Period
to 7 March 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 7 March 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
7 Mar 2021
Same period 2020 Same period 2019
Rank 194 315 523
Rank change year-on-year +121 +208 +165
Contract jobs citing Kotlin 641 508 388
As % of all contract jobs advertised in the UK 1.33% 0.77% 0.40%
As % of the Programming Languages category 3.24% 1.89% 0.92%
Number of daily rates quoted 672 381 308
Median daily rate £525 £500 £515
Median daily rate % change year-on-year +5.00% -2.91% +8.42%
10th Percentile £400 £375 £400
90th Percentile £713 £713 £675
UK excluding London median daily rate £450 £450 £425
% change year-on-year - +5.88% +3.03%
Number of hourly rates quoted 10 12 2
Median hourly rate £45.00 £58.25 £63.65
Median hourly rate % change year-on-year -22.75% -8.48% +154.60%
10th Percentile £40.00 £42.69 £61.52
90th Percentile £64.44 £68.93 £67.07
UK excluding London median hourly rate - £44.50 £63.65
% change year-on-year - -30.09% +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 19,782 26,917 42,352
As % of all contract IT jobs advertised in the UK 41.13% 40.75% 43.61%
Number of daily rates quoted 13,821 18,881 30,050
Median daily rate £488 £480 £475
Median daily rate % change year-on-year +1.56% +1.05% +3.26%
10th Percentile £313 £325 £320
90th Percentile £675 £650 £650
UK excluding London median daily rate £425 £438 £425
% change year-on-year -2.86% +2.94% +6.25%
Number of hourly rates quoted 461 516 643
Median hourly rate £42.50 £43.00 £42.50
Median hourly rate % change year-on-year -1.16% +1.18% +6.25%
10th Percentile £15.46 £17.11 £16.80
90th Percentile £61.00 £55.00 £52.50
Median hourly rate £40.00 £42.50 £42.50
% change year-on-year -5.88% - +6.25%

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 7 March 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 7 March 2021.

Hourly rate histogram for Kotlin in the UK

Kotlin
Top 11 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 7 March 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 +156 594 £525 +5.00% 249
London +125 506 £525 -0.94% 158
Work from Home -91 190 £525 +13.51% 90
UK excluding London +48 71 £450 - 96
North of England +48 35 £450 -5.13% 33
Yorkshire +32 27 £450 -5.26% 6
South East +77 20 £495 +16.47% 15
South West +79 11 £460 -6.60% 13
North West +42 8 £400 -5.88% 19
Scotland -14 4 £506 +2.53% 3
Wales +19 1 £388 -8.82% 1

For the 6 months to 7 March 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.

1 503 (78.47%) Java
2 358 (55.85%) Agile Software Development
3 289 (45.09%) Software Engineering
4 283 (44.15%) Finance
5 251 (39.16%) AWS
6 245 (38.22%) Android
7 239 (37.29%) JavaScript
8 235 (36.66%) React
9 220 (34.32%) Python
10 200 (31.20%) Front Office
11 195 (30.42%) Android Development
12 174 (27.15%) Web Services
13 169 (26.37%) Asset Management
14 151 (23.56%) Node.js
15 145 (22.62%) Kubernetes
16 143 (22.31%) Mobile App
16 143 (22.31%) TDD
17 141 (22.00%) Docker
18 128 (19.97%) Git (software)
19 120 (18.72%) Azure
20 119 (18.56%) Jenkins
21 116 (18.10%) Equities
22 111 (17.32%) Derivative
23 109 (17.00%) Spring
23 109 (17.00%) Microservices
24 108 (16.85%) User Experience
25 106 (16.54%) Scala
25 106 (16.54%) Test Automation
26 105 (16.38%) SQL
27 104 (16.22%) Investment Management

