Period
to 1 June 2020

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 1 June 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
UK
6 months to
1 Jun 2020
Same period 2019 Same period 2018
Rank 268 512 587
Rank change year-on-year +244 +75 +244
Contract jobs citing Kotlin 413 370 307
As % of all contract jobs advertised in the UK 0.90% 0.40% 0.30%
As % of the Programming Languages category 2.20% 0.95% 0.70%
Number of daily rates quoted 299 289 259
Median daily rate £505 £525 £500
Median daily rate % change year-on-year -3.81% +5.00% -20.00%
10th Percentile £399 £361 £363
90th Percentile £700 £700 £650
UK excluding London median daily rate £450 £419 £400
% change year-on-year +7.46% +4.69% -
Number of hourly rates quoted 9 4 1
Median hourly rate £61.50 £63.65 £25.00
Median hourly rate % change year-on-year -3.38% +154.60% -
10th Percentile £50.89 £55.45 £24.50
90th Percentile £64.90 £88.50 £25.50
UK excluding London median hourly rate - £63.65 £25.00
% change year-on-year - +154.60% -

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 18,775 39,121 43,912
As % of all contract IT jobs advertised in the UK 40.90% 42.80% 43.13%
Number of daily rates quoted 12,631 27,074 30,645
Median daily rate £488 £475 £463
Median daily rate % change year-on-year +2.63% +2.70% +7.56%
10th Percentile £325 £325 £313
90th Percentile £669 £650 £638
UK excluding London median daily rate £450 £425 £403
% change year-on-year +5.88% +5.59% +3.87%
Number of hourly rates quoted 414 703 787
Median hourly rate £35.00 £42.50 £40.50
Median hourly rate % change year-on-year -17.65% +4.94% -2.41%
10th Percentile £18.25 £18.00 £17.00
90th Percentile £55.70 £55.00 £52.50
Median hourly rate £35.00 £43.00 £40.00
% change year-on-year -18.60% +7.50% -3.03%

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 1 June 2020.

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 1 June 2020.

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 1 June 2020. 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 +229 367 £525 -0.47% 93
London +160 282 £550 - 57
UK excluding London +213 123 £450 +7.46% 43
North of England +118 39 £474 +11.60% 15
Scotland +71 38 £463 +23.33% 5
South East +138 32 £425 - 6
Work from Home +34 28 £550 +46.67% 14
Yorkshire +85 23 £475 +5.56% 2
North West +52 8 £450 +12.50% 9
North East - 8 £400 - 4
South West +54 6 £493 -19.59% 2
East of England +57 4 £453 +9.70% 8
Midlands +83 2 £375 +17.92% 5
West Midlands - 2 £375 - 2
Wales +30 1 £425 -5.56% 2
Northern Ireland - 1 - -

For the 6 months to 1 June 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 with a requirement for Kotlin.

1 307 (74.33%) Java
2 235 (56.90%) Android
3 210 (50.85%) Agile Software Development
4 192 (46.49%) Android Development
5 97 (23.49%) Software Engineering
6 88 (21.31%) Mobile App
7 83 (20.10%) Banking
8 80 (19.37%) Scala
9 78 (18.89%) Finance
10 76 (18.40%) Microservices
11 75 (18.16%) RESTful
11 75 (18.16%) AWS
12 73 (17.68%) Git (software)
12 73 (17.68%) Spring
13 70 (16.95%) TDD
14 68 (16.46%) JavaScript
14 68 (16.46%) Azure
15 65 (15.74%) RxJava
16 60 (14.53%) Apple iOS
17 58 (14.04%) JUnit
18 56 (13.56%) Continuous Integration
18 56 (13.56%) MVVM
18 56 (13.56%) Docker
19 53 (12.83%) GitHub
20 51 (12.35%) GCP
21 50 (12.11%) React
22 49 (11.86%) Open Source
23 47 (11.38%) Test Automation
23 47 (11.38%) User Experience
23 47 (11.38%) Kafka

