Portfolio

About

Learn more about me

Backend Engineer

Backend Engineer specializing in Python/Flask architectures and DevOps practices. Successfully deployed multiple Production-Grade Web applications using Docker containerization and Cloud Infrastructure. Experienced in implementing Secure Authentication systems and Configuring Production Environments with Nginx, including SSL/HTTPS implementation.

Experience: 3+ yrs
Freelance: Available
Degree: BS in Computer Science
GPA: 3.87 / 4.00

I'm particularly drawn to roles that allow me to leverage my full-stack capabilities while deepening my expertise in cloud architecture and infrastructure automation. I'm eager to apply my hands-on experience with complex system design to financial technology solutions that require both technical excellence and attention to security and reliability.

Lines of Code

Hours of Coding

Technologies

Independent Projects

Skills

Python80%

Flask65%

DevOps80%

Docker70%

Cloud Computing65%

HTML/CSS/JavaScript60%

RESTful API50%

Nginx70%

PostgreSQL65%

Backend Development75%

Interests

Algorithms

Data Structures

Coding Challenges

Ethical Hacking

Holistic Sys Architecture

Cloud Networking

Security Trends

DevOps

Network Security

Tech Meetups

AI System Integration

Cybersecurity

Technologies

Docker

Flask

Nginx

PostgreSQL

git

Python

.config

Resume

Check My Resume

Summary

Vlad Bortnik

Backend Engineer with a Computer Science degree, specializing in Production-Grade Flask applications and Cloud Infrastructure. Experienced in building secure, scalable systems with comprehensive DevOps implementation from development to deployment.

Github

Portfolio

NYC Metropolitan Area

Technical Skills

Languages & Frameworks

Flask
Python
HTML
CSS
JavaScript
Bootstrap

Databases & APIs

PostgreSQL
SQLite
SQLAlchemy
RESTful APIs
Azure Vision API
Spoonacular API

DevOps & Tools

Docker
Nginx
Git
Ubuntu/Linux
SSL/HTTPS
DigitalOcean

Experience

BACKEND ENGINEER | Independent Projects | New York, NY

Architected and maintained production infrastructure hosting multiple Flask applications, focusing on security,
scalability, and cloud deployment.

Designed multi-application server architecture with A+ rated security implementations
Implemented comprehensive DevOps practices using Docker, Nginx, and DigitalOcean
Developed and deployed full-stack applications with external API integrations and user authentication
Orchestrated routing system managing distinct applications across multiple subdomains

Feb 2022 - Present

Featured Projects

PRODUCTION-GRADE MULTI-APPLICATION SERVER

Robust server infrastructure with load balancing, security layers, and containerized applications.

Configured Nginx as reverse proxy with load balancing and caching for optimal performance
Implemented comprehensive security layers: UFW firewall, fail2ban, SSL/TLS (A+), Security Headers (A+)
Orchestrated routing system managing three distinct applications across multiple subdomains
Established secure communication channels for external API integrations (Azure Vision, Spoonacular)
Maintained production environment, hosting Docker containerized Flask applications with SQLite/PostgreSQL

Architecture

Tech Stack

Nginx
Docker
SSL/TLS
DNS
Load Balancer
Security Headers
DigitalOcean

RECIPE WEB APP

Full-stack Flask App integrating Azure Vision API for ingredient recognition and Spoonacular API for recipe generation.

Implemented comprehensive user system with secure authentication, password hashing (Bcrypt), and CSRF protection
Designed PostgreSQL database schema with SQLAlchemy ORM, implementing automated migrations for version control
Containerized application using Docker Compose, orchestrating web service and PostgreSQL database deployment
Configured Gunicorn WSGI server for concurrent request handling and production-grade performance

Github Live

Tech Stack

Flask
PostgreSQL
Docker
Gunicorn
Azure Vision API
Spoonacular API

STUDENT BOOK EXCHANGE PLATFORM

Full-stack marketplace application using Flask/Gunicorn and SQLite for student textbook exchange.

Implemented comprehensive user system with secure authentication (Flask-Login) and password encryption (Bcrypt)
Created CRUD functionality for book listings with image upload capability and form validation (Flask-WTF)
Containerized application using Docker Compose and deployed with Nginx reverse proxy on DigitalOcean
Designed responsive UI with Bootstrap and Jinja2 templating for optimal user experience

Github Live

Tech Stack

Flask
SQLite
SQLAlchemy
Docker
Bootstrap
Jinja2

PROFESSIONAL PORTFOLIO WEBSITE

Adapted professional HTML template to create personalized portfolio website.

Code modified: HTML 75%, CSS 80%, JavaScript 65%
Modified existing CSS styles and JavaScript functionality to match requirements
Customized content structure and layout for optimal presentation of projects
Maintained clean, organized codebase using modern HTML5 and CSS3 standards

Github Live

Tech Stack

HTML5
CSS3
SCSS
JavaScript
Bootstrap

Education

BROOKLYN COLLEGE | City University of New York

Bachelor of Science in Computer Science | GPA: 3.87 / 4.00

Jan 2017 - Dec 2019

My Works

PROJECT #1

PRODUCTION-GRADE MULTI-APPLICATION SERVER

Robust server infrastructure with load balancing, security layers, and containerized applications.

Overview

Configured Nginx as reverse proxy with load balancing and caching for optimal performance
Implemented comprehensive security layers: UFW firewall, fail2ban, SSL/TLS (A+), Security Headers (A+)
Orchestrated routing system managing three distinct applications across multiple subdomains
Established secure communication channels for external API integrations (Azure Vision, Spoonacular)
Maintained production environment, hosting Docker containerized Flask applications with SQLite/PostgreSQL

Tech Stack

Nginx
Docker
DNS

Let's Encrypt
SSL / TLS
DigitalOcean

Load Balancer
Security Headers
Server Blocks

Reverse Proxy
Subdomains
UFW & fail2ban

Architecture && Details

View Full Details

PROJECT #2

RECIPE WEB APP

Full-stack Flask App integrating Azure Vision API for ingredient recognition and Spoonacular API for recipe generation.

Overview

Implemented comprehensive user system with secure authentication, password hashing (Bcrypt), and CSRF protection
Designed PostgreSQL database schema with SQLAlchemy ORM, implementing automated migrations for version control
Containerized application using Docker Compose, orchestrating web service and PostgreSQL database deployment
Configured Gunicorn WSGI server for concurrent request handling and production-grade performance

Tech Stack

Flask
PostgreSQL
Docker

Gunicorn
Azure Vision API
Spoonacular API

Load Balancer (Docker)
Security Headers
Server Blocks

Script Automation
Network Segregation
CSRF Protection

Screenshots && Details

GitHub Live

PROJECT #3

STUDENT BOOK EXCHANGE PLATFORM

Full-stack marketplace application using Flask/Gunicorn and SQLite for student textbook exchange.

Overview

Implemented comprehensive user system with secure authentication (Flask-Login) and password encryption (Bcrypt)
Created CRUD functionality for book listings with image upload capability and form validation (Flask-WTF)
Containerized application using Docker Compose and deployed with Nginx reverse proxy on DigitalOcean
Designed responsive UI with Bootstrap and Jinja2 templating for optimal user experience