Period
to 13 November 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 13 November 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
13 Nov 2019
Same period 2018 Same period 2017
Rank 161 169 148
Rank change year-on-year +8 -21 +51
Contract jobs citing Data Structures 60 87 114
As % of all contract IT jobs advertised in the City of London 1.01% 1.24% 1.61%
As % of the Miscellaneous category 3.19% 3.11% 3.79%
Number of daily rates quoted 48 69 97
City of London median daily rate £575 £525 £565
Median daily rate % change year-on-year +9.52% -7.08% +25.56%
10th Percentile £410 £421 £394
90th Percentile £700 £650 £813
Central London median daily rate £550 £525 £558
% change year-on-year +4.76% -5.83% +10.40%
Number of hourly rates quoted 1 4 1
City of London median hourly rate £12.50 £37.09 £28.00
Median hourly rate % change year-on-year -66.30% +32.46% -
10th Percentile £11.75 £37.09 £26.00
90th Percentile £13.25 £40.66 £30.00
Central London median hourly rate £12.50 £37.09 £28.00
% change year-on-year -66.30% +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 1,880 2,800 3,005
As % of all contract IT jobs advertised in the City of London 31.75% 39.87% 42.39%
Number of daily rates quoted 1,429 2,178 2,317
City of London median daily rate £525 £525 £525
10th Percentile £300 £298 £315
90th Percentile £700 £713 £713
Central London median daily rate £525 £525 £525
Number of hourly rates quoted 28 60 37
City of London median hourly rate £20.92 £19.75 £22.02
Median hourly rate % change year-on-year +5.90% -10.29% +15.87%
10th Percentile £12.53 £13.31 £12.90
90th Percentile £51.55 £37.09 £33.25
Central London median hourly rate £21.00 £19.50 £20.85
% change year-on-year +7.69% -6.47% +20.00%

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 13 November 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 13 November 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 - 7 £575 -
Data Structures
Central London

For the 6 months to 13 November 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 33 (55.00%) Agile Software Development
2 32 (53.33%) Java
3 31 (51.67%) SQL
4 27 (45.00%) Python
5 24 (40.00%) Algorithms
6 22 (36.67%) Big Data
6 22 (36.67%) OO
7 21 (35.00%) C++
8 20 (33.33%) Apache Spark
9 19 (31.67%) NoSQL
9 19 (31.67%) AWS
9 19 (31.67%) Finance
10 18 (30.00%) Hadoop
11 17 (28.33%) Data Science
12 16 (26.67%) Machine Learning
13 15 (25.00%) Kafka
13 15 (25.00%) Data Modelling
13 15 (25.00%) Banking
14 14 (23.33%) Scala
15 13 (21.67%) Test Automation
15 13 (21.67%) Low Latency
16 12 (20.00%) DevOps
16 12 (20.00%) Analytics
16 12 (20.00%) Degree
16 12 (20.00%) Computer Science
17 11 (18.33%) Multithreading
18 10 (16.67%) Equities
18 10 (16.67%) JavaScript
18 10 (16.67%) Open Source
