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Andrii Bodnar
Junior Backend Developer | Node.js · TypeScript · Python · PostgreSQL · AI / LLM
Khmelnytskyi, Ukraine · [open contact info](look above in the "contact info" section) · [open contact info](look above in the "contact info" section) · GitHub · LinkedIn

SUMMARY
Junior Backend Developer with hands-on team experience building REST APIs and backend services with Node.js (NestJS, Express),
TypeScript, Python (FastAPI) and PostgreSQL. Built authentication, booking, database, notification and third-party integration features,
and developed an AI/ML security-event analysis platform with RAG, LLM APIs (Anthropic, AWS Bedrock) and anomaly detection.
Experienced with Docker, Linux, automated testing (Jest, Pytest), API documentation, Git workflows and code reviews.
TECHNICAL SKILLS
Languages: TypeScript, JavaScript, Python, SQL AI / LLM: RAG, LLM APIs (Anthropic, AWS Bedrock),
Backend: Node.js, NestJS, Express, FastAPI, REST APIs, embeddings, ChromaDB, function-calling agents, LoRA
Swagger/OpenAPI DevOps / Tools: Docker, Docker Compose, Linux, Git, AWS S3,
Databases: PostgreSQL, TypeORM, SQLAlchemy, MongoDB; Azure Container Apps
relational modeling, migrations, query optimization Testing: Jest, Pytest; unit & integration tests
Security: JWT/OAuth, route guards, role-based access, rate Frontend (basic): React, Redux, HTML, CSS
limiting
PROJECTS
Backend Developer - Book-it (Beauty & Wellness Booking Platform) Client app · Provider app Aug 2025 - Present
Team startup project (MVP in active development) | Node.js, NestJS, TypeScript, PostgreSQL, TypeORM, Docker, AWS S3, JWT, Jest
• Developed REST API modules (appointments, services, providers, reviews, favorites, working hours) with validation and role-based
access.
• Implemented JWT access/refresh tokens, Google OAuth, route guards and rate limiting; designed TypeORM entities/migrations and
optimized availability-search queries.
• Integrated web-push, Nodemailer, Telegram and Google Calendar; implemented S3 media uploads with Sharp/presigned URLs, Jest
tests and Swagger/OpenAPI documentation.
AI/ML Security Event Analysis Platform (Bachelor Diploma Project) GitHub 2026
Python, FastAPI, PostgreSQL, SQLAlchemy, Isolation Forest, XGBoost, ChromaDB, Anthropic API, AWS Bedrock, LoRA, Docker, Azure
Container Apps
• Built a server-side pipeline for security-event ingestion and hybrid analysis using deterministic rules, anomaly detection and LLM-
based incident diagnosis.
• Implemented RAG over historical incidents with ChromaDB, Anthropic / AWS Bedrock integrations and a function-calling agent;
added a local Qwen2.5-1.5B + LoRA inference path.
• Evaluated prompt-injection resilience and model quality, and deployed components with Docker to Railway / Azure Container Apps.
Full-Stack Developer - Public Patronage of Military Units GitHub May 2024 - Dec 2024
Non-commercial project | FastAPI, PostgreSQL, React, Redux, Docker, Auth0, Pytest, Jest
• Built backend services and REST endpoints with FastAPI/PostgreSQL and contributed to the React/Redux client, authentication flow
and API integration.
• Containerized the backend with Docker Compose and added frontend/backend automated tests.
EDUCATION
BSc in Computer Science (Software Engineering), Igor Sikorsky Kyiv Polytechnic Institute 2022 - 2026
Core coursework: Algorithms & Data Structures, Databases, Object-Oriented Programming, Operating Systems, Networks.
SELECTED COURSES & LANGUAGES
Courses: CS50x - HarvardX/edX; NestJS Zero to Hero - Udemy; SQL & PostgreSQL for Developers - Udemy
Languages: English - Intermediate (B1) | Ukrainian - Native