Ivan Markusi

I implemented various features rolled out as experiments, the Discover Tab being one of the major ones, with some of them becoming globally available.
I applied the TDD development process with high code coverage percentage working in a large multi-module app.

I've worked on multiple customized app-commerce mobile apps using the client's app-commerce platform in the form of several SDKs.

The work consisted of either setting up new clients and implementing bespoke features or bug fixing and implementing new features for existing clients.

I've had the opportunity to advise the external system integrators' team on how to use the platform, practices to follow, and code of conduct analysis of the mobile project.

Part of the work was migrating the codebase from Java to Kotlin and migrating dependency injection from Dagger2 to Koin.

Assuming a consultant role, I've also improved the onboarding process, the way new projects are set up, and various features of the CI/CD solution.

The REWE's digital scrapbook for postponed Euro 2020 championship.

I was part of a small mobile team, implementing and supporting the app while the promotion was active.

The app had a heavily customized UI with emphasis on smooth transitions and custom animations.

The app supported scanning scrapbook cards via image and text recognition: Image recognition was implemented using TensorFlow and text recognition used the Firebase ML kit.

The largest regional classified ads platform, with 500,000+ installs on the Play Store.

I was a part of a dedicated Android team, working in an agile environment.

The app was initially a WebView wrapper. The team and I started to implement the app feature by feature using the Android SDK.

I’ve introduced Kotlin, static code quality checks, continuous integration and MVVM pattern to the codebase.

The challenging part was working with legacy code, which we surrounded with black box tests and refactored bit by bit until the majority of the code was covered with unit tests.

By being a part of a dedicated team, I’ve collaborated with designers about the UX of the app.

Also, I’ve designed the public API of the backend services consumed by the mobile app, alongside the backend team.

Financial application for money remittance between people and for topping up or withdrawal of money from partner online and telecom accounts.

I am the lead developer of a small mobile team, which maintains the app and implements new features.

The app was initially written in Cordova since it allowed the company to quickly prototype and publish the app to both App Store and Play Store.

I led the team in rewriting the codebase to native Android and iOS.

I am developing both Android and iOS apps.

Android app is written in Kotlin, using MVVM architecture pattern (Android Architecture Components - ViewModel/LiveData) in conjunction with dependency injection (Koin) to ensure maximum testability.

Threading is done using Kotlin Coroutines.

Unit tests are done with JUnit/Mockito, while the instrumentation tests are using the Espresso framework.

The iOS app is written in Swift. It uses the MVVM architecture pattern and reactive approach (RxSwift).

Unit tests are written using Quick/Nimble frameworks. In addition to the unit, the app also has a suite of snapshot tests.

Both apps are hosted on a GitLab repository and use GitLab integrated CI and CD features.

White label solution used in 10+ amusement parks across North America, with up to 200,000+ downloads each.

I’ve implemented and maintained the project in a way that a new venue could easily be deployed.

Each park’s app can be reskinned and features can be toggled either at compile time or dynamically via the backend service.

The app has an interactive guide map with a wayfinding feature, push and in-app notifications.

Beacons in the park are detected using Bluetooth LE and user position is monitored using the beacons, GPS tracking, and geofencing.

Mobile app for one of Slovenians largest banks, with 100.000+ installs on the Play Store.

I’ve rewritten the app from scratch since the codebase had a number of WebView wrappers, no structure and it was not feasible to implement landscape support before the deadline.

The app works in both portrait and landscape mode, on various screen sizes and formats, uses MVP pattern and dependency injection, while the data flow is implemented using Reactive Programming paradigm.

A lot of effort was put in the security and testability of the app, taken into account the core business of the client.

All users' private data, such as tokens is stored into secure enclaves on the device. All user interaction is monitored in the app.

The user is automatically logged out for inactivity.

Code is obfuscated and no compromising data is kept in the app, nor in the repository where the app’s code is.

Greenfield project for one of the largest European mobile network operators.

The app is a white label solution for network operator customers. It is engineered in a way that the client can deploy the app to different countries by rebranding and changing the configuration.

I’ve worked on functional specification and requirements documentation for the mobile app in the pre-development stage.

During the development phase, I developed and coordinated the backend and mobile teams.

I’ve developed the same features on both Android and iOS, having an excellent opportunity to compare the frameworks and tackle the challenges in a platform-agnostic way.

App for tracking the menstrual cycle, with 100,000+ installs on the Play Store.

I’ve ported one of the most downloaded apps on the App Store to Android.

The app has a unique design, a lot of custom views and uncommon Android navigation gestures.

The app has an offline-first UX, syncing data from the database (DBFlow/SQLite) to the remote API (OkHttp/Retrofit) in the background.

I’ve implemented “infinite”-scrolling mechanism for the calendar and simple graph drawing on Canvas.

An app for a startup aimed towards developing a SaaS for managing finances, employees, inventory and pretty much everything a beauty salon owner would need.

Salon employers can schedule appointments, view the customer’s history, sell various products and issue invoices.

I’ve developed the app and established data models for the admin interface on the web and the mobile app, as a part of the technical documentation.

The app is optimized for iPad in landscape mode.

It uses Bluetooth LE to communicate with the ENV terminal (part of the SumUp SDK), which is used for processing payments.

A simple companion app for monitoring the power consumption of the household made for a German startup.

Wrote project specification, implemented the project requirements and onboarded in-house developers to the codebase.

I’ve implemented complex graphs which display the power consumption over time.