Period
to 25 February 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 25 February 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
25 Feb 2021
Same period 2020 Same period 2019
Rank 184 225 243
Rank change year-on-year +41 +18 +19
Contract jobs citing Data Structures 277 323 507
As % of all contract jobs advertised in London 1.41% 1.14% 1.16%
As % of the Miscellaneous category 3.71% 3.32% 3.30%
Number of daily rates quoted 216 203 358
Median daily rate £575 £550 £575
Median daily rate % change year-on-year +4.55% -4.35% +4.55%
10th Percentile £388 £375 £409
90th Percentile £775 £725 £752
England median daily rate £550 £524 £520
% change year-on-year +4.96% +0.77% +4.00%
Number of hourly rates quoted 0 1 4
Median hourly rate - £57.50 £39.64
Median hourly rate % change year-on-year - +45.06% -4.48%
England median hourly rate £57.50 £42.50 £39.50
% change year-on-year +35.29% +7.59% -21.00%

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 7,466 9,740 15,370
As % of all contract IT jobs advertised in London 37.96% 34.35% 35.18%
Number of daily rates quoted 5,209 6,933 11,036
Median daily rate £525 £513 £525
Median daily rate % change year-on-year +2.44% -2.38% +5.00%
10th Percentile £315 £288 £313
90th Percentile £725 £706 £700
England median daily rate £475 £475 £475
Number of hourly rates quoted 116 148 254
Median hourly rate £31.50 £24.12 £22.38
Median hourly rate % change year-on-year +30.58% +7.77% -0.53%
10th Percentile £16.99 £12.44 £12.83
90th Percentile £57.50 £52.33 £47.00
Median hourly rate £26.00 £21.46 £20.25
% change year-on-year +21.17% +5.99% -3.60%

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 25 February 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 25 February 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 +20 28 £594 +13.59% 59
West London +44 19 £614 +36.39% 19
Data Structures
England

For the 6 months to 25 February 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.

1 122 (44.04%) Agile Software Development
2 101 (36.46%) Algorithms
3 99 (35.74%) Java
4 98 (35.38%) Finance
5 87 (31.41%) SQL
6 78 (28.16%) Python
7 66 (23.83%) Banking
8 63 (22.74%) Multithreading
8 63 (22.74%) AWS
9 58 (20.94%) Analytics
10 56 (20.22%) Computer Science
11 55 (19.86%) Azure
12 54 (19.49%) Analytical Skills
13 48 (17.33%) C++
14 46 (16.61%) Software Engineering
15 44 (15.88%) JavaScript
16 42 (15.16%) OO
16 42 (15.16%) Data Warehouse
17 41 (14.80%) Investment Banking
18 40 (14.44%) DevOps
18 40 (14.44%) Problem-Solving
19 39 (14.08%) Performance Tuning
19 39 (14.08%) HTML
20 38 (13.72%) Front Office
20 38 (13.72%) Spring
20 38 (13.72%) Multithreaded Programming
21 37 (13.36%) TDD
21 37 (13.36%) Foreign Exchange (FX)
22 36 (13.00%) Linux
22 36 (13.00%) Scrum

