Period
to 19 June 2021

The following table provides summary statistics for contract job vacancies 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 June 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
UK
6 months to
19 Jun 2021
Same period 2020 Same period 2019
Rank 248 278 509
Rank change year-on-year +30 +231 +94
Contract jobs citing Kotlin 679 390 386
As % of all contract jobs advertised in the UK 1.09% 0.92% 0.43%
As % of the Programming Languages category 2.68% 2.23% 1.00%
Number of daily rates quoted 545 279 291
10th Percentile £406 £400 £363
25th Percentile £450 £425 £425
Median daily rate (50th Percentile) £525 £513 £525
Median % change year-on-year +2.44% -2.38% +2.94%
75th Percentile £631 £625 £625
90th Percentile £700 £700 £700
UK excluding London median daily rate £463 £450 £425
% change year-on-year +2.78% +5.88% +6.25%
Number of hourly rates quoted 11 7 2
10th Percentile £45.00 £56.55 £64.52
25th Percentile £62.00 £59.25 £69.18
Median hourly rate £64.00 £61.50 £78.65
Median % change year-on-year +4.07% -21.81% +214.60%
75th Percentile £65.00 £63.75 £88.92
90th Percentile £68.36 £66.05 £94.07
UK excluding London median hourly rate £64.00 - £62.30

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 with a requirement for coding skills.

All Programming Languages
UK
Contract vacancies with a requirement for coding skills 25,308 17,512 38,675
As % of all contract IT jobs advertised in the UK 40.49% 41.18% 42.63%
Number of daily rates quoted 17,796 12,371 27,100
10th Percentile £335 £325 £325
25th Percentile £413 £404 £400
Median daily rate (50th Percentile) £500 £495 £475
Median % change year-on-year +1.01% +4.21% +3.26%
75th Percentile £600 £588 £575
90th Percentile £688 £675 £650
UK excluding London median daily rate £440 £450 £425
% change year-on-year -2.22% +5.88% +4.29%
Number of hourly rates quoted 472 296 652
10th Percentile £16.43 £17.79 £18.00
25th Percentile £25.00 £22.00 £32.50
Median hourly rate £42.50 £42.50 £43.75
Median % change year-on-year - -2.86% +8.02%
75th Percentile £53.38 £50.00 £50.00
90th Percentile £64.00 £59.00 £55.00
UK excluding London median hourly rate £41.00 £42.50 £44.00
% change year-on-year -3.53% -3.41% +10.00%

Kotlin
Job Vacancy Trend

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

Job vacancy trend for Kotlin in the UK

Kotlin
Contractor Daily Rate Trend

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

Daily rate trend for Kotlin in the UK

Kotlin
Daily Rate Histogram

Daily rate distribution for jobs citing Kotlin over the 6 months to 19 June 2021.

Daily rate histogram for Kotlin in the UK

Kotlin
Contractor Hourly Rate Trend

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

Hourly rate trend for Kotlin in the UK

Kotlin
Hourly Rate Histogram

Hourly rate distribution of jobs citing Kotlin over the 6 months to 19 June 2021.

Hourly rate histogram for Kotlin in the UK

Kotlin
Top 16 Contract Locations

The table below looks at the demand and provides a guide to the median contractor rates quoted in IT jobs citing Kotlin within the UK over the 6 months to 19 June 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
England +62 605 £525 - 257
London +26 487 £525 -4.55% 167
Work from Home -81 246 £525 -4.55% 76
UK excluding London -26 85 £463 +2.78% 102
North of England +13 38 £455 +5.81% 38
Yorkshire +16 23 £455 +0.55% 6
South West +31 16 £470 -4.57% 12
North West +3 14 £463 +20.92% 29
South East -23 12 £488 +14.71% 22
Wales +8 7 £463 +8.82% 8
Scotland -71 5 £425 -10.53% 4
East of England +4 4 £463 -2.63% 8
Midlands -14 4 £406 +8.33% 9
West Midlands -15 3 £363 -3.33% 7
North East +8 1 £425 +6.25% 3
East Midlands - 1 £450 - 2

For the 6 months to 19 June 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 with a requirement for Kotlin.

