Олександр Veteran

​Oleksandr Fedchyk​
​ ontacts:​
C ​ ddress:​
A
​Phone, Viber, WhatsApp: [open contact info](look above in the "contact info" section)​ ​Kyiv​
​Email: [open contact info](look above in the "contact info" section)​ ​Ukraine​
​Github:​​fedchyk​
​LinkedIn:​​oleksandr_fedchyk​

​Java Software Engineer​
​Java​​Software​​Engineer​​with​​4+​​years​​of​​backend​​experience​​and​​a​​strong​​engineering​​background​​in​
h​ igh-load​ ​systems,​ ​data​ ​processing,​ ​and​ ​integrations.​​Experienced​​in​​designing​​microservices,​​building​
​resilient​ ​data​​pipelines,​​and​​integrating​​AI/LLM​​solutions​​into​​backend​​systems.​​Focused​​on​​reliability,​
​performance, and clean architecture.​

​ rofessional​ L
P ​ anguages & Core:​​Java, OOP, Multithreading, Collections,​​Exception Handling.​
​Skills​ ​Backend & Frameworks:​​Spring Boot, Spring MVC, Spring​​WebFlux, Spring Data​
​JPA, Spring Security, Hibernate, Spring AI.​
​Testing:​​JUnit, Mockito​
​Databases:​​PostgreSQL, MySQL, Elasticsearch.​
​Messaging & Storage:​​RabbitMQ, MinIO, AWS S3.​
​Tools & DevOps:​​Docker, Git, Maven, Gradle, CI/CD​​(GitHub Actions), iDRAC, iLO.​
​API & Web​​: REST, OpenAPI, HTTP, JSON/XML​
​AI & LLM integration:​​Ollama, LiteLLM, LocalAI, n8n,​​Open WebUI, Claude Code.​
​Others:​​SonarQube, Grafana, Jira, Confluence.​
​Languages:​​Ukrainian (native), English(intermediate).​
​Education​ ​2003-2009 (MS)​
​UNIVERSITY:​​NTUU “Kyiv Polytechnic Institute”​
​INSTITUTE:​​Institute of Energy Saving and Energy Management​
​Work​ ​Java Software Engineer | MilTech | 2022 – Present​
​Experience​ ​○​ ​Designed and developed scalable REST backend services for data-intensive​
​applications​
​○​ ​Built a data scraping service for extracting and processing data from external​
​sources​
​○​ ​Designed and implemented components of a data migration service for reliable​
​data transfer between systems​
​○​ ​Contributed to system analysis and solution design, helping define architecture​
​and key components​
​○​ ​Designed and implemented AI-powered data extraction services using LLMs​
​○​ ​Built AI-assisted workflows and integrated LLM services into backend pipelines​
​for automated data processing​
​○​ ​Applied security practices to identify and mitigate common vulnerabilities​
​Self-Employed | Electronics Repair & Retail | 2018 – 2022​
​○​ ​Operated and scaled a small electronics repair and retail business.​
​Chief Engineer | Electricity Company “LNK” | 2016 – 2018​
​○​ ​Led full-cycle project delivery (initiation → deployment → maintenance)​
​○​ ​Controlled project timelines, costs, and technical documentation, staff training​
​Engineer | DTEK / Kyivenergo | 2008 – 2016​
​○​ ​Implemented Lean Manufacturing practices (Kaizen, Kanban, 5S)​
​Personal​ ​Engineering mindset with a strong drive to understand systems, hands-on troubleshooting​
​Qualities​ ​approach, and focus on building reliable and maintainable solutions.​