Period
to 8 August 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 8 August 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
8 Aug 2020
Same period 2019 Same period 2018
Rank 252 475 612
Rank change year-on-year +223 +137 +215
Contract jobs citing Kotlin 352 403 305
As % of all contract jobs advertised in the UK 1.00% 0.44% 0.30%
As % of the Programming Languages category 2.42% 1.04% 0.67%
Number of daily rates quoted 252 319 262
Median daily rate £525 £513 £510
Median daily rate % change year-on-year +2.34% +0.59% +2.00%
10th Percentile £394 £357 £375
90th Percentile £687 £700 £650
UK excluding London median daily rate £450 £425 £400
% change year-on-year +5.88% +6.25% +6.67%
Number of hourly rates quoted 5 2 0
Median hourly rate £61.50 £75.20 -
Median hourly rate % change year-on-year -18.22% - -
UK excluding 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 with a requirement for coding skills.

All Programming Languages
UK
Contract vacancies with a requirement for coding skills 14,518 38,644 45,283
As % of all contract IT jobs advertised in the UK 41.22% 42.39% 44.12%
Number of daily rates quoted 9,612 26,750 31,750
Median daily rate £495 £475 £463
Median daily rate % change year-on-year +4.21% +2.70% +2.78%
10th Percentile £320 £322 £313
90th Percentile £681 £650 £638
UK excluding London median daily rate £450 £425 £413
% change year-on-year +5.88% +3.03% +3.13%
Number of hourly rates quoted 366 700 748
Median hourly rate £35.25 £44.00 £40.50
Median hourly rate % change year-on-year -19.89% +8.64% +1.25%
10th Percentile £17.63 £20.50 £16.25
90th Percentile £56.25 £55.00 £52.50
Median hourly rate £37.55 £44.00 £40.63
% change year-on-year -14.67% +8.31% -1.28%

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 8 August 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
Top 13 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 8 August 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 +220 320 £525 - 149
London +161 282 £550 - 88
UK excluding London +205 58 £450 +5.88% 67
Work from Home -5 28 £488 +18.18% 32
Scotland +79 22 £475 +15.15% 4
South East +149 19 £425 -5.56% 11
North of England +116 13 £400 -6.98% 33
North West +83 9 £400 - 13
Yorkshire +66 4 - - 11
South West +85 2 £521 +9.74% 3
Midlands +85 1 £375 +17.92% 10
West Midlands +66 1 £375 +7.14% 7
Northern Ireland - 1 - -

For the 6 months to 8 August 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.

1 257 (73.01%) Java
2 185 (52.56%) Agile Software Development
3 182 (51.70%) Android
4 156 (44.32%) Android Development
5 92 (26.14%) Software Engineering
6 90 (25.57%) Finance
7 89 (25.28%) AWS
8 79 (22.44%) Scala
9 76 (21.59%) RxJava
10 72 (20.45%) Mobile App
11 71 (20.17%) Banking
11 71 (20.17%) Microservices
12 67 (19.03%) Git (software)
13 64 (18.18%) Python
14 63 (17.90%) JavaScript
15 61 (17.33%) Spring
16 54 (15.34%) JUnit
16 54 (15.34%) DevOps
17 52 (14.77%) SQL
17 52 (14.77%) MVVM
18 51 (14.49%) RESTful
19 50 (14.20%) GitHub
20 49 (13.92%) Fintech
21 47 (13.35%) React
22 46 (13.07%) TDD
23 45 (12.78%) Continuous Integration
24 44 (12.50%) Jenkins
24 44 (12.50%) SDLC
25 43 (12.22%) Azure
26 42 (11.93%) Retrofit

