Period
to 23 August 2019

The following table provides summary statistics for contract job vacancies advertised in the City of 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 23 August 2019 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
Central London > City of London
6 months to
23 Aug 2019
Same period 2018 Same period 2017
Rank 163 181 232
Rank change year-on-year +18 +51 -
Contract jobs citing Kotlin 79 78 16
As % of all contract IT jobs advertised in the City of London 1.23% 1.12% 0.24%
As % of the Programming Languages category 2.49% 2.09% 0.47%
Number of daily rates quoted 68 71 12
City of London median daily rate £575 £600 £600
Median daily rate % change year-on-year -4.17% - -
10th Percentile £459 £475 £513
90th Percentile £741 £775 £638
Central London median daily rate £575 £600 £600
% change year-on-year -4.17% - -
Number of hourly rates quoted 0 0 0
City of London median hourly rate - - -
Central 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 advertised in the City of London with a requirement for coding skills.

All Programming Languages
City of London
Contract vacancies with a requirement for coding skills 3,177 3,735 3,432
As % of all contract IT jobs advertised in the City of London 49.55% 53.53% 51.55%
Number of daily rates quoted 2,572 3,104 2,751
City of London median daily rate £525 £525 £513
Median daily rate % change year-on-year - +2.44% +7.89%
10th Percentile £405 £368 £360
90th Percentile £675 £688 £675
Central London median daily rate £525 £525 £500
% change year-on-year - +5.00% +10.99%
Number of hourly rates quoted 24 16 12
City of London median hourly rate £35.00 £21.75 £22.99
Median hourly rate % change year-on-year +60.92% -5.40% +21.01%
10th Percentile £21.00 £12.50 £13.31
90th Percentile £56.50 £50.48 £36.73
Central London median hourly rate £35.00 £21.75 £28.35
% change year-on-year +60.92% -23.27% +49.18%

Kotlin
Job Vacancy Trend in the City of London

Job postings citing Kotlin as a percentage of all IT jobs advertised in the City of London.

Job vacancy trend for Kotlin in the City of London

Kotlin
Contractor Daily Rate Trend in the City of London

This chart provides the 3-month moving average for daily rates quoted in contract jobs citing Kotlin in the City of London.

Contractor daily rate trend for Kotlin in the City of London

Kotlin
Contractor Daily Rate Histogram in the City of London

The daily rate distribution of IT jobs citing Kotlin in the City of London over the 6 months to 23 August 2019.

Contractor daily rate histogram for Kotlin in the City of London

For the 6 months to 23 August 2019, 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 City of London region with a requirement for Kotlin.

1 65 (82.28%) Java
2 41 (51.90%) Android
3 36 (45.57%) Android Development
4 32 (40.51%) Agile Software Development
5 23 (29.11%) Microservices
6 19 (24.05%) TDD
7 18 (22.78%) Software Engineering
8 17 (21.52%) Kubernetes
9 14 (17.72%) Finance
9 14 (17.72%) Degree
9 14 (17.72%) Scala
9 14 (17.72%) Computer Science
10 13 (16.46%) Git (software)
10 13 (16.46%) Docker
11 12 (15.19%) Mobile App
11 12 (15.19%) Mathematics
11 12 (15.19%) Scrum
11 12 (15.19%) Python
12 11 (13.92%) Banking
12 11 (13.92%) User Experience
13 10 (12.66%) RxJava
13 10 (12.66%) Fintech
13 10 (12.66%) RESTful
14 9 (11.39%) Kafka
14 9 (11.39%) Retail
14 9 (11.39%) Spring
14 9 (11.39%) Software Delivery
15 8 (10.13%) Grafana
15 8 (10.13%) GraphQL
15 8 (10.13%) Greenfield Project