18 10 (16.67%) Data Transformation

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 20 (33.33%) Apache Spark
2 5 (8.33%) Apache Airflow
2 5 (8.33%) Elasticsearch
3 4 (6.67%) Luigi
4 3 (5.00%) Confluence
5 2 (3.33%) Cloud Foundry
5 2 (3.33%) Ethereum
5 2 (3.33%) Hyperledger
5 2 (3.33%) OpenStack
6 1 (1.67%) Camunda
6 1 (1.67%) CMS
6 1 (1.67%) WebLogic
6 1 (1.67%) WebSphere
Applications
1 1 (1.67%) Microsoft Excel
Business Applications
1 2 (3.33%) Distributed Ledger
1 2 (3.33%) Oracle Assets
1 2 (3.33%) Oracle Cash Management
1 2 (3.33%) Oracle FAH
1 2 (3.33%) Oracle General Ledger
1 2 (3.33%) Oracle Internet Expenses
1 2 (3.33%) Oracle iProcurement
1 2 (3.33%) Oracle Payables
1 2 (3.33%) Oracle Receivables
1 2 (3.33%) Oracle Subledger Accounting
1 2 (3.33%) R3 Corda
2 1 (1.67%) Dynamics AX
Cloud Services
1 19 (31.67%) AWS
2 10 (16.67%) GCP
3 8 (13.33%) Azure
4 6 (10.00%) Amazon SageMaker
5 4 (6.67%) Amazon EC2
5 4 (6.67%) Amazon EMR
5 4 (6.67%) Amazon S3
6 3 (5.00%) AWS CloudFormation
7 2 (3.33%) Amazon ELB
7 2 (3.33%) AWS Lambda
7 2 (3.33%) Cloud Computing
7 2 (3.33%) IaaS
7 2 (3.33%) OpenShift
7 2 (3.33%) PaaS
7 2 (3.33%) Power Platform
7 2 (3.33%) SaaS
7 2 (3.33%) Serverless
8 1 (1.67%) Dynamics 365
8 1 (1.67%) GitHub
8 1 (1.67%) npm
Communications & Networking
1 7 (11.67%) Multicast
2 2 (3.33%) Peer-to-Peer Networking
2 2 (3.33%) VPN
3 1 (1.67%) HTTP
Database & Business Intelligence
1 22 (36.67%) Big Data
2 19 (31.67%) NoSQL
3 18 (30.00%) Hadoop
4 9 (15.00%) Apache Hive
5 5 (8.33%) Data Warehouse
5 5 (8.33%) Relational Database
6 4 (6.67%) Apache Cassandra
6 4 (6.67%) Azkaban
6 4 (6.67%) PostgreSQL
6 4 (6.67%) Redis
7 3 (5.00%) HBase
7 3 (5.00%) MongoDB
7 3 (5.00%) SQL Server
8 2 (3.33%) Amazon Redshift
8 2 (3.33%) Blockchain
8 2 (3.33%) BusinessObjects
8 2 (3.33%) Oracle BI EE
8 2 (3.33%) Power BI
8 2 (3.33%) QlikView
8 2 (3.33%) Snowflake Schema
Development Applications
1 8 (13.33%) Git (software)
2 6 (10.00%) Jenkins
2 6 (10.00%) JUnit
2 6 (10.00%) Maven
3 4 (6.67%) TestNG
4 3 (5.00%) JIRA
5 1 (1.67%) Ant
5 1 (1.67%) git-flow
5 1 (1.67%) Gradle
5 1 (1.67%) JMeter
5 1 (1.67%) Mockito
5 1 (1.67%) TeamCity
General
1 19 (31.67%) Finance
2 15 (25.00%) Banking
3 6 (10.00%) Front Office
4 5 (8.33%) Investment Banking
5 4 (6.67%) Public Sector
6 3 (5.00%) Retail
7 2 (3.33%) General Ledger
7 2 (3.33%) International Banking
7 2 (3.33%) Marketing
8 1 (1.67%) Manufacturing
Job Titles
1 28 (46.67%) Developer
2 20 (33.33%) Data Engineer
3 18 (30.00%) Java Developer
4 9 (15.00%) Analyst
4 9 (15.00%) Python Engineer
5 8 (13.33%) Senior Developer
6 7 (11.67%) Senior Java Developer
7 4 (6.67%) Business Process Analyst
7 4 (6.67%) Process Analyst
8 3 (5.00%) AWS Developer
8 3 (5.00%) Data Scientist
8 3 (5.00%) Investment Banking Java Developer
