Денислав

Denyslav Volyn-Danilov
Junior Fullstack Developer (Python / Node.js / React)

 Location: Odesa, Ukraine (Open to Remote)
 Email: [открыть контакты](см. выше в блоке «контактная информация»)
 Telegram: @xprk1
 GitHub: github.com/WzRd-off

PROFESSIONAL SUMMARY
Detail-oriented and architecturally-minded Junior Fullstack Developer with hands-on experience
building end-to-end web applications. Proven track record of developing scalable RESTful APIs
using both Python (FastAPI) and Node.js (Express.js), combined with modular, responsive
frontends in React. Adept at implementing secure JWT-based authentication, complex Role-
Based Access Control (RBAC), database migrations, and background cron services. Proficient in
containerization (Docker) and professional team workflows (Gitflow). Committed to writing
clean, dry, and maintainable code aligned with SOLID principles.

TECHNICAL SKILLS
 Backend Development: Node.js, Express.js (Controller-Service pattern), Python,
FastAPI
 Frontend Development: React, Context API, React Router, JavaScript (ES6+), HTML5,
CSS3, Tailwind CSS
 Databases & ORMs: PostgreSQL (Raw SQL migrations, transaction management),
SQLite, SQLAlchemy ORM, Alembic
 DevOps & Tools: Docker, Docker Compose, Git, Gitflow, Postman, Linux CLI
 Architecture & Security: RESTful API Design, JWT Authentication & Authorization,
Role-Based Access Control (RBAC), Custom Error-handling Middlewares,
Swagger/OpenAPI
 Languages: Ukrainian (Native), Russian (Fluent), English (B1 - Intermediate,
comfortable reading technical documentation and communicating)

PROJECT EXPERIENCE
Gardening Services Management Platform | Fullstack Personal Project

 Technology Stack: Python, FastAPI, SQLAlchemy, Alembic, React, Tailwind CSS,
Docker, Docker Compose, Git
 Designed and engineered a multi-tenant service marketplace supporting unique
interactive dashboards for Clients, Managers, and Field Teams.
 Developed a scalable FastAPI REST API integrated with PostgreSQL via
SQLAlchemy, using Alembic to safely manage and execute database schema
migrations.
 Built a secure custom JWT authentication mechanism with granular Role-Based Access
Control (RBAC) to enforce strict endpoint security.
 Developed a responsive, state-driven React client implementing dynamic role-based
routing and a robust global AuthContext to manage secure session lifetimes.
  Orchestrated the entire multi-container environment (FastAPI, React frontend,
PostgreSQL) using Docker and Docker Compose to ensure seamless development-to-
production parity.

System Service Center Management Platform | Fullstack Personal Project

 Technology Stack: Node.js, Express.js, PostgreSQL, React, Tailwind CSS, Docker,
Docker Compose, Git
 Built a production-grade enterprise system managing repair requests, service histories,
and technician schedules for individuals and business clients.
 Structured the backend codebase using the Controller-Service pattern, cleanly isolating
request parsing, core business logic, and database operations.
 Authored custom, centralized Express middlewares for robust global error handling
(ApiError) and request body validations to maximize server resilience.
 Managed relational databases using structured PostgreSQL raw SQL migrations,
including timezone-compliance (tz_compliance) audits.
 Developed an interactive React management console featuring complex server-side data
pagination, dynamic filtering, and custom modular form validation components.

Private Cataloging & Digital Literature System | Fullstack Personal Project

 Technology Stack: Node.js, Express.js, PostgreSQL, React, CSS, Git
 Implemented a secure digital archiving application with a streamlined interface for
cataloging and managing restricted digital literature.
 Designed and built a local media upload and storage pipeline using Express middlewares
to securely persist digital assets on the server while storing mapped relative paths in
PostgreSQL.
 Engineered an automated background maintenance subsystem using Node.js cron-
scheduling tasks (cron.service.js) for scheduled file-system cleanups.
 Built dynamic, intuitive React-based catalog views with fluid search functionality and
smooth document metadata updates via RESTful API integrations.

EDUCATION
Junior Bachelor of Computer Science & Software Engineering (In Progress)

 Institution: Private Professional Educational Institution Odesa College of Computer
Technologies and Design "Server", Odesa, Ukraine
 Expected Graduation: 2027

KEY ACHIEVEMENTS & METHODOLOGIES
 Clean Code Champion: Strictly adhere to OOP principles, SOLID, DRY, and clean
architecture designs, producing highly maintainable and readable codebases.
 Professional Gitflow: Experienced in branch-per-feature development model,
structuring precise commits, raising detailed Pull Requests, and conducting constructive
peer code reviews.
 End-to-End Ownership: Confident in owning the entire lifecycle of a feature, from
database schema design and API endpoint implementation to UI/UX integration and
containerized deployment.