Ivan

CONTACT INFORMATION:
Ivan Tsitserkyi
Android Engineer
LinkedIn:
http://[відкрити контакти](див. вище в блоці «контактна інформація»)
SUMMARY
tsitserskyi Versatile Software Engineer with an extensive and diverse skill set spanning Android, Kotlin, Firebase,
SQL/NoSQL DB, Kotlin Multiplatform Mobile, and Jetpack Compose. Proficient in a wide array of
Phone: [відкрити контакти](див. вище в блоці «контактна інформація»)
programming languages, including Java, Kotlin, Python, and C#. Well-versed in frameworks and libraries
E-mail: [відкрити контакти](див. вище в блоці «контактна інформація») such as AndroidSDK, Android-Webview, KTOR, KMP, Retrofit, Dagger, Koin, Hilt, Room, Coroutines, and
many others, showcasing expertise in mobile and web development.
Telegram: @DVBLEX
Android development, contributing to Kotlin Multiplatform Mobile applications and Java/Kotlin
Skype: Ivan Tsitserskyi desktop/web applications with cloud platform integration and machine learning with Python and
GitHub: github.com/DVBLEX TensorFlow.

Location: Lviv, Ukraine Proficiency in testing methodologies, including TestNG, JUnit, Mockito, and TDD. Adept at managing
databases such as SQL and No SQL. Open-source contributor on GitHub repositories.

HARD SKILLS: WORK EXPERIENCE
PROGRAMMING LANGUAGES / TECHNOLOGIES:
June 2023 – Present
• Kotlin
Back-end Kotlin Engineer, «Capgemini Engineering», Lviv, Ukraine
• Java 8,11,17,21
Customer: Health Care department in India.
•KMP, Android Jetpack components, Project description: A microservice system for India's busy healthcare industry that monitors large
MVVM/MVP/MVI architecture, Android- systems in clinics and hospitals and provides AI-powered assessments and advice.
Webview, Firebase and Google Play Services Team: 50+ members in Dev Team, 10 members in QA Team, 5 DevOps, 3 Architects.
ACCOMPLISHMENTS:
• LiveData, Flow, RxJava/RxKotlin - As a key developer, provided the full specter of solution for API on Spring Boot with PostgreSQL
•Android Wear, Samsung SDK on Kotlin for Health Care.
- Collaborated with cross-functional teams, including Product Owners, Frontend developers, and
•KTOR, Spring, Spring Boot
specialized integration teams to design and implement server communication protocols and
• Python ensure seamless team coordination.
• C# - Created the solution using TimeScaleDB that helps increase data processing on the 10 time of
time and space 3 times complexity. Recreated and helped to find a solution for the problem of
removing loops that contain complex ices in business logic using Kafka , Keycloak and Fhir.
TOOLS:
- Maintained full accountability for feature lifecycle management, from initial concept to
• Maven, Gradle monitoring in a production environment, ensuring backward and forward compatibility in a
• Junit, Mockito, Espresso distributed system setting.
- Decoupled internal caches warming logic from primary DB by implementing the fetching of
• Selenium IDE, Webdriver
appropriate configs from the configuration service connected to its private DB, which decreased
the load on primary DB by 20%.
DATABASES:
ENVIRONMENT:
• MySQL, MSSQL, PostgreSQL Technologies: Kotlin, Java 21, Spring Boot 3.2.2, Spring 6+, Keycloak, FHiR, Retrofit, Kafka, JUnit,
• Firebase, Firebase services Mockito, Jenkins.
Database: Oracle, PostgreSQL, TimeScaleDB
INFRASTRUCTURE: Tools: Jira, GitLab, Confluence, IntelliJ IDEA, Checkstyle, Figma, Excel, Swagger.
• GCP,AWS, Docker, Kubernetes
• Jenkins, GitHub actions
JAN 2022 – MAY 2023
COMMUNICATION / PROTOCOLS: Android Engineer, «Globallogic», Lviv, Ukraine
• HTTPS, WebSocket Customers: Healthcare
Project description: Kotlin Multiplatform Mobile application for healthcare department of
• REST, RESTful APIs integration https://www.samsung.com/
• gRPC Team: 5 members in Dev Team and Engineering manager
ACCOMPLISHMENTS:
• Asynchronous, Coroutines
- The application was built with the latest Android guidelines used to have Jetpack Compose
components also Firebase components to manage DB and use Rest API for communicating with
METHODOLOGIES:
other parts of the infrastructure.
• Agile, Scrum, Kanban, extreme - For the best product was used also GCP with ML and voice assistant inside.
programming - Client-side communication and fast improvement of product.
- This product can have supporting at: Samsung Health but in future it can be separate product for
• OOP, Functional programming
CareAtHome on Jetpack Compose or KMP.
• Test Driven Development, Domain Driven ENVIRONMENT:
Design Technologies: Kotlin, AndroidSDK, Firebase, SamsungSDK, Android-Webview, Multiplatform Mobile,
KTOR, KMP, Jetpack Compose, Retrofit, Koin, RXJava 2, Coroutines , Flow, GCP
REMOTE REPOSITORIES: Database: PostgreSQL, Firebase
• Git (Bitbucket, GitHub, GitLab) Tools: Jira, GitLab, Confluence, Android Studio, IntelliJ IDEA, Docker, GCP console, Cloud AI
• Jira, Confluence

