Period
to 12 May 2021

The following table provides summary statistics for contract job vacancies advertised in 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 12 May 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
England > London
6 months to
12 May 2021
Same period 2020 Same period 2019
Rank 137 191 344
Rank change year-on-year +54 +153 +101
Contract jobs citing Kotlin 472 278 285
As % of all contract jobs advertised in London 2.00% 1.32% 0.70%
As % of the Programming Languages category 4.21% 2.75% 1.46%
Number of daily rates quoted 395 197 223
10th Percentile £413 £412 £415
25th Percentile £463 £463 £475
Median daily rate (50th Percentile) £525 £550 £550
Median % change year-on-year -4.55% - +1.85%
75th Percentile £669 £638 £638
90th Percentile £713 £713 £725
England median daily rate £525 £525 £534
% change year-on-year - -1.64% +1.67%
Number of hourly rates quoted 5 9 0
Median hourly rate £64.00 £61.50 -
Median % change year-on-year +4.07% - -
England median hourly rate £64.00 £61.50 £65.00
% change year-on-year +4.07% -5.38% +160.00%

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 London with a requirement for coding skills.

All Programming Languages
London
Contract vacancies with a requirement for coding skills 11,204 10,096 19,479
As % of all contract IT jobs advertised in London 47.54% 47.95% 47.71%
Number of daily rates quoted 8,374 7,551 14,804
10th Percentile £363 £368 £363
25th Percentile £450 £438 £425
Median daily rate (50th Percentile) £525 £525 £525
75th Percentile £638 £625 £613
90th Percentile £713 £700 £675
England median daily rate £500 £500 £485
% change year-on-year - +3.09% +2.11%
Number of hourly rates quoted 68 80 112
10th Percentile £20.35 £18.23 £18.19
25th Percentile £30.18 £26.69 £21.11
Median hourly rate £44.75 £47.83 £36.00
Median % change year-on-year -6.44% +32.86% -6.49%
75th Percentile £63.81 £58.38 £47.83
90th Percentile £68.00 £65.28 £53.75
England median hourly rate £42.50 £43.00 £44.00
% change year-on-year -1.16% -2.27% +10.00%

Kotlin
Job Vacancy Trend in London

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

Job vacancy trend for Kotlin in London

Kotlin
Contractor Daily Rate Trend in London

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

Daily rate trend for Kotlin in London

Kotlin
Daily Rate Histogram in London

Daily rate distribution for jobs citing Kotlin in London over the 6 months to 12 May 2021.

Daily rate histogram for Kotlin in London

Kotlin
Contractor Hourly Rate Trend in London

3-month moving average hourly rates quoted in jobs citing Kotlin in London.

Hourly rate trend for Kotlin in London

Kotlin
Contract Job Locations in London

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Kotlin within the London region over the 6 months to 12 May 2021. The 'Rank Change' column provides an indication of the change in demand within each location based on the same 6 month period last year.

Location Rank Change
on Same Period
Last Year
Matching
Contract
IT Job Ads
Median
Daily Rate
Past 6 Months
Median Daily Rate
% Change
on Same Period
Last Year
Live
Job
Vacancies
Central London +34 64 £588 +6.82% 51
East London +24 8 £480 +2.67% 15
West London +11 3 £800 +45.45% 18
Kotlin
England

For the 6 months to 12 May 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 London region with a requirement for Kotlin.

1 359 (76.06%) Java
2 250 (52.97%) Agile Software Development
3 231 (48.94%) Software Engineering
4 207 (43.86%) Finance
5 181 (38.35%) JavaScript
6 178 (37.71%) AWS
7 171 (36.23%) React
8 164 (34.75%) Android
9 152 (32.20%) Python
10 135 (28.60%) Front Office
11 130 (27.54%) Android Development
12 129 (27.33%) Azure
13 128 (27.12%) Asset Management
14 124 (26.27%) Kubernetes
15 122 (25.85%) Web Services
16 121 (25.64%) Docker
17 110 (23.31%) Node.js
18 108 (22.88%) GCP
19 102 (21.61%) TDD
20 100 (21.19%) Investment Management
21 99 (20.97%) User Experience
22 89 (18.86%) Mobile App
23 84 (17.80%) Terraform
24 83 (17.58%) Spring
25 81 (17.16%) Microservices
26 78 (16.53%) Degree
26 78 (16.53%) Scala
27 75 (15.89%) Release Management
28 70 (14.83%) TypeScript
28 70 (14.83%) Portfolio Management

