Marko Vitas

Marko Vitas

Zagreb, Croatia
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Marko Vitas

Marko Vitas

Zagreb, Croatia
Member since December 20, 2014
As a software engineer and a mobile enthusiast, Marko has invested time and resources into perfecting the development process of building mobile apps. With experience in building products iteratively, he has developed analytical skills, wireframing and prototyping techniques, and coding best practices to develop quality software and, more importantly, the software that the client really wants. Android is his playground of choice. Teamwork++
Marko is now available for hire
Portfolio
Experience
  • Java, 7 years
  • Git, 5 years
  • Google Analytics, 4 years
  • Git flow, 4 years
  • Android, 4 years
  • Android Studio, 3 years
  • Parse Android SDK, 2 years
  • Jenkins, 1 year
Zagreb, Croatia
Availability
Part-time
Preferred Environment
Android, Android Studio, Java, Git
The most amazing...
...piece of software I have made was a set of mobile banking products, which pushed my limits in creating quality, secure, and testable code.
Employment
  • CEO
    StyleReply
    2016 - 2017
    • Built a digital platform that connects fashion stylists and clients remotely through video conferencing.
    • Provided fast prototyping and web development to validate the product, along with customer validation.
    • Conducted market research and created financial models for company growth predictions.
    • Marketed on social media.
    • Founded the company.
    • Led a team of people.
    • Invested my own money and resources in building the product.
    • Operated a lean startup with an iterative approach.
    • JTBD.
    Technologies: Android, Web Prototyping (webflow)
  • Lead Android Developer
    Android Startup
    2015 - 2016
    • Built an Android app for deep analysis of mobile carrier network status. The app develops in-depth understanding of the carrier's important data collection across different versions of the Android platform, collects network status info when network changes occur, and collects and stores data locally to upload when a wifi connection is available.
    • Created smart retry mechanisms to upload data in chunks in case the network wasn't available for a longer period of time and a significant amount of data has been collected in the meantime.
    • Created dynamic wizards to navigate the user through a network troubleshooting process. The wizard accommodates a flexible data structure that can work regardless of language and adapts the wizard component for different markets and language requirements.
    Technologies: Android
  • Lead Android Developer
    Carboncash (via Toptal)
    2015 - 2015
    • Built the Android CarbonCash app, which helps you track your energy consumption over time, from scratch. The app offers a loyalty program to reward the user for thoughtful energy consumption. Keep the Earth green.
    • Built interactive charts to display and filter energy consumption data across time and through different energy criteria.
    • Worked closely with the back-end team to define a strong mobile API which was used for both the Android and later on the iOS app.
    • Contributed to the API specification and set up API testing for easy tracking of back-end status and early discovery of problems.
    Technologies: Android
  • Lead Android Engineer
    Educational Quiz Game (via Toptal)
    2015 - 2015
    • Joined the development team and set up the development culture (code reviews, Git flow, naming conventions).
    • Brought the product to the alpha and user testing stage together with the team.
    • Solved issues with the Android lifecycle.
    • Refactored the app's MVP architecture for easier testability and decoupling.
    • Helped develop a better quiz engine and abstracted the whole game flow in order to clearly specify the game mechanics/building blocks.
    • Implemented an additional app feature based on a layer messaging platform for rich in-app messaging.
    • Contributed to the product feature development.
    • Suggested UI/UX improvements which were adopted.
    • Set up a pilot project for phase two with a complex Android architecture with four in-app modules, including a pure Java module for business logic. This module can be cross compiled to Objective-C for the iOS app version.
    Technologies: Android, Git, MVP, Java
  • Senior Android Developer
    Infinum
    2012 - 2015
    • Built a set of mobile banking products with emphasis on security (mobile token integration), testability (Robotium, Robolectric), and code reusability. Focused on continuous integration and understanding the importance of it from experience.
    • Outsourced to an international company working on their Android product (5M daily sessions at the time). Gained experience setting up analytics tracking funnels and AB testing.
    • Developed games for Android, specifically Samsung Stylus-Pen devices.
    • Gained experience handling small teams.
    • Collaborated closely with designers on defining guidelines and best practices for optimizing developer-designer interactions.
    Technologies: Android
Experience
  • Two of the Largest Banks in the Croatian, Serbian and Slovenian markets | Native App (Development)

