Period
to 1 December 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 1 December 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
1 Dec 2021
Same period 2020 Same period 2019
Rank 343 182 386
Rank change year-on-year -161 +204 +200
Contract jobs citing Kotlin 670 550 505
As % of all contract jobs advertised in the UK 0.75% 1.49% 0.63%
As % of the Programming Languages category 1.91% 3.57% 1.52%
Number of daily rates quoted 533 436 342
10th Percentile £419 £400 £376
25th Percentile £463 £448 £423
Median daily rate (50th Percentile) £550 £550 £500
Median % change year-on-year - +10.00% -2.91%
75th Percentile £665 £641 £600
90th Percentile £700 £725 £700
UK excluding London median daily rate £475 £450 £450
% change year-on-year +5.56% - +7.14%
Number of hourly rates quoted 8 2 3
10th Percentile £55.30 £40.20 £42.89
25th Percentile £64.00 £40.50 £43.46
Median hourly rate £69.20 £41.00 £48.85
Median % change year-on-year +68.78% -16.07% -
75th Percentile £73.51 £41.50 £66.01
90th Percentile £108.50 £41.80 £73.66
UK excluding London median hourly rate £64.00 - £45.00

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 with a requirement for coding skills.

All Programming Languages
UK
Contract vacancies with a requirement for coding skills 35,131 15,422 33,286
As % of all contract IT jobs advertised in the UK 39.33% 41.82% 41.31%
Number of daily rates quoted 25,506 10,819 23,282
10th Percentile £363 £310 £325
25th Percentile £430 £388 £400
Median daily rate (50th Percentile) £525 £475 £475
Median % change year-on-year +10.53% - -
75th Percentile £638 £588 £575
90th Percentile £713 £675 £650
UK excluding London median daily rate £475 £425 £425
% change year-on-year +11.76% - -
Number of hourly rates quoted 463 356 616
10th Percentile £18.50 £13.00 £17.11
25th Percentile £26.44 £22.29 £29.38
Median hourly rate £47.50 £42.00 £43.75
Median % change year-on-year +13.10% -4.00% +4.17%
75th Percentile £60.00 £50.00 £50.00
90th Percentile £70.00 £58.75 £55.00
UK excluding London median hourly rate £45.50 £42.00 £43.00
% change year-on-year +8.33% -2.33% +1.18%

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 December 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 1 December 2021.

Hourly rate histogram for Kotlin in the UK

Kotlin
Top 15 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 December 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 -151 599 £550 - 301
London -120 494 £580 +0.87% 207
Work from Home -94 231 £550 +15.79% 80
UK excluding London -166 72 £475 +5.56% 104
North of England -112 24 £475 +5.56% 39
South East -80 17 £450 -5.26% 15
Yorkshire -78 15 £475 +5.56% 7
Midlands - 14 £425 - 8
North West -60 9 £475 +18.75% 25
Scotland -75 9 £513 +7.89% 4
West Midlands - 9 £400 - 2
East Midlands - 5 £510 - 6
South West -54 4 £500 +8.70% 14
East of England - 3 £775 - 16
Wales -26 1 £725 +45.00% 3

For the 6 months to 1 December 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.

1 516 (77.01%) Java
2 334 (49.85%) Agile Software Development
3 268 (40.00%) Android
4 213 (31.79%) Software Engineering
4 213 (31.79%) Android Development
5 208 (31.04%) Finance
6 198 (29.55%) JavaScript
7 191 (28.51%) AWS
8 171 (25.52%) React
9 170 (25.37%) TDD
10 135 (20.15%) Python
11 129 (19.25%) TypeScript
12 125 (18.66%) Full Stack Development
13 121 (18.06%) Azure
14 118 (17.61%) Mobile App
15 117 (17.46%) Spring
16 116 (17.31%) Microservices
17 110 (16.42%) Kubernetes
18 107 (15.97%) Social Skills
19 105 (15.67%) Docker
20 99 (14.78%) Scala
21 96 (14.33%) GCP
22 94 (14.03%) SQL
22 94 (14.03%) Front Office
23 93 (13.88%) Web Services
23 93 (13.88%) Asset Management
24 90 (13.43%) REST
25 87 (12.99%) Node.js
25 87 (12.99%) AngularJS
26 86 (12.84%) Apple iOS