Kotlin
Co-occurring IT Skills in 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 22 (4.66%) Cloud Foundry
2 19 (4.03%) Apache
3 15 (3.18%) Confluence
4 13 (2.75%) Apache Spark
5 3 (0.64%) Ethereum
6 2 (0.42%) Hyperledger
6 2 (0.42%) Wowza Streaming Engine
7 1 (0.21%) Apache Airflow
7 1 (0.21%) CMS
7 1 (0.21%) SharePoint
7 1 (0.21%) WebLogic
7 1 (0.21%) WebSphere
Business Applications
1 2 (0.42%) Distributed Ledger
1 2 (0.42%) Dynamics NAV
1 2 (0.42%) R3 Corda
Cloud Services
1 178 (37.71%) AWS
2 129 (27.33%) Azure
3 108 (22.88%) GCP
4 31 (6.57%) GitHub
5 30 (6.36%) AWS Lambda
5 30 (6.36%) Serverless
6 27 (5.72%) Amazon EC2
6 27 (5.72%) Amazon S3
7 12 (2.54%) Firebase
8 6 (1.27%) OpenShift
9 5 (1.06%) Slack
10 4 (0.85%) IaaS
11 3 (0.64%) Bitrise
11 3 (0.64%) Flurry Analytics
11 3 (0.64%) PubNub
11 3 (0.64%) SaaS
12 2 (0.42%) Amazon ECS
12 2 (0.42%) Google Play
12 2 (0.42%) Power Platform
13 1 (0.21%) TestFlight
Communications & Networking
1 12 (2.54%) HTTPS
2 6 (1.27%) HTTP
3 4 (0.85%) SSL
4 3 (0.64%) Internet
5 2 (0.42%) RTMP
6 1 (0.21%) 2G
6 1 (0.21%) NFC
6 1 (0.21%) Wi-Fi
Database & Business Intelligence
1 28 (5.93%) Amazon DynamoDB
2 18 (3.81%) Apache Ignite
3 14 (2.97%) NoSQL
4 13 (2.75%) Blockchain
4 13 (2.75%) SQLite
5 8 (1.69%) MongoDB
6 7 (1.48%) Relational Database
7 3 (0.64%) Couchbase
7 3 (0.64%) Hazelcast
7 3 (0.64%) Mixpanel
7 3 (0.64%) Redis
8 2 (0.42%) PostgreSQL
8 2 (0.42%) Power BI
8 2 (0.42%) SQL Server
9 1 (0.21%) Apache Cassandra
9 1 (0.21%) Apache Hive
9 1 (0.21%) Big Data
9 1 (0.21%) Hadoop
9 1 (0.21%) HBase
9 1 (0.21%) RDBMS
Development Applications
1 64 (13.56%) Jenkins
2 62 (13.14%) Git (software)
3 32 (6.78%) JIRA
4 30 (6.36%) JUnit
5 24 (5.08%) Mockito
6 15 (3.18%) Android Studio
7 14 (2.97%) git-flow
7 14 (2.97%) Gradle
8 10 (2.12%) Maven
9 9 (1.91%) TeamCity
10 7 (1.48%) Atlassian Bamboo
10 7 (1.48%) fastlane
10 7 (1.48%) GitLab
11 6 (1.27%) Appium
12 4 (0.85%) Bitbucket
12 4 (0.85%) Calabash
12 4 (0.85%) Cucumber
12 4 (0.85%) Postman
12 4 (0.85%) Xcode
13 3 (0.64%) webpack
General
1 207 (43.86%) Finance
2 135 (28.60%) Front Office
3 61 (12.92%) Social Skills
4 45 (9.53%) Banking
5 14 (2.97%) Analytical Skills
6 11 (2.33%) Games
7 10 (2.12%) Automotive
7 10 (2.12%) Telecoms
8 9 (1.91%) Investment Banking
8 9 (1.91%) Wearables
9 8 (1.69%) Manufacturing
10 6 (1.27%) Retail
11 3 (0.64%) Electronics
11 3 (0.64%) Law
11 3 (0.64%) Marketing
11 3 (0.64%) Public Sector
11 3 (0.64%) Retail Banking
12 2 (0.42%) Multimedia
12 2 (0.42%) Publishing
13 1 (0.21%) Corporate Banking
Job Titles
1 374 (79.24%) Developer
2 116 (24.58%) Android Developer
3 100 (21.19%) React Developer
4 78 (16.53%) Java Developer
5 70 (14.83%) UI Developer
6 69 (14.62%) Designer
6 69 (14.62%) UI Designer
6 69 (14.62%) UI Engineer
6 69 (14.62%) UI/UX Designer
6 69 (14.62%) UI/UX Developer
6 69 (14.62%) UX Designer
6 69 (14.62%) UX Developer
6 69 (14.62%) UX Engineer
7 67 (14.19%) Software Engineer
8 60 (12.71%) Senior Developer
9 42 (8.90%) Developer/Software Engineer
10 38 (8.05%) Python Developer
11 33 (6.99%) Python Engineer
11 33 (6.99%) Python Software Engineer
12 29 (6.14%) Senior Android Developer
