Period
to 20 September 2021

The table below looks at the prevalence of the term Data Structures in contract job vacancies advertised in London. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Data Structures over the 6 months to 20 September 2021 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
England > London
6 months to
20 Sep 2021
Same period 2020 Same period 2019
Rank 180 237 274
Rank change year-on-year +57 +37 -6
Contract jobs citing Data Structures 521 116 386
As % of all contract jobs advertised in London 1.56% 0.88% 0.99%
As % of the Miscellaneous category 4.77% 2.41% 3.14%
Number of daily rates quoted 345 75 279
10th Percentile £425 £378 £368
25th Percentile £488 £438 £450
Median daily rate (50th Percentile) £588 £600 £550
Median % change year-on-year -2.08% +9.09% +4.76%
75th Percentile £700 £694 £638
90th Percentile £813 £794 £713
England median daily rate £575 £525 £525
% change year-on-year +9.52% - +5.00%
Number of hourly rates quoted 1 0 3
10th Percentile " " £18.15
25th Percentile £36.75 " £27.75
Median hourly rate £44.50 - £47.50
75th Percentile £52.25 " £51.25
90th Percentile " " "
England median hourly rate £25.75 £39.50 £47.50
% change year-on-year -34.81% -16.84% +28.07%

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 London with a requirement for generic IT skills.

All Generic IT Skills
London
Contract vacancies with a requirement for generic IT skills 10,931 4,817 12,302
As % of all contract IT jobs advertised in London 32.76% 36.70% 31.68%
Number of daily rates quoted 7,906 3,473 8,788
10th Percentile £363 £318 £318
25th Percentile £463 £425 £413
Median daily rate (50th Percentile) £555 £540 £525
Median % change year-on-year +2.78% +2.86% -
75th Percentile £675 £663 £625
90th Percentile £750 £750 £700
England median daily rate £525 £500 £475
% change year-on-year +5.00% +5.26% -
Number of hourly rates quoted 154 67 155
10th Percentile £14.62 £15.56 £12.76
25th Percentile £20.40 £23.75 £15.85
Median hourly rate £32.50 £37.75 £22.50
Median % change year-on-year -13.91% +67.78% -4.26%
75th Percentile £48.31 £47.75 £47.50
90th Percentile £62.45 £53.50 £52.80
England median hourly rate £25.00 £31.50 £20.98
% change year-on-year -20.63% +50.16% -0.70%

Data Structures
Job Vacancy Trend in London

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

Job vacancy trend for Data Structures in London

Data Structures
Contractor Daily Rate Trend in London

3-month moving average daily rate quoted in jobs citing Data Structures in London.

Daily rate trend for Data Structures in London

Data Structures
Daily Rate Histogram in London

Daily rate distribution for jobs citing Data Structures in London over the 6 months to 20 September 2021.

Daily rate histogram for Data Structures in London

Data Structures
Contractor Hourly Rate Trend in London

3-month moving average hourly rates quoted in jobs citing Data Structures in London.

Hourly rate trend for Data Structures in London

Data Structures
Contract Job Locations in 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 London region over the 6 months to 20 September 2021. 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
Central London -15 54 £650 +27.45% 65
West London -17 5 £555 +5.71% 20
East London -11 1 £300 - 9
Data Structures
England

For the 6 months to 20 September 2021, 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 London region with a requirement for Data Structures.

1 217 (41.65%) Java
2 207 (39.73%) Agile Software Development
3 191 (36.66%) SQL
4 173 (33.21%) Algorithms
5 162 (31.09%) Finance
6 124 (23.80%) Banking
7 121 (23.22%) Multithreading
8 116 (22.26%) Python
9 107 (20.54%) Analytics
10 105 (20.15%) DevOps
10 105 (20.15%) Azure
11 102 (19.58%) Analytical Skills
12 100 (19.19%) Social Skills
13 98 (18.81%) Performance Tuning
13 98 (18.81%) Foreign Exchange (FX)
14 95 (18.23%) AWS
15 91 (17.47%) Linux
16 86 (16.51%) Scala
17 85 (16.31%) Investment Banking
18 81 (15.55%) JavaScript
19 80 (15.36%) Front Office
20 77 (14.78%) API Design
21 75 (14.40%) C#
22 73 (14.01%) Computer Science
23 71 (13.63%) OO
24 70 (13.44%) Oracle
25 68 (13.05%) Scrum
25 68 (13.05%) RESTful
26 65 (12.48%) Git (software)
26 65 (12.48%) Derivative