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 29 (7.02%) Apache Spark
2 11 (2.66%) Confluence
3 10 (2.42%) WebLogic
3 10 (2.42%) WebSphere
4 7 (1.69%) Cloud Foundry
5 5 (1.21%) OpenStack
6 3 (0.73%) nginx
7 2 (0.48%) Elasticsearch
8 1 (0.24%) Anypoint
Applications
1 3 (0.73%) InVision
1 3 (0.73%) Sketch
2 1 (0.24%) Zeplin
Business Applications
1 7 (1.69%) FINCAD Analytics
2 1 (0.24%) Payment Gateway
2 1 (0.24%) R3 Corda
Cloud Services
1 75 (18.16%) AWS
2 68 (16.46%) Azure
3 53 (12.83%) GitHub
4 51 (12.35%) GCP
5 18 (4.36%) Amazon ECS
5 18 (4.36%) Amazon SQS
6 8 (1.94%) Serverless
7 7 (1.69%) AWS Lambda
7 7 (1.69%) AWS Step Functions
8 6 (1.45%) Slack
9 5 (1.21%) Amazon Kinesis
9 5 (1.21%) Google Play
10 3 (0.73%) Amazon EC2
10 3 (0.73%) Amazon S3
10 3 (0.73%) Firebase
11 2 (0.48%) Amazon ELB
11 2 (0.48%) BrowserStack
11 2 (0.48%) Cloud Computing
11 2 (0.48%) Heroku
11 2 (0.48%) SaaS
Communications & Networking
1 28 (6.78%) HTTPS
2 21 (5.08%) SSL
3 13 (3.15%) HTTP
4 1 (0.24%) Bluetooth
4 1 (0.24%) DNS
4 1 (0.24%) Internet
4 1 (0.24%) NFC
Database & Business Intelligence
1 46 (11.14%) NoSQL
2 20 (4.84%) MongoDB
3 16 (3.87%) PostgreSQL
4 15 (3.63%) Amazon Redshift
5 13 (3.15%) Apache Cassandra
5 13 (3.15%) SQLite
6 12 (2.91%) HBase
7 9 (2.18%) Redis
7 9 (2.18%) Relational Database
8 8 (1.94%) MySQL
9 7 (1.69%) Amazon Athena
9 7 (1.69%) Amazon DynamoDB
9 7 (1.69%) Big Data
9 7 (1.69%) Couchbase
9 7 (1.69%) DB2
9 7 (1.69%) MariaDB
9 7 (1.69%) Neo4j
9 7 (1.69%) RDBMS
10 5 (1.21%) Amazon Aurora
10 5 (1.21%) Flink
Development Applications
1 73 (17.68%) Git (software)
2 58 (14.04%) JUnit
3 47 (11.38%) Jenkins
4 45 (10.90%) Android Studio
5 38 (9.20%) Mockito
6 36 (8.72%) Gradle
7 24 (5.81%) git-flow
8 20 (4.84%) JIRA
9 18 (4.36%) Maven
10 15 (3.63%) Ant
11 12 (2.91%) Cucumber
12 11 (2.66%) JMeter
13 10 (2.42%) Xcode
14 8 (1.94%) Selenium
15 7 (1.69%) CircleCI
15 7 (1.69%) CocoaPods
15 7 (1.69%) Gatling
16 5 (1.21%) fastlane
16 5 (1.21%) GitLab
16 5 (1.21%) Subversion
General
1 83 (20.10%) Banking
2 78 (18.89%) Finance
3 28 (6.78%) Front Office
4 17 (4.12%) Investment Banking
5 10 (2.42%) Games
6 9 (2.18%) Financial Institution
7 7 (1.69%) Public Sector
7 7 (1.69%) Retail
8 6 (1.45%) Automotive
9 4 (0.97%) Telecoms
10 3 (0.73%) Electronics
10 3 (0.73%) Marketing
11 2 (0.48%) Advertising
11 2 (0.48%) Manufacturing
11 2 (0.48%) Police
11 2 (0.48%) Publishing
12 1 (0.24%) Aerospace
12 1 (0.24%) Law
12 1 (0.24%) Local Government
12 1 (0.24%) Mandarin Language
Job Titles
1 318 (77.00%) Developer
2 172 (41.65%) Android Developer
3 74 (17.92%) Java Developer
4 63 (15.25%) Senior Developer
5 32 (7.75%) Senior Android Developer
6 21 (5.08%) React Developer
6 21 (5.08%) Scala Developer
7 20 (4.84%) Full Stack Developer
8 17 (4.12%) iOS Developer
8 17 (4.12%) Mobile Developer
8 17 (4.12%) Senior Scala Developer
9 16 (3.87%) Android Engineer
10 15 (3.63%) Front Office Developer
10 15 (3.63%) Software Engineer
11 14 (3.39%) Java Engineer
12 12 (2.91%) AWS Developer
13 10 (2.42%) JavaScript Developer
13 10 (2.42%) Senior Java Developer
14 9 (2.18%) Applications Developer
14 9 (2.18%) Java Android Developer
Libraries, Frameworks & Software Standards
1 75 (18.16%) RESTful
2 73 (17.68%) Spring
3 65 (15.74%) RxJava
4 50 (12.11%) React
5 47 (11.38%) Kafka