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 67 (10.45%) Apache
2 44 (6.86%) Apache Spark
3 42 (6.55%) Cloud Foundry
4 39 (6.08%) Confluence
5 15 (2.34%) Mule
6 13 (2.03%) WebSphere
7 12 (1.87%) WebLogic
8 9 (1.40%) Apache Airflow
8 9 (1.40%) Elasticsearch
9 3 (0.47%) CMS
10 1 (0.16%) SharePoint
Applications
1 2 (0.31%) Sketch
1 2 (0.31%) Zeplin
Business Applications
1 2 (0.31%) Dynamics NAV
Cloud Services
1 251 (39.16%) AWS
2 120 (18.72%) Azure
3 84 (13.10%) GCP
4 75 (11.70%) GitHub
5 64 (9.98%) Serverless
6 59 (9.20%) AWS Lambda
7 58 (9.05%) Amazon S3
8 57 (8.89%) Amazon EC2
9 29 (4.52%) PaaS
10 26 (4.06%) Slack
11 19 (2.96%) IaaS
12 15 (2.34%) Bitrise
13 11 (1.72%) Cloud Computing
14 10 (1.56%) Amazon ECS
15 9 (1.40%) Firebase
16 8 (1.25%) SaaS
17 6 (0.94%) Google Play
18 4 (0.62%) BrowserStack
19 3 (0.47%) OpenShift
19 3 (0.47%) Sauce Labs
Communications & Networking
1 15 (2.34%) HTTP
2 13 (2.03%) HTTPS
3 4 (0.62%) Network Security
4 2 (0.31%) NFC
5 1 (0.16%) Wi-Fi
Database & Business Intelligence
1 66 (10.30%) Amazon DynamoDB
2 58 (9.05%) Apache Ignite
3 47 (7.33%) MongoDB
4 40 (6.24%) NoSQL
5 19 (2.96%) SQL Server
6 14 (2.18%) SQLite
7 12 (1.87%) Blockchain
8 11 (1.72%) Hadoop
9 9 (1.40%) Amazon RDS
9 9 (1.40%) Relational Database
10 7 (1.09%) Redis
11 6 (0.94%) Couchbase
12 5 (0.78%) Apache Cassandra
12 5 (0.78%) Hazelcast
12 5 (0.78%) MySQL
13 3 (0.47%) InfluxDB
13 3 (0.47%) PostgreSQL
14 2 (0.31%) Big Data
15 1 (0.16%) Azure SQL Database
15 1 (0.16%) HBase
Development Applications
1 128 (19.97%) Git (software)
2 119 (18.56%) Jenkins
3 69 (10.76%) JIRA
4 67 (10.45%) JUnit
5 59 (9.20%) Mockito
6 44 (6.86%) Android Studio
7 40 (6.24%) Maven
8 32 (4.99%) Gradle
9 27 (4.21%) git-flow
10 26 (4.06%) Xcode
11 25 (3.90%) Sonatype Nexus
12 22 (3.43%) CocoaPods
13 18 (2.81%) Cucumber
14 15 (2.34%) IntelliJ
15 13 (2.03%) Cypress.io
15 13 (2.03%) JMeter
16 12 (1.87%) Ant
16 12 (1.87%) Selenium
16 12 (1.87%) TeamCity
17 11 (1.72%) Appium
General
1 283 (44.15%) Finance
2 200 (31.20%) Front Office
3 85 (13.26%) Banking
4 12 (1.87%) Games
4 12 (1.87%) Investment Banking
5 9 (1.40%) Retail Banking
6 5 (0.78%) Automotive
6 5 (0.78%) Law
6 5 (0.78%) Public Sector
7 4 (0.62%) Back Office
7 4 (0.62%) German Language
7 4 (0.62%) Retail
7 4 (0.62%) Telecoms
8 3 (0.47%) Advertising
8 3 (0.47%) Financial Institution
8 3 (0.47%) Manufacturing
8 3 (0.47%) Marketing
9 2 (0.31%) Electronics
9 2 (0.31%) Multimedia
10 1 (0.16%) Publishing
Job Titles
1 486 (75.82%) Developer
2 144 (22.46%) Android Developer
3 128 (19.97%) Software Engineer
4 102 (15.91%) React Developer
5 96 (14.98%) Java Developer
6 93 (14.51%) Developer/Software Engineer
7 72 (11.23%) Python Developer
8 69 (10.76%) Python Engineer
9 67 (10.45%) Python Software Engineer
10 59 (9.20%) UI Developer
11 58 (9.05%) Designer
11 58 (9.05%) UI Designer
11 58 (9.05%) UI Engineer
11 58 (9.05%) UI/UX Designer
11 58 (9.05%) UI/UX Developer
11 58 (9.05%) UX Designer
11 58 (9.05%) UX Developer
11 58 (9.05%) UX Engineer
12 47 (7.33%) Senior Developer
13 41 (6.40%) Java Engineer
Libraries, Frameworks & Software Standards
1 235 (36.66%) React
2 174 (27.15%) Web Services
3 151 (23.56%) Node.js
4 109 (17.00%) Spring
5 96 (14.98%) RxJava
6 89 (13.88%) REST
7 85 (13.26%) RESTful
8 75 (11.70%) AngularJS
8 75 (11.70%) Spring Boot
