Want to hire this engineer?
Check if Kostiantyn is availableExpertise
Years of commercial development experience
6 years of experience
Core technologies
Other technologies
Project Highlights
DeHealth
Apr `24 - Dec `24
8 months
https://www.dehealth.world/
DeHealth connects individuals, healthcare providers, and data consumers in a secure and mutually beneficial partnership, enabling a win-win data exchange of high-quality, multi-structured datasets.
Responsibilities & achievements
- Code review and bug fixing; - Joined the app development in progress; - Developed a big part of the app; - Integrated calendar API with Paging 3 library to use calendar month and year for loading pages; - Implemented plenty of custom value pickers for various measurement units.
Media keyboard app
Oct `23 - Mar `24
5 months
https://play.google.com/store/apps/details?id=tech.empat.memeboard&hl=en
MemeBoard App is a creative and fun application designed for meme enthusiasts. It allows users to easily create, customize, and share memes with friends or on social media.
Responsibilities & achievements
- Built a custom keyboard that can switch to a media picker with a search bar to easily find and paste content to messaging apps; - Implemented a settings screen to adjust keyboard behaviour.
Entrata
Jun `23 - Nov `23
5 months
https://www.entrata.com/
The short pitch is that it’s an app for Students that will help them plan for their future and protect the things they love.
Responsibilities & achievements
- built front-end components library using Dagger and Retrofit; - debugged and resolved the application issues; - wrote unit, integration and e2e tests; - integrated with different providers.
House rental app
Jun `23 - Oct `23
4 months
https://play.google.com/store/apps/details?id=com.homebody&hl=en
Homebody App is a social platform designed for people who prefer staying in over going out. It focuses on connecting like-minded individuals who enjoy hosting or attending cozy, home-centered gatherings.
Responsibilities & achievements
- Built an app from scratch in a group of 4 Android developers; - Actively participated in app architecture and technical solutions discussions; - Implemented plenty of pluggable complex UI components to use across all apps; - Implemented cross-login with another app from the client; - Covered my scope of work with unit tests.
Contendi
Jul `22 - May `23
10 months
https://contendi.it/
his is a specialized fund that focuses on litigation funding, specifically in financing disputes. With Contendi, individuals can pursue legal action without being burdened by the expenses associated with litigation, as Contendi covers those costs. The mobile application was built to create class actions and apply for them, track their statuses, join private and public group video sessions and chats on the progress of class actions, and manage your applications.
Responsibilities & achievements
- Built an app from scratch, using MVVM architecture; - Implemented whole UI and navigation with Compose, including some custom views via AndroidView; - Integrated third-party services for voice/video calls and chats.
E-book and audiobook reader
Mar `22 - Oct `22
7 months
https://www.allyoucanbooks.com/
All You Can Books is a subscription-based service offering unlimited access to a vast library of audiobooks, eBooks, podcasts, and language courses. It caters to avid readers and learners, providing resources across a wide range of genres and topics.
Responsibilities & achievements
- Upgraded the existing app from API level 24 to 33 to meet Play Store requirements; - Updated app notifications and services according to requirements and restrictions that were added since the previous release; - Added the library to the project as a separate module and rewrote its source code to avoid massive refactoring of the application since the library has been unsupported for several years; - Fixed various bugs and performance issues.
Educational social network for studying and communications
Jan `20 - Mar `22
2 years
NDA
Application for education which allows you to create your own course in the step-by-step constructor and community around them, buy any course and study with community.
Responsibilities & achievements
- Built an app from scratch, using MVVM architecture; - Actively participated in app feature design; - Implemented Jetpack Compose UI, including Material 3 components with dynamic colors; - Integrated third party services for voice calls, chats, storage and payments; - Used Kotlin, Coroutines, Flow, Navigation Component, Jetpack Compose, Koin, Firebase (Firestore, Messaging, Crashlytics, Dynamic Links), Agora Voice SDK, AWS Amplify.
Education
Higher education in Computer Science
Agency
50-100
GMT+2
Kyiv/Ukraine, Ivano-Frankivsk/Ukraine, Lviv/Ukraine, Ternopil/Ukraine, Khmelnyck/Ukraine, Warsaw/Poland, Paris/France, Berlin/Germany
Core Expertise
Industries
Education & Science, E-Commerce & Retail, Banking & Finance, Social Media & Communication, Healthcare & Medicine, Branding, design, web development
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Check if Kostiantyn is available