Period
to 28 October 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 28 October 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
28 Oct 2021
Same period 2020 Same period 2019
Rank 193 102 277
Rank change year-on-year -91 +175 +128
Contract jobs citing Kotlin 524 375 337
As % of all contract jobs advertised in London 1.44% 2.61% 0.92%
As % of the Programming Languages category 3.17% 5.21% 1.93%
Number of daily rates quoted 431 302 259
10th Percentile £438 £413 £407
25th Percentile £483 £463 £455
Median daily rate (50th Percentile) £575 £564 £550
Median % change year-on-year +2.00% +2.50% +4.76%
75th Percentile £688 £661 £631
90th Percentile £700 £725 £715
England median daily rate £550 £550 £525
% change year-on-year - +4.76% +2.94%
Number of hourly rates quoted 6 1 0
Median hourly rate £66.20 £42.00 -
Median % change year-on-year +57.62% - -
England median hourly rate £64.00 £42.00 £70.00
% change year-on-year +52.38% -40.00% -

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 16,543 7,204 17,453
As % of all contract IT jobs advertised in London 45.59% 50.16% 47.76%
Number of daily rates quoted 12,558 5,295 13,364
10th Percentile £400 £350 £363
25th Percentile £475 £425 £431
Median daily rate (50th Percentile) £570 £525 £525
Median % change year-on-year +8.57% - -
75th Percentile £675 £638 £618
90th Percentile £750 £738 £700
England median daily rate £525 £490 £488
% change year-on-year +7.14% +0.51% +2.63%
Number of hourly rates quoted 96 44 114
10th Percentile £24.50 £21.08 £17.88
25th Percentile £35.25 £24.63 £25.06
Median hourly rate £51.88 £36.00 £47.50
Median % change year-on-year +44.10% -24.21% +21.79%
75th Percentile £63.81 £42.25 £52.50
90th Percentile £70.55 £54.70 £55.50
England median hourly rate £45.50 £37.93 £45.00
% change year-on-year +19.97% -15.72% +7.14%

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 28 October 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
Hourly Rate Histogram in London

Hourly rate distribution of jobs citing Kotlin in London over the 6 months to 28 October 2021.

Hourly rate histogram 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 28 October 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 -44 62 £606 +6.36% 79
East London -8 8 £480 -10.07% 30
West London -18 3 £500 - 20
South London - 3 £523 -
Kotlin
England

For the 6 months to 28 October 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.

1 407 (77.67%) Java
2 259 (49.43%) Agile Software Development
3 199 (37.98%) Software Engineering
4 193 (36.83%) Finance
5 188 (35.88%) JavaScript
6 177 (33.78%) Android
7 173 (33.02%) AWS
8 163 (31.11%) React
9 145 (27.67%) Android Development
10 132 (25.19%) Python
11 131 (25.00%) TDD
12 121 (23.09%) TypeScript
13 116 (22.14%) Full Stack Development
14 112 (21.37%) Azure
15 107 (20.42%) Front Office
16 106 (20.23%) Asset Management
16 106 (20.23%) Web Services
17 103 (19.66%) Spring
18 100 (19.08%) Kubernetes
19 97 (18.51%) Microservices
20 96 (18.32%) GCP
20 96 (18.32%) Derivative
21 91 (17.37%) SQL
22 90 (17.18%) Docker
23 88 (16.79%) Scala
24 87 (16.60%) Foreign Exchange (FX)
24 87 (16.60%) AngularJS
25 83 (15.84%) Vue.js
25 83 (15.84%) Equities
26 82 (15.65%) Fixed Income

