Period
to 4 April 2020

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 4 April 2020 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
4 Apr 2020
Same period 2019 Same period 2018
Rank 119 169 215
Rank change year-on-year +50 +46 +13
Contract jobs citing Kotlin 58 80 40
As % of all contract jobs advertised in the City of London 1.39% 1.18% 0.56%
As % of the Programming Languages category 2.82% 2.28% 1.05%
Number of daily rates quoted 52 73 39
Median daily rate £515 £580 £613
Median daily rate % change year-on-year -11.21% -5.31% -2.00%
10th Percentile £379 £424 £510
90th Percentile £638 £745 £725
Central London median daily rate £538 £580 £575
% change year-on-year -7.33% +0.87% -8.00%
Number of hourly rates quoted 2 0 0
Median hourly rate £55.00 - -
Central London median hourly rate £55.00 - -

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 2,057 3,502 3,799
As % of all contract IT jobs advertised in the City of London 49.35% 51.65% 53.57%
Number of daily rates quoted 1,602 2,839 3,242
Median daily rate £525 £525 £525
10th Percentile £381 £400 £363
90th Percentile £688 £675 £713
Central London median daily rate £525 £525 £513
% change year-on-year - +2.44% +7.89%
Number of hourly rates quoted 18 15 19
Median hourly rate £36.75 £22.50 £21.50
Median hourly rate % change year-on-year +63.33% +4.65% -24.15%
10th Percentile £24.50 £18.28 £15.95
90th Percentile £58.63 £56.50 £52.10
Median hourly rate £35.00 £28.75 £21.50
% change year-on-year +21.74% +33.72% -24.15%

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 4 April 2020.

Daily rate histogram for Kotlin in the City of London

For the 6 months to 4 April 2020, 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 40 (68.97%) Java
2 29 (50.00%) Agile Software Development
3 26 (44.83%) Android
4 22 (37.93%) Spring
5 21 (36.21%) Android Development
5 21 (36.21%) RxJava
6 20 (34.48%) TDD
7 18 (31.03%) RESTful
8 16 (27.59%) Git (software)
9 13 (22.41%) JavaScript
9 13 (22.41%) Microservices
10 12 (20.69%) User Experience
10 12 (20.69%) Greenfield Project
10 12 (20.69%) Mobile App
11 11 (18.97%) Jenkins
11 11 (18.97%) Apple iOS
11 11 (18.97%) GitHub
11 11 (18.97%) JUnit
12 9 (15.52%) HTML
12 9 (15.52%) CSS
12 9 (15.52%) Finance
12 9 (15.52%) Gradle
12 9 (15.52%) Continuous Integration
12 9 (15.52%) Mobile Development
12 9 (15.52%) SDLC
13 8 (13.79%) Spring Boot
13 8 (13.79%) git-flow
13 8 (13.79%) Computer Science
13 8 (13.79%) HTML5
13 8 (13.79%) Open Source

