Period
to 11 December 2019

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 11 December 2019 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
11 Dec 2019
Same period 2018 Same period 2017
Rank 159 169 235
Rank change year-on-year +10 +66 -
Contract jobs citing Kotlin 56 90 24
As % of all contract IT jobs advertised in the City of London 1.00% 1.26% 0.33%
As % of the Programming Languages category 2.02% 2.32% 0.63%
Number of daily rates quoted 51 87 15
City of London median daily rate £550 £580 £565
Median daily rate % change year-on-year -5.17% +2.65% -
10th Percentile £375 £425 £450
90th Percentile £688 £775 £688
Central London median daily rate £550 £550 £545
% change year-on-year - +0.92% -
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central London median hourly rate - - -

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 2,767 3,873 3,781
As % of all contract IT jobs advertised in the City of London 49.41% 54.26% 52.61%
Number of daily rates quoted 2,221 3,217 3,162
City of London median daily rate £525 £525 £525
10th Percentile £388 £381 £363
90th Percentile £688 £675 £688
Central London median daily rate £525 £525 £513
% change year-on-year - +2.44% +7.89%
Number of hourly rates quoted 10 8 11
City of London median hourly rate £37.75 £37.09 £24.49
Median hourly rate % change year-on-year +1.78% +51.48% -10.96%
10th Percentile £21.15 £16.10 £13.35
90th Percentile £56.45 £74.46 £30.00
Central London median hourly rate £31.50 £37.09 £25.79
% change year-on-year -15.07% +43.83% -6.23%

Kotlin
Job Vacancy Trend in the City of London

Job postings citing Kotlin as a percentage 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

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Kotlin in the City of London.

Contractor daily rate trend for Kotlin in the City of London

Kotlin
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Kotlin in the City of London over the 6 months to 11 December 2019.

Contractor daily rate histogram for Kotlin in the City of London

For the 6 months to 11 December 2019, 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 44 (78.57%) Java
2 28 (50.00%) Agile Software Development
3 25 (44.64%) Android
4 23 (41.07%) Android Development
5 18 (32.14%) Microservices
6 17 (30.36%) TDD
7 13 (23.21%) RxJava
8 12 (21.43%) Spring
8 12 (21.43%) Degree
8 12 (21.43%) JavaScript
8 12 (21.43%) Computer Science
9 11 (19.64%) Git (software)
9 11 (19.64%) Scala
10 10 (17.86%) Clojure
10 10 (17.86%) RESTful
10 10 (17.86%) User Experience
11 9 (16.07%) Mobile App
11 9 (16.07%) Python
11 9 (16.07%) Google
11 9 (16.07%) Banking
12 8 (14.29%) Pair Programming
12 8 (14.29%) Software Engineering
12 8 (14.29%) JSON
12 8 (14.29%) Web Services
12 8 (14.29%) JUnit
12 8 (14.29%) Jenkins
12 8 (14.29%) GitHub
12 8 (14.29%) Kubernetes
13 7 (12.50%) Open Source
13 7 (12.50%) Mathematics

