Portrait of me

Stefan Eißler

Product Engineer | AI Architect | Business Strategy

4+ years of experience
5+ successfully deployed Solutions
Cross-industry expertise in digital process management

I help mid-sized companies and tech teams make their business processes more efficient and competitive using AI and modern software. As a Product Engineer with a background in Business Informatics, I combine strong strategic understanding with clean technical execution.
Whether it's AI-powered process automation, scalable SaaS solutions, or modern web and mobile applications — I don't just write code. I create measurable competitive advantages and digital products that are actually used.

Selected Work

Leia Curation

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Exclusive Creator Network

Scalable platform for brand marketing in the lifestyle sector. Eliminates manual search efforts and connects brands with high converting content creators.

  • Development of automated curation and intelligent matching of brands with fitting creators to massively reduce acquisition costs.
  • Complete digitization of campaign management from the very first contact to the final reporting.
  • Modern architecture paired with intelligent workflows for an instantly measurable return on the invested marketing budget.

Next.js

Process Automation

Meta Graph API

Business Development

Bitcoin Business Hub

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The Financial Service Layer for the Bitcoin Economy

Automated accounting processes and business intelligence for companies using Bitcoin as hard money within their operations.

  • Enterprise middleware for GoBD-compliant transaction workflows and automated document assignment.
  • Seamless bridge between Bitcoin wallets (non-custodial) and established ERP systems such as DATEV or Lexware.
  • Active pilot customer phase and technical Proof-of-Concept (PoC) for scaling Bitcoin adoption in small and medium-sized enterprises.

Next.js

Bitcoin

Bitcoin Lightning

Business Owner

Auto-Ankauf-Assistent

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AI-Powered Lead Machine for Car Dealerships

A white-label SaaS widget that digitizes the vehicle purchasing process for dealers and drastically reduces manual review efforts using AI.

  • Plug & play integration for dealer websites to enable fully automated, structured collection of customer inquiries and vehicle data.
  • Automated vehicle registration scanning and guided photo uploads powered by Google Gemini AI for instant lead qualification.
  • Built with Next.js, Tailwind CSS, and Neon (PostgreSQL). Replaces inefficient contact forms and delivers sales-ready datasets directly to the dealership.

Gemini AI

Process Automation

Web Development

SaaS

Adoray

Festival App

A mobile-first application developed for Adoray Switzerland, offering users access to current events, festival registration, and an enhanced festival experience through an interactive map-based game.

  • Seamless event registration powered by a Supabase backend.
  • Features a cooperative team-based game where participants complete location-based challenges and submit videos and photos directly through the app.
  • Delivers real-time notifications to drive engagement and create a hybrid digital-physical festival experience.

Expo

Supabase

Blog

August 5, 2025

6 Mistakes to Avoid When Developing an App

April 24, 2025

Why Every Developer Should Learn to Think Like a Business Owner

February 3, 2025

How to create a Monorepo

January 1, 2025

My first Blog Post

Let's talk about your project

I'm looking forward to talking with you about your challenge or idea. Book an appointment directly or write me a message.

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Call me directly

Call me directly for a personal conversation

Call now+49 711 40796069