8 3 (5.00%) Python Developer
9 2 (3.33%) Big Data Developer
9 2 (3.33%) Blockchain Developer
9 2 (3.33%) Electronic Trading Developer
9 2 (3.33%) Electronic Trading Java Developer
9 2 (3.33%) Full Stack Developer
9 2 (3.33%) Functional Analyst
9 2 (3.33%) Oracle Analyst
Libraries, Frameworks & Software Standards
1 15 (25.00%) Kafka
2 8 (13.33%) FIX Protocol
3 7 (11.67%) RESTful
4 6 (10.00%) MLlib
4 6 (10.00%) Play Framework
4 6 (10.00%) PySpark
4 6 (10.00%) REST
4 6 (10.00%) scikit-learn
5 4 (6.67%) Spark Streaming
5 4 (6.67%) Spring
6 3 (5.00%) HTML
6 3 (5.00%) NumPy
6 3 (5.00%) WPF
6 3 (5.00%) XML
7 2 (3.33%) HTML5
7 2 (3.33%) Qt
7 2 (3.33%) React
7 2 (3.33%) Redux
7 2 (3.33%) STL
7 2 (3.33%) Web Services
Miscellaneous
1 24 (40.00%) Algorithms
2 10 (16.67%) Equities
3 8 (13.33%) Analytical Skills
3 8 (13.33%) Greenfield Project
4 6 (10.00%) User Experience
5 4 (6.67%) Public Cloud
6 1 (1.67%) Blog
6 1 (1.67%) Enterprise Software
6 1 (1.67%) Foreign Exchange (FX)
6 1 (1.67%) Hedge funds
6 1 (1.67%) Market Risk
6 1 (1.67%) Mobile App
6 1 (1.67%) Mobile Payment
6 1 (1.67%) Self-Motivation
6 1 (1.67%) Spread Betting
Operating Systems
1 5 (8.33%) Linux
2 3 (5.00%) Unix
Processes & Methodologies
1 33 (55.00%) Agile Software Development
2 22 (36.67%) OO
3 17 (28.33%) Data Science
4 16 (26.67%) Machine Learning
5 15 (25.00%) Data Modelling
6 13 (21.67%) Low Latency
6 13 (21.67%) Test Automation
7 12 (20.00%) Analytics
7 12 (20.00%) Computer Science
7 12 (20.00%) DevOps
8 11 (18.33%) Multithreading
9 10 (16.67%) Data Transformation
9 10 (16.67%) Open Source
10 9 (15.00%) Multithreaded Programming
11 8 (13.33%) Algorithmic Trading
11 8 (13.33%) Business Intelligence
11 8 (13.33%) ETL
11 8 (13.33%) Problem-Solving
11 8 (13.33%) TDD
11 8 (13.33%) Workload Management
Programming Languages
1 32 (53.33%) Java
2 31 (51.67%) SQL
3 27 (45.00%) Python
4 21 (35.00%) C++
5 14 (23.33%) Scala
6 10 (16.67%) JavaScript
7 7 (11.67%) Java 8
8 4 (6.67%) AWK
8 4 (6.67%) Go
8 4 (6.67%) R
8 4 (6.67%) sed
9 3 (5.00%) C#
9 3 (5.00%) MATLAB
10 2 (3.33%) ES6
11 1 (1.67%) Bash Shell
11 1 (1.67%) Kotlin
11 1 (1.67%) TypeScript
11 1 (1.67%) VBA
11 1 (1.67%) X++
Qualifications
1 12 (20.00%) Degree
2 2 (3.33%) Computer Science Degree
3 1 (1.67%) Master's Degree
3 1 (1.67%) PhD
Quality Assurance & Compliance
1 3 (5.00%) Data Quality
2 2 (3.33%) QA
System Software
1 2 (3.33%) Docker
Systems Management
1 2 (3.33%) Ansible
1 2 (3.33%) Kibana
1 2 (3.33%) Puppet
2 1 (1.67%) Terraform
Vendors
1 7 (11.67%) Solace
2 6 (10.00%) Google
3 3 (5.00%) Microsoft
3 3 (5.00%) Oracle
3 3 (5.00%) Teradata
4 2 (3.33%) Informatica
4 2 (3.33%) Talend
5 1 (1.67%) Netezza
5 1 (1.67%) Salesforce.com
5 1 (1.67%) Sybase
5 1 (1.67%) Tableau
5 1 (1.67%) Zoho