Сергей

Last updated in February 2025

Serhii Filatov
+ Ukraine # [open contact info](look above in the "contact info" section) „ [open contact info](look above in the "contact info" section) } yungzef

Experience
Android Developer Fully remote
NSQ.market, Q3.market 2022 - 2025
2024 – 2025:
◦ Implemented Material Design 3 (M3) across multiple applications, ensuring a modern and consistent UI
◦ Developed a video processing application using FFmpeg, enabling features like:
– Video trimming, cropping, and resolution adjustments
– Format conversion and compression optimization
– Overlaying effects and watermarks in real time
◦ Integrated CameraX to develop real-time visual effects, including:
– Custom filters and overlays applied dynamically to the camera feed
– Face tracking and interactive AR elements
– Optimized rendering using Jetpack Compose Canvas API for smooth UI performance
◦ Improved offline capabilities by integrating local caching and background processing with WorkManager
◦ Strengthened CI/CD processes by automating testing and deployment with GitHub Actions
2023 – 2024:
◦ Developed backend services for multiple applications:
– Poll creation and searching system using FastAPI and SQLite3
– Video downloader for social media platforms using youtube dl
– Business card creation and search system powered by FastAPI and SQLite3
◦ Chose FastAPI as the primary backend framework, ensuring rapid development and high performance
◦ Designed and implemented a custom real-time particle effects library to enhance UI uniqueness, utilizing:
– Jetpack Compose Canvas API for drawing dynamic effects
– Android View Canvas for rendering in legacy UI
– Lottie for integrating complex pre-designed animations
2022 – 2023:
◦ Migrated a legacy project from Java to Kotlin, improving maintainability and performance
◦ Introduced Jetpack Compose, reducing UI development time by 30%
◦ Improved application architecture by implementing Clean Architecture and modularization
◦ Implemented face detection and blurring in photos using Firebase ML Kit

Android Developer Intern Mariupol, Ukraine
LiveLib 2 2021 - 2022
◦ Added new functionality to existing screens (Pagination, Rating System on comments, etc.)
◦ Refactored legacy code to improve maintainability and readability
◦ Gained experience in Android architecture patterns, including Clean Architecture, MVP, and UseCase-
driven design
◦ Worked with Moxy to implement the MVP pattern and improve UI logic separation
Technologies

◦ Languages: ◦ Jetpack Libraries:
– Java – ViewModel
– Kotlin – LiveData / StateFlow
◦ UI and Design: – Navigation Component
– Room (SQLite ORM)
– Jetpack Compose
– WorkManager
– XML (Android Views)
– Material Design 3 (M3) ◦ Multimedia and Graphics:
– Custom animations (Lottie, MotionLayout) – CameraX (real-time effects)
◦ Architecture and Patterns: – FFmpeg (video processing)

– MVVM, MVP (Moxy) ◦ Networking:
– Clean Architecture – Retrofit
– UseCase – OkHttp
◦ Asynchronous Programming: ◦ CI/CD & Version Control:
– Coroutines / Flow – Git / GitHub / GitLab
– GitHub Actions