Period
to 22 April 2021

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 22 April 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
Central London > City of London
6 months to
22 Apr 2021
Same period 2020 Same period 2019
Rank 111 125 153
Rank change year-on-year +14 +28 +30
Contract jobs citing Data Structures 29 43 95
As % of all contract jobs advertised in the City of London 1.16% 1.13% 1.41%
As % of the Miscellaneous category 2.92% 3.20% 3.80%
Number of daily rates quoted 27 23 68
10th Percentile £465 £350 £409
25th Percentile £563 £402 £484
Median daily rate (50th Percentile) £600 £475 £568
Median % change year-on-year +26.32% -16.30% +10.73%
75th Percentile £614 £566 £600
90th Percentile £660 £700 £666
Central London median daily rate £600 £506 £568
% change year-on-year +18.52% -10.79% +10.73%
Number of hourly rates quoted 0 1 0
Median hourly rate - £57.50 -
Central London median hourly rate - £57.50 -

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 993 1,343 2,500
As % of all contract IT jobs advertised in the City of London 39.72% 35.25% 37.24%
Number of daily rates quoted 688 975 1,849
10th Percentile £340 £276 £313
25th Percentile £435 £413 £425
Median daily rate (50th Percentile) £550 £520 £525
Median % change year-on-year +5.77% -0.95% -
75th Percentile £650 £625 £625
90th Percentile £725 £694 £688
Central London median daily rate £550 £500 £525
% change year-on-year +10.00% -4.76% +1.94%
Number of hourly rates quoted 12 45 44
10th Percentile £11.59 £12.42 £12.58
25th Percentile £12.38 £14.38 £16.19
Median hourly rate £16.03 £25.00 £18.98
Median % change year-on-year -35.90% +31.75% -11.18%
75th Percentile £23.75 £38.75 £33.13
90th Percentile £36.13 £52.25 £37.50
Central London median hourly rate £18.99 £25.00 £20.00
% change year-on-year -24.05% +25.00% -4.76%

Data Structures
Job Vacancy Trend in the City of London

Job postings citing Data Structures as a proportion 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

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

Daily rate trend for Data Structures in the City of London

Data Structures
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing Data Structures in the City of London over the 6 months to 22 April 2021.

Daily rate histogram for Data Structures in the City of London

Data Structures
Contractor Hourly Rate Trend in the City of London

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

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 22 April 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
London Bridge - 6 £600 -
Data Structures
Central London

For the 6 months to 22 April 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 City of London region with a requirement for Data Structures.

1 17 (58.62%) SQL
2 16 (55.17%) Finance
2 16 (55.17%) Agile Software Development
2 16 (55.17%) Analytical Skills
3 15 (51.72%) Banking
4 12 (41.38%) Data Analysis
4 12 (41.38%) Algorithms
5 11 (37.93%) AWS
5 11 (37.93%) Python
5 11 (37.93%) Apache Spark
6 10 (34.48%) Java
6 10 (34.48%) Use Case
6 10 (34.48%) Multithreading
6 10 (34.48%) Big Data
6 10 (34.48%) Kafka
7 9 (31.03%) Amazon Kinesis
7 9 (31.03%) Spring
7 9 (31.03%) HTML
7 9 (31.03%) Data Warehouse
7 9 (31.03%) Change Management
8 8 (27.59%) Parquet
8 8 (27.59%) Data Lake
8 8 (27.59%) Continuous Deployment
8 8 (27.59%) SQL Optimisation
8 8 (27.59%) Forensic Analysis
8 8 (27.59%) Apache Airflow
8 8 (27.59%) Self-Motivation
8 8 (27.59%) Snowflake Schema
8 8 (27.59%) HTTP
8 8 (27.59%) Web Services