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 24 (4.58%) Apache
2 23 (4.39%) Apache Airflow
3 16 (3.05%) Apache Spark
4 15 (2.86%) Confluence
4 15 (2.86%) Tomcat
5 12 (2.29%) Elasticsearch
6 8 (1.53%) Cloud Foundry
7 1 (0.19%) Adobe Experience Manager
7 1 (0.19%) Apache Pig
7 1 (0.19%) IBM Domino
Applications
1 1 (0.19%) Photoshop
Business Applications
1 3 (0.57%) Magento
1 3 (0.57%) Payment Gateway
2 2 (0.38%) Distributed Ledger
2 2 (0.38%) SAP Hybris
3 1 (0.19%) Oracle Cash Management
Cloud Services
1 173 (33.02%) AWS
2 112 (21.37%) Azure
3 96 (18.32%) GCP
4 67 (12.79%) Serverless
5 59 (11.26%) AWS Lambda
6 57 (10.88%) Amazon S3
7 55 (10.50%) Amazon EC2
8 20 (3.82%) GitHub
9 10 (1.91%) Firebase
10 6 (1.15%) OpenShift
11 5 (0.95%) Google Play
11 5 (0.95%) npm
12 4 (0.76%) Cloud Computing
12 4 (0.76%) Google Compute Engine
12 4 (0.76%) SaaS
13 3 (0.57%) AWS CloudFormation
13 3 (0.57%) Azure App Service
13 3 (0.57%) IaaS
14 2 (0.38%) Bitrise
14 2 (0.38%) Pulumi
Communications & Networking
1 28 (5.34%) HTTP
2 9 (1.72%) HTTPS
3 7 (1.34%) Internet
4 5 (0.95%) 2G
5 3 (0.57%) DNS
5 3 (0.57%) Intranet
6 2 (0.38%) Bluetooth
6 2 (0.38%) SSL
6 2 (0.38%) Wi-Fi
7 1 (0.19%) Broadband
7 1 (0.19%) DHCP
7 1 (0.19%) Firewall
7 1 (0.19%) Multicast
Database & Business Intelligence
1 54 (10.31%) Amazon DynamoDB
2 31 (5.92%) SQL Server
3 26 (4.96%) Relational Database
4 23 (4.39%) Amazon Athena
4 23 (4.39%) Apache Ignite
5 20 (3.82%) NoSQL
6 19 (3.63%) PostgreSQL
7 14 (2.67%) Big Data
7 14 (2.67%) Couchbase
7 14 (2.67%) Redis
8 13 (2.48%) Apache Hive
8 13 (2.48%) Data Warehouse
9 12 (2.29%) Azure SQL Data Warehouse
9 12 (2.29%) Parquet
10 11 (2.10%) SQLite
11 9 (1.72%) MongoDB
12 8 (1.53%) Hazelcast
12 8 (1.53%) RDBMS
12 8 (1.53%) Tableau
13 6 (1.15%) Blockchain
Development Applications
1 55 (10.50%) Git (software)
2 47 (8.97%) Jenkins
3 30 (5.73%) Maven
4 29 (5.53%) JUnit
5 28 (5.34%) JIRA
6 27 (5.15%) Android Studio
7 18 (3.44%) Gradle
8 15 (2.86%) IntelliJ
9 14 (2.67%) Subversion
10 13 (2.48%) Atlassian Bamboo
10 13 (2.48%) Mockito
11 12 (2.29%) Hudson
12 10 (1.91%) GitLab
12 10 (1.91%) Postman
13 9 (1.72%) Calabash
14 6 (1.15%) Appium
14 6 (1.15%) CircleCI
14 6 (1.15%) Crashlytics
15 5 (0.95%) Grunt
15 5 (0.95%) webpack
General
1 193 (36.83%) Finance
2 107 (20.42%) Front Office
3 77 (14.69%) Social Skills
4 52 (9.92%) Banking
5 26 (4.96%) Games
6 19 (3.63%) Manufacturing
7 14 (2.67%) Investment Banking
8 13 (2.48%) Analytical Skills
9 12 (2.29%) Inclusion and Diversity
10 10 (1.91%) Retail
10 10 (1.91%) Retail Banking
11 8 (1.53%) Automotive
11 8 (1.53%) Publishing
11 8 (1.53%) Telecoms
12 6 (1.15%) Law
13 5 (0.95%) Marketing
13 5 (0.95%) Public Sector
14 4 (0.76%) Presentation Skills
15 3 (0.57%) Electronics
16 2 (0.38%) Financial Institution
Job Titles
1 398 (75.95%) Developer
2 133 (25.38%) Android Developer
3 82 (15.65%) Software Engineer
4 73 (13.93%) React Developer
5 57 (10.88%) Java Developer
6 56 (10.69%) Developer/Software Engineer
6 56 (10.69%) Python Developer
7 54 (10.31%) Python Engineer
7 54 (10.31%) Python Software Engineer
8 51 (9.73%) Senior Developer
9 40 (7.63%) Lead Developer
10 35 (6.68%) JavaScript Developer
11 31 (5.92%) JavaScript Engineer
12 29 (5.53%) Front Office Developer
13 26 (4.96%) Java Engineer
14 25 (4.77%) AWS Engineer
15 24 (4.58%) UI Engineer
15 24 (4.58%) UI/UX Designer
15 24 (4.58%) UI/UX Developer
15 24 (4.58%) UX Engineer
