Vitalii

Vitalii Zakharchuk
Linkedin: [open contact info](look above in the "contact info" section) Telegram: https://t.me/straik555

BACKEND DEVELOPER
SUMMARY
Backend Developer with 15 months of hands-on experience building REST APIs, admin panels, and authentication systems
across three production projects using Express.js and NestJS. Skilled in CRUD architecture, middleware & validation
pipelines, database design, and authorization flows (JWT/Basic/Bearer/Session). Complemented by 1+ years of React
Developer experience, designing and implementing highly-responsive user interface components and translating designs &
wireframes into high-quality front-end code.

PORTFOLIO
• https://www.spoto.com/ (React)
• https://billsmoov-dev.web.app (React)
• https://24rolls.com.ua/ (React)
• https://blogger-platform-plum.vercel.app/api/ (Backend — Blogger Platform API, developed with NestJS)

TECHNICAL SKILLS
Backend tools:
• Node.js, Express.js, NestJS, MongoDB, PostgreSQL, Redis, TypeORM, Mongoose
Backend practices:
• REST API design, raw SQL queries / repository pattern on plain PostgreSQL (no ORM), JWT / Basic / Bearer /
Session-cookie authentication, middleware & validation pipelines, Swagger/OpenAPI documentation, E2E testing,
Docker, Postman, AI-assisted development tools
Architecture & Patterns:
• OOP, SOLID, CQRS, DDD, IoC Container, monolithic architecture
Front-End (supplementary):
• React.js, JavaScript, TypeScript, HTML, CSS, Tailwind, Tanstack Query, React Query, Webpack, Next, Redux (Redux
Toolkit), React Router, React Hook Form, Vite, Zod, Tanstack Router, Yup, NPM, Yarn

PROFESSIONAL EXPERIENCE
Backend Developer — Node.js / NestJS | Jun 2025 – Sep 2026
MagnificSoft | Lviv, UA
Project 1 — Task Management API (Express.js, ~1 month)
• Built and maintained CRUD endpoints for task creation, retrieval, updates, and deletion
Project 2 — Pizzeria Ordering Platform (Express.js, ~4-5 months)
• Implemented CRUD operations and request validation for menu, order, and customer data
• Built admin-panel components with custom middleware for creating, editing, and updating menu positions
• Developed promotional/discount campaign logic and automated email delivery for confirmation codes and password-
reset flows
Project 3 — Content/Information Platform (NestJS, ~9-10 months)
• Built admin-panel functionality for creating, editing, deleting, and filtering platform content
• Implemented a comment system on posts/blogs, including likes on both comments and posts
• Ensured multi-device compatibility across the platform
Cross-Project Backend Engineering

• Implemented authentication/authorization using Basic Auth, Bearer JWT, and session cookies across monolithic
application architectures
• Applied middleware and validation layers consistently across all three projects
• Used NestJS pipes, guards, configuration modules, and Swagger for API documentation
• Worked with MongoDB and Redis via Mongoose; used TypeORM for PostgreSQL as well as raw SQL
queries/repository-pattern access to PostgreSQL without an ORM
• Wrote E2E tests; used Docker for containerization and Postman for API testing
• Applied OOP, SOLID, CQRS, DDD, and IoC container patterns in application design

React Developer | May 2024 – Jun 2025
GOLD dev | Lviv, UA
UI Components Designing & Application Interface Coding
• Identified web-based user interactions and developed highly-responsive user interface components via React concepts
• Translated designs & wireframes into high-quality code and wrote application interface code via JavaScript following
React.js workflows
• Created features to enhance the user experience while ensuring the web design is optimized for smartphones
Coding & Website Improvement
• Troubleshot interface software and debugged application code to improve functionality and performance
• Developed and implemented front-end architecture to support UI concepts with 100% accuracy
Application Development & UI Designing
• Reviewed application requirements and interface designs to ensure compatibility with existing applications