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 30 (4.48%) Confluence
2 26 (3.88%) Apache Airflow
3 25 (3.73%) Apache
4 19 (2.84%) Tomcat
5 16 (2.39%) Apache Spark
5 16 (2.39%) Elasticsearch
6 10 (1.49%) Cloud Foundry
7 6 (0.90%) CMS
8 1 (0.15%) Apache Pig
8 1 (0.15%) Apache Solr
8 1 (0.15%) CoreMedia CMS
8 1 (0.15%) JBoss
8 1 (0.15%) WebSphere
Applications
1 1 (0.15%) Photoshop
Business Applications
1 5 (0.75%) Distributed Ledger
2 4 (0.60%) Shopify
3 3 (0.45%) Magento
4 1 (0.15%) SAP Hybris
Cloud Services
1 191 (28.51%) AWS
2 121 (18.06%) Azure
3 96 (14.33%) GCP
4 80 (11.94%) Serverless
5 67 (10.00%) AWS Lambda
6 57 (8.51%) Amazon S3
7 51 (7.61%) Amazon EC2
8 36 (5.37%) GitHub
9 13 (1.94%) Firebase
9 13 (1.94%) Google Play
10 11 (1.64%) OpenShift
10 11 (1.64%) Slack
11 7 (1.04%) AWS CloudFormation
11 7 (1.04%) Bitrise
11 7 (1.04%) npm
11 7 (1.04%) SaaS
12 6 (0.90%) Amazon SQS
12 6 (0.90%) Datadog
13 5 (0.75%) Akamai
13 5 (0.75%) Amazon CloudWatch
Communications & Networking
1 25 (3.73%) HTTP
2 5 (0.75%) HTTPS
3 4 (0.60%) DNS
4 3 (0.45%) Intranet
5 2 (0.30%) 2G
5 2 (0.30%) DHCP
5 2 (0.30%) DVB
5 2 (0.30%) Firewall
5 2 (0.30%) Multicast
5 2 (0.30%) SSL
6 1 (0.15%) Internet
Database & Business Intelligence
1 56 (8.36%) Amazon DynamoDB
2 32 (4.78%) SQL Server
3 30 (4.48%) NoSQL
3 30 (4.48%) PostgreSQL
4 27 (4.03%) Relational Database
5 22 (3.28%) Amazon Athena
5 22 (3.28%) Apache Ignite
6 18 (2.69%) Data Warehouse
7 17 (2.54%) MongoDB
8 16 (2.39%) Big Data
8 16 (2.39%) Redis
9 15 (2.24%) Couchbase
10 13 (1.94%) Apache Hive
11 12 (1.79%) Azure SQL Data Warehouse
11 12 (1.79%) Parquet
12 10 (1.49%) Hazelcast
12 10 (1.49%) SQLite
13 9 (1.34%) RDBMS
14 8 (1.19%) Blockchain
14 8 (1.19%) Tableau
Development Applications
1 83 (12.39%) Git (software)
2 80 (11.94%) Jenkins
3 48 (7.16%) Android Studio
4 44 (6.57%) JIRA
5 43 (6.42%) Maven
6 31 (4.63%) Gradle
7 28 (4.18%) JUnit
8 16 (2.39%) Atlassian Bamboo
9 15 (2.24%) IntelliJ
10 13 (1.94%) Subversion
11 12 (1.79%) CircleCI
11 12 (1.79%) GitLab
11 12 (1.79%) Hudson
12 11 (1.64%) Cucumber
12 11 (1.64%) Mockito
12 11 (1.64%) Xcode
13 10 (1.49%) Bitbucket
13 10 (1.49%) Sonatype Nexus
14 9 (1.34%) git-flow
14 9 (1.34%) Postman
General
1 208 (31.04%) Finance
2 107 (15.97%) Social Skills
3 94 (14.03%) Front Office
4 61 (9.10%) Banking
5 29 (4.33%) Games
