Period
to 12 April 2021

The following table provides summary statistics for permanent job vacancies advertised in the City of London with a requirement for TDD skills. Included is a benchmarking guide to the salaries offered in vacancies that have cited TDD over the 6 months to 12 April 2021 with a comparison to the same period in the previous 2 years.

Test-Driven Development (TDD)
Central London > City of London
6 months to
12 Apr 2021
Same period 2020 Same period 2019
Rank 31 22 20
Rank change year-on-year -9 -2 -1
Permanent jobs citing TDD 363 699 929
As % of all permanent jobs advertised in the City of London 7.52% 8.26% 9.06%
As % of the Processes & Methodologies category 7.91% 8.79% 9.74%
Number of salaries quoted 340 656 890
10th Percentile £52,500 £50,000 £44,875
25th Percentile £62,500 £57,500 £56,563
Median annual salary (50th Percentile) £75,000 £70,000 £70,000
Median % change year-on-year +7.14% - +3.70%
75th Percentile £87,500 £87,500 £85,000
90th Percentile £97,500 £100,625 £97,500
Central London median annual salary £75,000 £72,500 £70,000
% change year-on-year +3.45% +3.57% +7.69%

TDD is in the Processes and Methodologies category. The following table is for comparison with the above and provides summary statistics for all permanent job vacancies advertised in the City of London with a requirement for process or methodology skills.

All Process and Methodology Skills
City of London
Permanent vacancies with a requirement for process or methodology skills 4,591 7,955 9,534
As % of all permanent IT jobs advertised in the City of London 95.17% 94.01% 92.93%
Number of salaries quoted 4,052 6,950 8,531
10th Percentile £43,750 £40,000 £36,250
25th Percentile £55,000 £51,250 £49,000
Median annual salary (50th Percentile) £72,500 £67,500 £65,000
Median % change year-on-year +7.41% +3.85% +5.69%
75th Percentile £89,000 £83,750 £82,500
90th Percentile £106,250 £98,875 £97,500
Central London median annual salary £70,000 £67,500 £65,000
% change year-on-year +3.70% +3.85% +8.33%

TDD
Job Vacancy Trend in the City of London

Job postings citing TDD as a proportion of all IT jobs advertised in the City of London.

Job vacancy trend for TDD in the City of London

TDD
Salary Trend in the City of London

3-month moving average salary quoted in jobs citing TDD in the City of London.

Salary trend for TDD in the City of London

TDD
Salary Histogram in the City of London

Salary distribution for jobs citing TDD in the City of London over the 6 months to 12 April 2021.

Salary histogram for TDD in the City of London

For the 6 months to 12 April 2021, IT jobs citing TDD also mentioned the following skills in order of popularity. The figures indicate the absolute number co-occurrences and as a proportion of all permanent job ads across the City of London region with a requirement for TDD.

1 246 (67.77%) Agile Software Development
2 154 (42.42%) Java
3 146 (40.22%) BDD
4 144 (39.67%) DevOps
5 126 (34.71%) Microservices
6 110 (30.30%) AWS
7 100 (27.55%) C#
8 98 (27.00%) Finance
9 82 (22.59%) JavaScript
10 80 (22.04%) .NET
11 76 (20.94%) SQL
11 76 (20.94%) Docker
12 73 (20.11%) Test Automation
13 72 (19.83%) Fintech
14 65 (17.91%) Python
15 64 (17.63%) Azure
15 64 (17.63%) React
16 63 (17.36%) Software Engineering
17 61 (16.80%) Continuous Integration
18 58 (15.98%) Kubernetes
19 57 (15.70%) OO
20 52 (14.33%) NoSQL
20 52 (14.33%) Node.js
21 51 (14.05%) Kafka
21 51 (14.05%) Scrum
22 48 (13.22%) Pair Programming
23 47 (12.95%) Java 8
24 46 (12.67%) Selenium
24 46 (12.67%) Jenkins
25 45 (12.40%) SOLID