6 46 (11.14%) Dagger
7 39 (9.44%) Node.js
7 39 (9.44%) Retrofit
8 38 (9.20%) Web Services
9 33 (7.99%) HTML
10 32 (7.75%) CSS
11 31 (7.51%) Android SDK
12 29 (7.02%) AngularJS
12 29 (7.02%) J2EE
12 29 (7.02%) JSON
13 28 (6.78%) Material Design
14 27 (6.54%) REST
14 27 (6.54%) Spring Boot
15 25 (6.05%) Redux
16 23 (5.57%) HTML5
Miscellaneous
1 88 (21.31%) Mobile App
2 47 (11.38%) User Experience
3 41 (9.93%) Greenfield Project
4 25 (6.05%) Foreign Exchange (FX)
5 23 (5.57%) Mobile Banking
6 22 (5.33%) Derivative
6 22 (5.33%) Fixed Income
6 22 (5.33%) Hedge funds
7 18 (4.36%) Equities
8 15 (3.63%) Blog
9 14 (3.39%) Analytical Skills
9 14 (3.39%) Mobile Payment
10 12 (2.91%) Enterprise Software
11 11 (2.66%) Virtual Team
12 10 (2.42%) Data Structures
13 8 (1.94%) Self-Motivation
14 7 (1.69%) Equity Derivative
15 5 (1.21%) Market Risk
15 5 (1.21%) Public Cloud
16 3 (0.73%) Video\Live Streaming
Operating Systems
1 235 (56.90%) Android
2 60 (14.53%) Apple iOS
3 13 (3.15%) Linux
4 2 (0.48%) Unix
5 1 (0.24%) Mac OS
5 1 (0.24%) Windows
Processes & Methodologies
1 210 (50.85%) Agile Software Development
2 192 (46.49%) Android Development
3 97 (23.49%) Software Engineering
4 76 (18.40%) Microservices
5 70 (16.95%) TDD
6 56 (13.56%) Continuous Integration
6 56 (13.56%) MVVM
7 49 (11.86%) Open Source
8 47 (11.38%) Test Automation
9 45 (10.90%) DevOps
10 43 (10.41%) SDLC
11 42 (10.17%) Scrum
12 40 (9.69%) Fintech
12 40 (9.69%) Pair Programming
13 36 (8.72%) Mobile Development
14 35 (8.47%) Computer Science
15 34 (8.23%) OO
16 28 (6.78%) Continuous Delivery
17 27 (6.54%) BDD
18 26 (6.30%) Dependency Injection
Programming Languages
1 307 (74.33%) Java
2 80 (19.37%) Scala
3 68 (16.46%) JavaScript
4 46 (11.14%) SQL
5 42 (10.17%) Apple Swift
6 33 (7.99%) Java 8
7 29 (7.02%) Python
8 28 (6.78%) Objective-C
9 14 (3.39%) Bash Shell
9 14 (3.39%) TypeScript
10 11 (2.66%) C#
11 8 (1.94%) Go
12 7 (1.69%) C
13 5 (1.21%) Perl
13 5 (1.21%) Ruby
14 4 (0.97%) C++
14 4 (0.97%) Clojure
14 4 (0.97%) Haskell
15 2 (0.48%) ES6
15 2 (0.48%) Shell Script
Qualifications
1 19 (4.60%) Degree
2 12 (2.91%) Computer Science Degree
3 3 (0.73%) BPSS Clearance
4 2 (0.48%) ISTQB
4 2 (0.48%) ISTQB Foundation Certification
4 2 (0.48%) Security Cleared
5 1 (0.24%) ISTQB Advanced Certification
5 1 (0.24%) Master's Degree
5 1 (0.24%) MCSE
5 1 (0.24%) Microsoft Certification
5 1 (0.24%) SANS
5 1 (0.24%) SC Cleared
Quality Assurance & Compliance
1 6 (1.45%) QA
2 2 (0.48%) WCAG
System Software
1 56 (13.56%) Docker
2 5 (1.21%) HDFS
3 1 (0.24%) Active Directory
3 1 (0.24%) Firmware
Systems Management
1 46 (11.14%) Kubernetes
2 28 (6.78%) Prometheus
3 23 (5.57%) Terraform
4 20 (4.84%) Zipkin
5 5 (1.21%) Ansible
5 5 (1.21%) Grafana
5 5 (1.21%) Hadoop YARN
6 1 (0.24%) Graphite
6 1 (0.24%) HockeyApp
6 1 (0.24%) Nessus
6 1 (0.24%) Opscode Chef
6 1 (0.24%) Puppet
Vendors
1 18 (4.36%) Google
2 11 (2.66%) Oracle
3 8 (1.94%) CA
3 8 (1.94%) CA Agile Central
4 7 (1.69%) Sybase
5 5 (1.21%) AppDynamics
5 5 (1.21%) Splunk
5 5 (1.21%) Tableau
6 3 (0.73%) Apple
6 3 (0.73%) Facebook
6 3 (0.73%) Perforce
6 3 (0.73%) Salesforce.com
7 2 (0.48%) Microsoft
7 2 (0.48%) Xamarin
8 1 (0.24%) Capita
8 1 (0.24%) MuleSoft
8 1 (0.24%) SaltStack
8 1 (0.24%) SAP
8 1 (0.24%) TOWER Software
8 1 (0.24%) VMware