Maksym

Maksym Kalinichenko
Android Developer
Varna, Bulgaria | [открыть контакты](см. выше в блоке «контактная информация») | [открыть контакты](см. выше в блоке «контактная информация») | LinkedIn | t.me/kalinichenko_maksym
SUMMARY
Android Developer with 3 years of experience building and scaling mobile products across trading, affiliate marketing,
and digital platforms. Delivers end-to-end solutions from architecture and integrations to release support and
product iteration. Brings broad engineering exposure across frontend, backend, APIs, cloud, and real-time systems,
which helps align mobile delivery with product goals, business flows, and stable user experience.
TECH SKILLS
Programming: Kotlin, Java, Kotlin Multiplatform (KMP), JavaScript
Mobile: Android SDK, Jetpack Compose, XML, WebView, Custom Tabs
Architecture: MVVM, MVI, MVP, Clean Architecture, multi-module architecture, MVC
Dependency Injection: Dagger 2, Dagger Hilt, Koin
Async & Realtime: Coroutines, Flow, LiveData, WebSocket, Pub/Sub, OneSignal
Networking & APIs: Retrofit2, OkHttp, REST API, OAuth
Third-party Services / SDKs: Firebase Auth, Google Maps, Stripe
Storage & Databases: Room, DataStore, SharedPreferences, PostgreSQL, MySQL, Firestore
Frontend & Web: HTML5, CSS3, SCSS
Tools & Quality: Firebase, Crashlytics, Sentry, GitLab, CI/CD, Asana, Jira, ClickUp, ProGuard, R8, Unity
Leadership: Team Leadership, Mentoring, Code Review, Task Planning, Technical Decision-Making
EXPERIENCE
Android Developer | Magnise Nov 2024 – Present | Remote
Owned Android delivery for trading and investment apps as the sole Android engineer in the company.
Developed client apps from scratch and modernized the core product used for trading, onboarding, and education.
Led architecture, feature delivery, release support, and technical decisions across product and client apps.
Built 2 Android trading apps from scratch and supported post-release fixes and feature delivery for clients.
Developed an education-driven trading platform that reduced entry barriers for beginner traders.
Refactored a legacy codebase and introduced MVVM, Clean Architecture, and a multi-module structure.
Designed new apps with MVI, Clean Architecture, Kotlin, Jetpack Compose, Hilt, Coroutines, and Flow.
Integrated REST and WebSocket flows for orders, positions, rates, and transaction status updates.
Implemented reconnect, ping-pong, re-subscription, and queued event delivery for offline recovery.
Improved Android UX by adapting iOS-first designs, refining navigation, animations, and screen behavior.
Implemented OAuth-like auth via Custom Tabs, secure session handling, DataStore, Android Crypto, and R8.
Reworked a custom financial chart library from Java to Kotlin for reuse across core and client apps.

Android Developer | Wild Wild Leads Dec 2022 – Oct 2024 | Remote
Developed Android apps for affiliate marketing products in gambling, dating, and chatting domains.
Built user-facing apps for global markets to drive acquisition, retention, and conversion across partner offers.
Progressed from hands-on engineer to technical lead, combining delivery ownership with mentoring, team guidance.
Built 100+ Android apps and delivered 50+ app updates for affiliate campaigns across multiple verticals.
Developed mini-game and arcade apps with auth, web content, analytics, push flows, and in-app events.
Owned delivery end to end, from architecture and stack selection to testing, release, and post-launch support.
Applied MVVM, MVI, and MVP across single-module and multi-module apps using Kotlin and Jetpack tools.
Integrated REST APIs, Firebase, OneSignal, Facebook SDKs, and custom token and retry handling flows.
Led Unity integration on Android, then scaled the approach across products after successful adoption.
Managed a team of 5 developers, assigned tasks weekly, reviewed code, and resolved technical blockers.
Partnered with QA and design on test cases, bug triage, acceptance criteria, and market-specific UX.
Mentored 15+ Android developers and tracked delivery progress through ASANA with other tech leads.
Android Developer Mentor | united IT Jun 2023 – May 2024 | Remote
Supported junior Android developers and students in a volunteer mentorship program for entry into IT.
Helped mentees strengthen coding skills through code review, Q&A support, and practical project guidance.
Focused on code quality, architecture basics, and production-minded development practices.
Mentored up to 5 junior Android developers and students without commercial Android experience.
Reviewed code, answered technical questions, and helped mentees shape pet projects for job readiness.
Guided mentees in Kotlin, Java, MVVM, MVI, Clean Architecture, testing, and publishing basics.
Identified issues in code readability, duplication, scalability, error handling, and crash-prone logic.
Helped resolve Gradle and build issues, UI bugs, lifecycle problems, and state management flaws.
Improved code quality through actionable review feedback and practical fixes for real project tasks.
Supported mentees through a manager-led process by reviewing code and providing structured guidance.
Helped all mentees complete pet projects and technical tasks ready for employer-facing presentation.
Contributed to interview readiness, and all mentees later passed interviews or secured IT roles.

Frontend Developer Intern | Holbi Group May 2021 – Aug 2021 | Remote
Contributed to a web product for online flower sales focused on smooth browsing, ordering, and checkout.
Implemented customer-facing UI for core e-commerce flows based on ready-made designs and technical guidance.
Owned page markup, interactivity, and visual accuracy under senior review during the internship period.
Built catalog, product, cart, checkout, navigation, and reusable UI pages for an online flower store.
Implemented page layouts, UI interactions, and animations based on approved designs and requirements.
Delivered full front-end markup for assigned pages with a focus on visual consistency and usability.
Ensured cross-browser compatibility and adjusted styles for consistent behavior across major browsers.
Translated ready-made layouts into responsive, user-facing interfaces with accurate design implementation.
Worked directly with a senior developer on integration details, technical alignment, and code quality.
Improved front-end discipline through regular code review and feedback on standards and best practices.
Learned to follow design systems, technical requirements, and structured review processes in delivery.
Strengthened practical skills in HTML, CSS, JavaScript, UI implementation, and production-ready markup.

EDUCATION
Advanced Diploma, Computer Engineering Technology, Humber College, Toronto Canada, Sep 2019 – Jun 2022

LANGUAGES
English – C1, Ukrainian – Native