1 506 (74.52%) Java
2 348 (51.25%) Agile Software Development
3 293 (43.15%) Android
4 251 (36.97%) Software Engineering
5 240 (35.35%) Android Development
6 215 (31.66%) Finance
7 211 (31.08%) JavaScript
8 192 (28.28%) AWS
9 184 (27.10%) React
10 169 (24.89%) Python
11 165 (24.30%) Azure
12 161 (23.71%) TDD
13 155 (22.83%) Mobile App
14 135 (19.88%) Kubernetes
14 135 (19.88%) Docker
15 130 (19.15%) GCP
16 128 (18.85%) Microservices
17 122 (17.97%) Social Skills
18 121 (17.82%) Node.js
19 120 (17.67%) Front Office
20 119 (17.53%) Spring
21 117 (17.23%) TypeScript
22 114 (16.79%) Git (software)
23 113 (16.64%) User Experience
24 111 (16.35%) Asset Management
25 109 (16.05%) Web Services
25 109 (16.05%) REST
26 102 (15.02%) Jenkins
26 102 (15.02%) Test Automation
27 89 (13.11%) RxJava

Kotlin
Co-occurring IT Skills 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 33 (4.86%) Confluence
2 24 (3.53%) Cloud Foundry
3 6 (0.88%) Apache
4 5 (0.74%) Elasticsearch
5 4 (0.59%) Apache Airflow
5 4 (0.59%) Apache Spark
6 3 (0.44%) Ethereum
6 3 (0.44%) IBM Domino
7 2 (0.29%) Hyperledger
7 2 (0.29%) Wowza Streaming Engine
8 1 (0.15%) Adobe Experience Manager
8 1 (0.15%) Apache Pig
8 1 (0.15%) CMS
8 1 (0.15%) SharePoint
8 1 (0.15%) Tomcat
Applications
1 1 (0.15%) Photoshop
Business Applications
1 4 (0.59%) Distributed Ledger
2 3 (0.44%) Payment Gateway
3 2 (0.29%) R3 Corda
4 1 (0.15%) Magento
4 1 (0.15%) Oracle Cash Management
4 1 (0.15%) SAP Hybris
Cloud Services
1 192 (28.28%) AWS
2 165 (24.30%) Azure
3 130 (19.15%) GCP
4 48 (7.07%) GitHub
5 44 (6.48%) Serverless
6 35 (5.15%) AWS Lambda
7 30 (4.42%) Amazon S3
8 29 (4.27%) Amazon EC2
9 16 (2.36%) Firebase
10 15 (2.21%) Slack
11 11 (1.62%) OpenShift
12 8 (1.18%) PaaS
13 7 (1.03%) Bitrise
14 5 (0.74%) SaaS
15 4 (0.59%) Flurry Analytics
15 4 (0.59%) Google Compute Engine
15 4 (0.59%) IaaS
15 4 (0.59%) PubNub
16 3 (0.44%) Google Play
17 2 (0.29%) TestFlight
Communications & Networking
1 16 (2.36%) HTTPS
2 8 (1.18%) HTTP
2 8 (1.18%) Internet
3 6 (0.88%) SSL
4 5 (0.74%) 2G
5 4 (0.59%) Network Security
6 3 (0.44%) Wi-Fi
7 2 (0.29%) Bluetooth
7 2 (0.29%) DNS
7 2 (0.29%) NFC
7 2 (0.29%) RTMP
7 2 (0.29%) TCP/IP
8 1 (0.15%) Broadband
Database & Business Intelligence
1 28 (4.12%) Amazon DynamoDB
2 22 (3.24%) Blockchain
3 11 (1.62%) MongoDB
3 11 (1.62%) NoSQL
3 11 (1.62%) Relational Database
3 11 (1.62%) SQLite
4 9 (1.33%) PostgreSQL
5 6 (0.88%) Apache Ignite
6 5 (0.74%) MySQL
7 4 (0.59%) Amazon Athena
7 4 (0.59%) Big Data
7 4 (0.59%) BigQuery
7 4 (0.59%) Mixpanel
8 3 (0.44%) Hadoop
8 3 (0.44%) RDBMS
9 2 (0.29%) Apache Cassandra
9 2 (0.29%) Apache Hive
9 2 (0.29%) Data Warehouse