Libraries, Frameworks & Software Standards
1 171 (36.23%) React
2 122 (25.85%) Web Services
3 110 (23.31%) Node.js
4 83 (17.58%) Spring
5 69 (14.62%) RxJava
6 57 (12.08%) REST
7 52 (11.02%) AngularJS
7 52 (11.02%) RESTful
8 50 (10.59%) Spring Boot
9 49 (10.38%) Vue.js
10 45 (9.53%) Dagger
11 34 (7.20%) GraphQL
12 29 (6.14%) Android SDK
12 29 (6.14%) Kafka
13 25 (5.30%) HTML
14 22 (4.66%) CSS
15 20 (4.24%) Retrofit
16 19 (4.03%) JSON
17 14 (2.97%) .NET
17 14 (2.97%) Material Design
Miscellaneous
1 99 (20.97%) User Experience
2 89 (18.86%) Mobile App
3 69 (14.62%) Derivative
4 64 (13.56%) Equities
5 58 (12.29%) Fixed Income
6 57 (12.08%) Foreign Exchange (FX)
7 40 (8.47%) Greenfield Project
8 25 (5.30%) Hedge funds
9 19 (4.03%) Credit Risk
10 11 (2.33%) Equity Derivative
11 8 (1.69%) Mobile Payment
12 6 (1.27%) Virtual Team
13 5 (1.06%) Cloud Native
14 4 (0.85%) Algorithms
14 4 (0.85%) Data Structures
14 4 (0.85%) Media Streaming
15 3 (0.64%) Internet of Things
15 3 (0.64%) Linux Command Line
15 3 (0.64%) Video\Live Streaming
16 2 (0.42%) Chromecast
Operating Systems
1 164 (34.75%) Android
2 24 (5.08%) Apple iOS
3 10 (2.12%) Linux
4 4 (0.85%) Unix
4 4 (0.85%) Windows
5 3 (0.64%) Android TV
6 2 (0.42%) Mac OS
Processes & Methodologies
1 250 (52.97%) Agile Software Development
2 231 (48.94%) Software Engineering
3 130 (27.54%) Android Development
4 128 (27.12%) Asset Management
5 102 (21.61%) TDD
6 100 (21.19%) Investment Management
7 81 (17.16%) Microservices
8 75 (15.89%) Release Management
9 70 (14.83%) Portfolio Management
10 69 (14.62%) Release Automation
10 69 (14.62%) Wireframes
11 53 (11.23%) DevOps
11 53 (11.23%) Mobile Development
12 48 (10.17%) MVVM
13 47 (9.96%) Continuous Delivery
13 47 (9.96%) Continuous Integration
14 45 (9.53%) Pair Programming
15 43 (9.11%) Test Automation
16 41 (8.69%) Scrum
17 34 (7.20%) SDLC
Programming Languages
1 359 (76.06%) Java
2 181 (38.35%) JavaScript
3 152 (32.20%) Python
4 78 (16.53%) Scala
5 70 (14.83%) TypeScript
6 48 (10.17%) C#
6 48 (10.17%) SQL
7 46 (9.75%) Java 8
8 45 (9.53%) C++
9 28 (5.93%) Apple Swift
10 20 (4.24%) Objective-C
11 7 (1.48%) Clojure
11 7 (1.48%) Go
12 5 (1.06%) C
12 5 (1.06%) Dart
13 4 (0.85%) Ruby
14 3 (0.64%) Groovy
14 3 (0.64%) PowerShell
15 2 (0.42%) PHP
15 2 (0.42%) Rust
Qualifications
1 78 (16.53%) Degree
2 4 (0.85%) Computer Science Degree
3 1 (0.21%) SANS
3 1 (0.21%) SC Cleared
3 1 (0.21%) Security Cleared
Quality Assurance & Compliance
1 6 (1.27%) QA
2 1 (0.21%) PSD2
2 1 (0.21%) WCAG
System Software
1 121 (25.64%) Docker
2 1 (0.21%) HDFS
Systems Management
1 124 (26.27%) Kubernetes
2 84 (17.80%) Terraform
3 17 (3.60%) Prometheus
4 7 (1.48%) Zipkin
5 6 (1.27%) Ansible
6 5 (1.06%) Istio
7 4 (0.85%) Puppet
8 2 (0.42%) linkerd
9 1 (0.21%) Grafana
9 1 (0.21%) HP Fortify
9 1 (0.21%) Opscode Chef
Vendors
1 16 (3.39%) CA Agile Central
2 14 (2.97%) CA
3 12 (2.54%) Bloomberg
4 11 (2.33%) MuleSoft
5 10 (2.12%) AppDynamics
5 10 (2.12%) Splunk
6 7 (1.48%) Google
6 7 (1.48%) Solace
7 6 (1.27%) Microsoft
8 3 (0.64%) Apple
8 3 (0.64%) SAP
8 3 (0.64%) Xamarin
9 2 (0.42%) Salesforce.com
9 2 (0.42%) SendGrid
9 2 (0.42%) Telerik
10 1 (0.21%) Dell
10 1 (0.21%) HP
10 1 (0.21%) IBM