Back‑End Developer

Building reliable APIs and automation systems with Node.js, TypeScript, SQL and Docker.

Back End Developer based in Germany, focused on performance, security, and scalability. Currently working as a Freelancer with real clients and gaining work experience, building production-ready projects such as SaaS core.

Node.js TypeScript SQL Docker MongoDB Jest
Andriy Tsar portrait
Projects
Automation • Node.js • MongoDB • JWT • Swagger • Jest

Smart Automator

Automation platform with custom triggers and actions, safe execution, validation and tests.

Swagger Documentation
Smart Automator Swagger preview
Automation Panel Overview, Telegram message test
Smart Automator interface and triggers overview
REST • Node.js • Express • MongoDB • JWT • Swagger

Task Manager API

Secure CRUD API with JWT authentication, input validation, and modular architecture.

Swagger Documentation
Task Manager Swagger preview
App Overview
Task Manager App overview
Blog • JWT • SendGrid • MongoDB • Swagger

Blog API

RESTful blog backend with email verification, role-based access and OpenAPI docs.

Swagger Docs
Blog API Swagger documentation preview
Blog CRUD Interface, create Post
Blog API CRUD and post management
Email Verification Flow
Blog API email verification workflow
Skills & Tools
JavaScript (ES6+) TypeScript Node.js Express SQL MongoDB Docker Git Jest Swagger / OpenAPI Auth & JWT REST APIs Currently : Working as a Freelancer • Building new projects • Expanding Full Stack skills
Contact

About

I'm a highly driven developer who constantly pushes to grow and refine my skills every single day. Ambitious, curious, and inventive. I love finding new approaches and smarter solutions. I believe in consistent progress, discipline, and hard work to achieve bold goals and build something meaningful.

My goal is to become a world-class developer who not only writes clean and efficient code, but also creates technologies that inspire and make a real impact. Every project I build is one step closer to that vision.