9 73 (11.39%) Vue.js
10 59 (9.20%) JSON
11 50 (7.80%) Dagger
12 46 (7.18%) gRPC
13 38 (5.93%) Kafka
14 36 (5.62%) Protocol Buffers
15 35 (5.46%) .NET
16 30 (4.68%) CSS
16 30 (4.68%) HTML
17 27 (4.21%) GraphQL
18 26 (4.06%) Material Design
Miscellaneous
1 143 (22.31%) Mobile App
2 116 (18.10%) Equities
3 111 (17.32%) Derivative
4 108 (16.85%) User Experience
5 102 (15.91%) Fixed Income
6 79 (12.32%) Foreign Exchange (FX)
7 50 (7.80%) Hedge funds
8 35 (5.46%) Greenfield Project
9 17 (2.65%) Mobile Payment
10 16 (2.50%) Data Structures
11 15 (2.34%) Analytical Skills
11 15 (2.34%) Virtual Team
12 13 (2.03%) Cloud Native
13 9 (1.40%) Credit Risk
13 9 (1.40%) Enterprise Software
13 9 (1.40%) Public Cloud
14 8 (1.25%) Equity Derivative
15 4 (0.62%) Animation
15 4 (0.62%) Over-the-Top Content
15 4 (0.62%) Video\Live Streaming
Operating Systems
1 245 (38.22%) Android
2 83 (12.95%) Apple iOS
3 9 (1.40%) Linux
4 7 (1.09%) Windows
5 5 (0.78%) Android TV
6 4 (0.62%) Unix
7 3 (0.47%) Mac OS
8 1 (0.16%) Embedded Linux
8 1 (0.16%) Mac OS X
8 1 (0.16%) Solaris
Processes & Methodologies
1 358 (55.85%) Agile Software Development
2 289 (45.09%) Software Engineering
3 195 (30.42%) Android Development
4 169 (26.37%) Asset Management
5 143 (22.31%) TDD
6 109 (17.00%) Microservices
7 106 (16.54%) Test Automation
8 104 (16.22%) Investment Management
9 85 (13.26%) Pair Programming
10 80 (12.48%) Continuous Integration
11 77 (12.01%) Scrum
12 76 (11.86%) Continuous Delivery
13 74 (11.54%) Release Management
14 72 (11.23%) Portfolio Management
15 71 (11.08%) DevOps
15 71 (11.08%) Mobile Development
16 62 (9.67%) SDLC
17 61 (9.52%) MVVM
18 59 (9.20%) Wireframes
19 58 (9.05%) Release Automation
Programming Languages
1 503 (78.47%) Java
2 239 (37.29%) JavaScript
3 220 (34.32%) Python
4 106 (16.54%) Scala
5 105 (16.38%) SQL
6 93 (14.51%) TypeScript
7 81 (12.64%) C#
8 73 (11.39%) Java 8
9 71 (11.08%) Apple Swift
10 51 (7.96%) C++
11 28 (4.37%) Clojure
12 25 (3.90%) Objective-C
13 16 (2.50%) Go
14 7 (1.09%) Dart
15 6 (0.94%) C
16 5 (0.78%) PHP
17 4 (0.62%) ClojureScript
17 4 (0.62%) Groovy
17 4 (0.62%) Ruby
18 3 (0.47%) ES6
Qualifications
1 74 (11.54%) Degree
2 13 (2.03%) Computer Science Degree
3 8 (1.25%) TOGAF Certification
4 7 (1.09%) SC Cleared
4 7 (1.09%) Security Cleared
5 3 (0.47%) BPSS Clearance
6 2 (0.31%) ISTQB
6 2 (0.31%) ISTQB Foundation Certification
6 2 (0.31%) PhD
7 1 (0.16%) Master's Degree
7 1 (0.16%) SANS
Quality Assurance & Compliance
1 9 (1.40%) QA
2 2 (0.31%) ISO 20022
2 2 (0.31%) SEPA
2 2 (0.31%) TARGET2
3 1 (0.16%) Disclosure Scotland
3 1 (0.16%) PSD2
System Software
1 141 (22.00%) Docker
2 1 (0.16%) HDFS
Systems Management
1 145 (22.62%) Kubernetes
2 97 (15.13%) Terraform
3 28 (4.37%) Prometheus
4 9 (1.40%) Ansible
4 9 (1.40%) Zipkin
5 4 (0.62%) Grafana
5 4 (0.62%) Istio
6 3 (0.47%) Puppet
7 1 (0.16%) HP Fortify
7 1 (0.16%) Rancher
Vendors
1 41 (6.40%) Splunk
2 40 (6.24%) AppDynamics
3 36 (5.62%) Bloomberg
4 19 (2.96%) MuleSoft
5 11 (1.72%) Oracle
6 9 (1.40%) CA Agile Central
7 8 (1.25%) CA
7 8 (1.25%) Google
8 7 (1.09%) Microsoft
9 5 (0.78%) Xamarin
10 4 (0.62%) Apple
11 3 (0.47%) Cognizant
11 3 (0.47%) Facebook
11 3 (0.47%) Salesforce.com
11 3 (0.47%) Solace
12 2 (0.31%) IBM
12 2 (0.31%) SAP
12 2 (0.31%) SendGrid
12 2 (0.31%) Telerik
13 1 (0.16%) Atlassian