Yahya Yildiz

Software Engineer · Rotterdam, NL

[email protected] · linkedin.com/in/yahyayildiz · github.com/spronu

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Profile

BSc Computer Science graduate, Hogeschool Rotterdam (Jul 2026). Full stack web developer who combines attention to user experience with a security-first engineering mindset: secure defaults, least privilege, careful input handling, dependencies at arm's length. I aim to ship software that ages well and behaves predictably in production.

Skills

Languages
Python, C#, JavaScript, TypeScript, MySQL, HTML, CSS, PHP
Tools
Docker, Git, GitHub, VSCode, Figma, Vercel, Bitbucket, Jira, Trello, Slack
Frameworks
ASP.NET, ReactJS, NextJS, Jest, Pytest, Laravel
Theory
Operating System, Concurrency, Data Structures and Algorithms, Advanced OS, Databases, OODP

Trajectory

  1. Feb 2026 → Jul 2026
    Graduation Internship · Software Developer
    Bond for Web Solutions, Rotterdam
  2. Sep 2024 → Jan 2025
    Full Stack Developer Internship
    ThePerfectWedding.nl / Weblab.nl, Rotterdam
  3. Aug 2022 → Jul 2026
    BSc Computer Science
    Hogeschool Rotterdam
    Graduated · thesis defense 9/10
  4. 2020 → 2022
    IT Administrator
    Elaborate, Gouda
  5. 2018 → 2019
    IT Technician
    Smartline Computers, Rotterdam
  6. 2017 → 2022
    MBO Niveau 2, 3, 4 IT
    Techniek College Rotterdam

Selected work

GSG Performance

Dec 2025 → present

Full Stack Engineer with DevOps

Migrated a legacy PHP codebase to a modern Next.js plus Payload stack and shipped it solo. Owned the design, the build, the deploy, and the keep-it-alive.

Next.js 16 · Payload CMS · Self hosted · CSP · Rate limiting · https://gsgperformance.com

GSG Automotive

Apr 2026 → present

Full Stack Engineer with DevOps

End to end work for a Rotterdam workshop. Self hosted Payload so the client owns their data, not a SaaS. HTTPS, secure headers, image optimisation, structured data.

Next.js · Payload CMS · Self hosted · DevOps · https://gsgautomotive.nl

Stercars, Rotterdam

2024

Full Stack Engineer with DevOps

Quiet typography, tuned motion, premium feel without sacrificing performance. EN and NL bilingual content modelled cleanly with Payload localisation.

Next.js · Payload CMS · EN / NL · Lighthouse tuned · https://stercars.com

Internal Production Hub

Feb 2026 → Jul 2026

Graduation Internship at Bond for Web Solutions

Replaced scattered hardcoded SharePoint links with a hardened, role aware content hub. Provider agnostic file access, server side filtering, AES-256-CBC plus HMAC-SHA256 (encrypt then MAC, machine bound key derivation, constant time verified).

AES-256-CBC + HMAC-SHA256 · encrypt-then-MAC · Machine bound · constant time verified

ASP.NET · C# · Microsoft Graph · OAuth 2.0 · AES-256 · RBAC · Audit logged

Also

  • FinBud, Financial Buddy — Casual group project. React Native + Expo prototype walking users step by step through applying for financial arrangements. Lived in a test environment, never shipped publicly.
    React Native · Expo · TypeScript · i18n · Google Cloud TTS · https://github.com/dsi-sem6/frondendSEM6
  • Onboarding App for Antes GGZ — A mobile application for onboarding new employees at Antes GGZ.
    Next.js · TypeScript · Vercel · NextAuth · https://github.com/spronu/ProjectC
  • Restaurant Console Application — A console application for managing a restaurant.
    C# · Console App · https://github.com/spronu/RestaurantGroep4