---
title: "Tech stack - Roee Sivan"
description: "64 technologies grouped by purpose, mapped to projects"
canonical: "https://roeesivan.com/stack"
last-updated: "2026-08-27"
---

# Tech stack

64 technologies, grouped by what they are for rather than by language.

## By purpose

### Languages

What I actually write day to day.

- TypeScript
- JavaScript
- C#
- Python
- Java
- C
- SQL
- HTML
- CSS / SCSS
- GLSL

### Real-time 3D & games

Engines, renderers and physics used to ship playable builds.

- Unity 6
- Three.js
- WebGL
- Rapier physics
- Canvas 2D
- glTF / GLB
- Blender
- Web Audio API
- WebAssembly

### Web & full stack

Frameworks and services behind the production sites.

- Next.js 16
- React 19
- App Router
- Tailwind CSS
- SCSS Modules
- Node.js
- .NET
- Vite
- REST APIs
- Server-Sent Events

### Data & backend

Persistence, auth and the services around them.

- PostgreSQL
- Prisma
- Supabase
- SQLite
- OAuth 2.0
- JWT / jose
- Resend

### AI & computer vision

Models and pipelines I have trained, hosted or called in anger.

- YOLOv8
- Ultralytics
- OpenCV
- EasyOCR
- MediaPipe
- Roboflow
- PyTorch
- Stable-Baselines3
- Gymnasium
- MuJoCo
- Reinforcement learning
- Genetic algorithms
- Neural networks
- NumPy
- Matplotlib
- Gemini API
- MCP

### Tooling & delivery

How the work gets built, checked and shipped.

- Git
- GitHub
- Vercel
- ESLint
- Prettier
- Vitest
- Playwright
- API testing
- Linux
- Bash
- Claude Code

## Skills from outside the projects

- Languages: Java, C, .NET
- Testing: API-level testing, Test automation, Manual QA
- Systems: Linux, Bash

## Everything, alphabetically

- .NET
- API testing
- App Router
- Bash
- Blender
- C
- C#
- CSS / SCSS
- Canvas 2D
- Claude Code
- ESLint
- EasyOCR
- GLSL
- Gemini API
- Genetic algorithms
- Git
- GitHub
- Gymnasium
- HTML
- JWT / jose
- Java
- JavaScript
- Linux
- MCP
- Matplotlib
- MediaPipe
- MuJoCo
- Neural networks
- Next.js 16
- Node.js
- NumPy
- OAuth 2.0
- OpenCV
- Playwright
- PostgreSQL
- Prettier
- Prisma
- PyTorch
- Python
- REST APIs
- Rapier physics
- React 19
- Reinforcement learning
- Resend
- Roboflow
- SCSS Modules
- SQL
- SQLite
- Server-Sent Events
- Stable-Baselines3
- Supabase
- Tailwind CSS
- Three.js
- TypeScript
- Ultralytics
- Unity 6
- Vercel
- Vite
- Vitest
- Web Audio API
- WebAssembly
- WebGL
- YOLOv8
- glTF / GLB