How We Can Help Individual Founders
From Your Idea to a Working Prototype
You know your field and see a problem that software could solve, but you are unsure where to start?
We help individual founders and domain experts test their ideas and build working prototypes. You work directly with experienced engineers, even before having founded a company.
Dr. Philip Heltweg
Dr. Georg Schwarz
What We Can Help You With
- Discuss technical feasibility and the risks in your idea
- Choose a focused first prototype to test with potential users
- Build a prototype around your domain knowledge
- Review and improve a vibe-coded prototype
- Choose tools and estimate the technical work ahead
- Plan the next steps towards a product
- Evaluate freelancers or a potential technical co-founder
How to Start
Book a free intro call or send us a short description of your idea by email. If you have a sketch or prototype, share it too. We will discuss where you are and whether paid technical support makes sense for your next step. No commitment required.
About isselthal
isselthal is a small engineering firm run by experienced engineers who are founders themselves. We work with domain experts and non-technical founders, from the first whiteboard sketch to running systems. You bring your knowledge of the problem; we help you explore the technical options and build.
Direct Technical Contact
You talk to the engineers who do the work. We can explain technical decisions without expecting you to have an engineering background.
Start With the Core Idea
We focus on the part of your idea that needs testing first. You do not need a detailed specification or a finished business plan to start a conversation.
Keep Your Options Open
We help you understand what your prototype needs next, whether you continue with us, hire someone, or find a technical co-founder.
Who We Are

Dr. Philip Heltweg
Product-Minded Engineer
Product-minded engineer with experience as a professional software engineer, technical product manager, and researcher in software engineering and data management. Philip helps teams connect complex technical work with practical product goals.
https://heltweg.org
Dr. Georg Schwarz
Infrastructure Engineer
Infrastructure engineer with extensive experience building and running reliable software systems. Georg manages deployments and cloud platforms, and combines full-stack engineering with experience in research experiments and research software.
https://georg-schwarz.comTalk to Us
We will listen to where you are, what decisions you are facing, and whether we are a good fit. No commitment required.