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 27 (7.67%) Apache Spark
2 23 (6.53%) Cloud Foundry
3 11 (3.13%) Confluence
4 4 (1.14%) Anypoint
5 2 (0.57%) WebLogic
5 2 (0.57%) WebSphere
6 1 (0.28%) Elasticsearch
Applications
1 3 (0.85%) InVision
1 3 (0.85%) Sketch
Cloud Services
1 89 (25.28%) AWS
2 50 (14.20%) GitHub
3 43 (12.22%) Azure
4 34 (9.66%) GCP
5 25 (7.10%) Serverless
6 23 (6.53%) Amazon S3
7 21 (5.97%) AWS Lambda
8 20 (5.68%) Amazon EC2
9 10 (2.84%) Firebase
10 7 (1.99%) Cloud Computing
11 3 (0.85%) Amazon CloudWatch
11 3 (0.85%) Google Play
11 3 (0.85%) npm
12 2 (0.57%) SaaS
13 1 (0.28%) Amazon ECS
13 1 (0.28%) Amazon SQS
13 1 (0.28%) AWS CloudFormation
13 1 (0.28%) Google Analytics
13 1 (0.28%) Heroku
13 1 (0.28%) Slack
Communications & Networking
1 31 (8.81%) HTTPS
2 21 (5.97%) SSL
3 2 (0.57%) HTTP
4 1 (0.28%) Bluetooth
4 1 (0.28%) Internet
Database & Business Intelligence
1 36 (10.23%) NoSQL
2 20 (5.68%) Amazon DynamoDB
3 10 (2.84%) MongoDB
4 7 (1.99%) SQLite
5 6 (1.70%) PostgreSQL
6 5 (1.42%) MySQL
6 5 (1.42%) Relational Database
7 4 (1.14%) Big Data
8 3 (0.85%) SQL Server
9 2 (0.57%) Redis
10 1 (0.28%) Apache Cassandra
10 1 (0.28%) Blockchain
10 1 (0.28%) Hadoop
10 1 (0.28%) Hazelcast
10 1 (0.28%) Mixpanel
10 1 (0.28%) RDBMS
Development Applications
1 67 (19.03%) Git (software)
2 54 (15.34%) JUnit
3 44 (12.50%) Jenkins
4 40 (11.36%) Mockito
5 32 (9.09%) JIRA
6 28 (7.95%) Android Studio
7 20 (5.68%) Gradle
8 14 (3.98%) git-flow
9 11 (3.13%) CircleCI
10 10 (2.84%) Xcode
11 9 (2.56%) Selenium
12 8 (2.27%) Vagrant
13 7 (1.99%) Ant
14 5 (1.42%) Cucumber
15 4 (1.14%) CocoaPods
15 4 (1.14%) GitLab
15 4 (1.14%) Maven
15 4 (1.14%) Subversion
16 3 (0.85%) Cypress.io
16 3 (0.85%) webpack
General
1 90 (25.57%) Finance
2 71 (20.17%) Banking
3 29 (8.24%) Front Office
4 22 (6.25%) Investment Banking
5 7 (1.99%) Financial Institution
6 5 (1.42%) Games
7 4 (1.14%) Automotive
8 2 (0.57%) Retail
9 1 (0.28%) Advertising
9 1 (0.28%) Law
9 1 (0.28%) Mandarin Language
9 1 (0.28%) Manufacturing
9 1 (0.28%) Pharmaceutical
9 1 (0.28%) Police
9 1 (0.28%) Retail Banking
Job Titles
1 266 (75.57%) Developer
2 127 (36.08%) Android Developer
3 62 (17.61%) Senior Developer
4 59 (16.76%) Java Developer
5 31 (8.81%) Software Engineer
6 29 (8.24%) Scala Developer
7 26 (7.39%) Senior Scala Developer
8 23 (6.53%) Senior Android Developer
9 20 (5.68%) Developer/Software Engineer
10 16 (4.55%) Android Engineer
10 16 (4.55%) Full Stack Developer
11 13 (3.69%) Mobile Developer
11 13 (3.69%) React Developer
12 12 (3.41%) Java Android Developer
12 12 (3.41%) Lead Developer
13 11 (3.13%) Python Developer
14 10 (2.84%) Applications Developer
14 10 (2.84%) DevOps Engineer
14 10 (2.84%) Java Engineer
15 8 (2.27%) iOS Developer
Libraries, Frameworks & Software Standards
1 76 (21.59%) RxJava
2 61 (17.33%) Spring
3 51 (14.49%) RESTful
4 47 (13.35%) React
5 42 (11.93%) Retrofit
6 41 (11.65%) Dagger
7 36 (10.23%) Kafka