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 29 (10.47%) Apache Spark
2 14 (5.05%) Apache Airflow
3 9 (3.25%) WebLogic
3 9 (3.25%) WebSphere
4 6 (2.17%) SAS
5 5 (1.81%) CMS
5 5 (1.81%) SharePoint
6 2 (0.72%) Confluence
6 2 (0.72%) Jupyter
6 2 (0.72%) Oracle Coherence
7 1 (0.36%) Apache
7 1 (0.36%) Apache Pig
7 1 (0.36%) Elasticsearch
7 1 (0.36%) IBM Domino
7 1 (0.36%) IIS
7 1 (0.36%) Luigi
Applications
1 7 (2.53%) Microsoft Excel
2 6 (2.17%) Microsoft Office
3 1 (0.36%) Microsoft PowerPoint
3 1 (0.36%) MS Visio
3 1 (0.36%) SPSS
Business Applications
1 2 (0.72%) Dynamics CRM
2 1 (0.36%) Dynamics GP
2 1 (0.36%) Salesforce.com CRM
2 1 (0.36%) SAP HCM
Cloud Services
1 63 (22.74%) AWS
2 55 (19.86%) Azure
3 19 (6.86%) AWS CloudFormation
4 17 (6.14%) Power Platform
5 16 (5.78%) GitHub
6 12 (4.33%) GCP
7 11 (3.97%) Amazon Kinesis
8 9 (3.25%) Dynamics 365
8 9 (3.25%) Serverless
9 8 (2.89%) Cloud Computing
9 8 (2.89%) Heroku
9 8 (2.89%) PaaS
10 7 (2.53%) Amazon ECS
10 7 (2.53%) Amazon S3
10 7 (2.53%) SaaS
11 5 (1.81%) Google Analytics
12 4 (1.44%) Azure Data Factory
12 4 (1.44%) Google Play
12 4 (1.44%) IaaS
13 3 (1.08%) AWS Lambda
Communications & Networking
1 20 (7.22%) HTTP
2 2 (0.72%) Internet
2 2 (0.72%) SSL
3 1 (0.36%) WebEx
Database & Business Intelligence
1 42 (15.16%) Data Warehouse
2 31 (11.19%) Big Data
2 31 (11.19%) NoSQL
3 26 (9.39%) SQL Server
4 24 (8.66%) Relational Database
5 19 (6.86%) PostgreSQL
6 18 (6.50%) Tableau
7 17 (6.14%) Data Lake
7 17 (6.14%) Power BI
8 14 (5.05%) Snowflake Schema
9 13 (4.69%) Oracle Database
10 12 (4.33%) Hadoop
11 11 (3.97%) Redis
12 10 (3.61%) Parquet
13 8 (2.89%) Oracle Database 11g
13 8 (2.89%) Oracle Database 12c
13 8 (2.89%) RDBMS
14 7 (2.53%) Apache Cassandra
15 6 (2.17%) Oracle BI EE
15 6 (2.17%) Spotfire
Development Applications
1 33 (11.91%) Jenkins
2 24 (8.66%) Git (software)
2 24 (8.66%) JIRA
3 16 (5.78%) git-flow
3 16 (5.78%) JUnit
4 14 (5.05%) Maven
5 13 (4.69%) Gradle
5 13 (4.69%) Mockito
6 11 (3.97%) SQL Server Management Studio (SSMS)
7 10 (3.61%) webpack
8 9 (3.25%) Ant
8 9 (3.25%) JMeter
9 8 (2.89%) Cucumber
9 8 (2.89%) TeamCity
10 6 (2.17%) GitLab
11 4 (1.44%) Subversion
12 3 (1.08%) Android Studio
12 3 (1.08%) Concordion
12 3 (1.08%) JBehave
12 3 (1.08%) Visual Studio
General
1 98 (35.38%) Finance
2 66 (23.83%) Banking
3 41 (14.80%) Investment Banking
4 38 (13.72%) Front Office
5 14 (5.05%) Retail
6 9 (3.25%) Pharmaceutical
7 5 (1.81%) Marketing
8 4 (1.44%) Financial Institution
8 4 (1.44%) Manufacturing
9 2 (0.72%) Games
9 2 (0.72%) Public Sector
9 2 (0.72%) Publishing
9 2 (0.72%) Retail Banking
10 1 (0.36%) Legal
10 1 (0.36%) Local Government
10 1 (0.36%) Prime Brokerage
10 1 (0.36%) Telecoms
Job Titles
1 152 (54.87%) Developer
2 55 (19.86%) Java Developer
3 27 (9.75%) Data Engineer
4 25 (9.03%) C# Developer
5 24 (8.66%) Analyst
6 19 (6.86%) Front Office Developer
7 18 (6.50%) Quantitative Developer
8 16 (5.78%) Investment Banking Java Developer
8 16 (5.78%) Python Developer
9 15 (5.42%) Architect
10 13 (4.69%) Data Architect
10 13 (4.69%) React Developer
11 12 (4.33%) Business Analyst
11 12 (4.33%) Oracle Developer
11 12 (4.33%) Python Engineer
12 11 (3.97%) C# Quant Developer
12 11 (3.97%) Full Stack Developer
12 11 (3.97%) Senior Developer
13 10 (3.61%) Consultant
13 10 (3.61%) Node.js Developer
Libraries, Frameworks & Software Standards
1 39 (14.08%) HTML
2 38 (13.72%) Spring