TDD
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 9 (2.48%) Apache Spark
2 6 (1.65%) Elasticsearch
3 5 (1.38%) WordPress
4 3 (0.83%) Confluence
4 3 (0.83%) GlassFish
4 3 (0.83%) JBoss
4 3 (0.83%) SharePoint
4 3 (0.83%) WebSphere
5 2 (0.55%) Apache
6 1 (0.28%) Apache Airflow
6 1 (0.28%) Cloud Foundry
6 1 (0.28%) CMS
6 1 (0.28%) IIS
6 1 (0.28%) Moodle
6 1 (0.28%) Mule
6 1 (0.28%) OpenStack
6 1 (0.28%) Umbraco
Business Applications
1 3 (0.83%) IBM Operational Decision Manager
2 2 (0.55%) Dynamics CRM
Cloud Services
1 110 (30.30%) AWS
2 64 (17.63%) Azure
3 25 (6.89%) GCP
4 18 (4.96%) Serverless
5 15 (4.13%) NuGet
6 14 (3.86%) Azure Functions
7 13 (3.58%) Datadog
8 12 (3.31%) npm
9 10 (2.75%) PaaS
10 9 (2.48%) Amazon SageMaker
10 9 (2.48%) SaaS
11 5 (1.38%) Cloud Computing
11 5 (1.38%) GitHub
12 4 (1.10%) Power Platform
13 3 (0.83%) Amazon EC2
13 3 (0.83%) Heroku
14 2 (0.55%) AWS Lambda
14 2 (0.55%) Power Automate
14 2 (0.55%) PowerApps
14 2 (0.55%) Veeva
Communications & Networking
1 5 (1.38%) HTTP
2 1 (0.28%) AMQP
2 1 (0.28%) Intranet
Database & Business Intelligence
1 52 (14.33%) NoSQL
2 34 (9.37%) PostgreSQL
3 27 (7.44%) SQL Server
4 22 (6.06%) Hadoop
5 21 (5.79%) MongoDB
6 17 (4.68%) Big Data
7 16 (4.41%) Apache Cassandra
8 14 (3.86%) MySQL
9 13 (3.58%) Amazon DynamoDB
9 13 (3.58%) Azure SQL Database
10 9 (2.48%) Relational Database
11 6 (1.65%) Redis
12 4 (1.10%) Power BI
13 3 (0.83%) Amazon RDS
13 3 (0.83%) Oracle Database
14 2 (0.55%) Apache Hive
14 2 (0.55%) HDInsight
14 2 (0.55%) Qlik Sense
14 2 (0.55%) SQL Server Integration Services
14 2 (0.55%) SQL Server Reporting Services
Development Applications
1 46 (12.67%) Jenkins
1 46 (12.67%) Selenium
2 27 (7.44%) NUnit
3 24 (6.61%) Git (software)
3 24 (6.61%) TeamCity
4 19 (5.23%) SpecFlow
5 17 (4.68%) Visual Studio
6 16 (4.41%) Cucumber
7 15 (4.13%) Postman
8 13 (3.58%) Cypress.io
9 11 (3.03%) Protractor
10 8 (2.20%) Appium
10 8 (2.20%) JIRA
10 8 (2.20%) JUnit
11 7 (1.93%) Octopus Deploy
11 7 (1.93%) Rhino Mocks
12 6 (1.65%) Atlassian Bamboo
13 5 (1.38%) RSpec
13 5 (1.38%) webpack
14 4 (1.10%) GitLab
General
1 98 (27.00%) Finance
2 43 (11.85%) Banking
3 15 (4.13%) Games
4 14 (3.86%) Front Office
5 7 (1.93%) Investment Banking
6 6 (1.65%) Financial Institution
7 4 (1.10%) Back Office
7 4 (1.10%) Law
8 3 (0.83%) Housing Association
8 3 (0.83%) Marketing
9 2 (0.55%) Publishing
9 2 (0.55%) Retail
9 2 (0.55%) Telecoms
10 1 (0.28%) Public Sector
Job Titles
1 208 (57.30%) Developer
2 76 (20.94%) Java Developer
3 39 (10.74%) Senior Developer
4 37 (10.19%) .NET Developer
5 34 (9.37%) C# Developer
6 28 (7.71%) Python Developer
7 24 (6.61%) Senior Java Developer
8 23 (6.34%) C# .NET Developer
8 23 (6.34%) Full Stack Developer
9 21 (5.79%) Software Engineer
10 19 (5.23%) Lead Developer
11 17 (4.68%) Java Developer - Fintech
12 16 (4.41%) React Developer
13 14 (3.86%) JavaScript Developer
14 13 (3.58%) QA Engineer
15 11 (3.03%) Games Developer
15 11 (3.03%) Software Developer
