Period
to 25 August 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 25 August 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
25 Aug 2019
Same period 2018 Same period 2017
Rank 180 190 169
Rank change year-on-year +10 -21 +25
Contract jobs citing Data Structures 70 67 81
As % of all contract IT jobs advertised in the City of London 1.10% 0.95% 1.21%
As % of the Miscellaneous category 3.32% 2.36% 2.96%
Number of daily rates quoted 56 56 63
City of London median daily rate £575 £500 £525
Median daily rate % change year-on-year +15.00% -4.76% +15.38%
10th Percentile £409 £397 £353
90th Percentile £641 £638 £813
Central London median daily rate £563 £500 £525
% change year-on-year +12.50% -4.76% +5.00%
Number of hourly rates quoted 1 1 0
City of London median hourly rate £12.50 £37.09 -
Median hourly rate % change year-on-year -66.30% - -
Central London median hourly rate £12.50 £37.09 -
% change year-on-year -66.30% - -

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 2,106 2,834 2,734
As % of all contract IT jobs advertised in the City of London 33.23% 40.27% 40.69%
Number of daily rates quoted 1,562 2,167 2,056
City of London median daily rate £525 £525 £525
10th Percentile £325 £313 £313
90th Percentile £688 £722 £688
Central London median daily rate £525 £513 £525
% change year-on-year +2.44% -2.38% +11.11%
Number of hourly rates quoted 44 55 30
City of London median hourly rate £20.92 £19.50 £21.16
Median hourly rate % change year-on-year +7.26% -7.82% +11.34%
10th Percentile £11.25 £13.69 £12.73
90th Percentile £56.20 £37.92 £33.36
Central London median hourly rate £21.00 £19.50 £18.85
% change year-on-year +7.69% +3.45% -0.79%

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 25 August 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

Data Structures
Contract Job Locations in the City of 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 City of London region over the 6 months to 25 August 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
Moorgate +1 10 £575 +27.78%
Data Structures
Central London

For the 6 months to 25 August 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 36 (51.43%) SQL
2 33 (47.14%) Python
3 30 (42.86%) Algorithms
4 26 (37.14%) Data Modelling
5 24 (34.29%) Finance
5 24 (34.29%) Big Data
6 23 (32.86%) Apache Spark
6 23 (32.86%) Java
7 21 (30.00%) AWS
8 20 (28.57%) Data Science
8 20 (28.57%) Agile Software Development
9 19 (27.14%) Hadoop
9 19 (27.14%) Machine Learning
10 16 (22.86%) NoSQL
10 16 (22.86%) Linux
11 15 (21.43%) Scala
12 14 (20.00%) Apache Hive
12 14 (20.00%) Kafka
12 14 (20.00%) OO
12 14 (20.00%) C++
12 14 (20.00%) SQL Server
13 13 (18.57%) ETL
13 13 (18.57%) Degree
13 13 (18.57%) Computer Science
13 13 (18.57%) GCP
14 10 (14.29%) Amazon SageMaker
14 10 (14.29%) scikit-learn
14 10 (14.29%) MLlib
14 10 (14.29%) PySpark
14 10 (14.29%) Google

