About DuoByte
DuoByte is a software company from Morsbach in North Rhine-Westphalia, founded in 2024 by Robin Hopp and Daniel Ruppin. We build web applications, portals and integrations for businesses across Germany and write the code ourselves.
Our standard
DuoByte was founded in 2024 around a simple belief: great software emerges where technical depth, product thinking and a real understanding of operations meet.
That is why there are no hand-offs between sales, project management and development. You talk to the two founders who design, build and launch your system. The code belongs to you, is documented and can be continued by any capable team.
The founders
No sales team and no project manager in between. You work with us directly, from the first conversation to day-to-day operation.
Founder & Senior Engineer
Robin Hopp has spent more than ten years on performance-critical systems, from embedded software and IT security to cloud infrastructure. He currently develops C++ backend components of Germany's electronic patient record (ePA) at IBM, which is available to 73 million insured people. At DuoByte he brings this experience to architecture, security and systems-level development.
Founder & Full Stack Developer
Daniel Ruppin has built full-stack applications for more than five years and holds a Master of Science in business administration. He has delivered B2B platforms, SaaS products and mobile apps and is currently building, among other things, a dealer management platform for the automotive industry. At DuoByte he translates business processes into software that works in day-to-day operations.
Services
Our projects range from internal web applications and customer portals to integrations between existing systems. For accessibility under the BFSG and for healthcare, we bring specific experience.
Internal tools, dashboards and SaaS products that follow your processes instead of bending them. Designed and coded by the founders themselves.
Learn moreProtected portals for customers, dealers and members: orders, bookings and documents as self-service, with clear roles and permissions.
Learn moreAPI integrations, ERP and accounting connections, PDF imports and automated jobs that move data reliably between your systems.
Learn moreWCAG 2.2 AA audits, fixes in the source code and automated CI checks for web apps, portals and online shops that fall under Germany's BFSG.
Learn moreBackend experience from Germany's ePA, an appointment platform for a practice network, and architectures that account for GDPR Article 9 and Section 393 SGB V.
Learn moreWhat matters to us
Six principles that apply to every project, from the first conversation to day-to-day operation.
We plan roles, permissions and data flows so that the GDPR is covered from the first version onward.
Code reviews, automated tests and reproducible deployments make every change traceable.
Clear modules, documented interfaces and established technologies keep your system extensible for years.
You receive the complete source code and documentation. There is no artificial lock-in.
You talk to the founders who build your project. We reply to inquiries within 24 hours.
We build interfaces along the WCAG criteria so they also work with a keyboard and a screen reader.
No pitch deck and no hand-off to a sales team. Instead, a direct conversation about goals, feasibility and the next sensible steps.
