Period
to 19 September 2021

The following table provides summary statistics for contract job vacancies advertised in the City of London with a requirement for Kotlin skills. Included is a benchmarking guide to the contractor rates offered in vacancies that have cited Kotlin over the 6 months to 19 September 2021 with a comparison to the same period in 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.

JetBrains Kotlin
Central London > City of London
6 months to
19 Sep 2021
Same period 2020 Same period 2019
Rank 110 86 165
Rank change year-on-year -24 +79 +15
Contract jobs citing Kotlin 56 39 72
As % of all contract jobs advertised in the City of London 1.56% 2.22% 1.15%
As % of the Programming Languages category 3.35% 4.62% 2.34%
Number of daily rates quoted 51 38 66
10th Percentile £500 £455 £456
25th Percentile £525 £481 £488
Median daily rate (50th Percentile) £608 £550 £600
Median % change year-on-year +10.45% -8.33% -
75th Percentile £668 £638 £682
90th Percentile £750 £688 £744
Central London median daily rate £606 £550 £588
% change year-on-year +10.23% -6.38% -2.08%
Number of hourly rates quoted 2 0 0
Median hourly rate £52.50 - -
Central London median hourly rate £52.50 - -

Kotlin is in the Programming Languages 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 coding skills.

All Programming Languages
City of London
Contract vacancies with a requirement for coding skills 1,671 845 3,078
As % of all contract IT jobs advertised in the City of London 46.61% 48.12% 49.17%
Number of daily rates quoted 1,297 644 2,529
10th Percentile £403 £375 £400
25th Percentile £481 £437 £463
Median daily rate (50th Percentile) £600 £525 £525
Median % change year-on-year +14.29% - -
75th Percentile £675 £616 £625
90th Percentile £770 £688 £680
Central London median daily rate £599 £525 £525
% change year-on-year +14.05% - -
Number of hourly rates quoted 10 7 16
10th Percentile £26.15 £22.90 £15.75
25th Percentile £32.00 £28.13 £21.00
Median hourly rate £36.50 £36.00 £21.25
Median % change year-on-year +1.39% +69.41% -3.41%
75th Percentile £61.56 £39.63 £39.84
90th Percentile £67.98 £46.60 £50.19
Central London median hourly rate £35.00 £36.00 £21.25
% change year-on-year -2.78% +69.41% -3.41%

Kotlin
Job Vacancy Trend in the City of London

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

Job vacancy trend for Kotlin in the City of London

Kotlin
Contractor Daily Rate Trend in the City of London

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

Daily rate trend for Kotlin in the City of London

Kotlin
Daily Rate Histogram in the City of London

Daily rate distribution for jobs citing Kotlin in the City of London over the 6 months to 19 September 2021.

Daily rate histogram for Kotlin in the City of London

Kotlin
Hourly Rate Histogram in the City of London

Hourly rate distribution of jobs citing Kotlin in the City of London over the 6 months to 19 September 2021.

Hourly rate histogram for Kotlin in the City of London

For the 6 months to 19 September 2021, IT contractor jobs citing Kotlin 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 Kotlin.

1 31 (55.36%) Java
2 29 (51.79%) TDD
3 27 (48.21%) Greenfield Project
4 23 (41.07%) Spring
4 23 (41.07%) RESTful
5 22 (39.29%) Games
6 19 (33.93%) Agile Software Development
6 19 (33.93%) GraphQL
7 18 (32.14%) Fintech
7 18 (32.14%) Microservices
8 11 (19.64%) Software Engineering
9 9 (16.07%) Scala
10 8 (14.29%) AngularJS
10 8 (14.29%) DevOps
10 8 (14.29%) Git (software)
10 8 (14.29%) JavaScript
10 8 (14.29%) HTML
11 7 (12.50%) CSS
11 7 (12.50%) Android
11 7 (12.50%) TypeScript
11 7 (12.50%) React
12 6 (10.71%) Docker
12 6 (10.71%) RxJava
12 6 (10.71%) Mobile App
12 6 (10.71%) HTML5
12 6 (10.71%) CSS3
13 5 (8.93%) Jenkins
13 5 (8.93%) JUnit
13 5 (8.93%) Finance
14 4 (7.14%) MVC