Libraries, Frameworks & Software Standards
1 163 (31.11%) React
2 106 (20.23%) Web Services
3 103 (19.66%) Spring
4 87 (16.60%) AngularJS
5 83 (15.84%) Vue.js
6 72 (13.74%) Node.js
7 69 (13.17%) RESTful
8 61 (11.64%) REST
9 57 (10.88%) GraphQL
10 54 (10.31%) Spring Boot
11 51 (9.73%) RxJava
12 43 (8.21%) Android SDK
13 42 (8.02%) HTML
14 38 (7.25%) Kafka
15 37 (7.06%) CSS
15 37 (7.06%) Dagger
15 37 (7.06%) React Native
16 34 (6.49%) JSON
17 26 (4.96%) Retrofit
18 22 (4.20%) OAuth
Miscellaneous
1 96 (18.32%) Derivative
2 87 (16.60%) Foreign Exchange (FX)
3 83 (15.84%) Equities
4 82 (15.65%) Fixed Income
5 69 (13.17%) Mobile App
6 61 (11.64%) Greenfield Project
7 49 (9.35%) User Experience
8 28 (5.34%) Credit Risk
8 28 (5.34%) Hedge funds
9 24 (4.58%) Data Protection Act
10 15 (2.86%) Client/Server
11 8 (1.53%) Enterprise Software
11 8 (1.53%) Legacy Applications
12 6 (1.15%) Equity Derivative
12 6 (1.15%) Video\Live Streaming
13 5 (0.95%) Chromecast
13 5 (0.95%) Public Cloud
14 4 (0.76%) Data Structures
14 4 (0.76%) Mobile Banking
14 4 (0.76%) Virtual Team
Operating Systems
1 177 (33.78%) Android
2 54 (10.31%) Apple iOS
3 14 (2.67%) Unix
4 10 (1.91%) Linux
5 8 (1.53%) Windows
6 2 (0.38%) Android TV
6 2 (0.38%) Mac OS
Processes & Methodologies
1 259 (49.43%) Agile Software Development
2 199 (37.98%) Software Engineering
3 145 (27.67%) Android Development
4 131 (25.00%) TDD
5 116 (22.14%) Full Stack Development
6 106 (20.23%) Asset Management
7 97 (18.51%) Microservices
8 57 (10.88%) DevOps
9 52 (9.92%) Investment Management
9 52 (9.92%) Test Automation
10 47 (8.97%) Analytics
11 42 (8.02%) MVVM
12 41 (7.82%) Scrum
13 39 (7.44%) BDD
13 39 (7.44%) Pair Programming
14 36 (6.87%) Problem-Solving
15 35 (6.68%) Continuous Integration
16 33 (6.30%) Unit Testing
17 32 (6.11%) Data Protection
18 28 (5.34%) Risk Analytics
Programming Languages
1 407 (77.67%) Java
2 188 (35.88%) JavaScript
3 132 (25.19%) Python
4 121 (23.09%) TypeScript
5 91 (17.37%) SQL
6 88 (16.79%) Scala
7 41 (7.82%) C++
8 39 (7.44%) C#
9 35 (6.68%) Apple Swift
10 32 (6.11%) Java 8
11 23 (4.39%) Objective-C
12 15 (2.86%) Go
13 12 (2.29%) PL/SQL
14 9 (1.72%) C
15 5 (0.95%) Bash Shell
16 4 (0.76%) Groovy
16 4 (0.76%) PHP
16 4 (0.76%) Ruby
17 3 (0.57%) ES6
18 2 (0.38%) Java 11
Qualifications
1 36 (6.87%) Degree
2 4 (0.76%) Computer Science Degree
2 4 (0.76%) ISTQB
2 4 (0.76%) ISTQB Foundation Certification
3 2 (0.38%) AWS Certification
Quality Assurance & Compliance
1 5 (0.95%) Accessibility
1 5 (0.95%) QA
1 5 (0.95%) WCAG
2 2 (0.38%) GDPR
2 2 (0.38%) HIPAA
2 2 (0.38%) PMO
2 2 (0.38%) PSD2
3 1 (0.19%) ISO 20022
3 1 (0.19%) TARGET2
System Software
1 90 (17.18%) Docker
2 1 (0.19%) Apache ZooKeeper
Systems Management
1 100 (19.08%) Kubernetes
2 37 (7.06%) Terraform
3 15 (2.86%) Ansible
4 13 (2.48%) Oozie
5 12 (2.29%) Single Sign-On
6 10 (1.91%) Kibana
7 8 (1.53%) Docker Swarm
7 8 (1.53%) logstash
8 6 (1.15%) Opscode Chef
8 6 (1.15%) Puppet
9 5 (0.95%) Bugsnag
10 4 (0.76%) Prometheus
11 2 (0.38%) Zipkin
Vendors
1 24 (4.58%) Oracle
2 19 (3.63%) Google
3 12 (2.29%) Xamarin
4 11 (2.10%) SAP
5 6 (1.15%) Adobe
5 6 (1.15%) Apple
5 6 (1.15%) Confluent
5 6 (1.15%) hybris
6 5 (0.95%) CA
6 5 (0.95%) CA Agile Central
7 4 (0.76%) Salesforce.com
8 2 (0.38%) AppDynamics
8 2 (0.38%) Atlassian
8 2 (0.38%) BiZZdesign
8 2 (0.38%) Roku
8 2 (0.38%) SaltStack
8 2 (0.38%) Samsung
8 2 (0.38%) Splunk
9 1 (0.19%) Cloudera
9 1 (0.19%) Hortonworks