ENGLISH: Intermediate (B1)
 APR 2021 – DEC 2021
Back-end Software Engineer, «Telclic Ireland», Lviv, Ukraine
EDUCATION: Customer: Business Information and CrowdFund.
Projects description: projects provide secure/scalable / highly available/solutions for cutting-edge
UNIVERSITY NULP (Lviv, Ukraine) capabilities to efficiently enrich, manage, and deliver content including enrichment and classification,
DEPARTMENT OF Software Engineering content management/processing / CrowdFund platform and BikeSharing
DEGREE IN Software Engineering (MS) Team: 7 members in Dev Team, 2 members in QA Team and PM
GRADUATION YEAR 2019 ACCOMPLISHMENTS:
- Developed several applications with Spring stack. My responsibilities were the MVC approach to
UNIVERSITY NULP (Lviv, Ukraine) build business logic and Rest-API for communicating with the front-end.
DEPARTMENT OF Software Engineering - I used to use different approaches for building apps like TDD and others. Also had different ways
DEGREE IN Software Engineering (BS) about projects like: from zero to hero and develop new features for a ready platform like this:
https://www.bikeshare.ie/
GRADUATION YEAR 2017 - Actively participated in Low-Level Design discussions, identifying potential issues, and
contributing innovative solutions to complex problems.
ENVIRONMENT:
Coursera Technologies: Java 11, Spring, Spring Boot, Maven, SQL, REST, Mockito, Tomcat, TypeScript, Angular CLI
SPECIALIZATION ML&AI - TensorFlow Database: PostgreSQL, MySQL
GRADUATION YEAR 2023 Tools: Jira, Git (Bitbucket), Confluence, SonarQube, IntelliJ IDEA, CheckStyle, Docker
GCP
SPECIALIZATION GCP skills JUL 2019 – MAR 2021
PERIOD JAN 2023 - present Android Developer, «BMW», Lviv, Ukraine
Customer: BMW automotive.
Bobocode Project description: solution to park automotive.
TRAINING PROGRAM Java Ultimate 3.0 Team: 10 developers, 5 AQA, 2 MQA, PM, 2 Architects, Product Manager.
PERIOD AUG 2023 – FEB 2024 ACCOMPLISHMENTS:
- Parkmobile - worked on the DB module and integrated Amplitude, firebase analytics, adjust.
- Parknow - worked on the API module, sent requests and data to Services (BMW). It was local
MENTORING:
services within AriaMotors that were converted into this app.
- Implemented tasks as part of a developer training program, which included developing new types
Mastermind of questions, ensuring XSS validation, test coverage and technical debt decreasing.
APPLICATION Mastermind Application - Addressed technical debt by refactoring complex code sections, improving their maintainability
PERIOD FEB 2024 - present and clarity, and contributing to the overall software quality.
- Researched and familiarized myself with the domains, codebase, and architecture.
ENVIRONMENT:
Technologies: Kotlin, AndroidSDK, Firebase, Android-Webview, Retrofit, Koin, RXJava 2, Coroutines ,
Flow, Room
PROJECTS: Database: Firebase, firebase analytics
Tools: Jira, GitLab, Confluence, Android Studio, IntelliJ IDEA, Docker, GCP
Bibernate – custom ORM framework,
JAN 2019 – APR 2019
inspired by Hibernate.
The leading group of 5 professionals Software Engineer, «Glory to the Nation Foundation», Lviv, Ukraine
developers. Customer: Glory to the Nation Foundation.
Project description: system for share public data for procurement.
Bring – custom IoC and DI framework,
Team: one developer, PM.
inspired by Spring Core. ACCOMPLISHMENTS:
The leading group of 5 professionals - Managed system for share public data for procurement
developers. - Developed comprehensive reports and statistics for a hierarchical database relations model
Address Book Ktor – web application ENVIRONMENT: Java, AndroidSDK, Firebase,Retrofit, Dagger, RXJava 2, Room ,GitHub
where a user can manage an address
book. JUL 2018 – JAN 2019
RDBs and Flow – Room DataBase and
Software Engineer, «Estella», Lviv, Ukraine
Test Coroutines-Flow
Description: Development the application for furniture warehouse.
Team: one developer, PM, 1 MQA
ACCOMPLISHMENTS:
Application for a small furniture warehouse for admins and employees
SOFT SKILLS: ENVIRONMENT: Java, AndroidSDK, SQLite, Retrofit, Hilt, RXJava , Room ,GitHub

• Lifelong Learning OCT 2018 – Present
• Leadership Freelance, Ukraine
• Ownership Description: providing freelance development services to clients: backend, android, database schema
• Troubleshooting designing, and data analysis, AI, ML, TensorFlow
ENVIRONMENT: Kotlin, Java 8,11,17,21, Python, Spring, AndroidSDK, Android-Webview , SQL, JDBC,
• Communication and negotiation
ADO.NET, ASP.NET, Entity Framework, Docker, TensorFlow.
• Quick adaptability
• Teamwork, organization
• Product-oriented mindset