Vienna-based · Remote across DACH / EU · Independent since 2018

Freelance Software Architect & Full-Stack AI Engineer in Vienna

I help startups, founders, and product teams turn complex web platforms, architecture decisions, and AI features into production software - with one senior technical owner from system design to shipped code.

Send project briefCheck fit with AI

Best fit: architecture + hands-on implementation for serious web platforms and AI-enabled products.

  • CTO & Co-founderTinni-Care
  • Frontend LeadApple partner product
  • Freelance since2018
  • Public workGitHub / npm

Where I am most useful

Architecture, delivery, and AI integration without handoff loss.

The strongest fit is work where technical decisions, implementation quality, and product usefulness need to stay close. I am most useful when the project needs both judgment and production code.

Architecture that turns into code

System shape, boundaries, data flow, stack decisions, and delivery tradeoffs for products that cannot stay at diagram level.

Architecture sprint

Senior full-stack delivery

React, Next.js, TypeScript, Node.js, API work, deployment, and product UX handled with one accountable technical owner.

Full-stack development

Practical AI integration

RAG assistants, LLM workflows, vector search, chat interfaces, and tool-use flows inside real product constraints.

RAG / LLM integration

Services

Clear ways to bring me into a project.

Most successful engagements start with a concrete outcome: clarify an architecture, ship a product slice, or integrate AI into an existing system without losing production discipline.

1-2 weeks

Architecture sprint

Clarify system shape, risks, stack decisions, and delivery path before committing to a build.

  • Architecture map
  • Key tradeoffs
  • Implementation plan
  • First technical decisions
4-12 weeks

Full-stack build partner

Hands-on product engineering for a concrete feature, platform slice, AI assistant, or full-stack product iteration.

  • Production code
  • UX implementation
  • Backend/API work
  • Deployment support
  • Technical leadership
2-8 weeks

AI integration track

Bring RAG, chat interfaces, LLM workflows, or automation into an existing product.

  • Retrieval/data flow
  • Assistant UX
  • Integration code
  • Guardrails
  • Rollout considerations
Ongoing / part-time

Fractional CTO / technical product partner

Senior technical direction for founders and product teams that need architecture, vendor judgment, and hands-on implementation.

  • Roadmap support
  • Architecture decisions
  • Technical leadership
  • Product engineering

Featured proof

Tinni-Care: healthcare platform with RAG-based product assistant.

Healthcare platform co-built with an ENT physician. I lead architecture, product engineering, and AI integration as CTO and co-founder.

  • Built a product platform around tinnitus education, patient-facing guidance, and expert-led content.
  • Designed frontend, backend, AI API, content workflows, data flow, and deployment infrastructure.
  • Integrated retrieval-based assistant workflows for expert content with product UX and safety constraints in view.
  • Next.js
  • Node.js
  • PostgreSQL
  • pgvector
  • RAG workflows
  • LLM assistants
Read Tinni-Care case studyVisit Tinni-Care

Video preview: the Tinni-Care website assistant answering a tinnitus question from expert content.

Selected experience

Proof that maps to the work clients hire me for.

CTO & Co-founder

Tinni-Care, healthcare platform built with an ENT physician.

Frontend Lead

Led frontend work on an Apple partner product.

Independent work

Freelance software development since 2018.

Applied AI delivery

Built AI assistants, RAG interfaces, vector workflows, and modern web platforms.

Public engineering work

Open-source projects and reusable JavaScript packages.

Teaching

Trainer for web development and technical communication.

Public engineering work

Packages, demos, and visible shipping history.

Selected public work shows how I build, document, and demonstrate reusable engineering pieces, not just private client systems.

Package demos

Reusable npm packages, shown in motion.

Watch demos

GitHub activity

Contribution history and public repositories.

View GitHub

Technical demos

Short videos that show actual product behavior.

YouTube channel

AI assistant

Use the assistant to check fit before writing a project email.

Ask about my background, Tinni-Care, architecture work, practical AI delivery, or the kinds of projects I can help build.

The assistant can answer questions and help draft a project inquiry. It does not send messages automatically. Please send the final draft to hello@kurzmann.io.

I'm Markus Kurzmann's AI assistant. Ask about his background, Tinni-Care, technical fit, architecture experience, applied AI work, or the kinds of projects he can help build.

AI Assistant

The assistant can answer questions and help draft a project inquiry. It does not send messages automatically. Please send the final draft to hello@kurzmann.io.

  • It helps shape a concise inquiry before you send it directly.
  • Chat messages are kept for up to 30 days so the conversation has context.
  • Do not share sensitive health, legal, financial, or confidential project information here.
Privacy note

Contact

Need senior architecture, product delivery, or practical AI integration for a real product?

Send a short note with what you want to build, where the project stands, and what kind of technical help you need. I am generally interested in relevant freelance and contract opportunities; exact timing and capacity are best discussed directly.

Email MarkusDraft with AIView CV

A useful first message includes:

  • What you want to build or improve
  • Current stack, if there is one
  • Timeline or urgency
  • Team size and decision process
  • Expected involvement: sprint, full-stack build partner, AI integration, or ongoing technical leadership
  • Budget range, if already known