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A Software Engineer

Yahya Haji

Based in the Black ForestFull‑stack • Art • Simulations

Hey, I’m Yahya Haji.
I build full‑stack products and play with systems that feel alive.

I love turning ideas into code—but I’m not here to worship the terminal. I’m here for clarity, craft, and momentum.

Off‑screen, I hike, read, take photos, and keep a playlist running—usually Kendrick or Hozier. Lately I’ve been leaning into art and simulation through code—little worlds, rules, emergence.

PhotosReadingGenerative ArtSpotify playlist

P.S. If you’ve seen Andor, we’ll get along.

RIGHT NOW
Generative Art • 1/4
Simulations × Generative art
Code as a sketchbook—particles, constraints, tiny rules that create surprising outcomes.
Explore Simulations

P.S. Andor really is that good.

Stack

Built to ship. Designed to last.

Main frontend: Next.js/React. Main backend: Spring Boot in Kotlin/Java.

“Jack of all trades, master of none — but often better than a master of one.”

Explore
Hover a chip to preview what I use it for.

UI/UX

Next.js-first interfaces. Fast, crisp, accessible.

My default for product UI: Next.js + React with Tailwind and shadcn/ui.

Next.jsReactTypeScriptTailwind CSSshadcn/ui
Primary focus
Next.js / React
Spring Boot (Kotlin/Java)
How I work
  • Strong defaults: types, tests, and sensible boundaries.
  • Build fast, then harden: observability, security, and DX.
  • Right tool for the job across UI, backend, data, and infra.

Selected work

Projects I’ve built

Clean builds, practical features, and stacks that fit the problem.

Ash

Interpreted language (Lox-inspired)

A Lox-inspired interpreted language built from scratch with parsing and AST-based evaluation to understand interpreters end-to-end.
  • REPL for quick experiments
  • Functions, control flow, expressions
  • Classes/objects + runtime error reporting

Stack

ParsingASTInterpreters
View repo
Reading Realm

Social reading + book tracking

A community reading platform to track books, share reviews, set goals, and manage eBooks—built as my bachelor’s capstone.
  • Ratings, reviews, goals, and tracking
  • eBook upload/storage with AWS S3
  • Notifications via Firebase Cloud Messaging

Stack

View repo
AskMe

Notes → AI Q&A study sets

A mobile app that turns uploaded notes into Q&A using Gemini and OpenAI—then lets you review saved sets offline.
  • AI Q&A generation from uploads (API-based)
  • Offline access to saved study sets
  • Bring-your-own API keys for privacy/control

Stack

View repo

Have an idea worth shipping?

The next project may be yours...

Get in touch
Open to collabs

Let’s build something that actually ships.

Feel free to reach out for collaborations, questions, or just to say hi.

LinkedIn
linkedin.com/in/yahya-haji
GitHub
github.com/yahyafati
Email
yahyahaji40@gmail.com
Phone
+49 15510375495
Prefer email? Cool. Prefer carrier pigeon? Less cool, but negotiable.

No drama. No cards. Just vibes and valid HTML.