9 2 (0.29%) Power BI
9 2 (0.29%) SQL Server
Development Applications
1 114 (16.79%) Git (software)
2 102 (15.02%) Jenkins
3 56 (8.25%) JIRA
4 52 (7.66%) JUnit
5 41 (6.04%) Android Studio
6 35 (5.15%) Mockito
7 31 (4.57%) Gradle
8 30 (4.42%) Maven
9 19 (2.80%) git-flow
10 15 (2.21%) GitLab
11 12 (1.77%) Atlassian Bamboo
11 12 (1.77%) Calabash
12 11 (1.62%) Postman
12 11 (1.62%) Sonatype Nexus
13 10 (1.47%) Cucumber
13 10 (1.47%) TeamCity
14 8 (1.18%) Appium
15 7 (1.03%) fastlane
15 7 (1.03%) RSpec
16 6 (0.88%) Crashlytics
General
1 215 (31.66%) Finance
2 122 (17.97%) Social Skills
3 120 (17.67%) Front Office
4 60 (8.84%) Banking
5 24 (3.53%) Analytical Skills
6 23 (3.39%) Manufacturing
7 21 (3.09%) Telecoms
8 15 (2.21%) Games
9 14 (2.06%) Automotive
9 14 (2.06%) Public Sector
10 13 (1.91%) Retail
11 11 (1.62%) Investment Banking
12 10 (1.47%) Marketing
12 10 (1.47%) Retail Banking
13 8 (1.18%) Electronics
13 8 (1.18%) Wearables
14 5 (0.74%) Presentation Skills
14 5 (0.74%) Publishing
15 4 (0.59%) Law
16 2 (0.29%) Multimedia
Job Titles
1 565 (83.21%) Developer
2 221 (32.55%) Android Developer
3 121 (17.82%) Java Developer
4 115 (16.94%) React Developer
5 72 (10.60%) Senior Developer
6 64 (9.43%) Software Engineer
7 61 (8.98%) Designer
8 60 (8.84%) UI Developer
9 59 (8.69%) UI Designer
9 59 (8.69%) UI Engineer
9 59 (8.69%) UI/UX Designer
9 59 (8.69%) UI/UX Developer
9 59 (8.69%) UX Designer
9 59 (8.69%) UX Developer
9 59 (8.69%) UX Engineer
10 39 (5.74%) Python Developer
11 36 (5.30%) Developer/Software Engineer
12 35 (5.15%) JavaScript Developer
12 35 (5.15%) Senior Android Developer
13 31 (4.57%) Lead Developer
Libraries, Frameworks & Software Standards
1 184 (27.10%) React
2 121 (17.82%) Node.js
3 119 (17.53%) Spring
4 109 (16.05%) REST
4 109 (16.05%) Web Services
5 89 (13.11%) RxJava
6 83 (12.22%) RESTful
7 76 (11.19%) Spring Boot
8 64 (9.43%) Dagger
9 62 (9.13%) AngularJS
9 62 (9.13%) GraphQL
10 57 (8.39%) Vue.js
11 46 (6.77%) Android SDK
12 43 (6.33%) JSON
12 43 (6.33%) React Native
13 42 (6.19%) HTML
14 37 (5.45%) CSS
15 32 (4.71%) Kafka
16 27 (3.98%) Retrofit
17 23 (3.39%) XML
Miscellaneous
1 155 (22.83%) Mobile App
2 113 (16.64%) User Experience
3 68 (10.01%) Foreign Exchange (FX)
4 65 (9.57%) Derivative
5 63 (9.28%) Equities
6 61 (8.98%) Greenfield Project
7 52 (7.66%) Fixed Income
8 26 (3.83%) Hedge funds
9 24 (3.53%) Credit Risk
10 14 (2.06%) Data Protection Act
11 12 (1.77%) Cloud Native
11 12 (1.77%) Equity Derivative
12 9 (1.33%) Chromecast
13 8 (1.18%) Virtual Team
14 7 (1.03%) Mobile Payment
14 7 (1.03%) Self-Motivation
15 6 (0.88%) Data Structures
15 6 (0.88%) Mobile Banking
