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AlehSitsko/README.md

Aleh Sitsko

Full Stack Developer · Philadelphia, PA

I build workflow-driven web applications and internal tools, drawing on several years in EMS dispatch and operations management. Looking for a Junior / Associate Full Stack role where I can grow on a team.

Portfolio · LinkedIn · GitHub · Email

Python Flask JavaScript React PostgreSQL Docker


About

Before moving into software, I worked in EMS dispatch and operations management — coordinating crews, schedules, and time-sensitive information under real operational pressure. That work taught me how structured processes, reliability, and clear information flow make or break a team.

I bring that perspective to development: I design software around real workflow problems rather than generic interfaces. My focus is internal tools, structured data entry, dashboards, and scheduling/dispatch systems. I completed the IBM Full Stack Software Developer certificate and build projects end to end — and I’m looking for a role where I can contribute to and learn from a full development team.


Featured Project — EMS Workflow System

A substantial portfolio project: an EMS/NEMT operations platform built from firsthand dispatch and operations experience, engineered with a production-style architecture.

Key engineering

  • Multi-tenant architecture with organization-scoped access and role-based authorization
  • Authenticated field-level encryption (AES-256-GCM) with organization-scoped key management for sensitive data
  • Realtime updates via Server-Sent Events, fanned across workers with Redis
  • Containerized deployment: PostgreSQL, Redis, Gunicorn, and Nginx (Docker) — plus a standalone, offline-capable Windows desktop build (Electron + SQLite)
  • Automated testing (pytest, Vitest, Playwright) with CI that applies database migrations and runs a full-stack smoke test on every push
  • Workflow modules: call intake, live dispatch board, operational calendar & scheduling, crew planning, fleet, HR/time/payroll, tasks, notifications, and audit logging

Stack: React · Flask · Python · SQLAlchemy · PostgreSQL · Redis · Docker · Nginx · Electron

Windows release · Case study · Repository

Portfolio project — not intended for real medical use and not to be used with real patient data.


Other Projects

Nexvora Group Website — Responsive business website for a wholesale/e-commerce company: service sections, contact structure, and a mobile-friendly layout. Stack: React · Vite · JavaScript · CSS · Vercel Live demo · Repository

Call Taking Form (React) — An early frontend EMS call-intake prototype; its workflow concepts later grew into the EMS Workflow System. Stack: React · Vite · JavaScript · Bootstrap · localStorage Live demo · Repository


Tech Stack

  • Frontend: React, JavaScript (ES6+), HTML5, CSS, Bootstrap, Vite, React Router
  • Backend: Python, Flask, REST APIs, SQLAlchemy, session authentication, CSRF, role-based access
  • Data & Infrastructure: PostgreSQL, SQLite, Alembic migrations, Redis, Docker, Nginx, Gunicorn
  • Testing & Quality: pytest, Vitest, Playwright, GitHub Actions, Git, Postman

Certification

IBM Full Stack Software Developer Professional Certificate — Coursera / IBM Skills Network, 2026 View credential


Contact

Portfolio · LinkedIn · GitHub · Email

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  1. Call-Taking-Form-React Call-Taking-Form-React Public

    JavaScript

  2. ems-workflow-system ems-workflow-system Public

    Multi-tenant EMS/NEMT operations platform (React + Flask): field-level encryption, realtime via Redis/SSE, PostgreSQL·Redis·Docker·Nginx, plus an offline Windows desktop build (Electron). Portfolio…

    JavaScript 1