Data Structures
Co-occurring IT Skills in 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 45 (8.64%) Apache Spark
2 18 (3.45%) Apache Airflow
2 18 (3.45%) Luigi
3 15 (2.88%) Elasticsearch
4 12 (2.30%) Apache
5 9 (1.73%) Confluence
6 7 (1.34%) CMS
7 5 (0.96%) Headless CMS
7 5 (0.96%) IIS
7 5 (0.96%) OpenStack
7 5 (0.96%) Oracle Workflow
8 4 (0.77%) BizTalk Server
8 4 (0.77%) nginx
8 4 (0.77%) SAS
9 3 (0.58%) Oracle Coherence
10 2 (0.38%) Hyperledger
10 2 (0.38%) IBM Domino
10 2 (0.38%) JBoss
10 2 (0.38%) Oracle SOA Suite
10 2 (0.38%) Tomcat
Applications
1 8 (1.54%) Photoshop
2 2 (0.38%) Microsoft Excel
3 1 (0.19%) Chatbot
3 1 (0.19%) Microsoft PowerPoint
3 1 (0.19%) MS Visio
Business Applications
1 8 (1.54%) Adobe Campaign
2 2 (0.38%) SAP Hybris
3 1 (0.19%) Elite 3E
3 1 (0.19%) Magento
3 1 (0.19%) Oracle EBS
3 1 (0.19%) Oracle EBS R12
3 1 (0.19%) Salesforce.com CRM
3 1 (0.19%) SAP HCM
3 1 (0.19%) SAP R/3
3 1 (0.19%) SAP S/4HANA
3 1 (0.19%) Siebel CRM
Cloud Services
1 105 (20.15%) Azure
2 95 (18.23%) AWS
3 41 (7.87%) Serverless
4 37 (7.10%) GCP
5 23 (4.41%) IaaS
6 18 (3.45%) AWS Lambda
7 17 (3.26%) Azure Cosmos DB
7 17 (3.26%) Power Platform
8 16 (3.07%) PaaS
9 15 (2.88%) Azure Functions
10 14 (2.69%) Azure Data Factory
11 13 (2.50%) AWS CloudFormation
12 11 (2.11%) SaaS
13 10 (1.92%) GitHub
13 10 (1.92%) npm
14 9 (1.73%) Amazon S3
15 8 (1.54%) Amazon EC2
15 8 (1.54%) Amazon EMR
15 8 (1.54%) Azure Service Bus
15 8 (1.54%) OpenShift
Communications & Networking
1 31 (5.95%) TCP/IP
2 28 (5.37%) SSL
3 6 (1.15%) Firewall
4 4 (0.77%) HTTP
5 3 (0.58%) Internet
6 2 (0.38%) DNS
6 2 (0.38%) SMTP
6 2 (0.38%) SSH
6 2 (0.38%) VPN
7 1 (0.19%) Cisco ASA
7 1 (0.19%) DHCP
7 1 (0.19%) Ethernet
7 1 (0.19%) FDDI
7 1 (0.19%) HTTPS
7 1 (0.19%) IPv4
7 1 (0.19%) IPv6
7 1 (0.19%) SNMP
7 1 (0.19%) WAN
7 1 (0.19%) Wi-Fi
7 1 (0.19%) WLAN
Database & Business Intelligence
1 64 (12.28%) Big Data
2 62 (11.90%) Relational Database
3 53 (10.17%) NoSQL
4 44 (8.45%) Metadata
5 42 (8.06%) Hadoop
6 41 (7.87%) SQL Server
7 38 (7.29%) Data Warehouse
7 38 (7.29%) PostgreSQL
8 35 (6.72%) Redis
9 30 (5.76%) Hazelcast
10 24 (4.61%) Apache Hive
11 21 (4.03%) MongoDB
12 20 (3.84%) Spark SQL
13 19 (3.65%) Apache Cassandra
13 19 (3.65%) Data Lake
13 19 (3.65%) SQL Server Integration Services
14 18 (3.45%) Azkaban
14 18 (3.45%) RDBMS
15 17 (3.26%) Power BI
16 16 (3.07%) MySQL
Development Applications
1 65 (12.48%) Git (software)
2 33 (6.33%) Jenkins
3 32 (6.14%) JIRA
4 23 (4.41%) Maven
5 21 (4.03%) webpack
6 15 (2.88%) Subversion
7 14 (2.69%) JUnit
8 13 (2.50%) Artifactory
8 13 (2.50%) TeamCity
9 11 (2.11%) Mockito
9 11 (2.11%) Visual Studio
10 8 (1.54%) EasyMock
10 8 (1.54%) git-flow
