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Anna Lozytska
Verified Expert in Engineering
Android Developer
Paris, France
Toptal member since October 28, 2021
Bio
With over 10 years of experience on projects in different industries and development stages, Anna gained a ground skillset that combines both front and back-end domains with a strong focus on creating scalable, high-quality code and excellent UX. Her aspiration for product success makes her a self-starter and proactive team player on the edge of engineering and product management.
Portfolio
Algorithmic Trading
Python, Algorithmic Trading, Jupiter, Pandas, IBKR APIs, QuantConnect...
Toptal
Android, Android Architecture Components, Android SDK, Background Jobs, Dagger...
Hopper
Scala, JavaScript, CSS, HTML, Kubernetes, Angular, Android...
Experience
- Android - 6 years
- Java - 6 years
- Android SDK - 6 years
- Background Jobs - 4 years
- RxJava - 4 years
- Dagger - 4 years
- Kotlin - 3 years
- REST - 3 years
Preferred Environment
Android Studio, PyCharm, Jupiter
The most amazing...
...about me are the speed of learning and adaptation, and structured approach to creating the top-class product.
Work Experience
Python Engineer
2024 - PRESENT
Algorithmic Trading
- Developed custom algorithmic trading platforms for trading Forex, stocks, and options, integrated with MetaTrader and InteractiveBrokers Trader Workstation.
- Conducted financial data analysis and constructed trading models using Pandas on historical data from IBRK APIs and QuantConnect.
- Created custom browser-based UI for monitoring and interacting with automated trading systems.
Technologies: Python, Algorithmic Trading, Jupiter, Pandas, IBKR APIs, QuantConnect, MetaTrader API
Android Engineer
2021 - PRESENT
Toptal
- Contributed to a full cycle of new complex feature development, helped clarify product and design specs, set up API, wrote implementation on Android and mentored development on the iOS platform, and tracked post-release metrics.
- Improved the structure, convenience of usage, and maintainability of the app's core component.
- Contributed to the overall code quality and stability via thorough code reviews and tech discussions.
Technologies: Android, Android Architecture Components, Android SDK, Background Jobs, Dagger, SDKs, Agile, Back-end, Mobile Development, Flutter, Figma, Microservices, Python, JavaScript, HTML, SQL, CSS, APIs, Git, Jupyter Notebook, API Design, Data Science, GitHub, Architecture, Dart, Version Control, API Architecture, Mobile Apps, Reactive Programming
Back-end, Front-end, and Android Engineer
2022 - 2023
Hopper
- Developed a key feature that improved the profitability of the team's domain.
- Contributed to code quality and scalability through ground review of product requirements and their potential development.
- Regularly delivered requested features under strict deadlines and vague estimations.
Technologies: Scala, JavaScript, CSS, HTML, Kubernetes, Angular, Android, Google Cloud Spanner, Google Cloud Platform (GCP), Microservices, REST APIs
Android Engineer
2022 - 2023
Hopper
- Transitioned from Android developer to universal engineer, able to complete any task required by the product.
- Designed and developed a feature that marginally increased product profitability.
- Contributed to the design and implementation of a more stable and scalable system architecture.
Technologies: Scala, Microservices, JavaScript, Angular, Google Cloud Spanner, Google Cloud, Multithreading, HTML, Android, iOS
Android Developer | Product Manager
2018 - 2021
Bolt
- Helped stabilize and develop new features in Bolt apps like ride-hailing, delivery, and micro-mobility platform with millions of users. Extensively worked with maps, notifications, location and background services, custom UI, cache, and network APIs.
- Initialized and implemented the project of analyzing the app's network data consumption.
- Analyzed and led the implementation of the in-car navigation usage improvements.
- Improved the app logging greatly, which enabled more effective issue investigation.
- Initialized and maintained cross-department communication on features scope and delivery timeline.
- Contributed to migration to a single architecture approach across different parts of the app.
Technologies: Kotlin, Java, Android SDK, Firebase, RxJava, Dagger, Model View Presenter (MVP), Model View ViewModel (MVVM), Custom Views, REST, RIBs Architecture, Android, Maps, Google Maps API, Google Maps SDK, Google Maps, SDKs, Agile, Mobile Development, Figma, APIs, Git, API Design, GitHub, Architecture, Version Control, API Architecture, Mobile Apps, Reactive Programming
Android Developer
2017 - 2018
Lohika
- Helped company clients in the fintech and mobile security fields to improve existing and implement new features in their mobile apps. Worked with various frameworks adopted by clients like RxJava, Dagger, custom UI, and in-house testing frameworks.
- Adapted quickly to new big projects with complex codebases and work processes.
- Made a suggestion and implemented feature improvement to one of the company clients that worked in the mobile security field.
Technologies: Kotlin, Java, Dagger, Unit Testing, RxJava, Android SDK, Android, Maps, Google Maps API, Google Maps SDK, Google Maps, SDKs, Agile, Mobile Development, Figma, Git, GitHub, Version Control, Mobile Apps, Reactive Programming
Android Developer
2015 - 2017
Star
- Helped company clients in custom Android ORM and healthcare fields to implement new and improve existing features in their mobile apps. Worked with various frameworks adopted by clients, like custom UI, mobile databases, and background services.
- Created the tool that sped up the development and testing of new features.
- Contributed to meeting tight project deadlines for key company clients.
Technologies: Java, Android SDK, Multithreading, SQLite, Android, Maps, Google Maps API, Google Maps SDK, Google Maps, SDKs, Agile, Mobile Development, SQL, Git, GitHub, Version Control, Mobile Apps, Bluetooth
Experience
Dev Challenge
In 2016 I took part in an all-Ukrainian programming contest and became a winner in the Android Developer category.
The contest consisted of two stages:
• Create a fully functioning audio streaming app within one week.
• Create a customizable analog clock view within six hours.
The contest consisted of two stages:
• Create a fully functioning audio streaming app within one week.
• Create a customizable analog clock view within six hours.
Support App for Ukrainian Refugees
Flutter app that provided information and social support for Ukrainian refugees in Estonia.
I designed and implemented the whole app and back end using Firebase.
The app provided information about vital institutions, available support programs, and social events organized by volunteers. It also had the functionality of posting questions/requests for help that were broadcast to other members and notified users about replies.
I designed and implemented the whole app and back end using Firebase.
The app provided information about vital institutions, available support programs, and social events organized by volunteers. It also had the functionality of posting questions/requests for help that were broadcast to other members and notified users about replies.
Skills
Libraries/APIs
RxJava, REST APIs, Google Maps API, Google Maps SDK, Google Maps, Android Architecture Components, Pandas
Tools
Android Studio, Slack, Jira, Trello, Git, GitHub, Figma, PyCharm
Languages
Kotlin, Java, Python, Dart, JavaScript, HTML, SQL, CSS, Scala
Frameworks
Android SDK, Glide, Dagger, Flutter, Angular
Paradigms
Model View Presenter (MVP), REST, Agile, Mobile Development, Reactive Programming, Model View ViewModel (MVVM), Unit Testing, API Architecture, Microservices
Platforms
Firebase, Android, Jupyter Notebook, iOS, Kubernetes, Google Cloud Platform (GCP), QuantConnect
Storage
SQLite, Google Cloud Spanner, Google Cloud
Other
Custom Views, RIBs Architecture, Multithreading, Background Jobs, Maps, SDKs, API Design, Architecture, Version Control, Mobile Apps, Room, APIs, Bluetooth, Back-end, Data Science, Jupiter, Algorithmic Trading, IBKR APIs, MetaTrader API
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