Period
to 25 June 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 25 June 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
25 Jun 2021
Same period 2020 Same period 2019
Rank 40 21 28
Rank change year-on-year -19 +7 -5
Permanent jobs citing TDD 332 548 821
As % of all permanent jobs advertised in the City of London 6.22% 8.98% 8.10%
As % of the Processes & Methodologies category 6.54% 9.53% 8.67%
Number of salaries quoted 321 518 774
10th Percentile £53,750 £50,000 £45,000
25th Percentile £66,250 £57,500 £55,313
Median annual salary (50th Percentile) £77,500 £72,500 £70,000
Median % change year-on-year +6.90% +3.57% -
75th Percentile £92,500 £87,500 £85,000
90th Percentile £97,500 £97,875 £93,750
Central London median annual salary £77,500 £72,500 £70,000
% change year-on-year +6.90% +3.57% +3.70%

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 5,078 5,748 9,467
As % of all permanent IT jobs advertised in the City of London 95.09% 94.21% 93.46%
Number of salaries quoted 4,530 5,037 8,435
10th Percentile £43,750 £41,250 £37,500
25th Percentile £55,000 £52,500 £50,000
Median annual salary (50th Percentile) £72,500 £70,000 £65,000
Median % change year-on-year +3.57% +7.69% +4.00%
75th Percentile £90,000 £85,000 £82,500
90th Percentile £106,250 £97,500 £97,500
Central London median annual salary £70,000 £70,000 £65,000
% change year-on-year - +7.69% +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 25 June 2021.

Salary histogram for TDD in the City of London

For the 6 months to 25 June 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.

1 235 (70.78%) Agile Software Development
2 147 (44.28%) Java
3 143 (43.07%) Microservices
4 126 (37.95%) DevOps
5 111 (33.43%) BDD
6 104 (31.33%) C#
7 100 (30.12%) SQL
8 97 (29.22%) Software Engineering
9 95 (28.61%) .NET
10 92 (27.71%) Finance
11 91 (27.41%) AWS
12 77 (23.19%) JavaScript
12 77 (23.19%) Docker
13 74 (22.29%) Fintech
14 69 (20.78%) Kubernetes
15 65 (19.58%) Continuous Integration
16 64 (19.28%) Azure
17 63 (18.98%) Scrum
18 60 (18.07%) Test Automation
18 60 (18.07%) React
19 57 (17.17%) .NET Core
20 56 (16.87%) Spring
21 55 (16.57%) NoSQL
21 55 (16.57%) Kafka
21 55 (16.57%) Java 8
22 51 (15.36%) SOLID
23 50 (15.06%) OO
23 50 (15.06%) Mentoring
23 50 (15.06%) Social Skills
24 47 (14.16%) Web Services

