Period
to 14 May 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 14 May 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
14 May 2021
Same period 2020 Same period 2019
Rank 170 201 229
Rank change year-on-year +31 +28 +63
Contract jobs citing Data Structures 386 251 496
As % of all contract jobs advertised in London 1.62% 1.21% 1.23%
As % of the Miscellaneous category 4.88% 3.76% 3.86%
Number of daily rates quoted 245 153 346
10th Percentile £406 £400 £400
25th Percentile £475 £450 £464
Median daily rate (50th Percentile) £600 £550 £574
Median % change year-on-year +9.09% -4.14% +4.32%
75th Percentile £688 £663 £650
90th Percentile £775 £725 £730
England median daily rate £565 £520 £523
% change year-on-year +8.61% -0.48% +2.45%
Number of hourly rates quoted 1 1 1
10th Percentile " " "
25th Percentile £36.75 £53.75 £43.75
Median hourly rate £44.50 £57.50 £47.50
Median % change year-on-year -22.61% +21.05% +75.93%
75th Percentile £52.25 £61.25 £51.25
90th Percentile " " "
England median hourly rate £44.50 £57.50 £50.00
% change year-on-year -22.61% +15.00% -28.57%

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 7,914 6,675 12,853
As % of all contract IT jobs advertised in London 33.16% 32.15% 31.76%
Number of daily rates quoted 5,538 4,846 9,179
10th Percentile £350 £313 £325
25th Percentile £431 £413 £420
Median daily rate (50th Percentile) £538 £525 £525
Median % change year-on-year +2.38% - +5.00%
75th Percentile £650 £638 £625
90th Percentile £738 £725 £700
England median daily rate £500 £475 £475
% change year-on-year +5.26% - -
Number of hourly rates quoted 137 115 188
10th Percentile £15.46 £13.06 £13.10
25th Percentile £21.25 £18.00 £18.61
Median hourly rate £32.00 £31.72 £25.15
Median % change year-on-year +0.88% +26.14% +11.77%
75th Percentile £47.50 £47.44 £38.81
90th Percentile £60.00 £53.45 £51.11
England median hourly rate £26.00 £21.57 £21.00
% change year-on-year +20.54% +2.71% -2.33%

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 14 May 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 14 May 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 +6 38 £600 +18.76% 55
West London +22 7 £575 +27.78% 21
East London +17 3 £178 - 14
Data Structures
England

For the 6 months to 14 May 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.

1 143 (37.05%) SQL
2 141 (36.53%) Agile Software Development
3 140 (36.27%) Java
3 140 (36.27%) Algorithms
4 138 (35.75%) Finance
5 107 (27.72%) AWS
6 98 (25.39%) Multithreading
6 98 (25.39%) Banking
7 96 (24.87%) Python
8 84 (21.76%) Social Skills
9 83 (21.50%) C++
10 77 (19.95%) Foreign Exchange (FX)
11 73 (18.91%) Azure
12 69 (17.88%) Performance Tuning
13 68 (17.62%) C#
14 67 (17.36%) Computer Science
15 66 (17.10%) Front Office
16 63 (16.32%) Linux
16 63 (16.32%) Analytical Skills
17 60 (15.54%) Software Engineering
17 60 (15.54%) Analytics
18 58 (15.03%) HTML
19 57 (14.77%) .NET
19 57 (14.77%) Problem-Solving
20 56 (14.51%) Investment Banking
21 54 (13.99%) JavaScript
22 53 (13.73%) Scala
23 52 (13.47%) Oracle
24 51 (13.21%) OO
24 51 (13.21%) 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 38 (9.84%) Apache Spark
2 17 (4.40%) Apache Airflow
3 9 (2.33%) IIS
4 6 (1.55%) Luigi
5 5 (1.30%) CMS
5 5 (1.30%) Oracle Workflow
6 4 (1.04%) Confluence
6 4 (1.04%) Oracle Coherence
7 3 (0.78%) Headless CMS
7 3 (0.78%) IBM Domino
7 3 (0.78%) SAS
8 2 (0.52%) Apache
8 2 (0.52%) JBoss
8 2 (0.52%) Jupyter
