Hi, I'm Joel
Making software & solving problems
Senior Full-Stack Engineer with several years of experience as Product Owner and Technical Lead.
Founder, Full-Stack Developer & Technical Lead
My passion for software development began as early as age 12, with Java. At 18 I registered my first business, spent a total of 7 years freelancing as a software developer, and worked several years as a Technical Lead.
Today I have broad experience delivering a wide range of projects, from small applications to complex software solutions. AI isn't a future vision for me, it's a solid part of my everyday work. I work in an agile, pragmatic way with a strong hands-on mentality.
I currently work as a Senior Software Engineer at maxcluster, a team.blue company. There I build control & management software for more than 6,000 servers, develop modern interfaces, migrate legacy code bases to TypeScript, and support the team in using AI in development.
On top of that, I run my own start-up, Lokale Momente, a self-built experience and ticketing platform connecting people with local experiences.
Selected work
Bionatic Group
As Technical Lead, I was responsible for system and architecture decisions across the entire Bionatic Group: I introduced Shopify as an additional shop system, developed and managed existing Shopware 6 shops, built interfaces and developed market-ready SaaS platforms that Bionatic sells today.
maxcluster / team.blue
As a Senior Software Engineer, I develop control and management software for over 6,000 Linux servers, build modern REST interfaces with TypeScript and migrate legacy code bases to it. I also support the team in adopting and using Claude Code, Copilot and Devin.
Lokale Momente
A cross-regional event and ticketing platform with a multi-tenant marketplace: over 200 providers, more than 350 permanently bookable listings. I built the storefront, admin dashboard and mobile app for iOS and Android as a solo developer and run them in production today.
E-Connect Interface
An intelligent e-commerce interface I built that keeps over 8,000 SKUs in sync daily between ERP, online shops, marketplaces and logistics at Bionatic. As a business-critical component, I designed it from the ground up for reliability and fault tolerance.
bewerbungen.app
A SaaS product born out of my own need: it simplifies creating and managing job applications. AI recognizes the job automatically, calculates a match score and generates a cover letter and CV ready to send, editable directly in the inline editor.
EasyDAM
A tool for central media management, born out of the Bionatic Group's own need. AI pipelines handle analysis, tagging and categorization automatically, while media pipelines convert, compress and crop images, videos and documents.
foodsta
An all-in-one platform for food-service businesses: a digital ordering service without commissions that automatically provides restaurants with their own web shop for delivery and pickup, including menu import and payment processing. I sold foodsta in 2022.
NORTHPOL
A SaaS product for integrated CO2 offsetting at online shop checkouts, connected to Shopware, Shopify and, via a snippet integration, virtually any other web shop. The CO2 value is calculated dynamically based on the items in the cart, without collecting any customer or order data.
PrintUcan
A Shopify-based web shop for Greenbox GmbH & Co. KG: individually printable take-away packaging, including automatic print-data processing and integration with ERP and print partners. Built in-house from concept to go-live within a few weeks.
Skills & Technologies
Frontend
Backend & Infra
Cloud & DevOps
E-Commerce
AI & Automation
AI Development
APIs & Communication
Testing & Quality
Methods & Workflow
Just say hello.
Feel free to reach out — I'll get back to you quickly.