    * Implemented mobile banking systems with a focus on data security
    * Integrated mobile tokens (Asseco & Entrust tokens)
    * Gained experience with both SOAP-based web services and REST APIs
    * Implemented MVP architecture on Android
    * Used dependency injection with Dagger for easy configuration switching between tests and production code. Motivation: having a central config module where parts of the architectures can be switched with minimal effort
    * Conducted acceptance/regression testing with Robotium. Ran tests in parallel with Spoon
    * Conducted unit tests with Robolectric
    * Created mockups of test data with Mockito and MockWebServer
    * Set up Jenkins ontinuous integration server with both GitHub and Bitbucket hooks

  • MojVip (Development)
    https://play.google.com/store/apps/details?id=hr.infinum.mojvip

    * Implemented MojVip (Vip telecommunications network) application, which makes the process of checking your current account balance fast and easy. It enables you to check your current balance, remaining free minutes, and past receipts; buy surf mobile packages; change roaming status; and much more.
    * Handles auto-login if you are using the Vip network and are on mobile data connection. Requires authentication over wifi.

  • One of the Largest Global Classifieds Services (Development)

    * Developed the Android client which operates as a national online classifieds marketplace for used goods, globally active in 100+ countries.
    * Defined funnels and implemented analytics
    * AB testing
    * Participated in the process of creating Android OS images with embedded app to sell on new phones on the eastern markets
    * Worked on the project as part of a distributed team. Experienced in working with time difference (better planning)

  • Pen Adventures (Development)
    https://www.infinum.co/case/pen-adventures

    * Mobile Android game for Samsung Stylus Pen devices where the goal is to navigate the little fish to the end of the level, squeezing through tight obstacles and evading enemies.
    * The focus of the development process was on the creativeness, research, and close work with an illustrator. It was really fun.

  • HAK (Development)
    https://play.google.com/store/apps/details?id=com.infinum.hak

    * Worked on the app for the Croatian auto club

  • Wireframing and Prototyping (Other amazing things)

    * Experienced in the usage of Balsamiq wireframing tool for quick iterations in defining the client's feature set and design needs
    * Experienced in the usage of InVision prototyping tool for setting up real life app prototypes with screen designs

  • Android Talks (Other amazing things)
    https://www.infinum.co/android-talks

    Started an in-house education meetup for exchanging experience from past and current projects. The talks were filmed and broadcast on YouTube and are available at the provided link. Android Talks are regularly featured in Android Weekly, a free newsletter that helps you to stay cutting-edge with your Android development.

  • One of the largest german banks present on the Croatian market - hybrid app (Development)

    * Hybrid app: created the native Android wrapper for the bank mobile web application.

  • Blog Entries Tech (Other amazing things)
  • Blog Entries Travels, Startups, Life (Other amazing things)
    https://surfon.life

    Writing about my travels, psychology topics and my experience in being part of the startup community.

  • Android Testing Tutorial: Unit Testing like a True Green Droid (Publication)
    The extremely diverse and fragmented Android ecosystem poses certain challenges when it comes to testing. In this article, we take a look at some approaches that can be effective with tackling these challenges and ease the process of writing and automating tests.
Skills
  • Libraries/APIs
    Retrofit, Butter Knife, Layer API, Parse Android SDK, DBFlow
  • Tools
    Balsamiq Mockups, Eclipse, Google Analytics, Jenkins, InVision, Gradle, Android Studio, Git flow, Git, Trello, Sketch
  • Platforms
    Android
  • Misc
    Mobile UX, Mobile Apps, Mobile UI, Financial Modeling, Market Research & Analysis, Writing, Online Marketing, Prototyping, JTBD, Social Media Marketing, SOAP, Business Development, Software Project Management, Project Management, Sales, Social Media Strategy, Startups, Gamification
  • Languages
    Java, Groovy, Python
  • Frameworks
    Dagger, Robotium, Robolectric
  • Paradigms
    Lean Startups, Agile Software Development, REST
Education
  • Software Engineering and Information Systems degree in Computer science
    Mälardalen University - Västerås, Sweden
    2011 - 2012
  • Software Engineering and Information Systems degree in Computer science
    Faculty of Electrical Engineering and Computing - Zagreb, Croatia
    2006 - 2012
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