Build a website.Develop a web app.
Princeps Digital develops professional websites, web apps, AI agents and automation systems for companies in Germany and beyond.
Founder-ledDesigned, developed and verified by Jonathan Fürst
Website developmentWeb app developmentUX/UI designTechnical SEOFounder-led
When digital work is harder than it should be
Princeps starts with the business problem, not a tool. The result must work for customers, teams and the company.
- 01
Your digital presence does not communicate the quality your company actually delivers.
- 02
Knowledge is scattered across documents and systems instead of available at the right moment.
- 03
Information is copied repeatedly and recurring workflows remain manual.
- 04
AI is tested, but not integrated reliably into real business processes.
Website, web appand intelligent systems
From a professional company website to a custom web application, Princeps connects strategy, design, development and technical visibility.
Website development
Professional websites explain your offer clearly, load quickly and guide interested visitors toward a qualified inquiry.
- Web design and UX/UI
- Responsive web development
- Technical SEO and structured data
- Performance, accessibility and hosting
Web app development
Custom web apps simplify workflows, make data useful and give customers or teams direct access to digital services.
- Customer portals and internal tools
- Forms and data flows
- APIs and integrations
- Secure, responsive interfaces
AI & automation
AI systems and automated processes make approved knowledge available and reduce unnecessary manual work.
- Agents and RAG
- Knowledge systems
- Workflow design
- Evaluation and human oversight
Not just builtVerified
Websites and digital systems are checked against relevant functions, risks and technical requirements before handover.
Explore audit expertise01Browsers & devicesReal user journeys and responsive states
02PerformanceLoading behavior, stability and bottlenecks
03AccessibilityWCAG-oriented checks and keyboard support
04SEO & structureSemantics, metadata and machine-readable content
05Security & privacyRelevant signals, data paths and configuration
06EvidenceFindings with severity, confidence and reproduction
The Princeps Method
A structured path from a website or system idea to a reliable, maintained result.
- 01
Understand
Understand goals, users, processes and existing systems.
- 02
Design
Structure the solution, architecture, UX and data flows.
- 03
Build
Develop websites, web apps, AI systems, interfaces and integrations.
- 04
Verify
Test functionality, quality, performance and relevant risks.
- 05
Operate
Plan operations, monitoring and focused development.
Founder-ledDirect technical responsibility
From the first conversation to the finished system, you work with the person who designs and develops the solution.
JF
Jonathan FürstFounder & Software Developer
I combine applied software development and digital business with AI agent engineering. My focus is on websites and web apps that solve a real business goal and remain technically sustainable.
Princeps is deliberately founder-led: short paths, clear decisions and technical responsibility without handover to an unknown project team.
Background on LinkedInWeb projects and client feedback
Authentic feedback on website development, collaboration and technical delivery.
5.0 / 5.02 published reviews
★★★★★
„Hohe Kompetenz, Professionalität, klare Umsetzung, souveräne Beratung, bestes Ergebnis = Top Leistung!“★★★★★
„Jonathan hat unsere Website extrem schnell, sauber und professionell umgesetzt. Unsere Leistungen, Öffnungszeiten und Kontaktmöglichkeiten sind jetzt viel übersichtlicher dargestellt. Die Zusammenarbeit war unkompliziert, zuverlässig und Änderungswünsche wurden direkt umgesetzt. Besonders positiv war auch der sehr faire Preis. Mit dem Ergebnis sind wir absolut zufrieden.“Before the first conversation
Four answers about websites, web apps, responsibility and quality.
What kinds of websites and web apps does Princeps develop?
Custom company websites, landing pages, customer portals, internal tools and digital processes where strategy, UX and technical implementation belong together.
Who works on my project?
Founder Jonathan Fürst remains directly responsible for the technical work from the first conversation to the finished system.
How is a website prepared for Google Search?
With a clear information architecture, semantic HTML, technical metadata, structured data, strong performance and helpful content for real search queries.
How is quality verified?
Depending on the project, through browser and device testing, performance checks, accessibility, technical SEO, security and privacy signals, and documented acceptance testing.
Discuss a website or web app
You receive a direct technical assessment of scope, architecture and the best next step for your digital project.