12+ Years of App Development
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50+ Successful App Projects
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About Us

Your Full-Service Agency for Groundbreaking Apps and Web Applications

We are passionate about app development and support you with custom web solutions to digitally expand your core business.

About Us

Cayas Software

By Your Side from Idea to Market Launch

As a passionate agency for custom web and app development, Cayas Software offers cross-platform solutions for demanding companies. We partner with our clients from initial consultation and concrete development to the implementation of mobile apps and web applications (websites and web services for connecting third-party systems). With our dedicated team of experts, we transform digital ideas into compelling user experiences.

Portrait of Sebastian, CEO of Cayas Software GmbH

Management

Sebastian

The visionary behind Cayas Software, specializing in growth and scaling.

Portrait of Flavio, Head of Technology

Head of Technology

Flavio

The visionary behind Cayas Software, specializing in growth and scaling.

Portrait of Martin, App Developer

App Development

Martin

The visionary behind Cayas Software, specializing in growth and scaling.

A team of UI/UX designers working on designs, underscoring Cayas' vision for user-friendly apps.

Vision

We Create Opportunities

Our vision is a world where user-friendly apps provide uncompromising value, free from barriers and full of potential.

  • Through our daily actions, we create new opportunities for your company to gain new perspectives and grow.
  • Your ideas and our expertise form an unbeatable alliance, allowing you to fully leverage your company's digital potential.
  • Together, we inspire your target audience and ensure your customers will never want to be without your app again.
To UX/UI Design

Target Audience

Unique Apps for the B2B Industry

As a specialized provider of software and app development, our services typically target B2B companies. By programming and developing smart applications, we create real value for small and large businesses across various industries, including logistics, agriculture, building security, health management, and interior design.

The Cayas Software team jointly designing an app, which underscores the cooperative collaboration.

Values

What Drives Us

Outstanding results are our standard—from programming to project management. That's why we always take a holistic approach, striving for continuous development both internally and in our collaborations.

Thinking outside the box is our daily practice. We move beyond established paths, explore new avenues, and openly embrace change. Additionally, we value team diversity and are convinced that varied experiences, ideas, and creative exchange lead to the most innovative solutions.

We are passionate about smart ideas, products, and results. That's why we approach every project with deep interest and give our best to deliver excellent solutions.

We are not just a service provider blindly executing orders, but a proactive partner who contributes valuable insights to your project.

We don't just set goals; we stay focused on achieving them every step of the way. We gladly face challenges and overcome them with a strong solution-oriented approach.

Our Expert Team

Personal Contacts

Sebastian is the founder, owner, and CEO of Cayas Software. As a strategic consultant for software projects, he guides companies with his extensive expertise and experience.

Flavio is Head of Technology and an expert in key areas such as software architecture, database technologies, and mobile apps.

Our Strengths

Expertise in Development and Design

Whether for smartphones, tablets, TVs, or smartwatches—we offer full-service for every individual project. We seamlessly connect desktop, mobile, and web wherever it makes sense.
In addition to apps, we develop high-performance software with maximum functionality. This includes custom applications with a backend, such as web apps.
A high-performing app alone isn't enough—it also needs to look good and be easy to use. As specialists in applications that deliver impressive user experiences, we ensure through UI design that custom software becomes intuitively usable for everyone. With UX design, we guarantee that the user experience is simple, intuitive, and pleasant, so everyone can easily navigate and enjoy using your app.
We want to share our experience and knowledge—not just on our blog, but also through training courses for external teams. That's why our experts are happy to help you boost performance and successfully advance your project.
We don't just support our clients in their development by providing unbeatable mobile solutions. Our team is equally important to us, which is why we foster each individual employee's personal potential. We listen, strengthen talents, and place great value on human collaboration.

Our Milestones

  • 2012:
    Founded by Sebastian Seidel as a sole proprietorship.
  • 2013:
    Honored as the first German "Xamarin Premier Consulting Partner."
  • 2015:
    Rebranded as Cayas Software GmbH.
  • 2016:
    Sebastian Seidel honored as "Microsoft Most Valuable Professional" (MVP)—the highest Microsoft award for dedicated experts with exceptional competence and community contribution.
  • 2021:
    Expanded services to include User Interface Design (UI) and User Experience Design (UX).
  • 2025:
    Official recognition as a training company for IT specialists specializing in application development.
The Cayas Software team jointly designing an app, which underscores the cooperative collaboration.
Portrait of Aron Spohr, CTO flaschenpost SE
»Cayas Software is an excellent team! I personally enjoyed the energy and professional support that the entire team gave us during the project.«
Aron Spohr CTO flaschenpost SE
Portrait of Sebastian Seidel – contact person for app development and digital projects at Cayas Software.

Cayas – Your Key to Successful Apps

Join Cayas and let's bring your idea to life—for business growth beyond digital boundaries!

  • Over 12 years of experience
  • Professional app development
  • Partnership-based collaboration
  • Planning security for your project
Book a Free Initial Consultation. Call Now!