16 10 (2.75%) AWS Developer
16 10 (2.75%) Java Engineer
17 9 (2.48%) Node.js Developer
Libraries, Frameworks & Software Standards
1 80 (22.04%) .NET
2 64 (17.63%) React
3 52 (14.33%) Node.js
4 51 (14.05%) Kafka
5 45 (12.40%) .NET Core
6 38 (10.47%) AngularJS
7 37 (10.19%) REST
8 33 (9.09%) CSS
8 33 (9.09%) Spring
9 32 (8.82%) Web Services
10 30 (8.26%) HTML
11 29 (7.99%) Spring Boot
12 27 (7.44%) Pandas
13 24 (6.61%) JSON
14 23 (6.34%) Django
15 19 (5.23%) HTML5
16 15 (4.13%) Redux
17 14 (3.86%) CSS3
17 14 (3.86%) RESTful
18 11 (3.03%) Gherkin
Miscellaneous
1 25 (6.89%) Greenfield Project
1 25 (6.89%) User Experience
2 22 (6.06%) Equities
3 20 (5.51%) Algorithms
4 12 (3.31%) Self-Motivation
5 11 (3.03%) Data Structures
6 10 (2.75%) Video\Live Streaming
7 8 (2.20%) Derivative
7 8 (2.20%) Mobile App
8 7 (1.93%) Cloud Native
8 7 (1.93%) Hybrid Cloud
9 6 (1.65%) Analytical Skills
9 6 (1.65%) Foreign Exchange (FX)
10 4 (1.10%) Fixed Income
10 4 (1.10%) Reference Data
11 3 (0.83%) Blog
11 3 (0.83%) Social Media
11 3 (0.83%) Virtual Team
12 2 (0.55%) Hedge funds
12 2 (0.55%) Linux Command Line
Operating Systems
1 45 (12.40%) Linux
2 7 (1.93%) Unix
3 5 (1.38%) Apple iOS
4 2 (0.55%) Android
4 2 (0.55%) Windows
Processes & Methodologies
1 246 (67.77%) Agile Software Development
2 146 (40.22%) BDD
3 144 (39.67%) DevOps
4 126 (34.71%) Microservices
5 73 (20.11%) Test Automation
6 72 (19.83%) Fintech
7 63 (17.36%) Software Engineering
8 61 (16.80%) Continuous Integration
9 57 (15.70%) OO
10 51 (14.05%) Scrum
11 48 (13.22%) Pair Programming
12 45 (12.40%) SOLID
13 34 (9.37%) Continuous Delivery
13 34 (9.37%) Software Testing
14 32 (8.82%) Mentoring
15 28 (7.71%) SDET
15 28 (7.71%) SDLC
16 24 (6.61%) Data Science
17 23 (6.34%) API Integration
17 23 (6.34%) Machine Learning
Programming Languages
1 154 (42.42%) Java
2 100 (27.55%) C#
3 82 (22.59%) JavaScript
4 76 (20.94%) SQL
5 65 (17.91%) Python
6 47 (12.95%) Java 8
7 45 (12.40%) Kotlin
8 34 (9.37%) Scala
9 32 (8.82%) TypeScript
10 23 (6.34%) C++
11 17 (4.68%) PHP
12 10 (2.75%) Clojure
13 9 (2.48%) C
13 9 (2.48%) R
14 8 (2.20%) Ruby
15 6 (1.65%) Go
16 5 (1.38%) ES6
16 5 (1.38%) T-SQL
17 4 (1.10%) Perl
17 4 (1.10%) PowerShell
Qualifications
1 36 (9.92%) Degree
2 9 (2.48%) PhD
3 8 (2.20%) Computer Science Degree
3 8 (2.20%) ISTQB
4 2 (0.55%) Master's Degree
5 1 (0.28%) AWS Certification
5 1 (0.28%) Numerate Degree
Quality Assurance & Compliance
1 44 (12.12%) QA
2 2 (0.55%) GDPR
2 2 (0.55%) ISO 20022
System Software
1 76 (20.94%) Docker
2 1 (0.28%) Apache ZooKeeper
2 1 (0.28%) HDFS
Systems Management
1 58 (15.98%) Kubernetes
2 30 (8.26%) Puppet
3 15 (4.13%) Terraform
4 13 (3.58%) Kibana
5 9 (2.48%) Ansible
6 5 (1.38%) Opscode Chef
7 2 (0.55%) Salt
8 1 (0.28%) MIIS
Vendors
1 20 (5.51%) Microsoft
2 9 (2.48%) Salesforce.com
3 7 (1.93%) Oracle
4 5 (1.38%) IBM
5 4 (1.10%) Solace
6 2 (0.55%) Xamarin
7 1 (0.28%) Cloudera
7 1 (0.28%) Databricks
7 1 (0.28%) Facebook
7 1 (0.28%) Google
7 1 (0.28%) Guidewire
7 1 (0.28%) Talend