ByteScript | Frank Köhler – Fullstack Developer PHP, Python, React

About ByteScript

As a fullstack developer with over 8 years of professional experience, I offer tailor-made software solutions for companies of all sizes. With two completed vocational qualifications as an IT Specialist – Application Development and System Integration – and an instructor's license (AdA), I bring both technical depth and experience in team leadership and knowledge transfer.

Whether it's custom web development, API integration, or optimizing existing systems – the focus is on clean code, comprehensible architectures, and reliable delivery.

Currently Available

My Principles

Clean & Sustainable Code

Clear, documented, and maintainable code is not an option – it's a foundation. Code reviews, pair programming, and regular refactoring ensure long-term quality.

Customer-Centric Development

Agile methods like Scrum and Kanban enable quick responses to changing requirements. Regular feedback ensures the result matches actual needs.

Quality & Security

Data security and privacy are core principles – not afterthoughts. Legal requirements are taken into account from the very beginning.

Projects

An overview of my work

Voennies-Wollust

Homepage

riefit

Therapy & Prevention GbR

BS Tools

Collection of useful web tools: image compression, password generator, IP calculation, DNS lookup, domain check, and more.

Symfony PHP

Ticket System

Custom ticket and support system with role-based access (Admin, Manager, User), rich-text editor, and file upload.

Symfony 7 PHP 8.2 MariaDB Tailwind

Kiosk Screen

Raspberry Pi with Linux as a kiosk system. Displays a video in a continuous loop — fully automatic, no user interaction required, autostart-capable.

Raspberry Pi Linux

Discord Badwords Bot

Monitors Discord servers and automatically filters unwanted words. Configurable word lists, logging, and moderation actions.

Python discord.py

KFV AB Crawler

Scrapes kfv-ab.de for courses and automatically sends an email when MTA courses or additional modules have available spots.

Python uv

Telegram News Bot

Automatically posts IT security news from RSS feeds (Golem, Heise, The Hacker News) to a Telegram channel. Runs via cron on Raspberry Pi.

Python Raspberry Pi

node

Automatically switches the active Node.js version when changing directories based on the .nvmrc file. No manual nvm use required.

ZSH nvm

testfiles

Quickly generates test images and videos using ImageMagick and FFmpeg. Automatically installs missing tools via package manager.

ZSH FFmpeg ImageMagick

About Me

Frank Köhler

IT Specialist – Application Development

IT Specialist – System Integration

Certified Trainer (AdA)

2016–2017

Department Head – Application & Systems Programming

Swiss Bionic Solutions: Developer and system administrator for a multinational team. Responsible for internal software solutions and system stability.
2017–2022

Tech Team Lead – rta.design GmbH

Started as a developer, rose to tech team lead. Built and led the development team, introduced agile processes, and trained junior developers with an instructor's license (AdA).
2022–present

Senior Developer – Campoint AG

Senior developer for Python, PHP, and React.js. Responsible for backend systems, API integrations, and technical architecture in an agile team.
today

Partner

ALL-INKL.COM - Webhosting Server Hosting Domain Provider

Technologies

Help & Support

Questions or issues? The ticket system can help.

For support requests, bug reports, or general questions, a dedicated ticket system is available. Simply create a ticket and I'll get back to you as soon as possible.

Create Ticket

Contact

Project inquiries and questions via email.

Interested in working together? I'm happy to receive inquiries about projects, freelance engagements, or technical consulting.

Send Email