[Annual Salary 9.51 Million Yen] Kotlin Engineer Jobs April 2026 Latest | Freelance Survey [Researched by Freelance Board]
Freelance Board has released a survey report on Kotlin engineer jobs as of April 2026. The average annual salary for Kotlin projects is 9.51 million yen, with a high remote work ratio of 88.9%, accounting for 2.62% of the total market. Demand remains stable, especially in Android app development, maintaining high compensation.
📋 Article Processing Timeline
- 📰 Published: April 23, 2026 at 01:30
- 🔍 Collected: April 23, 2026 at 00:02
- 🤖 AI Analyzed: April 23, 2026 at 04:41 (4h 39m after Collected)
We are pleased to announce the latest survey report on freelance Kotlin engineer jobs for 2026.
This report was compiled from 13,242 actual freelance projects listed on Freelance Board.
■ Survey Summary
・Average annual salary for Kotlin projects: 9.51 million yen
・Remote projects: 88.9%
・Kotlin projects' market share: 2.62% of the total
■ Table of Contents
Kotlin project average annual salary ranking: 7th (9.51 million yen)
Kotlin project count ranking: 9th (project ratio 2.62%)
Remote work ratio for Kotlin projects
Industries with many Kotlin projects
Job types for Kotlin projects
Characteristics of Kotlin
What can be built with Kotlin
Market value of Kotlin skills
Survey Target
Assumed annual income is calculated from the average monthly unit price of Kotlin job postings on Freelance Board (https://freelance-board.com/jobs/skills-12).
・Target Period
February 1, 2024 to April 22, 2026
・Number of Target Projects:
13,242 projects
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When publishing in media, please add the following source:
Source: Freelance Board (https://freelance-board.com/jobs/skills-12)
Kotlin project average annual salary ranking: 7th (9.51 million yen)
The average monthly unit price for Kotlin projects is 792,000 yen, and the average annual salary is 9.51 million yen, placing it 7th in the programming language annual salary ranking.
Kotlin is a statically typed language developed by JetBrains, characterized by its high compatibility with Java, concise syntax, and null safety. It runs on the JVM and achieves performance equivalent to Java after compilation, making it widely adopted as the official language for Android app development.
Industrially, it is utilized in a wide range of areas such as mobile apps, web services, and backend development, and is highly valued particularly in Android app development and server-side development.
Unit prices remain high, and with Google's official support and multi-platform compatibility, stable demand is expected in the future.
Kotlin project count ranking: 9th (project ratio 2.62%)
As of April 2026, Kotlin projects account for 2.62% of the total market, ranking 9th in project count, and maintaining a high average monthly unit price of 792,000 yen.
Kotlin is a concise and safe language, and since its adoption as the official language for Android app development, it has been utilized in a wide range of areas such as mobile and web services. Its compatibility with Java and null safety are strengths, leading to strong demand in development environments leveraging existing Java assets.
In recent years, demand for server-side development and cross-platform development has also expanded. Combining practical experience in Kotlin with peripheral skills such as Android SDK and Jetpack Compose can lead to securing high-paying projects.
Remote work ratio for Kotlin projects
(Reference: https://freelance-board.com/jobs/skills-12)
As of April 2026, the remote work ratio for freelance Kotlin projects and job postings is 31.6% for full remote, 57.3% for partial remote, and 11.1% for on-site.
Combining full remote and partial remote reaches 88.9%, indicating that remote-inclusive working styles are mainstream.
Month-over-month, full remote increased by 0.1% while partial remote decreased by 0.3%. Kotlin is primarily used for Android app development and server-side development, which have high affinity for individual work, thus maintaining a stable remote work ratio.
Year-over-year, full remote increased by 7.9% while partial remote decreased by 12.1% and on-site increased by 4.3%, showing some movement towards returning to the office. However, given the growth in full remote, remote-centric working styles are expected to continue for Kotlin projects.
