Михайло

MYKHAILO MALINOV
Backend Developer
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Professional Summary

Junior Java Backend Developer with 2+ years of commercial experience across Java (Spring Boot) and PHP (Laravel). Built a production RAG system backend using Spring Boot — including JWT-secured REST APIs, user and role management, vector search via a self-hosted embedding model, document indexing via RabbitMQ, and real-time streaming with SSE. Strong understanding of multi-tenant database architecture, queue-based processing, and Docker-based deployments. Additional backend experience with NestJS and Python (FastAPI).

Technical Skills

Languages: Java, PHP, JavaScript/TypeScript, Python
Java / Spring: Spring Boot, Spring Data JPA, Hibernate, Spring Security (JWT), Flyway, Maven
Backend Frameworks: Laravel, NestJS, FastAPI
Databases: PostgreSQL (multi-tenancy, pgvector), MySQL, Redis (caching, queues)
Message Brokers & Queues: RabbitMQ, Laravel Horizon, Redis queues
Real-Time: SSE (Server-Sent Events), Laravel Reverb (WebSockets), Node.js WebSocket services
AI / RAG: Vector search (pgvector), self-hosted embedding models, REST-based embedding integration
Testing: PHPUnit (feature & unit tests), Laravel testing utilities
Infrastructure: Docker, Linux (SSH), Ubuntu server, Nginx
APIs & Integrations: Cloudflare API, Vchasno API, BunnyStorage (S3), OpenAI API
Frontend (secondary): Vue 3 (Options & Composition API), React, Livewire
Other: OCR pipelines, web scraping/parsing, Git

Work Experience

Backend Developer (Contract) — PalumniAug 2025 – Present
RAG Platform — ConfidentialJan 2026 – Present
Spring Boot + React. Production RAG system for document-based AI search and chat. (NDA — project name undisclosed)
• Designed and implemented JWT-based authentication and authorization using Spring Security
• Built user and role management system with Spring Data JPA and Hibernate
• Integrated self-hosted embedding model via FastAPI REST API for external vector generation
• Implemented pgvector-based semantic search for relevant document chunk retrieval
• Built RabbitMQ consumer pipeline for asynchronous document indexing and embedding processing
• Implemented real-time AI response streaming to the client via Server-Sent Events (SSE)
• Delivered real-time in-app notifications using SSE
• Managed schema versioning across environments with Flyway migrations
• Contributed to React frontend: chat UI and notification components

SEO Site ManagerAug 2025 – Jan 2026
Laravel + Vue 3 (Composition API). Platform for managing SEO websites, built from scratch. Deployed with Docker on Ubuntu.
• Architected RabbitMQ-based queue system for high-volume background job processing
• Built proxy rotation layer and optimized outbound HTTP request handling
• Integrated Cloudflare API for automated DNS and domain management
• Implemented notification system, user roles, and permissions
• Configured Docker-based deployment pipeline on Ubuntu server

Backend Developer — KvaPay, SlovakiaJun 2024 – Aug 2025
NestJS + Vue 3 (Options API). Internal business systems and crypto-ATM management platform.
• Debugged and optimized NestJS backend: improved query performance and resolved bottlenecks
• Built user management module with role-based permissions for crypto-ATM admin panel
• Developed operational dashboards and admin panel functionality
• Contributed frontend features in Vue 3 within a collaborative team environment

Backend Developer (Freelance) — HubtrustJan 2024 – Jun 2024
Laravel + Livewire. CRM system and public website for real estate agents.
• Developed automated property listing parsers (OLX, DimRia) using scheduled cron jobs
• Implemented role-based access control with granular permission management
• Integrated BunnyStorage (S3-compatible) for media file handling
• Built user management system with role and permission architecture

Additional Backend Experience

• PHP / Laravel: multi-tenant SaaS architecture (schema-level isolation), real-time WebSockets (Laravel Reverb), PHPUnit testing, Laravel Horizon queue monitoring
• Python: FastAPI REST services, OCR pipelines, embedding generation for RAG
• Redis: queue management, response caching, session storage
• Node.js: custom WebSocket service for real-time chat (university project)

Education

Comenius University (Univerzita Komenského), Bratislava, Slovakia2022 – 2025

Languages

Ukrainian — Native | Russian — Native | English — B2 | Slovak — B1