01/20/2026 updated

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Android & Full-Stack web developer

Chiang Mai, Thailand Bachelor's degree in software engineering
Chiang Mai, Thailand Bachelor's degree in software engineering

Profile attachments

cv-janitarkiainen-2025-07.pdf

I am a software developer with 12 years of experience in startup and enterprise environments, focusing on native Android and full-stack web development. I've successfully delivered products independently in fast-paced settings as well as thrived in team collaborations in bigger cross-functional teams. Most of my career I have been working remotely, consistently delivering high-quality results with minimal supervision while maintaining close collaboration.


Main expertise 
  • Android development - 8 years
  • Android SDK - 8 years
    Java - 7 years
  • Kotlin - 4 years
  • ReactiveStreams - 5 years
  • REST APIs - 12 years
  • Databases - 12 years
  • Typescript - 4 years
  • React - 4 years
  • Redux - 2 years
  • Python - 4 years
  • Django - 4 years

Languages

FinnishNative speakerEnglishFluent

Project history

CTO & Lead developer & Co-Founder

Gaasly

Marketing, PR and design

< 10 team member

Designed and developed an internal ERP system as the sole developer, in remote working setup. The system enabled Gaasly to manage time tracking, invoicing, contract handling, and business analytics. Took full ownership of the product from backend to frontend, architecture, implementation and deployment.

Technologies & Tools:
React, Redux, TypeScript, Python, Django, Docker, AWS, Stripe.

CTO & lead developer & co-founder

Voizy

Internet & IT

< 10 team member

Voizy audio memes platform

Built and launched a native Android app for creating and sharing audio memes and published on Google Play Store. As the sole developer, I was responsible for the entire development process, including app architecture, development, testing, backend integration, and deployment.Built and launched a native Android app for creating and sharing audio memes and published on Google Play Store. As the sole developer, I was responsible for the entire development process, including app architecture, development, testing, backend integration, and deployment.

Skills: Android Development · Kotlin · RxJava · Firebase · Google Cloud Platform (GCP) · Elasticsearch

Android developer consultant

DNA

Telecommunications

1000-5000 team member

DNA TV Hubi

Key Android developer on an Android-based set-top box solution for DNA, one of Finland’s leading telecom companies. As the longest-serving Android developer on the project, I played a major role from early development to launch. The product featured live TV, video-on-demand, and recording capabilities. Initially working on-site, I later continued remotely while closely collaborating with on-site developers, backend team, and hardware manufacturers to ensure seamless integration and a high-quality user experience.

Techs & Tools: Android SDK, Java, Kotlin, RxJava2, Koin Dependency injections, Retrofit, SQLite, Room, JUnit, Mockito

Android developer consultant

DNA

Telecommunications

1000-5000 team member

DNA TV Hubi
Key Android developer on an Android-based set-top box solution for DNA, one of Finland’s leading telecom companies. As the longest-serving Android developer on the project, I played a major role from early development to launch. The product featured live TV, video-on-demand, and recording capabilities. Initially working on-site, I later continued remotely while closely collaborating with on-site developers, backend team, and hardware manufacturers to ensure seamless integration and a high-quality user experience.

Skills: Android SDK, Java, Kotlin, RxJava, Koin Dependency injections, Retrofit, SQLite, Room, JUnit, Mockito

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