Олександр

Mishchenko Oleksandr
Technical Support Engineer
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Kyiv, Ukraine 14.04.1999 (27 y.o.)

Professional Experience
01/2022 – 07/2026 Individual activity, Algorithmic Trading & Software Development
Kyiv, Ukraine Managed, monitored, and maintained a dedicated home-server infrastructure on Linux
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hosting analytical scripts 24/7, ensuring 99.9% uptime.
Configured and deployed containerized environments using Docker to streamline
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application hosting and facilitate quick troubleshooting.
Designed and integrated a custom automated monitoring solution (via Discord API) to track
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server health, script execution, and API connection status, allowing for real-time response.
Diagnosed and resolved network and data flow issues by analyzing system logs and
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troubleshooting REST API and WebSocket integration bottlenecks

02/2020 – 01/2022 EPAM, Middle Java Developer
Kyiv, Ukraine Collaborated closely with clients and business stakeholders to gather requirements, resolve
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technical blockages, and align on integration issues.
Acted as an escalation point (L3) for investigating, debugging, and resolving complex
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technical incidents in production environments.
Authored and maintained technical documentation, including API specifications, system
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architecture diagrams, and step-by-step setup guides to improve the team's knowledge base.
Conducted code reviews and mentored junior developers, ensuring high-quality standards
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and helping team members troubleshoot development bottlenecks.

11/2018 – 02/2020 EPAM, Junior Java Developer
Kyiv, Ukraine Maintained and supported the integration of third-party APIs and microservices, performing
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root-cause analysis on data flow anomalies and connection drops.
Analyzed system logs and database queries (SQL) to diagnose backend performance issues.
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Refactored legacy code to optimize system performance, minimize technical debt, and
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reduce the frequency of system errors.
Covered code with comprehensive unit and integration tests (JUnit, Mockito) to ensure
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stable system behavior after bug fixes and updates.

Education
2016 – 2020 Bachelor in Software Engineering,
Kyiv, Ukraine National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

Skills
Integrations & Architecture System Administration & DevOps SQL
REST API, WebSockets, Microservices, Linux, Docker, Gitlab CI/CD PostgreSQL, MySQL, Hibernate,
RabbitMQ, Maven, Gradle Spring JDBC
Spring Framework
Java 17/21 Boot, MVC, Security, AOP, Data JPA, QA
Concurrency/Multithreading, Cloud JUnit, Mockito, Spring Boot Test
Collections Framework, Stream API

Languages
English German Ukrainian Russian
B2 A2