6 19 (2.84%) Manufacturing
6 19 (2.84%) Retail
7 16 (2.39%) Analytical Skills
8 13 (1.94%) Investment Banking
9 11 (1.64%) Inclusion and Diversity
10 9 (1.34%) Automotive
10 9 (1.34%) Retail Banking
11 8 (1.19%) Publishing
12 7 (1.04%) Law
13 5 (0.75%) Presentation Skills
14 3 (0.45%) Financial Institution
14 3 (0.45%) Military
14 3 (0.45%) Public Sector
15 2 (0.30%) Marketing
15 2 (0.30%) Telecoms
Job Titles
1 506 (75.52%) Developer
2 187 (27.91%) Android Developer
3 77 (11.49%) Software Engineer
4 71 (10.60%) Java Developer
5 69 (10.30%) React Developer
6 62 (9.25%) Senior Developer
7 53 (7.91%) Developer/Software Engineer
8 51 (7.61%) Python Engineer
9 50 (7.46%) Python Developer
10 49 (7.31%) Python Software Engineer
11 39 (5.82%) Lead Developer
12 36 (5.37%) JavaScript Developer
13 29 (4.33%) Senior Android Developer
14 28 (4.18%) AWS Engineer
14 28 (4.18%) Java Engineer
15 27 (4.03%) JavaScript Engineer
16 25 (3.73%) Front Office Developer
16 25 (3.73%) Mobile Developer
17 23 (3.43%) AWS Developer
18 22 (3.28%) AWS Software Engineer
Libraries, Frameworks & Software Standards
1 171 (25.52%) React
2 117 (17.46%) Spring
3 93 (13.88%) Web Services
4 90 (13.43%) REST
5 87 (12.99%) AngularJS
5 87 (12.99%) Node.js
6 85 (12.69%) Vue.js
7 72 (10.75%) Spring Boot
8 71 (10.60%) RESTful
9 60 (8.96%) RxJava
10 59 (8.81%) GraphQL
11 51 (7.61%) Android SDK
12 49 (7.31%) HTML
13 45 (6.72%) Kafka
14 43 (6.42%) CSS
15 40 (5.97%) Dagger
16 39 (5.82%) JSON
16 39 (5.82%) React Native
17 26 (3.88%) Retrofit
18 24 (3.58%) HTML5
Miscellaneous
1 118 (17.61%) Mobile App
2 83 (12.39%) Derivative
3 78 (11.64%) Foreign Exchange (FX)
4 75 (11.19%) Greenfield Project
5 74 (11.04%) Equities
6 73 (10.90%) Fixed Income
7 57 (8.51%) User Experience
8 26 (3.88%) Data Protection Act
9 24 (3.58%) Credit Risk
9 24 (3.58%) Hedge funds
10 16 (2.39%) Client/Server
11 10 (1.49%) Legacy Applications
12 9 (1.34%) Virtual Team
13 8 (1.19%) Chromecast
13 8 (1.19%) Cloud Native
13 8 (1.19%) Data Structures
13 8 (1.19%) Enterprise Software
14 7 (1.04%) iPad
14 7 (1.04%) Public Cloud
14 7 (1.04%) Self-Motivation
Operating Systems
1 268 (40.00%) Android
2 86 (12.84%) Apple iOS
3 18 (2.69%) Unix
4 12 (1.79%) Linux
5 8 (1.19%) Windows
6 3 (0.45%) Mac OS
7 2 (0.30%) Android TV
8 1 (0.15%) Alpine Linux
8 1 (0.15%) CentOS
Processes & Methodologies