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 14 (4.22%) Apache Spark
2 9 (2.71%) Elasticsearch
3 8 (2.41%) Confluence
4 7 (2.11%) CMS
5 6 (1.81%) Apache Solr
5 6 (1.81%) Drupal
5 6 (1.81%) SharePoint
6 5 (1.51%) WordPress
7 4 (1.20%) GlassFish
7 4 (1.20%) JBoss
7 4 (1.20%) Tomcat
7 4 (1.20%) WebSphere
8 3 (0.90%) OpenStack
9 2 (0.60%) Cloud Foundry
9 2 (0.60%) Oracle SOA Suite
9 2 (0.60%) SAS
10 1 (0.30%) Apache
10 1 (0.30%) IIS
10 1 (0.30%) Oracle Coherence
10 1 (0.30%) Umbraco
Business Applications
1 4 (1.20%) IBM Operational Decision Manager
2 3 (0.90%) Dynamics CRM
3 1 (0.30%) Salesforce.com CRM
Cloud Services
1 91 (27.41%) AWS
2 64 (19.28%) Azure
3 26 (7.83%) Serverless
4 24 (7.23%) GCP
5 20 (6.02%) Azure Functions
6 17 (5.12%) Azure Service Bus
6 17 (5.12%) SaaS
7 16 (4.82%) Azure App Service
7 16 (4.82%) Azure Event Grid
7 16 (4.82%) Azure Service Fabric
7 16 (4.82%) NuGet
8 8 (2.41%) PaaS
9 7 (2.11%) Amazon EC2
10 6 (1.81%) Amazon EKS
10 6 (1.81%) Power Platform
11 5 (1.51%) Amazon ECS
12 4 (1.20%) Datadog
12 4 (1.20%) GitHub
13 3 (0.90%) Amazon Kinesis
13 3 (0.90%) AWS Lambda
Communications & Networking
1 5 (1.51%) HTTP
2 4 (1.20%) AMQP
3 1 (0.30%) Intranet
3 1 (0.30%) Network Security
Database & Business Intelligence
1 55 (16.57%) NoSQL
2 27 (8.13%) MongoDB
3 25 (7.53%) SQL Server
4 21 (6.33%) Azure SQL Database
5 20 (6.02%) Apache Cassandra
5 20 (6.02%) PostgreSQL
6 18 (5.42%) Big Data
7 17 (5.12%) Hadoop
8 16 (4.82%) Amazon DynamoDB
9 14 (4.22%) MySQL
10 9 (2.71%) Redis
11 6 (1.81%) HBase
11 6 (1.81%) Power BI
12 5 (1.51%) Relational Database
13 4 (1.20%) SQL Server Integration Services
13 4 (1.20%) SQL Server Reporting Services
14 3 (0.90%) Amazon RDS
14 3 (0.90%) Data Warehouse
14 3 (0.90%) MariaDB
14 3 (0.90%) Oracle Database
Development Applications
1 40 (12.05%) Git (software)
2 29 (8.73%) Jenkins
3 28 (8.43%) NUnit
4 27 (8.13%) TeamCity
5 26 (7.83%) Selenium
6 19 (5.72%) JIRA
7 15 (4.52%) Octopus Deploy
8 14 (4.22%) Rhino Mocks
8 14 (4.22%) Visual Studio
9 11 (3.31%) SpecFlow
10 9 (2.71%) Cucumber
10 9 (2.71%) JUnit
10 9 (2.71%) Maven
11 8 (2.41%) Atlassian Bamboo
11 8 (2.41%) webpack
12 7 (2.11%) Postman
13 6 (1.81%) Mockito
14 5 (1.51%) Artifactory
14 5 (1.51%) Moq
14 5 (1.51%) WebDriver
General
1 92 (27.71%) Finance
2 50 (15.06%) Social Skills
3 42 (12.65%) Banking
4 12 (3.61%) Investment Banking
5 11 (3.31%) Analytical Skills
5 11 (3.31%) Front Office
6 6 (1.81%) Financial Institution
6 6 (1.81%) Games
7 5 (1.51%) Retail
8 4 (1.20%) Public Speaking
9 3 (0.90%) Telecoms
10 2 (0.60%) Organisational Skills
10 2 (0.60%) Publishing
11 1 (0.30%) Documentation Skills
11 1 (0.30%) Law
11 1 (0.30%) Public Sector
Job Titles
1 194 (58.43%) Developer
2 83 (25.00%) Java Developer
3 58 (17.47%) Senior Developer
4 51 (15.36%) .NET Developer
5 41 (12.35%) C# Developer
6 39 (11.75%) Software Engineer
7 35 (10.54%) C# .NET Developer
8 34 (10.24%) Lead Developer
9 24 (7.23%) Java Developer - Fintech
10 23 (6.93%) Senior Java Developer
11 18 (5.42%) Senior Software Engineer
12 16 (4.82%) Java Engineer
12 16 (4.82%) Lead Java Developer
13 15 (4.52%) Software Developer
14 14 (4.22%) Lead .NET Developer
14 14 (4.22%) Senior .NET Developer
15 12 (3.61%) React Developer
15 12 (3.61%) Senior C# .NET Developer