Industries with many Kotlin projects
(Project ratio: Top 5 extracted)
(Reference: https://freelance-board.com/jobs/skills-12)
As of April 2026, Kotlin projects are most prevalent in Services at 6.86% (908 projects) ranking 1st, Web Services at 6.46% (855 projects) ranking 2nd, toC at 2.76% (366 projects) ranking 3rd, toB at 2.29% (303 projects) ranking 4th, and Telecommunications at 1.39% (184 projects) ranking 5th. The top 5 industries account for approximately 19.76% of the total.
This report was compiled from 13,242 actual freelance projects listed on Freelance Board.
■ Survey Summary
・Average annual salary for Kotlin projects: 9.51 million yen
・Remote projects: 88.9%
・Kotlin projects' market share: 2.62% of the total
■ Table of Contents
Kotlin project average annual salary ranking: 7th (9.51 million yen)
Kotlin project count ranking: 9th (project ratio 2.62%)
Remote work ratio for Kotlin projects
Industries with many Kotlin projects
Job types for Kotlin projects
Characteristics of Kotlin
What can be built with Kotlin
Market value of Kotlin skills
Survey Target
Assumed annual income is calculated from the average monthly unit price of Kotlin job postings on Freelance Board (https://freelance-board.com/jobs/skills-12).
・Target Period
February 1, 2024 to April 22, 2026
・Number of Target Projects:
13,242 projects
※Request for citing this data
When publishing in media, please add the following source:
Source: Freelance Board (https://freelance-board.com/jobs/skills-12)
Kotlin project average annual salary ranking: 7th (9.51 million yen)
The average monthly unit price for Kotlin projects is 792,000 yen, and the average annual salary is 9.51 million yen, placing it 7th in the programming language annual salary ranking.
Kotlin is a statically typed language developed by JetBrains, characterized by its high compatibility with Java, concise syntax, and null safety. It runs on the JVM and achieves performance equivalent to Java after compilation, making it widely adopted as the official language for Android app development.
Industrially, it is utilized in a wide range of areas such as mobile apps, web services, and backend development, and is highly valued particularly in Android app development and server-side development.
Unit prices remain high, and with Google's official support and multi-platform compatibility, stable demand is expected in the future.
Kotlin project count ranking: 9th (project ratio 2.62%)
As of April 2026, Kotlin projects account for 2.62% of the total market, ranking 9th in project count, and maintaining a high average monthly unit price of 792,000 yen.
Kotlin is a concise and safe language, and since its adoption as the official language for Android app development, it has been utilized in a wide range of areas such as mobile and web services. Its compatibility with Java and null safety are strengths, leading to strong demand in development environments leveraging existing Java assets.
In recent years, demand for server-side development and cross-platform development has also expanded. Combining practical experience in Kotlin with peripheral skills such as Android SDK and Jetpack Compose can lead to securing high-paying projects.
Remote work ratio for Kotlin projects
(Reference: https://freelance-board.com/jobs/skills-12)
As of April 2026, the remote work ratio for freelance Kotlin projects and job postings is 31.6% for full remote, 57.3% for partial remote, and 11.1% for on-site.
Combining full remote and partial remote reaches 88.9%, indicating that remote-inclusive working styles are mainstream.
Month-over-month, full remote increased by 0.1% while partial remote decreased by 0.3%. Kotlin is primarily used for Android app development and server-side development, which have high affinity for individual work, thus maintaining a stable remote work ratio.
Year-over-year, full remote increased by 7.9% while partial remote decreased by 12.1% and on-site increased by 4.3%, showing some movement towards returning to the office. However, given the growth in full remote, remote-centric working styles are expected to continue for Kotlin projects.
Industries with many Kotlin projects
(Project ratio: Top 5 extracted)
(Reference: https://freelance-board.com/jobs/skills-12)
As of April 2026, Kotlin projects are most prevalent in Services at 6.86% (908 projects) ranking 1st, Web Services at 6.46% (855 projects) ranking 2nd, toC at 2.76% (366 projects) ranking 3rd, toB at 2.29% (303 projects) ranking 4th, and Telecommunications at 1.39% (184 projects) ranking 5th. The top 5 industries account for approximately 19.76% of the total.