Profileimage by Jani Tarkiainen Android & full-stack web developer from ChiangMai

Jani Tarkiainen

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Last update: 22.04.2025

Android & full-stack web developer

Graduation: Bachelor's degree in software engineering
Hourly-/Daily rates: show
Languages: Finnish (Native or Bilingual) | English (Full Professional)

Attachments

resume-jani-tarkiainen_220425.pdf

Skills

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 has been spent 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

Project history

09/2020 - 02/2025
CTO & Lead developer & Co-Founder
Gaasly (Marketing, PR and Design, < 10 employees)

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.

09/2019 - 12/2023
CTO & lead developer & co-founder
Voizy (Internet and Information Technology, < 10 employees)

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

02/2020 - 05/2020
Android developer consultant
DNA (Telecommunications, 1000-5000 employees)

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

06/2015 - 09/2019
Android developer consultant
DNA (Telecommunications, 1000-5000 employees)

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

Local Availability

Only available for remote work
Profileimage by Jani Tarkiainen Android & full-stack web developer from ChiangMai Android & full-stack web developer
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