Сергій

SERHII MALOV
Senior Java / Kotlin Developer
[відкрити контакти](див. вище в блоці «контактна інформація») [відкрити контакти](див. вище в блоці «контактна інформація») https://www.linfiedin.com/in/serhii-malov-232125118/

SUMMARY
Senior Java/Kotlin Developer with 8 years of experience in software development and systems architecture,
specializing in microservices architecture and the Spring framework.
Skilled at creating innovative solutions to enhance technological capabilities and optimize processes.
Throughout my career, I have effectively utilized technologies such as Java 8/11/17, Kotlin, the Spring framework,
Project Reactor, Kafka, Camunda, PostgreSQL, Mongo and Cassandra to deliver scalable solutions and enhance system
performance and reliability.
Key Achievements:
• Optimized database operations, reducing query execution time by 30%. Optimized performance under heavy load.
• Improved the application's performance by optimizing reactive streams in Project Reactor and resolving issues related to
parallel execution of functionality.
• Implemented Kafka for real-time event processing, which improved the system’s data processing speed.
• Automated code quality checks before pushing to GitLab, improving overall code quality.
• Implemented Camunda for business process automation, which increased task visibility, reduced request processing
time, and simplified system scaling through clear service orchestration.
• Increased code coverage with tests, significantly reducing the number of bugs.

SKILLS
Spring Boot Spring Data JPA Spring Cloud Spring Security Spring MVC

Java Kotlin Kafka Design patterns Microservices Hibernate Maven Gradle Project Reactor

Integration and JUnit tests Mockito Rest JSON Git GitLab Swagger

Vue.js HTML CSS JavaScript

SQL MySQL PostgreSQL Elasticsearch Cassandra Hazelcast Mongo

Docker CI/CD Camunda Nomad Consul Grafana

EXPERIENCE
Senior Kotlin Software Engineer
GoSolo
04/2025 - Present
Achievements:
- I developed a British banking app for businesses that helps micro-enterprises get started, conduct banking transactions,
and accept payments faster and more easily. The app offers a comprehensive package of services, including company
registration in the UK, business banking, and card payment processing, as well as special offers and discounts from our
partners.
Used tools and technologies:
Java 11/17, Kotlin, Spring (Boot, Reactor, WebFlux, Data, Rest, Cloud, Security, Integration), Project Reactor, Microservices, Maven,
Integration and JUnit tests, Mockito, Rest API, JSON, GIT, Hibernate, RabbitMQ, Jenkins, Mongo, Hazelcast, GitLab, Swagger
Responsibilities:
• Participated in designing and developing the project architecture.
• Integrated the application with external systems.
• Extended existing functionality and implemented new features.
• Maintained existing functionality and fixed bugs.
• Wrote unit tests (JUnit) and integration tests.
• Conducted code reviews.
EXPERIENCE
Senior Java / Kotlin Software Engineer
PlatMaster
03/2020 - 04/2025
Achievements:
- I have been developing an electronic trading platform from the ground up, incorporating technological features that
streamline the connection between supply and demand. The web application is built on a microservices architecture.
- I have developed an intuitive educational platform for students and teachers that simplifies the exchange of information and
materials in the educational process.
Used tools and technologies:
Java 8/11/17, Kotlin, Spring (Boot, MVC, Data JPA, Cloud), Microservices, Maven, Gradle, Integration and JUnit tests, Mockito, Rest
API, GIT, Hibernate, Kafka, Camunda, Nomad, Consul, Grafana, PostgreSQL, Elasticsearch, Cassandra, Hazelcast, GitLab, Swagger
Responsibilities:
• Participated in developing the project architecture.
• Created microservices, developed new functionality.
• Introduced new technologies into the project, maintained existing functionality and fixed bugs.
• Wrote JUnit tests and integration tests for the project.
• Assisted in task assignments for developers.
• Conducted code review.

EXPERIENCE
Full-Stack Developer
ELMA
05/2018 - 03/2020
Achievements:
- I developed a SaaS project focused on accounting and sales systems from the ground up. The web application is built on a
microservices architecture, with the frontend implemented using the Vue.js framework. Authentication is secured through
Spring Cloud Security (OAuth2). The application facilitates document management (receipts, invoices, transfers, write-offs,
completions, etc.) and allows users to view and analyze various reports.
- Created a web project for workshop workers' workstations.
- Adjusted the program's interaction with IP telephony.
- Developed an Android application for basic CRM functions
Used tools and technologies:
Java 8, Spring (Boot, MVC, Security, Data JPA, Cloud), Microservices, Maven, Junit, Rest, JSON, GIT, Hibernate, MySQL, SQL, Vue.js,
HTML, CSS, JavaScript
Responsibilities:
• In a team of three, I managed such tasks as uploading projects to the repository, fixing releases, creating sprints and distributing
tasks.
• Planned and developed the project architecture.
• Analyzed and made decisions on the use of project technologies.
• Developed new functionality.
• Maintained existing functionality and fixed bugs.
• Conducted code review.

EDUCATION
Master’s Degree, Field of Study – Public Management and Administration
Taras Shevchenko National University of Kyiv | Ukraine
2022 - 2024

Specialist Degree, Field of Study - Computer science
National Pedagogical University of Glukhiv | Ukraine
2002 - 2007

LANGUAGES
English: Intermediate Ukrainian: Native