3 35 (12.64%) Web Services
4 30 (10.83%) Kafka
4 30 (10.83%) React
5 27 (9.75%) .NET
6 25 (9.03%) XML
7 23 (8.30%) Redux
8 22 (7.94%) FIX Protocol
8 22 (7.94%) REST
8 22 (7.94%) RESTful
9 21 (7.58%) CSS
10 19 (6.86%) HTML5
10 19 (6.86%) JSON
11 18 (6.50%) .NET Core
12 15 (5.42%) Spring Boot
13 14 (5.05%) AngularJS
13 14 (5.05%) GraphQL
13 14 (5.05%) NumPy
14 11 (3.97%) Node.js
Miscellaneous
1 101 (36.46%) Algorithms
2 54 (19.49%) Analytical Skills
3 37 (13.36%) Foreign Exchange (FX)
4 32 (11.55%) User Experience
5 30 (10.83%) Enterprise Software
6 21 (7.58%) Greenfield Project
7 20 (7.22%) Derivative
8 13 (4.69%) Hedge funds
9 12 (4.33%) Management Information System
9 12 (4.33%) Self-Motivation
10 10 (3.61%) Mobile App
11 9 (3.25%) Mobile Payment
12 8 (2.89%) Credit Risk
12 8 (2.89%) Reference Data
12 8 (2.89%) Virtual Team
13 7 (2.53%) Clustering
13 7 (2.53%) Equities
14 5 (1.81%) Contract for Difference
14 5 (1.81%) Fixed Income
14 5 (1.81%) Spread Betting
Operating Systems
1 36 (13.00%) Linux
2 11 (3.97%) Unix
3 5 (1.81%) Android
4 4 (1.44%) Apple iOS
5 3 (1.08%) CentOS
6 2 (0.72%) Ubuntu
6 2 (0.72%) Windows
Processes & Methodologies
1 122 (44.04%) Agile Software Development
2 63 (22.74%) Multithreading
3 58 (20.94%) Analytics
4 56 (20.22%) Computer Science
5 46 (16.61%) Software Engineering
6 42 (15.16%) OO
7 40 (14.44%) DevOps
7 40 (14.44%) Problem-Solving
8 39 (14.08%) Performance Tuning
9 38 (13.72%) Multithreaded Programming
10 37 (13.36%) TDD
11 36 (13.00%) Machine Learning
11 36 (13.00%) Scrum
12 32 (11.55%) Business Intelligence
12 32 (11.55%) Continuous Integration
13 31 (11.19%) Test Automation
14 30 (10.83%) Data Modelling
15 29 (10.47%) ETL
16 28 (10.11%) SDLC
17 27 (9.75%) Low Latency
Programming Languages
1 99 (35.74%) Java
2 87 (31.41%) SQL
3 78 (28.16%) Python
4 48 (17.33%) C++
5 44 (15.88%) JavaScript
6 35 (12.64%) C#
7 25 (9.03%) Scala
8 17 (6.14%) Java 8
9 14 (5.05%) TypeScript
10 13 (4.69%) Kotlin
11 12 (4.33%) ES6
11 12 (4.33%) R
12 10 (3.61%) PL/SQL
13 8 (2.89%) C
14 7 (2.53%) PowerShell
15 5 (1.81%) Apple Swift
15 5 (1.81%) Haskell
15 5 (1.81%) Objective-C
15 5 (1.81%) Shell Script
15 5 (1.81%) T-SQL
Qualifications
1 18 (6.50%) Degree
2 16 (5.78%) Computer Science Degree
3 10 (3.61%) PhD
4 9 (3.25%) Security Cleared
5 7 (2.53%) SC Cleared
6 3 (1.08%) AWS Certification
7 2 (0.72%) Master's Degree
8 1 (0.36%) ISEB
Quality Assurance & Compliance
1 14 (5.05%) Data Quality
1 14 (5.05%) QA
2 2 (0.72%) Dodd-Frank
2 2 (0.72%) IFRS
2 2 (0.72%) IFRS 9
2 2 (0.72%) MiFID
2 2 (0.72%) Sarbanes-Oxley
System Software
1 22 (7.94%) Docker
2 2 (0.72%) Apache ZooKeeper
2 2 (0.72%) etcd
2 2 (0.72%) Varnish
3 1 (0.36%) Ceph
3 1 (0.36%) HDFS
3 1 (0.36%) ISA Server
Systems Management
1 26 (9.39%) Kubernetes
2 17 (6.14%) Terraform
3 7 (2.53%) Ansible
4 6 (2.17%) Puppet
5 3 (1.08%) Istio
5 3 (1.08%) MIIS
5 3 (1.08%) Opscode Chef
5 3 (1.08%) Prometheus
6 2 (0.72%) Consul
7 1 (0.36%) Hadoop YARN
7 1 (0.36%) Rundeck
7 1 (0.36%) Single Sign-On
Vendors
1 31 (11.19%) Microsoft
2 28 (10.11%) Oracle
3 19 (6.86%) Google
4 6 (2.17%) Databricks
5 4 (1.44%) Apple
6 3 (1.08%) Informatica
6 3 (1.08%) Splunk
7 2 (0.72%) Alteryx
7 2 (0.72%) Blue Prism
7 2 (0.72%) IBM
7 2 (0.72%) SAP
8 1 (0.36%) Ab Initio
8 1 (0.36%) Cloudera
8 1 (0.36%) DevExpress
8 1 (0.36%) hybris
8 1 (0.36%) Netezza
8 1 (0.36%) Rackspace
8 1 (0.36%) Salesforce.com
8 1 (0.36%) Talend
8 1 (0.36%) Teradata