Kotlin
Co-occurring IT Skills in the City of 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 5 (6.33%) Apache Spark
2 4 (5.06%) Elasticsearch
3 2 (2.53%) Confluence
4 1 (1.27%) nginx
Cloud Services
1 7 (8.86%) AWS
2 5 (6.33%) GitHub
3 4 (5.06%) Amazon Kinesis
3 4 (5.06%) AWS Lambda
3 4 (5.06%) Fastly
3 4 (5.06%) Heroku
3 4 (5.06%) Serverless
4 2 (2.53%) Datadog
4 2 (2.53%) Google Play
5 1 (1.27%) Apigee
5 1 (1.27%) GCP
5 1 (1.27%) OpenShift
Communications & Networking
1 2 (2.53%) HTTP
Database & Business Intelligence
1 7 (8.86%) Redis
1 7 (8.86%) SQLite
2 6 (7.59%) PostgreSQL
3 5 (6.33%) Apache Hive
3 5 (6.33%) Big Data
3 5 (6.33%) Hadoop
4 4 (5.06%) Amazon DynamoDB
4 4 (5.06%) MySQL
4 4 (5.06%) Neo4j
5 3 (3.80%) Blockchain
5 3 (3.80%) NoSQL
5 3 (3.80%) Oracle Database
6 1 (1.27%) Apache Cassandra
6 1 (1.27%) FoundationDB
6 1 (1.27%) InfluxDB
6 1 (1.27%) MongoDB
Development Applications
1 13 (16.46%) Git (software)
2 7 (8.86%) JUnit
2 7 (8.86%) Subversion
3 6 (7.59%) Android Studio
4 5 (6.33%) Gradle
5 4 (5.06%) CircleCI
5 4 (5.06%) Jenkins
5 4 (5.06%) webpack
6 3 (3.80%) GoCD
6 3 (3.80%) Maven
6 3 (3.80%) TeamCity
7 2 (2.53%) Cucumber
7 2 (2.53%) JIRA
7 2 (2.53%) Mockito
8 1 (1.27%) Appium
8 1 (1.27%) GitLab
8 1 (1.27%) Hudson
8 1 (1.27%) Selenium
General
1 14 (17.72%) Finance
2 11 (13.92%) Banking
3 9 (11.39%) Retail
4 2 (2.53%) Retail Banking
5 1 (1.27%) Automotive
5 1 (1.27%) Front Office
5 1 (1.27%) Law
5 1 (1.27%) Marketing
5 1 (1.27%) Publishing
Job Titles
1 55 (69.62%) Developer
2 32 (40.51%) Android Developer
3 18 (22.78%) Senior Developer
4 13 (16.46%) Senior Android Developer
5 11 (13.92%) Java Developer
6 7 (8.86%) Senior Software Engineer
6 7 (8.86%) Software Engineer
7 4 (5.06%) Android Engineer
8 3 (3.80%) Java Engineer
8 3 (3.80%) Python Engineer
9 2 (2.53%) Applications Engineer
9 2 (2.53%) Backend Developer
9 2 (2.53%) Data Engineer
9 2 (2.53%) Engineering Manager
9 2 (2.53%) Head of Engineering
9 2 (2.53%) iOS Android Developer
9 2 (2.53%) iOS Developer
9 2 (2.53%) Python Developer
9 2 (2.53%) Senior Backend Developer
9 2 (2.53%) Senior Java Developer
Libraries, Frameworks & Software Standards
1 10 (12.66%) RESTful
1 10 (12.66%) RxJava
2 9 (11.39%) Kafka
2 9 (11.39%) Spring
3 8 (10.13%) Dagger
3 8 (10.13%) GraphQL
3 8 (10.13%) REST
4 7 (8.86%) Spring Boot
5 6 (7.59%) Node.js
6 5 (6.33%) Handlebars
6 5 (6.33%) Retrofit
7 4 (5.06%) JSON
7 4 (5.06%) Preactjs
7 4 (5.06%) Sass
7 4 (5.06%) VCL
7 4 (5.06%) WebSockets
8 3 (3.80%) Android SDK
8 3 (3.80%) React
9 2 (2.53%) Pandas
9 2 (2.53%) Protocol Buffers
Miscellaneous
1 12 (15.19%) Mobile App
2 11 (13.92%) User Experience
3 8 (10.13%) Greenfield Project
4 3 (3.80%) Data Protection Act
5 1 (1.27%) Analytical Skills
5 1 (1.27%) Self-Motivation
5 1 (1.27%) Video on Demand
Operating Systems
1 41 (51.90%) Android
2 8 (10.13%) Apple iOS
3 5 (6.33%) Linux
Processes & Methodologies
1 36 (45.57%) Android Development
2 32 (40.51%) Agile Software Development
3 23 (29.11%) Microservices
4 19 (24.05%) TDD
5 18 (22.78%) Software Engineering
6 14 (17.72%) Computer Science
7 12 (15.19%) Mathematics
7 12 (15.19%) Scrum
8 10 (12.66%) Fintech
9 9 (11.39%) Software Delivery
10 8 (10.13%) E-Commerce
10 8 (10.13%) Pair Programming
11 7 (8.86%) Mentoring
11 7 (8.86%) Project Management
12 6 (7.59%) Coaching
12 6 (7.59%) MVVM
13 5 (6.33%) Test Automation
13 5 (6.33%) Use Case
14 4 (5.06%) Continuous Integration
14 4 (5.06%) Web Development
Programming Languages
1 65 (82.28%) Java
2 14 (17.72%) Scala
3 12 (15.19%) Python
4 8 (10.13%) Clojure
4 8 (10.13%) JavaScript
5 7 (8.86%) Go
6 5 (6.33%) Apple Swift
7 3 (3.80%) SQL
7 3 (3.80%) TypeScript
8 2 (2.53%) Bash Shell
8 2 (2.53%) Java 8
9 1 (1.27%) C#
9 1 (1.27%) ClojureScript
9 1 (1.27%) Haskell
Qualifications
1 14 (17.72%) Degree
2 2 (2.53%) Computer Science Degree
Quality Assurance & Compliance
1 2 (2.53%) QA
System Software
1 13 (16.46%) Docker
Systems Management
1 17 (21.52%) Kubernetes
2 8 (10.13%) Grafana
3 4 (5.06%) Graphite
3 4 (5.06%) Prometheus
4 3 (3.80%) Marathon
4 3 (3.80%) Mesos
5 2 (2.53%) Kibana
6 1 (1.27%) Ansible
6 1 (1.27%) Consul
6 1 (1.27%) Terraform
Vendors
1 7 (8.86%) Google
2 5 (6.33%) Splunk
3 3 (3.80%) Oracle
4 1 (1.27%) Bloomberg
4 1 (1.27%) Perforce
4 1 (1.27%) Reuters