Utku Gaspak

Backend & full-stack developer.
Mechanical engineering background.
APIs, backend services, full-stack web applications. I manage software development from idea to deployment.

Available now

For Full‑Stack and backend roles
DE/EN fluent

Projects

>Traxr

GitHub traxr.xyz

Full-stack job search workflow tool with integrated job scraper.

Built to replace spreadsheets during my own job search.

ASP.NET Core · C# · PostgreSQL · React · TypeScript · Docker

Deployed via Docker Compose on Hetzner Ubuntu VPS with Caddy reverse proxy and custom domain traxr.xyz
JWT authentication with ASP.NET Core middleware
70 automated tests with xUnit, Moq, FluentAssertions (backend) · Vitest, React Testing Library, MSW (frontend)
Scout integration: pydoll CDP scraper feeding a swipe-based job evaluation UI with direct company apply links

>Tolerance Stackup Analyser

GitHub tolstackup.com

Engineering tool that calculates how manufacturing tolerances stack up.

Built from mechanical engineering practice. Used by engineers who found it organically.

Next.js · React · TypeScript · Vitest

Pure TypeScript calculation engine — three methods: Worst Case, RSS, Monte Carlo simulation
Full Vitest coverage on calculation logic with documented validation cases in README
Organic traffic from mechanical engineering community — no advertising

>hiring-cafe-scout

GitHub

CLI scraper that searches hiring.cafe with exact keyword filters.

Built because LinkedIn's keyword matching is broken for specific tech stacks like .NET and C#.

Python · pydoll · CDP · CLI

Cloudflare bypass via pydoll and Chrome DevTools Protocol: native browser requests, not WebDriver
Preset system, deduplication across runs, JSON and Markdown export with direct company apply links
Feeds directly into traxr.xyz Scout section via JSON upload for swipe-based job evaluation

Skills

Frontend

React, TypeScript, Next.js, Tailwind CSS

Backend

C#, ASP.NET Core, Entity Framework Core, Java, Spring Boot, FastAPI, PostgreSQL, Python

DevOps

Docker, Linux VPS, Git, GitHub Actions