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 23 (32.86%) Apache Spark
2 4 (5.71%) IPython
3 3 (4.29%) Elasticsearch
4 2 (2.86%) Apache Airflow
4 2 (2.86%) Luigi
5 1 (1.43%) Apache
5 1 (1.43%) Confluence
Applications
1 5 (7.14%) Microsoft Excel
Business Applications
1 4 (5.71%) Oracle Financials
2 2 (2.86%) Oracle Assets
2 2 (2.86%) Oracle Cash Management
2 2 (2.86%) Oracle FAH
2 2 (2.86%) Oracle General Ledger
2 2 (2.86%) Oracle Internet Expenses
2 2 (2.86%) Oracle iProcurement
2 2 (2.86%) Oracle Payables
2 2 (2.86%) Oracle Receivables
2 2 (2.86%) Oracle Subledger Accounting
3 1 (1.43%) Dynamics AX
3 1 (1.43%) Teamcenter
Cloud Services
1 21 (30.00%) AWS
2 13 (18.57%) GCP
3 10 (14.29%) Amazon SageMaker
4 6 (8.57%) Amazon S3
4 6 (8.57%) Azure
5 5 (7.14%) Amazon EMR
5 5 (7.14%) Power Platform
6 4 (5.71%) Cloud Computing
7 3 (4.29%) AWS CloudFormation
8 2 (2.86%) Amazon EC2
8 2 (2.86%) Dynamics 365
9 1 (1.43%) Amazon CloudWatch
9 1 (1.43%) Amazon Glacier
9 1 (1.43%) Amazon SQS
9 1 (1.43%) Azure Data Factory
9 1 (1.43%) npm
9 1 (1.43%) PaaS
9 1 (1.43%) Serverless
9 1 (1.43%) Virtual Private Cloud
9 1 (1.43%) Yarn
Database & Business Intelligence
1 24 (34.29%) Big Data
2 19 (27.14%) Hadoop
3 16 (22.86%) NoSQL
4 14 (20.00%) Apache Hive
4 14 (20.00%) SQL Server
5 10 (14.29%) Data Warehouse
6 5 (7.14%) MongoDB
6 5 (7.14%) Power BI
7 4 (5.71%) Data Lake
7 4 (5.71%) HBase
7 4 (5.71%) Oracle Reports
7 4 (5.71%) Relational Database
7 4 (5.71%) SQL Server Integration Services
8 3 (4.29%) Impala
8 3 (4.29%) Microsoft Analysis Services
8 3 (4.29%) MySQL
8 3 (4.29%) OLAP
8 3 (4.29%) OLTP
8 3 (4.29%) SQL Server Reporting Services
8 3 (4.29%) Sqoop
Development Applications
1 6 (8.57%) Git (software)
2 4 (5.71%) Jenkins
3 3 (4.29%) JUnit
3 3 (4.29%) Maven
4 2 (2.86%) TestNG
5 1 (1.43%) Eclipse
5 1 (1.43%) JIRA
5 1 (1.43%) TeamCity
General
1 24 (34.29%) Finance
2 8 (11.43%) Retail
3 7 (10.00%) Banking
4 4 (5.71%) Investment Banking
5 3 (4.29%) Public Sector
6 2 (2.86%) General Ledger
6 2 (2.86%) International Banking
7 1 (1.43%) Danish Language
7 1 (1.43%) Front Office
7 1 (1.43%) Manufacturing
7 1 (1.43%) Spanish Language
Job Titles
1 31 (44.29%) Developer
2 21 (30.00%) Data Engineer
3 14 (20.00%) Analyst
4 13 (18.57%) Java Developer
5 11 (15.71%) Python Engineer
6 7 (10.00%) Python Developer
7 4 (5.71%) Accountant
7 4 (5.71%) Business Analyst
7 4 (5.71%) Quantitative Developer
8 3 (4.29%) Business Intelligence Analyst
8 3 (4.29%) C# Developer
8 3 (4.29%) Data Business Analyst
8 3 (4.29%) E-Commerce Developer
8 3 (4.29%) Full Stack Developer
8 3 (4.29%) Investment Banking Java Developer
8 3 (4.29%) Java E-Commerce Developer
8 3 (4.29%) Power BI Analyst
8 3 (4.29%) Power BI Developer