15 12 (3.61%) Senior C# Developer
16 11 (3.31%) C# Software Developer
Libraries, Frameworks & Software Standards
1 95 (28.61%) .NET
2 60 (18.07%) React
3 57 (17.17%) .NET Core
4 56 (16.87%) Spring
5 55 (16.57%) Kafka
6 47 (14.16%) Web Services
7 46 (13.86%) Node.js
8 43 (12.95%) Spring Boot
9 40 (12.05%) AngularJS
10 37 (11.14%) CSS
10 37 (11.14%) HTML
11 35 (10.54%) REST
12 19 (5.72%) RESTful
13 16 (4.82%) Redux
14 13 (3.92%) ASP.NET
14 13 (3.92%) HTML5
14 13 (3.92%) JSON
15 12 (3.61%) Hibernate
15 12 (3.61%) RabbitMQ
16 10 (3.01%) .NET Framework
Miscellaneous
1 22 (6.63%) Self-Motivation
2 21 (6.33%) User Experience
3 16 (4.82%) Greenfield Project
4 14 (4.22%) Hybrid Cloud
5 12 (3.61%) Video\Live Streaming
6 9 (2.71%) Mobile App
7 8 (2.41%) Data Structures
7 8 (2.41%) Hedge funds
8 7 (2.11%) Derivative
8 7 (2.11%) Enterprise Software
8 7 (2.11%) Equities
9 6 (1.81%) Foreign Exchange (FX)
10 5 (1.51%) Algorithms
10 5 (1.51%) Cloud Native
10 5 (1.51%) Social Media
11 3 (0.90%) Blog
11 3 (0.90%) Client/Server
11 3 (0.90%) Data Centre
11 3 (0.90%) Private Cloud
12 2 (0.60%) W3C
Operating Systems
1 22 (6.63%) Linux
2 4 (1.20%) Unix
3 2 (0.60%) Apple iOS
3 2 (0.60%) Mac OS X
4 1 (0.30%) Windows
Processes & Methodologies
1 235 (70.78%) Agile Software Development
2 143 (43.07%) Microservices
3 126 (37.95%) DevOps
4 111 (33.43%) BDD
5 97 (29.22%) Software Engineering
6 74 (22.29%) Fintech
7 65 (19.58%) Continuous Integration
8 63 (18.98%) Scrum
9 60 (18.07%) Test Automation
10 51 (15.36%) SOLID
11 50 (15.06%) Mentoring
11 50 (15.06%) OO
12 45 (13.55%) Continuous Delivery
13 36 (10.84%) Software Testing
14 35 (10.54%) Multithreading
15 29 (8.73%) Analytics
15 29 (8.73%) Pair Programming
15 29 (8.73%) SDLC
16 28 (8.43%) Coaching
17 24 (7.23%) CQRS
Programming Languages
1 147 (44.28%) Java
2 104 (31.33%) C#
3 100 (30.12%) SQL
4 77 (23.19%) JavaScript
5 55 (16.57%) Java 8
6 44 (13.25%) Python
7 35 (10.54%) Kotlin
8 27 (8.13%) TypeScript
9 19 (5.72%) Scala
10 10 (3.01%) C++
10 10 (3.01%) PHP
11 7 (2.11%) PowerShell
11 7 (2.11%) Ruby
12 6 (1.81%) Clojure
13 5 (1.51%) ES6
14 4 (1.20%) PL/SQL
14 4 (1.20%) Shell Script
14 4 (1.20%) T-SQL
15 3 (0.90%) C
15 3 (0.90%) Go
Qualifications
1 22 (6.63%) Degree
2 9 (2.71%) ISTQB
3 3 (0.90%) ISTQB Foundation Certification
4 2 (0.60%) Computer Science Degree
4 2 (0.60%) ISTQB Advanced Certification
5 1 (0.30%) AWS Certification
5 1 (0.30%) DBS Check
5 1 (0.30%) SANS
Quality Assurance & Compliance
1 38 (11.45%) QA
2 3 (0.90%) Accessibility
2 3 (0.90%) GDPR
2 3 (0.90%) ISO 20022
3 1 (0.30%) Data Quality
System Software
1 77 (23.19%) Docker
2 3 (0.90%) Apache ZooKeeper
3 1 (0.30%) HDFS
Systems Management
1 69 (20.78%) Kubernetes
2 9 (2.71%) Puppet
3 7 (2.11%) Opscode Chef
3 7 (2.11%) Terraform
4 5 (1.51%) Ansible
4 5 (1.51%) Kibana
5 2 (0.60%) Grafana
6 1 (0.30%) MIIS
6 1 (0.30%) Prometheus
6 1 (0.30%) Salt
Vendors
1 27 (8.13%) Microsoft
2 9 (2.71%) Oracle
3 8 (2.41%) IBM
4 4 (1.20%) Salesforce.com
5 2 (0.60%) Databricks
5 2 (0.60%) Facebook
5 2 (0.60%) Google
6 1 (0.30%) Actuate
6 1 (0.30%) Atlassian
6 1 (0.30%) Cloudera
6 1 (0.30%) Cognos
6 1 (0.30%) Dynatrace
6 1 (0.30%) HP
6 1 (0.30%) Murex
6 1 (0.30%) Netezza
6 1 (0.30%) New Relic
6 1 (0.30%) Teradata
6 1 (0.30%) VMware