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 6 (10.34%) WebLogic
1 6 (10.34%) WebSphere
2 2 (3.45%) Cloud Foundry
3 1 (1.72%) Apache Spark
3 1 (1.72%) Confluence
Cloud Services
1 11 (18.97%) GitHub
2 8 (13.79%) AWS
3 4 (6.90%) AWS Lambda
3 4 (6.90%) Serverless
4 3 (5.17%) Azure
5 2 (3.45%) Firebase
6 1 (1.72%) GCP
6 1 (1.72%) Google Play
Communications & Networking
1 6 (10.34%) HTTP
2 2 (3.45%) HTTPS
3 1 (1.72%) SSL
Database & Business Intelligence
1 2 (3.45%) NoSQL
2 1 (1.72%) Oracle Database
2 1 (1.72%) SQLite
Development Applications
1 16 (27.59%) Git (software)
2 11 (18.97%) Jenkins
2 11 (18.97%) JUnit
3 9 (15.52%) Gradle
4 8 (13.79%) git-flow
4 8 (13.79%) Mockito
5 7 (12.07%) Maven
6 6 (10.34%) Ant
6 6 (10.34%) JMeter
7 5 (8.62%) Android Studio
8 2 (3.45%) JIRA
8 2 (3.45%) Xcode
9 1 (1.72%) Cucumber
9 1 (1.72%) GoCD
9 1 (1.72%) Selenium
9 1 (1.72%) Subversion
9 1 (1.72%) TeamCity
9 1 (1.72%) WebDriver
General
1 9 (15.52%) Finance
2 6 (10.34%) Banking
3 5 (8.62%) Games
4 4 (6.90%) Advertising
4 4 (6.90%) Marketing
5 3 (5.17%) Automotive
6 1 (1.72%) Retail Banking
Job Titles
1 47 (81.03%) Developer
2 19 (32.76%) Android Developer
3 12 (20.69%) Java Developer
4 5 (8.62%) Full Stack Developer
5 4 (6.90%) Applications Developer
5 4 (6.90%) Facebook Developer
5 4 (6.90%) Senior Developer
6 3 (5.17%) Engineering Manager
6 3 (5.17%) Java Engineer
6 3 (5.17%) Ruby Developer
6 3 (5.17%) Senior Android Developer
7 2 (3.45%) Android Engineer
7 2 (3.45%) iOS Developer
7 2 (3.45%) Java Software Engineer
7 2 (3.45%) Mobile Developer
7 2 (3.45%) Software Engineer
8 1 (1.72%) Senior Java Developer
8 1 (1.72%) Senior Software Developer
8 1 (1.72%) Server Engineer
8 1 (1.72%) Technical Leader
Libraries, Frameworks & Software Standards
1 22 (37.93%) Spring
2 21 (36.21%) RxJava
3 18 (31.03%) RESTful
4 9 (15.52%) CSS
4 9 (15.52%) HTML
5 8 (13.79%) HTML5
5 8 (13.79%) J2EE
5 8 (13.79%) REST
5 8 (13.79%) Spring Boot
5 8 (13.79%) Web Services
6 6 (10.34%) GraphQL
6 6 (10.34%) JSON
6 6 (10.34%) React
6 6 (10.34%) SOAP
6 6 (10.34%) XML
7 5 (8.62%) Android SDK
7 5 (8.62%) iOS SDK
7 5 (8.62%) Material Design
8 4 (6.90%) Redux
8 4 (6.90%) Ruby on Rails
Miscellaneous
1 12 (20.69%) Greenfield Project
1 12 (20.69%) Mobile App
1 12 (20.69%) User Experience
2 8 (13.79%) Mobile Payment
3 6 (10.34%) Enterprise Software
4 5 (8.62%) Data Structures
5 4 (6.90%) Marketing Technology
6 1 (1.72%) Algorithms
6 1 (1.72%) Analytical Skills
6 1 (1.72%) Self-Motivation
Operating Systems
1 26 (44.83%) Android
2 11 (18.97%) Apple iOS
Processes & Methodologies
1 29 (50.00%) Agile Software Development
2 21 (36.21%) Android Development
3 20 (34.48%) TDD
4 13 (22.41%) Microservices
5 9 (15.52%) Continuous Integration
5 9 (15.52%) Mobile Development
5 9 (15.52%) SDLC
6 8 (13.79%) Computer Science
6 8 (13.79%) Open Source
7 7 (12.07%) API Development
7 7 (12.07%) Fintech
7 7 (12.07%) MVVM
7 7 (12.07%) Pair Programming
7 7 (12.07%) Scrum
7 7 (12.07%) Thought Leadership
7 7 (12.07%) Waterfall
8 6 (10.34%) Multithreaded Programming
8 6 (10.34%) Multithreading
9 5 (8.62%) Software Engineering
9 5 (8.62%) Web Development
Programming Languages
1 40 (68.97%) Java
2 13 (22.41%) JavaScript
3 7 (12.07%) Scala
4 6 (10.34%) Apple Swift
5 5 (8.62%) Python
6 4 (6.90%) Ruby
7 3 (5.17%) C
7 3 (5.17%) Java 8
8 2 (3.45%) Objective-C
9 1 (1.72%) C#
9 1 (1.72%) C++
9 1 (1.72%) Clojure
9 1 (1.72%) SQL
Qualifications
1 7 (12.07%) Degree
2 6 (10.34%) Computer Science Degree
Quality Assurance & Compliance
1 1 (1.72%) QA
System Software
1 3 (5.17%) Docker
Systems Management
1 2 (3.45%) Kubernetes
1 2 (3.45%) Prometheus
2 1 (1.72%) Grafana
2 1 (1.72%) Zipkin
Vendors
1 7 (12.07%) Google
2 5 (8.62%) CA
2 5 (8.62%) CA Agile Central
3 4 (6.90%) Facebook
4 3 (5.17%) Salesforce.com
5 1 (1.72%) Oracle
5 1 (1.72%) Perforce
5 1 (1.72%) TOWER Software