8 3 (4.29%) SQL Analyst
8 3 (4.29%) SQL BI Developer
Libraries, Frameworks & Software Standards
1 14 (20.00%) Kafka
2 10 (14.29%) MLlib
2 10 (14.29%) Play Framework
2 10 (14.29%) PySpark
2 10 (14.29%) scikit-learn
3 6 (8.57%) Middleware
4 5 (7.14%) HTML
4 5 (7.14%) NumPy
4 5 (7.14%) Pandas
4 5 (7.14%) React
5 4 (5.71%) Flask
5 4 (5.71%) HTML5
5 4 (5.71%) Spring
6 3 (4.29%) .NET
6 3 (4.29%) LAMP
6 3 (4.29%) REST
6 3 (4.29%) RESTful
6 3 (4.29%) WPF
6 3 (4.29%) XML
7 2 (2.86%) Spark Streaming
Miscellaneous
1 30 (42.86%) Algorithms
2 10 (14.29%) Analytical Skills
3 7 (10.00%) Hedge funds
4 5 (7.14%) Client/Server
5 3 (4.29%) Greenfield Project
5 3 (4.29%) Public Cloud
6 2 (2.86%) Equities
6 2 (2.86%) Self-Motivation
6 2 (2.86%) User Experience
7 1 (1.43%) Blog
7 1 (1.43%) Data Protection Act
7 1 (1.43%) Enterprise Software
7 1 (1.43%) Foreign Exchange (FX)
7 1 (1.43%) Mainframe
7 1 (1.43%) Market Risk
7 1 (1.43%) Reference Data
7 1 (1.43%) Spread Betting
Operating Systems
1 16 (22.86%) Linux
2 3 (4.29%) Unix
Processes & Methodologies
1 26 (37.14%) Data Modelling
2 20 (28.57%) Agile Software Development
2 20 (28.57%) Data Science
3 19 (27.14%) Machine Learning
4 14 (20.00%) OO
5 13 (18.57%) Computer Science
5 13 (18.57%) ETL
6 10 (14.29%) Artificial Intelligence
6 10 (14.29%) Configuration Management
7 9 (12.86%) TDD
8 8 (11.43%) Business Intelligence
8 8 (11.43%) Data Analysis
8 8 (11.43%) Data Transformation
8 8 (11.43%) Problem-Solving
9 7 (10.00%) Analytics
9 7 (10.00%) Test Automation
10 6 (8.57%) Continuous Integration
10 6 (8.57%) DevOps
10 6 (8.57%) Low Latency
11 5 (7.14%) Microservices
Programming Languages
1 36 (51.43%) SQL
2 33 (47.14%) Python
3 23 (32.86%) Java
4 15 (21.43%) Scala
5 14 (20.00%) C++
6 10 (14.29%) JavaScript
7 6 (8.57%) C#
7 6 (8.57%) Java 8
8 4 (5.71%) Cython
9 3 (4.29%) Go
9 3 (4.29%) Shell Script
10 2 (2.86%) AWK
10 2 (2.86%) Bash Shell
10 2 (2.86%) ES6
10 2 (2.86%) sed
10 2 (2.86%) TypeScript
11 1 (1.43%) MATLAB
11 1 (1.43%) R
11 1 (1.43%) T-SQL
11 1 (1.43%) X++
Qualifications
1 13 (18.57%) Degree
2 4 (5.71%) ACCA
2 4 (5.71%) Computer Science Degree
3 1 (1.43%) Master's Degree
3 1 (1.43%) PhD
3 1 (1.43%) SC Cleared
3 1 (1.43%) Security Cleared
Quality Assurance & Compliance
1 8 (11.43%) QA
2 7 (10.00%) Data Quality
3 1 (1.43%) GDPR
System Software
1 3 (4.29%) Apache Flume
1 3 (4.29%) HDFS
2 1 (1.43%) Docker
Systems Management
1 3 (4.29%) Hadoop YARN
2 1 (1.43%) Ansible
2 1 (1.43%) Kubernetes
2 1 (1.43%) Terraform
Vendors
1 10 (14.29%) Google
1 10 (14.29%) Oracle
2 6 (8.57%) Microsoft
3 4 (5.71%) Informatica
3 4 (5.71%) Talend
3 4 (5.71%) Teradata
4 3 (4.29%) Cloudera
4 3 (4.29%) hybris
5 1 (1.43%) Salesforce.com
5 1 (1.43%) Tableau
5 1 (1.43%) Zoho