8 2 (0.52%) nginx
8 2 (0.52%) Oracle SOA Suite
8 2 (0.52%) Tomcat
9 1 (0.26%) Apache Pig
9 1 (0.26%) GemFire
9 1 (0.26%) OpenStack
Applications
1 7 (1.81%) Microsoft Excel
2 4 (1.04%) Photoshop
3 1 (0.26%) Microsoft PowerPoint
3 1 (0.26%) Microsoft Project
3 1 (0.26%) MS Visio
Business Applications
1 4 (1.04%) Adobe Campaign
2 2 (0.52%) SAP HCM
3 1 (0.26%) Dynamics CRM
3 1 (0.26%) Dynamics GP
3 1 (0.26%) Loan IQ
Cloud Services
1 107 (27.72%) AWS
2 73 (18.91%) Azure
3 31 (8.03%) AWS CloudFormation
4 21 (5.44%) GCP
4 21 (5.44%) Serverless
5 15 (3.89%) Amazon S3
5 15 (3.89%) AWS Lambda
6 14 (3.63%) GitHub
6 14 (3.63%) Heroku
6 14 (3.63%) Power Platform
7 12 (3.11%) Amazon Kinesis
8 10 (2.59%) Google Analytics
8 10 (2.59%) IaaS
9 9 (2.33%) Amazon ECS
9 9 (2.33%) PaaS
9 9 (2.33%) SaaS
10 6 (1.55%) Amazon EC2
10 6 (1.55%) Amazon EMR
11 5 (1.30%) AWS Data Pipeline
11 5 (1.30%) Azure Data Factory
Communications & Networking
1 12 (3.11%) HTTP
2 10 (2.59%) SSL
3 7 (1.81%) TCP/IP
4 2 (0.52%) Internet
5 1 (0.26%) Firewall
Database & Business Intelligence
1 48 (12.44%) Data Warehouse
2 47 (12.18%) SQL Server
3 42 (10.88%) NoSQL
4 38 (9.84%) Big Data
5 28 (7.25%) PostgreSQL
6 27 (6.99%) Relational Database
7 25 (6.48%) Data Lake
8 23 (5.96%) Snowflake Schema
9 16 (4.15%) Hadoop
10 14 (3.63%) Power BI
10 14 (3.63%) Redis
11 13 (3.37%) Amazon Redshift
11 13 (3.37%) Parquet
12 12 (3.11%) Hazelcast
12 12 (3.11%) MongoDB
12 12 (3.11%) SQL Server Integration Services
12 12 (3.11%) Tableau
13 10 (2.59%) Oracle Database
13 10 (2.59%) SQL Server Analysis Services
13 10 (2.59%) Star Schema
Development Applications
1 36 (9.33%) JIRA
2 31 (8.03%) Git (software)
3 24 (6.22%) Jenkins
4 18 (4.66%) JUnit
4 18 (4.66%) webpack
5 15 (3.89%) git-flow
5 15 (3.89%) SQL Server Management Studio (SSMS)
6 14 (3.63%) Mockito
6 14 (3.63%) TeamCity
7 12 (3.11%) Maven
8 11 (2.85%) Gradle
9 10 (2.59%) Cucumber
9 10 (2.59%) Visual Studio
10 6 (1.55%) Concordion
10 6 (1.55%) GitLab
10 6 (1.55%) JBehave
10 6 (1.55%) Subversion
11 5 (1.30%) Oracle APEX
12 4 (1.04%) EasyMock
12 4 (1.04%) TestNG
General
1 138 (35.75%) Finance
2 98 (25.39%) Banking
3 84 (21.76%) Social Skills
4 66 (17.10%) Front Office
5 63 (16.32%) Analytical Skills
6 56 (14.51%) Investment Banking
7 9 (2.33%) Retail
8 6 (1.55%) German Language
9 5 (1.30%) Influencing Skills
10 4 (1.04%) Financial Institution
10 4 (1.04%) French Language
10 4 (1.04%) Italian Language
10 4 (1.04%) Legal
10 4 (1.04%) Marketing
10 4 (1.04%) Public Sector
11 3 (0.78%) Documentation Skills
11 3 (0.78%) Pharmaceutical
11 3 (0.78%) Presentation Skills
12 2 (0.52%) Games
12 2 (0.52%) Organisational Skills
Job Titles
1 233 (60.36%) Developer
2 95 (24.61%) Java Developer
3 49 (12.69%) C# Developer
4 41 (10.62%) Data Engineer
5 34 (8.81%) Front Office Developer
6 32 (8.29%) Investment Banking Java Developer
7 29 (7.51%) Analyst
7 29 (7.51%) Architect
8 27 (6.99%) Quantitative Developer
9 23 (5.96%) C# Quant Developer
10 22 (5.70%) Full Stack Developer
10 22 (5.70%) React Developer
11 19 (4.92%) .NET Developer
11 19 (4.92%) Business Analyst
11 19 (4.92%) Senior Developer
12 18 (4.66%) Python Developer
13 17 (4.40%) Data Architect
14 15 (3.89%) C# .NET Developer
14 15 (3.89%) Python Engineer
15 14 (3.63%) Oracle Developer
Libraries, Frameworks & Software Standards
1 58 (15.03%) HTML
2 57 (14.77%) .NET
3 48 (12.44%) Kafka
3 48 (12.44%) Spring
4 43 (11.14%) .NET Core
5 38 (9.84%) REST
