Aleksandra Poturalska

Backend Engineer focused on building robust, scalable, and secure systems.

The Engineer Behind the Code

I’m a backend developer with a strong focus on building secure, reliable systems. I care deeply about how data moves, how it’s protected, and how to design systems that are both fast and trustworthy. I’m always learning, always refining, and driven by the belief that great engineering is equal parts precision and curiosity. Right now, I’m building tools that prioritize privacy by default—and pushing myself to raise the bar with every project.

My Approach

  • Security-First Development
  • Clean Architecture & Design
  • Performance Optimization

Technologies & Tools

A selection of the languages, frameworks, and tools I use to bring ideas to life.

  • Languages

    Go, Python, JavaScript, SQL, HTML, CSS

  • Frameworks

    Django, Flask, Gin, Chi

  • Backend

    REST APIs, WebSockets, SQLC, GraphQL, gRPC

  • Databases

    PostgreSQL, SQLite, MongoDB, Redis

  • Security

    JWT, AES-GCM, RSA-OAEP, ECDSA, PBKDF2, HTTPS, CORS, Secure Cookies, Rate Limiting

  • DevOps & Deployment

    Docker, NGINX, GCP (VMs, IAM), GitHub Actions, Terraform, TLS/Let's Encrypt, Linux VPS

  • Tools

    Git, Postman/Insomnia, Make, Swagger, Prometheus, Grafana

  • Testing

    Unit Testing (Pytest), E2E Testing, API Testing, Load Testing (Locust)

Featured Projects

A deep dive into my most impactful work, showcasing the technical depth and innovation behind each project.

FileThere Dashboard

FileThere

(PROJECT 1)

Engineered FileThere, a secure, cross-platform file-sharing platform designed for teams handling confidential documents. Implemented end-to-end encryption with military-grade protocols, real-time collaboration features, and zero-trust architecture principles. The platform ensures data privacy through AES-GCM encryption, secure key exchange, and tamper-evident audit trails, making it suitable for organizations requiring compliance with data protection regulations.

Go PostgreSQL Redis WebSocket AES-GCM

Zero-Trust Architecture

End-to-end encryption with military-grade protocols

Cross-Platform

Native support for macOS, Linux, and Windows

Real-time Collaboration

Instant file sharing with presence detection

Read about the cryptography behind FileThere

Deep dive into the security details on Medium

Read Series

AuditTrail

(PROJECT 2)

Designed and implemented AuditTrail, a SOC2-compliant, tamper-proof audit logging system engineered for enterprise-grade security and compliance. The platform features cryptographically signed logs, granular access controls, and JWT-based authentication, ensuring data integrity and regulatory compliance. Built scalable asynchronous logging pipelines using Celery and Redis, optimized for high-volume production environments. Integrated comprehensive monitoring with Prometheus and Grafana for real-time metrics, anomaly detection, and automated alerting. Implemented secure export workflows supporting multiple formats and automated log archival, making it ideal for organizations requiring strict audit trail compliance with various security regulations.

Django MongoDB Redis Celery JWT

Zero-Trust Security

Cryptographically signed logs with verification

High Performance

Asynchronous processing with retry mechanisms

Advanced Querying

MongoDB-powered filtering and export

Explore the Code

Check out the implementation details and documentation

View on GitHub

NutriScan

In Development
(PROJECT 3)

Currently developing NutriScan, an intelligent application that revolutionizes consumer product analysis through advanced OCR and machine learning. The platform enables users to instantly decode complex product labels, providing comprehensive nutritional insights and ingredient analysis. Building with a focus on accuracy and user privacy, NutriScan processes product information locally when possible and implements secure cloud processing for complex analyses. The system features real-time label recognition, detailed nutritional breakdowns, and personalized health recommendations, making it an essential tool for health-conscious consumers and dietary professionals.

Flask SQLAlchemy JWT Google Vision API Flask-Migrate

Secure Authentication

JWT-based user authentication with secure session management

Label Analysis

Advanced OCR processing with Google Vision API for accurate text extraction

Data Management

Robust database architecture with SQLAlchemy ORM and migration support

E-commerce API

(PROJECT 4)

Architected a comprehensive E-commerce API platform with a focus on security, scalability, and developer experience. Implemented secure payment processing through Stripe integration with robust error handling and transaction management. Developed an advanced product management system with sophisticated filtering, real-time inventory tracking, and automated price updates. Built a flexible order management system supporting multiple shipping methods, tax calculations, and automated fulfillment workflows. The platform features comprehensive admin controls with role-based access, detailed analytics, and automated reporting capabilities.

Flask SQLAlchemy JWT Stripe Marshmallow

Secure Payments

Integrated Stripe payment processing with robust error handling

Advanced Search

Sophisticated product filtering with category and price range

Admin Controls

Comprehensive admin panel with role-based access

Explore the Code

Check out the implementation details and documentation

View on GitHub

Expense Tracker API

(PROJECT 5)

Engineered a robust Expense Tracker API designed for enterprise-grade financial management and compliance. Implemented secure JWT-based authentication with advanced token management and role-based access controls. Developed sophisticated expense categorization and analysis features with support for multiple currencies, tax calculations, and automated receipt processing. Built comprehensive reporting capabilities with customizable dashboards, period-based analytics, and automated financial insights. The platform includes advanced data export features, audit logging, and integration capabilities with popular accounting software.

Flask Flask-Smorest SQLAlchemy JWT Marshmallow

Secure Authentication

JWT-based authentication with secure password hashing

Smart Analytics

Comprehensive expense summaries with period-based filtering

API Documentation

Interactive Swagger UI documentation for seamless integration

Explore the Code

Check out the implementation details and documentation

View on GitHub

Let's Connect

Have a project in mind? Feel free to reach out through any of the platforms below.