8 35 (9.94%) Material Design
9 33 (9.38%) AngularJS
9 33 (9.38%) Web Services
10 30 (8.52%) Vue.js
11 29 (8.24%) Spring Boot
12 28 (7.95%) Akka
13 26 (7.39%) HTML
14 24 (6.82%) CSS
15 23 (6.53%) Android SDK
16 21 (5.97%) Guice
16 21 (5.97%) JAAS
16 21 (5.97%) REST
16 21 (5.97%) Spring Security
Miscellaneous
1 72 (20.45%) Mobile App
2 39 (11.08%) User Experience
3 25 (7.10%) Greenfield Project
3 25 (7.10%) Hedge funds
4 24 (6.82%) Foreign Exchange (FX)
5 23 (6.53%) Derivative
5 23 (6.53%) Equities
5 23 (6.53%) Fixed Income
6 13 (3.69%) Mobile Banking
7 11 (3.13%) Mobile Payment
7 11 (3.13%) Virtual Team
8 10 (2.84%) Analytical Skills
9 6 (1.70%) Self-Motivation
10 5 (1.42%) Algorithms
10 5 (1.42%) Data Structures
11 3 (0.85%) Enterprise Software
12 2 (0.57%) Management Information System
12 2 (0.57%) Over-the-Top Content
12 2 (0.57%) Video on Demand
12 2 (0.57%) Video\Live Streaming
Operating Systems
1 182 (51.70%) Android
2 38 (10.80%) Apple iOS
3 5 (1.42%) Linux
4 3 (0.85%) Windows
5 2 (0.57%) Unix
6 1 (0.28%) tvOS
Processes & Methodologies
1 185 (52.56%) Agile Software Development
2 156 (44.32%) Android Development
3 92 (26.14%) Software Engineering
4 71 (20.17%) Microservices
5 54 (15.34%) DevOps
6 52 (14.77%) MVVM
7 49 (13.92%) Fintech
8 46 (13.07%) TDD
9 45 (12.78%) Continuous Integration
10 44 (12.50%) SDLC
11 41 (11.65%) Test Automation
12 38 (10.80%) Continuous Delivery
12 38 (10.80%) OO
12 38 (10.80%) Scrum
13 37 (10.51%) Architectural Design
14 32 (9.09%) Mobile Development
15 31 (8.81%) Computer Science
16 25 (7.10%) Asset Management
17 24 (6.82%) Dependency Injection
18 23 (6.53%) Pair Programming
Programming Languages
1 257 (73.01%) Java
2 79 (22.44%) Scala
3 64 (18.18%) Python
4 63 (17.90%) JavaScript
5 52 (14.77%) SQL
6 40 (11.36%) Java 8
7 25 (7.10%) Apple Swift
8 15 (4.26%) Objective-C
9 12 (3.41%) Bash Shell
10 11 (3.13%) C#
10 11 (3.13%) TypeScript
11 9 (2.56%) C
11 9 (2.56%) C++
12 6 (1.70%) Go
13 5 (1.42%) ES6
14 2 (0.57%) PHP
14 2 (0.57%) Ruby
15 1 (0.28%) Clojure
15 1 (0.28%) ES7
15 1 (0.28%) Shell Script
Qualifications
1 18 (5.11%) Degree
2 7 (1.99%) Computer Science Degree
3 3 (0.85%) ISTQB
3 3 (0.85%) ISTQB Foundation Certification
3 3 (0.85%) Security Cleared
4 2 (0.57%) SC Cleared
5 1 (0.28%) DBS Check
5 1 (0.28%) Master's Degree
5 1 (0.28%) SANS
Quality Assurance & Compliance
1 5 (1.42%) QA
2 1 (0.28%) WCAG
System Software
1 40 (11.36%) Docker
2 1 (0.28%) Virtual Machines
Systems Management
1 40 (11.36%) Prometheus
2 37 (10.51%) Kubernetes
3 20 (5.68%) Zipkin
4 9 (2.56%) Ansible
5 4 (1.14%) Terraform
6 1 (0.28%) Graphite
Vendors
1 19 (5.40%) AppDynamics
1 19 (5.40%) Splunk
2 15 (4.26%) MuleSoft
3 13 (3.69%) Google
4 4 (1.14%) Xamarin
5 3 (0.85%) CA
5 3 (0.85%) CA Agile Central
5 3 (0.85%) OutSystems
5 3 (0.85%) Salesforce.com
6 2 (0.57%) Apple
6 2 (0.57%) Oracle
7 1 (0.28%) Adobe
7 1 (0.28%) Capita
7 1 (0.28%) Cognizant
7 1 (0.28%) Facebook
7 1 (0.28%) IBM