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 4 (7.14%) WebLogic
1 4 (7.14%) WebSphere
2 2 (3.57%) Apache Spark
2 2 (3.57%) Confluence
3 1 (1.79%) Elasticsearch
Cloud Services
1 8 (14.29%) GitHub
2 6 (10.71%) AWS
3 4 (7.14%) AWS Lambda
3 4 (7.14%) Serverless
4 2 (3.57%) Firebase
4 2 (3.57%) Google Play
5 1 (1.79%) Amazon Kinesis
5 1 (1.79%) Datadog
5 1 (1.79%) Fastly
5 1 (1.79%) Heroku
5 1 (1.79%) OpenShift
Communications & Networking
1 4 (7.14%) HTTP
2 1 (1.79%) HTTPS
Database & Business Intelligence
1 2 (3.57%) Apache Hive
1 2 (3.57%) Big Data
1 2 (3.57%) Hadoop
1 2 (3.57%) Oracle Database
1 2 (3.57%) PostgreSQL
1 2 (3.57%) Redis
2 1 (1.79%) Amazon DynamoDB
2 1 (1.79%) Apache Cassandra
2 1 (1.79%) FoundationDB
2 1 (1.79%) InfluxDB
2 1 (1.79%) MongoDB
2 1 (1.79%) Neo4j
2 1 (1.79%) NoSQL
Development Applications
1 11 (19.64%) Git (software)
2 8 (14.29%) Jenkins
2 8 (14.29%) JUnit
3 6 (10.71%) Gradle
3 6 (10.71%) Maven
3 6 (10.71%) Mockito
4 4 (7.14%) Ant
4 4 (7.14%) git-flow
4 4 (7.14%) JMeter
5 2 (3.57%) Cucumber
5 2 (3.57%) GoCD
5 2 (3.57%) JIRA
5 2 (3.57%) TeamCity
6 1 (1.79%) CircleCI
6 1 (1.79%) webpack
General
1 9 (16.07%) Banking
2 7 (12.50%) Finance
3 3 (5.36%) Advertising
3 3 (5.36%) Marketing
3 3 (5.36%) Retail
4 2 (3.57%) Retail Banking
5 1 (1.79%) Front Office
5 1 (1.79%) Law
Job Titles
1 42 (75.00%) Developer
2 20 (35.71%) Android Developer
3 12 (21.43%) Java Developer
4 9 (16.07%) Senior Developer
5 5 (8.93%) Senior Android Developer
6 4 (7.14%) Senior Java Developer
7 3 (5.36%) Android Engineer
7 3 (5.36%) Facebook Developer
7 3 (5.36%) Java Engineer
8 2 (3.57%) Applications Engineer
8 2 (3.57%) Data Engineer
8 2 (3.57%) iOS Android Developer
8 2 (3.57%) iOS Developer
8 2 (3.57%) Ruby Developer
8 2 (3.57%) Software Developer
9 1 (1.79%) Business Intelligence Developer
9 1 (1.79%) Programmer
9 1 (1.79%) Senior Software Engineer
9 1 (1.79%) Server Engineer
9 1 (1.79%) Software Engineer
Libraries, Frameworks & Software Standards
1 13 (23.21%) RxJava
2 12 (21.43%) Spring
3 10 (17.86%) RESTful
4 8 (14.29%) JSON
4 8 (14.29%) Web Services
5 6 (10.71%) CSS
5 6 (10.71%) Dagger
5 6 (10.71%) HTML
5 6 (10.71%) XML
6 5 (8.93%) Node.js
6 5 (8.93%) Spring Boot
7 4 (7.14%) GraphQL
7 4 (7.14%) HTML5
7 4 (7.14%) J2EE
7 4 (7.14%) Kafka
7 4 (7.14%) Retrofit
7 4 (7.14%) SOAP
8 3 (5.36%) Material Design
8 3 (5.36%) Redux
8 3 (5.36%) Ruby on Rails
Miscellaneous
1 10 (17.86%) User Experience
2 9 (16.07%) Mobile App
3 4 (7.14%) Enterprise Software
3 4 (7.14%) Greenfield Project
3 4 (7.14%) Mobile Payment
4 3 (5.36%) Data Structures
4 3 (5.36%) Equities
4 3 (5.36%) Marketing Technology
5 2 (3.57%) Analytical Skills
6 1 (1.79%) Self-Motivation
6 1 (1.79%) Video on Demand
Operating Systems
1 25 (44.64%) Android
2 6 (10.71%) Apple iOS
3 1 (1.79%) Linux
Processes & Methodologies
1 28 (50.00%) Agile Software Development
2 23 (41.07%) Android Development
3 18 (32.14%) Microservices
4 17 (30.36%) TDD
5 12 (21.43%) Computer Science
6 8 (14.29%) Pair Programming
6 8 (14.29%) Software Engineering
7 7 (12.50%) Mathematics
7 7 (12.50%) Open Source
8 6 (10.71%) Continuous Integration
9 5 (8.93%) API Development
9 5 (8.93%) DevOps
10 4 (7.14%) Coaching
10 4 (7.14%) Mobile Development
10 4 (7.14%) Multithreaded Programming
10 4 (7.14%) Multithreading
10 4 (7.14%) SDLC
10 4 (7.14%) Test Automation
10 4 (7.14%) Unit Testing
10 4 (7.14%) Waterfall
Programming Languages
1 44 (78.57%) Java
2 12 (21.43%) JavaScript
3 11 (19.64%) Scala
4 10 (17.86%) Clojure
5 9 (16.07%) Python
6 4 (7.14%) Apple Swift
6 4 (7.14%) ClojureScript
6 4 (7.14%) SQL
7 3 (5.36%) Ruby
8 2 (3.57%) Bash Shell
8 2 (3.57%) C#
8 2 (3.57%) Go
8 2 (3.57%) Java 8
8 2 (3.57%) TypeScript
9 1 (1.79%) Haskell
Qualifications
1 12 (21.43%) Degree
2 3 (5.36%) Computer Science Degree
3 2 (3.57%) Master's Degree
System Software
1 5 (8.93%) Docker
Systems Management
1 8 (14.29%) Kubernetes
2 4 (7.14%) Grafana
3 3 (5.36%) Prometheus
4 1 (1.79%) Ansible
4 1 (1.79%) Consul
4 1 (1.79%) Graphite
4 1 (1.79%) Kibana
4 1 (1.79%) Marathon
4 1 (1.79%) Mesos
4 1 (1.79%) Terraform
Vendors
1 9 (16.07%) Google
2 3 (5.36%) Facebook
3 2 (3.57%) Bloomberg
3 2 (3.57%) Oracle
3 2 (3.57%) Perforce
3 2 (3.57%) Reuters
4 1 (1.79%) CA
4 1 (1.79%) CA Agile Central
4 1 (1.79%) Splunk