1 334 (49.85%) Agile Software Development
2 213 (31.79%) Android Development
2 213 (31.79%) Software Engineering
3 170 (25.37%) TDD
4 125 (18.66%) Full Stack Development
5 116 (17.31%) Microservices
6 93 (13.88%) Asset Management
7 85 (12.69%) DevOps
8 70 (10.45%) Test Automation
9 66 (9.85%) Scrum
10 65 (9.70%) MVVM
11 56 (8.36%) BDD
12 52 (7.76%) Continuous Integration
13 48 (7.16%) Analytics
13 48 (7.16%) Pair Programming
14 46 (6.87%) Mobile Development
15 44 (6.57%) Investment Management
15 44 (6.57%) Unit Testing
16 41 (6.12%) Problem-Solving
17 37 (5.52%) iOS Development
Programming Languages
1 516 (77.01%) Java
2 198 (29.55%) JavaScript
3 135 (20.15%) Python
4 129 (19.25%) TypeScript
5 99 (14.78%) Scala
6 94 (14.03%) SQL
7 66 (9.85%) Apple Swift
8 40 (5.97%) Objective-C
9 39 (5.82%) C++
10 37 (5.52%) Java 8
11 36 (5.37%) C#
12 23 (3.43%) Go
13 12 (1.79%) C
13 12 (1.79%) PL/SQL
14 11 (1.64%) Bash Shell
15 7 (1.04%) Dart
16 6 (0.90%) Groovy
16 6 (0.90%) Shell Script
17 5 (0.75%) Java 11
17 5 (0.75%) Ruby
Qualifications
1 35 (5.22%) Degree
2 7 (1.04%) Security Cleared
3 6 (0.90%) Computer Science Degree
4 5 (0.75%) SC Cleared
5 4 (0.60%) ISTQB
5 4 (0.60%) ISTQB Foundation Certification
6 2 (0.30%) AWS Certification
7 1 (0.15%) CEH
7 1 (0.15%) CREST Certified
7 1 (0.15%) DV Cleared
7 1 (0.15%) OSCP
Quality Assurance & Compliance
1 9 (1.34%) Accessibility
2 7 (1.04%) QA
3 4 (0.60%) WCAG
4 2 (0.30%) PCI DSS
4 2 (0.30%) PMO
5 1 (0.15%) PSD2
System Software
1 105 (15.67%) Docker
2 2 (0.30%) Apache ZooKeeper
3 1 (0.15%) KVM
Systems Management
1 110 (16.42%) Kubernetes
2 47 (7.01%) Terraform
3 17 (2.54%) Ansible
4 13 (1.94%) Oozie
5 12 (1.79%) Single Sign-On
6 10 (1.49%) Kibana
7 9 (1.34%) Puppet
8 8 (1.19%) Docker Swarm
8 8 (1.19%) logstash
8 8 (1.19%) Opscode Chef
9 4 (0.60%) Bugsnag
10 3 (0.45%) Prometheus
11 1 (0.15%) Icinga
11 1 (0.15%) Istio
11 1 (0.15%) Kustomize
Vendors
1 30 (4.48%) Google
2 29 (4.33%) Oracle
3 12 (1.79%) Splunk
4 10 (1.49%) AppDynamics
5 9 (1.34%) Xamarin
6 8 (1.19%) Apple
6 8 (1.19%) SAP
7 7 (1.04%) Confluent
8 6 (0.90%) Atlassian
8 6 (0.90%) Elastic Path
9 5 (0.75%) Adobe
9 5 (0.75%) CA
9 5 (0.75%) CA Agile Central
9 5 (0.75%) Microsoft
10 4 (0.60%) hybris
11 3 (0.45%) Salesforce.com
12 2 (0.30%) Huawei
12 2 (0.30%) Red Hat
12 2 (0.30%) Samsung
12 2 (0.30%) Sencha