Едуард

Eduard Panasenko
Java Developer

Software Engineer with ~4 years of experience specializing in the Java/
Spring ecosystem. Developed and maintained microservices with a focus on
backend logic and system integration using Kafka for messaging and Docker
for containerization. Experienced in working with RDBS to manage complex
data structures and ensure data integrity. Committed to Clean Code
principles, SOLID and high test coverage to ensure system reliability.

Phone number: [відкрити контакти](див. вище в блоці «контактна інформація»)
E-mail: [відкрити контакти](див. вище в блоці «контактна інформація»)

Skills
Languages: Java, Kotlin, Dart, HTML, CSS, JavaScript, TypeScript, SQL
Frameworks and libraries: Spring Framework (Web, Boot, Data, Security), Hibernate, Apache Kafka, RabbitMQ,
React.js, Lombok, Flyway, JavaFX, Flutter, Firebase, Stripe, RevenueCat,
Database: MS SQL Server, Azure SQL Database, PostgreSQL, H2, Cloud Firestore
Testing: JUnit, Mockito
Tools: Swagger, Git, IntelliJ IDEA, SourceTree, Postman, Xcode, Android Studio
CI/CD: Azure Pipelines, Docker

Project Experience

Company: Cosmith.io - Led the full-scale migration from a C# and React Native environment to
Projects: Content Jungle FlutterFlow and Firebase, optimizing the codebase and reducing
maintenance overhead
Duration: since 01.2026
- Successfully reduced the cost and time of implementing new features by
Skills: FlutterFlow, Dart, Flutter, transitioning to a low-code approach, significantly lowering the business's
Java, Spring (Web, Boot), «Total Cost of Ownership».
Firebase, Firebase, Google - Identified and resolved numerous critical legacy bugs, redesigning
Cloud, Stripe, RevenueCat, MUX, problematic core modules to improve overall system stability and
Git performance.

Company: Cosmith.io - Led a development team to execute a complete platform migration from
Projects: Mind Caddie Adalo (No-Code) to a scalable architecture using FlutterFlow, Dart, and
Firebase.
Duration: since 12.2024
- Designed and managed the transition to a high-performance system,
ensuring scalability.
Skills: FlutterFlow, Dart, Flutter,
Node.js, Java (Web, Boot, - Built a dedicated microservice for OpenAI and Eleven Labs WebSocket
Security), JUnit, Mockito, streaming, delivering low latency for real-time AI-powered interactions.
Firebase, Google Cloud, Docker, - Managed containerized services via Docker and Google Cloud Run,
Stripe, RevenueCat, Google streamlining deployment and backend operations.
Analytics, Git

Company: Cosmith.io - Enhanced the core payment infrastructure by integrating Stripe and
Projects: Timeleft RevenueCat to manage subscriptions and financial transactions across 60+
countries.
Duration: 12.2023 - 12.2024
- Architected a server-side analytics integration via AppsFlyer to process
Skills: FlutterFlow, Dart, Flutter, high-volume behavior data, optimizing both backend logic and frontend
Node.js, Firebase, Cloud workflows to increase sales by ~19%.
Firestore, Google Cloud, Stripe, - Designed and implemented scalable app workflows to improve matching
RevenueCat, AppsFlyer, Google algorithms and overall system performance.
Analytics, Git - Identified and resolved critical architectural bugs and system instabilities,
significantly reducing crash rates and improving overall platform reliability

Eduard Panasenko, Java developer 1
Company: Itera - Designed and developed a corporate chatbot using Java and Slack API to
Projects: Donation Bot automate employee donation workflows, integrating it directly into the
company’s operational channels.
Duration: 04.2022 - 12.2023
- Built backend services with Spring Boot to process donation hours and
calculate corporate matching contributions.
Skills: Java, Slack, Spring (Core, - Managed automated deployment and delivery using Azure Pipelines,
Web, Data, Boot, Security), ensuring continuous integration and reliable system updates.
Hibernate, MS SQL Server, H2,
Flyway, Docker, Kafka, Lombok, - Integrated the solution with the existing company infrastructure to enable
JUnit, Mockito, Swagger, Git, automated reporting and streamlined communication workflows.
Azure Pipelines

Company: Itera - Co-developed a web platform from scratch to replace legacy paper and
Project: PCS Web Form Excel-based performance reviews with a centralized digital system
Duration: 04.2022 - 12.2023 - Built a JavaFX desktop application to automate the migration and parsing of
complex Excel (PCS) forms into the new web-based database format.
Skills: Java, Java FX, Spring - Developed robust backend services and interactive web interfaces using
(Core, Web, Data, Boot, Spring Boot, ensuring a seamless evaluation process for interviewers.
Security), Hibernate, MS SQL - Managed database migrations and implemented comprehensive unit/
Server, Azure SQL Database, H2, integration tests to ensure the integrity of the performance matrix data.
Docker, Lombok, JUnit, Mockito,
Swagger, Git, Azure Pipelines,
React.js, TypeScript,

Company: Itera - Implemented new functionalities for an internal office navigation and
Project: Placemaster resource search system using Kotlin and Spring Boot.
Duration: 04.2022 - 12.2023 - Resolved complex bugs and optimized existing codebase to ensure high
system availability and seamless user experience.
Skills: Kotlin, Spring (Core, Web, - Developed comprehensive unit and integration tests using JUnit and
Data, Boot, Security), Hibernate, Mockito, maintaining high code reliability.
MS SQL Server, H2, Lombok,
JUnit, Integration testing, Mockito,
Swagger, Git

Company: Wildberries - Developed and maintained backend services using Java and Spring Boot,
Project: Wildbest focusing on business logic for automated marketplace interactions
Duration: 06.2021 - 03.2022 - Built a web parser to extract product information, questions, and reviews
from marketplace pages, ensuring data accuracy for further processing.
Skills: Java, Slack, Spring (Core, - Integrated RabbitMQ to handle background tasks and automated service
Web, Data, Boot, Security), flows.
Hibernate, RabbitMQ, Docker, - Containerized the application using Docker to ensure environment
Lombok, RESTful api, JUnit, consistency and simplify scaling.
PostgreSQL, H2, Swagger, Git

Education

Year: 2017 – 2023 National Technical University of Ukraine «Kyiv Polytechnic Institute»,
Master’s degree in information system and technologies

Languages
Ukrainian Native
English Upper-Intermediate

Eduard Panasenko, Java developer 2