10 8 (1.54%) Gradle
10 8 (1.54%) TestNG
11 7 (1.34%) Mocha
11 7 (1.34%) SpecFlow
12 6 (1.15%) gulp
12 6 (1.15%) Selenium
12 6 (1.15%) Visual Studio Team System
General
1 162 (31.09%) Finance
2 124 (23.80%) Banking
3 102 (19.58%) Analytical Skills
4 100 (19.19%) Social Skills
5 85 (16.31%) Investment Banking
6 80 (15.36%) Front Office
7 17 (3.26%) Marketing
8 15 (2.88%) Organisational Skills
8 15 (2.88%) Presentation Skills
9 11 (2.11%) Retail
10 10 (1.92%) Documentation Skills
11 9 (1.73%) German Language
12 8 (1.54%) French Language
12 8 (1.54%) Italian Language
13 6 (1.15%) Public Sector
13 6 (1.15%) Retail Banking
14 4 (0.77%) Influencing Skills
14 4 (0.77%) Law
15 3 (0.58%) Advertising
15 3 (0.58%) Telecoms
Job Titles
1 288 (55.28%) Developer
2 131 (25.14%) Java Developer
3 76 (14.59%) Senior Developer
4 55 (10.56%) Senior Java Developer
5 53 (10.17%) Data Engineer
6 44 (8.45%) Analyst
7 37 (7.10%) Architect
8 27 (5.18%) Full Stack Developer
8 27 (5.18%) Investment Banking Java Developer
9 24 (4.61%) C# Developer
10 21 (4.03%) Python Developer
11 20 (3.84%) Software Engineer
12 19 (3.65%) Business Analyst
13 17 (3.26%) .NET Developer
13 17 (3.26%) Technical Architect
14 16 (3.07%) Azure Engineer
14 16 (3.07%) React Developer
15 15 (2.88%) Consultant
15 15 (2.88%) Data Analyst
15 15 (2.88%) SQL Analyst
Libraries, Frameworks & Software Standards
1 68 (13.05%) RESTful
2 65 (12.48%) Spring
3 61 (11.71%) HTML
4 60 (11.52%) Kafka
5 59 (11.32%) .NET
6 50 (9.60%) CSS
7 45 (8.64%) Spring Boot
8 44 (8.45%) REST
9 42 (8.06%) React
10 41 (7.87%) Node.js
11 33 (6.33%) .NET Core
11 33 (6.33%) GraphQL
12 30 (5.76%) Memcached
13 28 (5.37%) AngularJS
14 24 (4.61%) FIX Protocol
14 24 (4.61%) HTML5
14 24 (4.61%) JSON
15 23 (4.41%) Web Services
16 18 (3.45%) Jest
17 16 (3.07%) Middleware
Miscellaneous
1 173 (33.21%) Algorithms
2 98 (18.81%) Foreign Exchange (FX)
3 65 (12.48%) Derivative
4 37 (7.10%) Fixed Income
5 26 (4.99%) Greenfield Project
5 26 (4.99%) Management Information System
5 26 (4.99%) User Experience
6 22 (4.22%) Cloud Native
7 19 (3.65%) CMDB
7 19 (3.65%) Enterprise Software
8 15 (2.88%) Equities
9 14 (2.69%) Virtual Team
10 12 (2.30%) Data Centre
10 12 (2.30%) Hedge funds
11 8 (1.54%) Linux Command Line
11 8 (1.54%) Marketing Technology
12 6 (1.15%) Legacy Systems
12 6 (1.15%) Replication
13 4 (0.77%) Credit Risk
13 4 (0.77%) NHS
Operating Systems
1 91 (17.47%) Linux
2 38 (7.29%) Unix
3 20 (3.84%) Windows
4 5 (0.96%) Apple iOS
5 4 (0.77%) Android
6 3 (0.58%) Red Hat Enterprise Linux
6 3 (0.58%) Ubuntu
7 2 (0.38%) CentOS
8 1 (0.19%) AIX
8 1 (0.19%) Debian
8 1 (0.19%) HPUX
8 1 (0.19%) Mac OS X
8 1 (0.19%) Slackware
