Андрій

Andrii Nikitiuk Junior Backend Engineer
[open contact info](look above in the "contact info" section) [open contact info](look above in the "contact info" section) Kyiv, Ukraine

[open contact info](look above in the "contact info" section) github.com/wReykk

SUMMARY PROJECTS
Backend Engineer specializing in TypeScript and Calorita — Fitness & Nutrition Tracker
Node.js ecosystems. Experienced in architecting TypeScript, Node.js, Express.js, PostgreSQL,
secure RESTful APIs and designing optimized Prisma ORM, JWT, Tailwind CSS
database schemas across both relational 06/2026 – Present
(PostgreSQL, Prisma) and NoSQL (MongoDB)
Architected a scalable full-stack nutrition
environments. Passionate about writing clean, type-
•

tracker with strict end-to-end type safety
safe code and eager to build scalable, high-
using TypeScript, ensuring high code
performance systems for complex product
reliability.
applications.
Designed a layered backend architecture,
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cleanly separating business logic from data
LANGUAGES access for better maintainability and code
reuse.
Ukrainian — Native Engineered a normalized PostgreSQL database
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schema via Prisma ORM to efficiently manage
English — Fluent complex entities like daily dietary logs,
weight histories, and user profiles.
Developed custom Express middleware for
EDUCATION •

centralized error handling and stateless
126.01 Integrated information systems JWT-based user authentication.
Built a responsive, modern frontend
National Technical University of Ukraine 'Kyiv •

interface using Tailwind CSS, focusing on
Polytechnic Institute'
intuitive data visualization and clean UI
09/2024 – Present | Kyiv, Ukraine layouts.

YelpCamp — Campground Review Platform
SKILLS
JavaScript, Node.js, Express.js, MongoDB,
Languages: Mongoose, Passport.js, Bootstrap
TypeScript, JavaScript (ES6+), Java (Basic) 04/2026 – 05/2026
Built a responsive full-stack platform
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Backend: enabling users to discover, create, and
Node.js, Express.js, RESTful API design, interact with a global database of
Middleware architecture, JWT campgrounds.
Designed a NoSQL database architecture using
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Databases: MongoDB and Mongoose, efficiently handling
PostgreSQL, MongoDB, Prisma ORM, Mongoose complex document relationships between
users, listings, and nested reviews.
Frontend: Implemented secure local authentication and
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HTML5, CSS3, Tailwind CSS, React.js, Bootstrap session-based authorization using
Passport.js to protect private routes and
Tools: user data.
Git, GitHub, Postman, Docker, npm/yarn Engineered robust RESTful APIs to process
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complex user interactions and manage core
Cloud & Deployment: application entities.
Vercel, Render, Neon (Serverless Postgres) Enforced comprehensive data validation on
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both client and server sides to guarantee
Concepts & Architecture: data integrity and prevent common
RESTful API, CORS, JWT, MVC vulnerabilities.