15 6 (0.88%) STB
15 6 (0.88%) Video\Live Streaming
Operating Systems
1 293 (43.15%) Android
2 55 (8.10%) Apple iOS
3 18 (2.65%) Linux
4 9 (1.33%) Android TV
5 4 (0.59%) Unix
5 4 (0.59%) Windows
6 2 (0.29%) Mac OS
7 1 (0.15%) Alpine Linux
7 1 (0.15%) CentOS
7 1 (0.15%) Embedded Linux
Processes & Methodologies
1 348 (51.25%) Agile Software Development
2 251 (36.97%) Software Engineering
3 240 (35.35%) Android Development
4 161 (23.71%) TDD
5 128 (18.85%) Microservices
6 111 (16.35%) Asset Management
7 102 (15.02%) Test Automation
8 89 (13.11%) DevOps
9 83 (12.22%) Investment Management
10 76 (11.19%) MVVM
11 71 (10.46%) Continuous Integration
12 68 (10.01%) Pair Programming
13 66 (9.72%) Mobile Development
14 64 (9.43%) Release Management
15 61 (8.98%) Continuous Delivery
16 60 (8.84%) Scrum
17 59 (8.69%) Portfolio Management
17 59 (8.69%) Release Automation
17 59 (8.69%) SDLC
17 59 (8.69%) Wireframes
Programming Languages
1 506 (74.52%) Java
2 211 (31.08%) JavaScript
3 169 (24.89%) Python
4 117 (17.23%) TypeScript
5 88 (12.96%) Scala
6 60 (8.84%) Apple Swift
6 60 (8.84%) Java 8
7 54 (7.95%) C#
8 51 (7.51%) C++
9 50 (7.36%) SQL
10 42 (6.19%) Objective-C
11 26 (3.83%) Go
12 12 (1.77%) C
13 10 (1.47%) Ruby
14 9 (1.33%) Groovy
15 8 (1.18%) Dart
16 5 (0.74%) Bash Shell
17 3 (0.44%) Clojure
17 3 (0.44%) ES6
17 3 (0.44%) PowerShell
Qualifications
1 75 (11.05%) Degree
2 7 (1.03%) Computer Science Degree
3 6 (0.88%) SC Cleared
3 6 (0.88%) Security Cleared
4 2 (0.29%) AWS Certification
4 2 (0.29%) BPSS Clearance
5 1 (0.15%) ISTQB
5 1 (0.15%) ISTQB Foundation Certification
5 1 (0.15%) SANS
Quality Assurance & Compliance
1 13 (1.91%) QA
2 10 (1.47%) Accessibility
3 4 (0.59%) WCAG
4 2 (0.29%) GDPR
4 2 (0.29%) HIPAA
4 2 (0.29%) PSD2
5 1 (0.15%) ISO 20022
5 1 (0.15%) TARGET2
System Software
1 135 (19.88%) Docker
2 2 (0.29%) KVM
3 1 (0.15%) Apache ZooKeeper
3 1 (0.15%) HDFS
Systems Management
1 135 (19.88%) Kubernetes
2 75 (11.05%) Terraform
3 17 (2.50%) Prometheus
4 12 (1.77%) Ansible
4 12 (1.77%) Istio
5 7 (1.03%) Puppet
5 7 (1.03%) Zipkin
6 6 (0.88%) Opscode Chef
7 4 (0.59%) Bugsnag
8 2 (0.29%) linkerd
9 1 (0.15%) Grafana
9 1 (0.15%) HP Fortify
9 1 (0.15%) Icinga
9 1 (0.15%) Kustomize
9 1 (0.15%) Oozie
Vendors
1 24 (3.53%) Google
2 23 (3.39%) CA Agile Central
3 21 (3.09%) CA
4 19 (2.80%) Splunk
5 18 (2.65%) AppDynamics
6 11 (1.62%) Xamarin
7 10 (1.47%) SAP
8 8 (1.18%) MuleSoft
9 7 (1.03%) Solace
10 5 (0.74%) Microsoft
10 5 (0.74%) Oracle
11 4 (0.59%) Salesforce.com
12 3 (0.44%) Adobe
12 3 (0.44%) Apple
12 3 (0.44%) Atlassian
12 3 (0.44%) hybris
12 3 (0.44%) Xerox
13 2 (0.29%) SaltStack
14 1 (0.15%) Roku
14 1 (0.15%) Samsung