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Stelios Papamichail

Android Engineer

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About Me

Goal driven Android app developer with excellent communication and teamwork skills. Strong technical knowledge of the Android platform & Kotlin, with five years of experience in building, integrating, testing, and supporting Android & Flutter applications for mobile devices on the Android platform.

Latest Projects


ArtVolt

ArtVolt - Save, store & share your favorite artworks

ArtVolt is the app for saving, storing and sharing your favourite art and design memories. With one click, you will seamlessly capture the image and all relevant details of the artwork’s information in our secured cloud-based system. By saving works, you can create your own digital diary of the art you discover. Whether at an art fair or a gallery, we’re here to save the memory for you.

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Just Play

Just Play MVP - A pickup soccer app for passionate soccer players

Just Play aims to make playing a great sports game hassle free by making the process of finding other passionate players and fields as easy as going to a gym!

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Dokkan Cards - A side-tool application for your favorite game

Dokkan Cards is an application that was created for the community of Dragon Ball Z Dokkan Battle with the sole purpose to assist the community's members in learning more about the in-game cards,events etc. The app allows you to find any info about a card with just one tap of your finger.

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Nesoi Notes - Minimal note taking app

A clean and minimal note taking app that allows you to add, update and delete notes while laying them out based on their priority and date.

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Freelance Projects

ArtVolt - Save, store & share your favorite artworks Upwork

ArtVolt is the app for saving, storing and sharing your favourite art and design memories. With one click, you will seamlessly capture the image and all relevant details of the artwork’s information in our secured cloud-based system. By saving works, you can create your own digital diary of the art you discover. Whether at an art fair or a gallery, we’re here to save the memory for you.

View on Upwork

Just Play MVP - A pickup soccer app for passionate soccer players Upwork

Just Play aims to make playing a great sports game hassle free by making the process of finding other passionate players and fields as easy as going to a gym!

View on Upwork

Syros Guide - A tourist guide for the island of syros Fiverr

A tourist guide for the island of syros

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Hydra Guide - A tourist guide for the island of hydra Fiverr

A tourist guide for the island of hydra

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More on Upwork

Work Experience

Android Engineer - Threenitas (Feb 2022 - Present)

— Helped develop the android applications for various clients such as Aegean Airlines, 24Media and more
— Led the architecture implementation for the apps of D.E.I. and Eway and helped drive them from ideas to production
— Took the initiative of implementing the transfer of our proprietary location services SDK using Azure CI/CD to a different organization (without information leakage) for the first time in our company
— Followed clean-code best practices while working with an excellent team in an agile environment during development phases, in order to write scalable and maintainable code

Tech stack: Jira, Azure DevOps, Git, Kotlin Coroutines, Jetpack Compose & XML, Dependency Injection using Koin, JUnit & Mockk for unit testing, MVVM & clean architecture and Confluence for process documentation.

Android Engineer - Threenitas (Mar 2021 - Sep 2021)

Working in an agile team using the latest stable Android tech stack while developing apps for big tech companies around the globe. Responsibilities include:

  • Reading & Writing documentation
  • Evaluating product requirements and writing technical analysis documents to describe how to meet those requirements
  • Developing client apps for Android using proper architectural patterns & best practices
  • Analysis & implementation of Huawei Mobile Services in a GMS first project
  • General Lead developer responsibilities
  • Use of agile software
  • Git
  • Writing automation pipelines using Azure Devops to automate the building and testing processes
  • Writing Unit Tests & UI Tests using JUnit and Espresso respectfully

Appsheet Application Developer - Sonorus Consulting Ltd (May 2020 - October 2020)

Responsible for the development & maintenance of business applications using Appsheet, Airtable, Integromat and more. Responsibilities included:

  • Database design & development based on customer needs
  • Integration & normalization of data into the Appsheet platform
  • Communicating with clients on a regular basis to asses the business' needs
  • Working in an Agile Development team
  • SQL
  • UI/UX Design
  • Use of REST APIs
  • JavaScript

Android & Flutter Developer - Freelance (2019 - Present)

  • Developed multiple apps on Google Play
  • Experienced in working with numerous SDKs such as the Android SDK, Firebase SDK & AuthUI SDK, Admob & AdColony SDKs, and many others.
  • Experienced in using a variety of third-party libraries such as Glide, Gson, Picasso, Room & many more
  • Developed an application with over 50K downloads & created a sustainable revenue stream using Ad monetization
  • Experienced in developing apps using the MVVM architecture