6 37 (9.59%) CSS
6 37 (9.59%) FIX Protocol
7 32 (8.29%) Web Services
8 30 (7.77%) GraphQL
9 27 (6.99%) React
9 27 (6.99%) Spring Boot
10 24 (6.22%) RESTful
11 23 (5.96%) AngularJS
11 23 (5.96%) XML
12 22 (5.70%) HTML5
12 22 (5.70%) Node.js
13 21 (5.44%) Redux
14 18 (4.66%) Jest
15 17 (4.40%) JSON
Miscellaneous
1 140 (36.27%) Algorithms
2 77 (19.95%) Foreign Exchange (FX)
3 51 (13.21%) Derivative
4 39 (10.10%) Greenfield Project
5 32 (8.29%) Enterprise Software
5 32 (8.29%) User Experience
6 29 (7.51%) Hedge funds
7 28 (7.25%) Management Information System
8 15 (3.89%) Virtual Team
9 14 (3.63%) Fixed Income
10 11 (2.85%) Self-Motivation
11 10 (2.59%) Cloud Native
11 10 (2.59%) Clustering
11 10 (2.59%) CMDB
12 9 (2.33%) Reference Data
12 9 (2.33%) Taxonomies
13 8 (2.07%) Equities
14 7 (1.81%) Linux Command Line
15 4 (1.04%) Marketing Technology
15 4 (1.04%) Public Cloud
Operating Systems
1 63 (16.32%) Linux
2 17 (4.40%) Unix
3 7 (1.81%) CentOS
4 6 (1.55%) Android
4 6 (1.55%) Apple iOS
4 6 (1.55%) Ubuntu
4 6 (1.55%) Windows
Processes & Methodologies
1 141 (36.53%) Agile Software Development
2 98 (25.39%) Multithreading
3 69 (17.88%) Performance Tuning
4 67 (17.36%) Computer Science
5 60 (15.54%) Analytics
5 60 (15.54%) Software Engineering
6 57 (14.77%) Problem-Solving
7 51 (13.21%) DevOps
7 51 (13.21%) OO
8 50 (12.95%) TDD
9 49 (12.69%) ETL
9 49 (12.69%) Multithreaded Programming
10 46 (11.92%) Low Latency
11 43 (11.14%) Microservices
12 40 (10.36%) Scrum
13 39 (10.10%) API Design
13 39 (10.10%) Business Intelligence
14 38 (9.84%) Data Pipeline
15 37 (9.59%) Memory Management
16 35 (9.07%) Algorithmic Trading
Programming Languages
1 143 (37.05%) SQL
2 140 (36.27%) Java
3 96 (24.87%) Python
4 83 (21.50%) C++
5 68 (17.62%) C#
6 54 (13.99%) JavaScript
7 53 (13.73%) Scala
8 33 (8.55%) TypeScript
9 32 (8.29%) Java 8
10 30 (7.77%) PL/SQL
11 14 (3.63%) ES6
12 12 (3.11%) Haskell
13 10 (2.59%) PowerShell
14 9 (2.33%) Go
15 8 (2.07%) C
16 7 (1.81%) Apple Swift
16 7 (1.81%) Groovy
16 7 (1.81%) T-SQL
17 6 (1.55%) Shell Script
18 5 (1.30%) Objective-C
Qualifications
1 33 (8.55%) Degree
2 21 (5.44%) Computer Science Degree
3 17 (4.40%) SC Cleared
3 17 (4.40%) Security Cleared
4 7 (1.81%) AWS Certification
4 7 (1.81%) PhD
5 6 (1.55%) DV Cleared
6 3 (0.78%) Master's Degree
7 2 (0.52%) ACCA
7 2 (0.52%) CIMA
8 1 (0.26%) BPSS Clearance
8 1 (0.26%) ISEB
Quality Assurance & Compliance
1 21 (5.44%) QA
2 17 (4.40%) Data Quality
3 4 (1.04%) IFRS
3 4 (1.04%) MiFID
3 4 (1.04%) Sarbanes-Oxley
4 3 (0.78%) GDPR
5 2 (0.52%) Dodd-Frank
5 2 (0.52%) IFRS 9
6 1 (0.26%) ISO 20022
6 1 (0.26%) PCI DSS
6 1 (0.26%) WCAG
System Software
1 37 (9.59%) Docker
2 4 (1.04%) Active Directory
2 4 (1.04%) ISA Server
3 3 (0.78%) HDFS
4 1 (0.26%) Ceph
Systems Management
1 37 (9.59%) Kubernetes
2 33 (8.55%) Terraform
3 8 (2.07%) Prometheus
4 6 (1.55%) MIIS
5 5 (1.30%) Ansible
5 5 (1.30%) Puppet
6 4 (1.04%) Control-M
6 4 (1.04%) Istio
7 2 (0.52%) Opscode Chef
8 1 (0.26%) Core Impact
8 1 (0.26%) Kubeflow
Vendors
1 52 (13.47%) Oracle
2 25 (6.48%) Google
3 20 (5.18%) Microsoft
4 11 (2.85%) Databricks
5 8 (2.07%) Salesforce.com
6 7 (1.81%) DevExpress
7 5 (1.30%) Apple
8 4 (1.04%) Adobe
8 4 (1.04%) IBM
8 4 (1.04%) Marketo
8 4 (1.04%) SAP
9 3 (0.78%) Atlassian
9 3 (0.78%) hybris
9 3 (0.78%) Xerox
10 2 (0.52%) Segue
10 2 (0.52%) StreamSets
10 2 (0.52%) Teradata
11 1 (0.26%) Ab Initio
11 1 (0.26%) Cisco
11 1 (0.26%) Netezza