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 11 (37.93%) Apache Spark
2 8 (27.59%) Apache Airflow
3 2 (6.90%) Oracle Coherence
Applications
1 3 (10.34%) Microsoft Excel
Business Applications
1 1 (3.45%) Loan IQ
Cloud Services
1 11 (37.93%) AWS
2 9 (31.03%) Amazon Kinesis
3 3 (10.34%) Power Platform
4 1 (3.45%) Amazon ECS
4 1 (3.45%) Amazon ElastiCache
4 1 (3.45%) AWS CloudFormation
4 1 (3.45%) Azure
4 1 (3.45%) PaaS
4 1 (3.45%) SaaS
Communications & Networking
1 8 (27.59%) HTTP
Database & Business Intelligence
1 10 (34.48%) Big Data
2 9 (31.03%) Data Warehouse
3 8 (27.59%) Data Lake
3 8 (27.59%) Parquet
3 8 (27.59%) Snowflake Schema
4 4 (13.79%) Hazelcast
4 4 (13.79%) Redis
5 3 (10.34%) Hadoop
5 3 (10.34%) MS Access
5 3 (10.34%) Power BI
6 2 (6.90%) PostgreSQL
7 1 (3.45%) OLTP
7 1 (3.45%) Oracle Database
7 1 (3.45%) Oracle Database 11g
7 1 (3.45%) Oracle Database 12c
7 1 (3.45%) RDBMS
7 1 (3.45%) Relational Database
7 1 (3.45%) Tableau
Development Applications
1 1 (3.45%) Git (software)
1 1 (3.45%) Jenkins
1 1 (3.45%) JIRA
1 1 (3.45%) Visual Studio
1 1 (3.45%) Visual Studio Team System
General
1 16 (55.17%) Finance
2 15 (51.72%) Banking
3 6 (20.69%) Investment Banking
4 4 (13.79%) Front Office
5 3 (10.34%) Financial Institution
5 3 (10.34%) Retail
Job Titles
1 13 (44.83%) Developer
2 10 (34.48%) Java Developer
3 9 (31.03%) Data Engineer
4 6 (20.69%) Oracle Developer
5 5 (17.24%) Analyst
5 5 (17.24%) Python Engineer
6 4 (13.79%) Business Analyst
7 3 (10.34%) Banking Analyst
7 3 (10.34%) Banking Business Analyst
7 3 (10.34%) Senior Data Engineer
8 2 (6.90%) Architect
8 2 (6.90%) Data Business Analyst
8 2 (6.90%) Python Developer
8 2 (6.90%) Report Analyst
9 1 (3.45%) Business IT Analyst
9 1 (3.45%) Data Architect
9 1 (3.45%) IT Manager
9 1 (3.45%) Project Manager
9 1 (3.45%) Solutions Architect
9 1 (3.45%) Technical Architect
Libraries, Frameworks & Software Standards
1 10 (34.48%) Kafka
2 9 (31.03%) HTML
2 9 (31.03%) Spring
3 8 (27.59%) PostGIS
3 8 (27.59%) Web Services
3 8 (27.59%) XML
4 5 (17.24%) Spring Boot
5 4 (13.79%) Memcached
5 4 (13.79%) RESTful
6 3 (10.34%) REST
7 1 (3.45%) FIX Protocol
7 1 (3.45%) HTML5
7 1 (3.45%) Lambda Expressions
7 1 (3.45%) NumPy
7 1 (3.45%) Pandas
7 1 (3.45%) Redux
Miscellaneous
1 16 (55.17%) Analytical Skills
2 12 (41.38%) Algorithms
3 8 (27.59%) Self-Motivation
4 5 (17.24%) Management Information System
5 3 (10.34%) Derivative
6 1 (3.45%) Clustering
6 1 (3.45%) Credit Risk
6 1 (3.45%) Enterprise Software
6 1 (3.45%) Fixed Income
6 1 (3.45%) Foreign Exchange (FX)
6 1 (3.45%) Reference Data
Processes & Methodologies
1 16 (55.17%) Agile Software Development
2 12 (41.38%) Data Analysis
3 10 (34.48%) Multithreading
3 10 (34.48%) Use Case
4 9 (31.03%) Change Management
5 8 (27.59%) Continuous Deployment
5 8 (27.59%) Forensic Analysis
5 8 (27.59%) Load Testing
5 8 (27.59%) Machine Learning
5 8 (27.59%) MapReduce
5 8 (27.59%) SQL Optimisation
5 8 (27.59%) XML Parsing
6 7 (24.14%) DevOps
7 6 (20.69%) Analytics
8 5 (17.24%) API Design
8 5 (17.24%) Performance Tuning
9 4 (13.79%) API Development
9 4 (13.79%) Business Intelligence
9 4 (13.79%) Functional Programming
10 3 (10.34%) BDD
Programming Languages
1 17 (58.62%) SQL
2 11 (37.93%) Python
3 10 (34.48%) Java
4 7 (24.14%) Scala
5 6 (20.69%) Java 8
6 4 (13.79%) Haskell
6 4 (13.79%) PL/SQL
7 1 (3.45%) JavaScript
Qualifications
1 1 (3.45%) Degree
1 1 (3.45%) Master's Degree
Quality Assurance & Compliance
1 2 (6.90%) IFRS
2 1 (3.45%) Data Quality
2 1 (3.45%) GDPR
2 1 (3.45%) QA
Vendors
1 7 (24.14%) Oracle
2 1 (3.45%) Cloudera
2 1 (3.45%) Microsoft