Mustafa Keleşoğlu · Web Developer
I build fast, responsive websites and custom web applications for companies, associations and digital projects, using WordPress, Elementor and modern full-stack technologies.
Based in Dinslaken, Germany · Projects in NRW and remote
Selected work
Real projects with a clearly stated role, technology and status. No demos.
Collect, organise and find links and content from across the web.
SaveFold is a web application for saving, categorising, searching and managing useful links and shared content from websites, YouTube, X/Twitter, Instagram and other sources. It is my main full-stack product project and is currently in technical beta.
Deterministic analysis of authority changes for AI agents defined in repositories.
AuthorityLab is a security research and product development project. It is designed to analyse which authority an AI agent configured inside a repository holds, how that authority shifts when the configuration changes, and whether a change should be allowed, modified or blocked. The project is in its validation phase.
Corporate website for a service company with several business areas.
Client website for PV Solar GmbH, a Duisburg-based company offering photovoltaic and electrical installations, industrial hall construction and assembly, logistics and IT services. The site presents every business area in a clear structure and leads prospects to a project request.
Restaurant website with a product catalogue and a WhatsApp ordering path.
Website for BestFood, a restaurant in Chur (Switzerland) serving homemade burgers, gözleme, wraps, plate dishes and more. Guests browse the menu as a product catalogue, pick their dish and order conveniently via WhatsApp.
Services
From a business website to a custom web application. Everything responsive, maintainable and built with security in mind.
How I work
A short conversation about goal, audience, content and budget. You get an honest assessment of what makes sense and what does not.
Site structure, technology decision (WordPress or a custom application), timeline and a clear scope. No surprises.
Development in traceable steps with interim versions you can check in your browser.
Responsive tests, forms, security basics and a short briefing so you can maintain the site yourself.
The difference
I come at the web not only from design but also from the systems side: SOC, SIEM, log analysis and system security are part of my ongoing practice. That changes how I build websites and applications.
What I do not offer: professional penetration testing. What you get: a website that avoids the typical mistakes from the start.
Password hashing, session protection and roles instead of "one admin for everything".
Every input is checked and normalised on the server, including forms on WordPress sites.
Content Security Policy, HTTPS, secure cookies and no secrets in frontend code.
Sensible logging without personal data, so problems can be found without creating new risks.
Skills
Describe briefly what you have in mind. I usually reply within a few working days, in English, German or Turkish.