
1 15 (13.64%) Data Quality
2 14 (12.73%) QA
3 1 (0.91%) GDPR
System Software
1 12 (10.91%) Docker
2 3 (2.73%) Apache Flume
2 3 (2.73%) HDFS
3 2 (1.82%) Apache ZooKeeper
3 2 (1.82%) etcd
Systems Management
1 8 (7.27%) Kubernetes
2 6 (5.45%) Ansible
3 3 (2.73%) Hadoop YARN
4 2 (1.82%) Consul
4 2 (1.82%) Kibana
4 2 (1.82%) Terraform
Vendors
1 22 (20.00%) Oracle
2 13 (11.82%) Google
3 9 (8.18%) hybris
4 6 (5.45%) Microsoft
5 4 (3.64%) Teradata
6 3 (2.73%) Cloudera
6 3 (2.73%) Informatica
6 3 (2.73%) SAP
6 3 (2.73%) Talend
7 2 (1.82%) Atlassian
7 2 (1.82%) New Relic
7 2 (1.82%) Salesforce.com
7 2 (1.82%) Sybase
7 2 (1.82%) Tableau
8 1 (0.91%) Salesforce Marketing Cloud
8 1 (0.91%) Zoho