Freelance Kotlin jobs

33 live freelance, contract and interim Kotlin roles, collected daily from recruitment-agency desks around the world — the postings that rarely make it to the big job boards.

33 live33 freelance7 remote
Quality Assurance Automation Tester Berlin
Freelance🇩🇪 Germany📍 BerlinJavaKotlinGroovyJavaScript
Quality Assurance · Automation Tester
Freelanceonsite🇩🇪 Germany📍 Berlin⏱ 3 months + extensionJavaKotlinGroovyJavaScript
Senior Android Developer
Freelancehybrid🇵🇱 Poland📍 Warsaw, Poland⏱ > 12 monthsKotlinJavaAndroid SDKREST API
Senior Android Developer
Freelancehybrid🇵🇱 Poland📍 Warsaw, Poland⏱ > 12 monthsAndroidKotlinJetpack ComposeGitHub Actions
Senior Kotlin Multiplatform Developer (KMP)
Freelancehybrid🇵🇱 Poland📍 Warsaw, Poland⏱ > 12 monthsKotlinKotlin MultiplatformJetpack ComposeCoroutines
Android Engineer
Freelance🇸🇪 Sweden📍 Stockholm, Stockholms län, Swedenkotlinandroid architecturejetpack composekotlin multiplatform
Fullstack Developer (Java/React)
Freelanceremote🇵🇱 Poland📍 Poland⏱ 12 monthsJavaKotlinSpring BootReact
Android Developer
Freelancehybrid🇬🇧 United Kingdom📍 London⏱ 1 yearKotlinAndroid StudioMVVMCI/CD
Software Engineer Mbos Stuttgart
Freelanceonsite🇩🇪 Germany📍 StuttgartKotlinJavaSpring BootVue.js
Mobile Engineer with UI experience
Freelanceonsite🇫🇮 Finland📍 Helsinki, Finland⏱ 4-6 monthsSwiftKotlinUIKitJetpack Compose
Principal Back End Engineer Must Kotlin Spring Boot
Freelancehybrid🇲🇽 Mexico📍 Mexico CityKotlinSpring BootTemporalPostgreSQL
Senior Android Developer (Swedish-speaking)
Freelancehybrid🇸🇪 Sweden📍 Stockholm Metropolitan Area, Sweden⏱ 6 months + extensionAndroidJavaKotlinRESTful APIs
Senior Android developer
Freelancehybrid🇫🇮 Finland📍 Helsinki, Finland⏱ 4-6 months + extensionKotlinJetpack ComposeEspressoMaterial Design
Senior Android Developer
Freelancehybrid🇵🇹 Portugal📍 Lisbon, Portugal⏱ > 12 monthsKotlinJetpack ComposeFirebaseRoom
Développeur Androïd/KMP Senior
Freelancehybrid🇫🇷 France📍 Lyon, France⏱ 7-9 monthsKotlinJetpack ComposeKMPAndroid Studio
Développeur Mobile Android KMP Montpellier
Freelancehybrid🇫🇷 France📍 Montpellier⏱ 6 months + extensionKotlin Multiplateform (KMP)
Fullstack Engineer (Java&Kotlin + JavaScript)
Freelanceremote🇵🇱 Poland📍 Remote jobJavaKotlinJavaScriptTypeScript
Software Engineer (Kotlin&Java)
Freelanceremote🇵🇱 Poland📍 Remote jobKotlinJavaSpring BootMongoDB
Software Engineer Android Automotive Aosp Ottawa
Freelancehybrid🇨🇦 Canada📍 Ottawa⏱ 12 monthsC++JavaKotlinAndroid
Automation Tester
Freelance🇬🇧 United Kingdom📍 Burgess Hill, England, United Kingdomjavakotlinautomation testingquality assurance
Senior Data Engineer
Freelanceremote🇵🇱 Poland📍 Remote jobPythonJavaKotlinScala
Senior Fullstack Engineer (Java&Kotlin + JavaScript)
Freelanceremote🇵🇱 Poland📍 Remote jobJavaKotlinJavaScriptTypeScript
Fullstack Engineer (Java&Kotlin + JavaScript)
Freelanceremote🇵🇱 Poland📍 Remote jobJavaKotlinJavaScriptReact
Java Lead Engineer
Freelance🇬🇧 United Kingdom📍 Sheffield, England, United Kingdomkotlinjavamicroservicesrest apis
Android Developer (3-Months Contractual)
Freelanceremote🇵🇰 Pakistan📍 Pakistan⏱ 3 monthsAndroidKotlinAndroid StudioGradle
Senior Androidutvecklare
Freelance🇸🇪 Sweden📍 Malmö, Skåne län, Swedenandroidkotlincomposeapputveckling
Android Developer
Freelanceonsite🇵🇹 Portugal📍 Leiria, Portugal⏱ > 12 monthsAndroidJavaKotlinJetpack Compose
Android Developer with Java Backend Experience
Freelancehybrid🇵🇱 Poland📍 Warsaw, Poland⏱ Permanent PositionKotlinJetpack ComposeAndroid SDKJava
Android Developer + Kotlin Multiplatform
Freelancehybrid🇵🇱 Poland📍 Warsaw, Poland⏱ 10-12 monthsKotlinJetpack ComposeKotlin MultiplatformCompose Multiplatform
Embedded Android Engineer
Freelance🇸🇪 Sweden📍 Stockholm, Stockholms län, Swedenembedded systemslinuxandroidkotlin
Consultant Task – Kotlin/Java Full Stack Application Developers (4 positions) (25 June 2026)
Freelancehybrid🇫🇮 Finland📍 Finland⏱ 12 monthsKotlinJavaSpring BootReact
Android Reverse Engineer
Freelance🇺🇸 United States📍 United States of AmericaJadxGhidraFridaIDA Pro
Senior Reverse Engineer
Freelance🇺🇸 United States📍 United States of AmericaJadxGhidraFridaIDA Pro
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