Kotlin
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 1 (1.79%) Confluence
Cloud Services
1 4 (7.14%) AWS
1 4 (7.14%) Azure
2 3 (5.36%) AWS CloudFormation
2 3 (5.36%) npm
3 1 (1.79%) Amazon EKS
3 1 (1.79%) Datadog
3 1 (1.79%) GCP
Communications & Networking
1 1 (1.79%) HTTP
Database & Business Intelligence
1 1 (1.79%) Couchbase
1 1 (1.79%) NoSQL
1 1 (1.79%) RDBMS
1 1 (1.79%) Redis
1 1 (1.79%) Relational Database
1 1 (1.79%) SQL Server
Development Applications
1 8 (14.29%) Git (software)
2 5 (8.93%) Jenkins
2 5 (8.93%) JUnit
3 4 (7.14%) webpack
4 3 (5.36%) Android Studio
4 3 (5.36%) Bower
4 3 (5.36%) Charles Proxy
4 3 (5.36%) Grunt
5 2 (3.57%) Calabash
5 2 (3.57%) Crashlytics
5 2 (3.57%) Gradle
5 2 (3.57%) Mockito
5 2 (3.57%) TeamCity
6 1 (1.79%) Atlassian Bamboo
6 1 (1.79%) CircleCI
6 1 (1.79%) fastlane
6 1 (1.79%) GitLab
6 1 (1.79%) JIRA
6 1 (1.79%) Maven
6 1 (1.79%) Redmine
General
1 22 (39.29%) Games
2 5 (8.93%) Finance
3 3 (5.36%) Analytical Skills
3 3 (5.36%) Banking
3 3 (5.36%) Investment Banking
4 2 (3.57%) Publishing
4 2 (3.57%) Social Skills
Job Titles
1 45 (80.36%) Developer
2 9 (16.07%) Java Developer
3 4 (7.14%) Android Developer
3 4 (7.14%) Senior Developer
4 3 (5.36%) Android Engineer
4 3 (5.36%) Lead Developer
4 3 (5.36%) Lead PHP Developer
4 3 (5.36%) Mobile Tester
4 3 (5.36%) PHP Developer
4 3 (5.36%) React Developer
4 3 (5.36%) Software Tester
4 3 (5.36%) Tester
5 2 (3.57%) Investment Banking Java Developer
5 2 (3.57%) Python Developer
5 2 (3.57%) Senior Android Developer
5 2 (3.57%) Software Engineer
6 1 (1.79%) Android Software Engineer
6 1 (1.79%) Full Stack Developer
6 1 (1.79%) Java Engineer
6 1 (1.79%) Senior Java Engineer
Libraries, Frameworks & Software Standards
1 23 (41.07%) RESTful
1 23 (41.07%) Spring
2 19 (33.93%) GraphQL
3 8 (14.29%) AngularJS
3 8 (14.29%) HTML
4 7 (12.50%) CSS
4 7 (12.50%) React
5 6 (10.71%) CSS3
5 6 (10.71%) HTML5
5 6 (10.71%) RxJava
6 4 (7.14%) Android SDK
6 4 (7.14%) Kafka
6 4 (7.14%) React Native
6 4 (7.14%) Sass
6 4 (7.14%) Spring Boot
6 4 (7.14%) Vue.js
7 3 (5.36%) Dagger
7 3 (5.36%) LEMP Stack
7 3 (5.36%) LESS
7 3 (5.36%) Vuetify.js
Miscellaneous
1 27 (48.21%) Greenfield Project
2 6 (10.71%) Mobile App
3 3 (5.36%) Foreign Exchange (FX)
3 3 (5.36%) User Experience
4 2 (3.57%) Derivative
4 2 (3.57%) Equity Derivative
5 1 (1.79%) Equities
Operating Systems
1 7 (12.50%) Android
Processes & Methodologies
1 29 (51.79%) TDD
2 19 (33.93%) Agile Software Development
3 18 (32.14%) Fintech
3 18 (32.14%) Microservices
4 11 (19.64%) Software Engineering
5 8 (14.29%) DevOps
6 4 (7.14%) Android Development
6 4 (7.14%) Full Stack Development
6 4 (7.14%) Multithreading
6 4 (7.14%) MVC
6 4 (7.14%) MVVM
6 4 (7.14%) Web Development
7 3 (5.36%) Acceptance Criteria
7 3 (5.36%) E-business
7 3 (5.36%) OWASP
7 3 (5.36%) Scrum
7 3 (5.36%) SDET
7 3 (5.36%) Software Architecture
7 3 (5.36%) Software Testing
7 3 (5.36%) Test Automation
Programming Languages
1 31 (55.36%) Java
2 9 (16.07%) Scala
3 8 (14.29%) JavaScript
4 7 (12.50%) TypeScript
5 3 (5.36%) Bash Shell
5 3 (5.36%) Java 8
5 3 (5.36%) PHP
5 3 (5.36%) Python
6 2 (3.57%) C#
6 2 (3.57%) Objective-C
6 2 (3.57%) SQL
7 1 (1.79%) Go
Quality Assurance & Compliance
1 2 (3.57%) Accessibility
1 2 (3.57%) QA
1 2 (3.57%) WCAG
System Software
1 6 (10.71%) Docker
Systems Management
1 4 (7.14%) Kubernetes
2 2 (3.57%) Bugsnag
3 1 (1.79%) Ansible
3 1 (1.79%) Opscode Chef
3 1 (1.79%) Puppet
3 1 (1.79%) Terraform
Vendors
1 2 (3.57%) CA
1 2 (3.57%) CA Agile Central
1 2 (3.57%) Solace
2 1 (1.79%) Confluent
2 1 (1.79%) Google
2 1 (1.79%) Oracle