8 1 (0.19%) Solaris
8 1 (0.19%) Windows Server
Processes & Methodologies
1 207 (39.73%) Agile Software Development
2 121 (23.22%) Multithreading
3 107 (20.54%) Analytics
4 105 (20.15%) DevOps
5 98 (18.81%) Performance Tuning
6 77 (14.78%) API Design
7 73 (14.01%) Computer Science
8 71 (13.63%) OO
9 68 (13.05%) Scrum
10 65 (12.48%) Problem-Solving
10 65 (12.48%) Software Engineering
11 57 (10.94%) API Development
12 56 (10.75%) Full Stack Development
12 56 (10.75%) Low Latency
12 56 (10.75%) Microservices
13 52 (9.98%) Test Automation
14 51 (9.79%) ETL
15 50 (9.60%) Data Modelling
16 48 (9.21%) Data Pipeline
17 46 (8.83%) Business Intelligence
Programming Languages
1 217 (41.65%) Java
2 191 (36.66%) SQL
3 116 (22.26%) Python
4 86 (16.51%) Scala
5 81 (15.55%) JavaScript
6 75 (14.40%) C#
7 57 (10.94%) Java 8
8 54 (10.36%) C++
9 40 (7.68%) PL/SQL
9 40 (7.68%) TypeScript
10 29 (5.57%) Haskell
11 20 (3.84%) ES6
12 15 (2.88%) Go
13 12 (2.30%) Apex Code
14 10 (1.92%) Java 11
15 9 (1.73%) PowerShell
16 8 (1.54%) PHP
17 7 (1.34%) Groovy
17 7 (1.34%) T-SQL
18 5 (0.96%) Ruby
Qualifications
1 51 (9.79%) Degree
2 28 (5.37%) Computer Science Degree
3 16 (3.07%) Security Cleared
4 11 (2.11%) SC Cleared
5 6 (1.15%) PhD
6 4 (0.77%) DV Cleared
7 3 (0.58%) AWS Certification
8 2 (0.38%) ACCA
8 2 (0.38%) CIMA
8 2 (0.38%) Master's Degree
9 1 (0.19%) CTC Cleared
9 1 (0.19%) DBS Check
9 1 (0.19%) ISEB
Quality Assurance & Compliance
1 29 (5.57%) QA
2 19 (3.65%) Accessibility
3 16 (3.07%) Data Quality
4 4 (0.77%) GDPR
5 2 (0.38%) COBIT
5 2 (0.38%) ISO/IEC 27001
5 2 (0.38%) MiFID
5 2 (0.38%) NIST
5 2 (0.38%) Sarbanes-Oxley
6 1 (0.19%) PCI DSS
6 1 (0.19%) SLA
6 1 (0.19%) WCAG
System Software
1 63 (12.09%) Docker
2 6 (1.15%) Active Directory
3 2 (0.38%) HDFS
Systems Management
1 64 (12.28%) Kubernetes
2 27 (5.18%) Terraform
3 17 (3.26%) Ansible
3 17 (3.26%) Prometheus
4 13 (2.50%) MIIS
5 12 (2.30%) BladeLogic
5 12 (2.30%) ITRS Geneos
6 8 (1.54%) Opscode Chef
7 5 (0.96%) Control-M
8 4 (0.77%) Core Impact
8 4 (0.77%) Istio
8 4 (0.77%) Puppet
9 2 (0.38%) Kubeflow
10 1 (0.19%) Active Directory Federation Services
10 1 (0.19%) FortiGate
10 1 (0.19%) Grafana
10 1 (0.19%) Kibana
10 1 (0.19%) Salt
10 1 (0.19%) SCCM
10 1 (0.19%) vCenter Server
Vendors
1 70 (13.44%) Oracle
2 29 (5.57%) Salesforce.com
3 27 (5.18%) Microsoft
4 26 (4.99%) Databricks
5 22 (4.22%) Google
6 12 (2.30%) Adobe
6 12 (2.30%) Altiris
7 10 (1.92%) SAP
8 9 (1.73%) hybris
9 8 (1.54%) Marketo
10 5 (0.96%) Dynatrace
10 5 (0.96%) New Relic
10 5 (0.96%) Splunk
11 4 (0.77%) PagerDuty
11 4 (0.77%) Talend
12 3 (0.58%) Apple
12 3 (0.58%) BiZZdesign
12 3 (0.58%) DevExpress
12 3 (0.58%) Red Hat
12 3 (0.58%) ServiceNow