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Vienna, Austria/Freelance developer

Senior Full-Stack Developer for React, AI and Mobile Products

I build responsive, scalable web and mobile products with modern JavaScript frameworks, strong user experience, and pragmatic AI integrations.

10+

years building digital products

React

core frontend craft

AI

recent product focus

portfolio.sh

$ ship product --stack react,type-safe,ai

ready: architecture, frontend craft, mobile delivery, AI workflows

Abstract technical field representing React, AI and mobile product work
Andreas Siedler in a collaborative conversation
human interface: online
build: green / latency: low / scope: product

Current focus

  • React and TypeScript frontends
  • Expo and Flutter mobile apps
  • AI workflows with OpenAI and ElevenLabs
  • Scalable product architecture

./ Selected client work

Products that moved from idea to real users.

A compact view of recent and representative work from the CV, with each card centered on product context, contribution and stack.

01

2025 - present

Cross-platform mental training app

Coach2Go

Building athlete-coach workflows, guided audio sessions, progress tracking, AI-assisted content generation, and coach insights.

ExpoReact NativeTypeScriptSupabaseOpenAI APIElevenLabsGluestack UI

02

2022 - present

Frontend-focused product development

Verbund AG

Developing and optimizing React features, contributing to .NET integrations, testing flows, and supporting mature CI/CD delivery.

ReactTypeScript.NETJestTesting LibraryJenkinsScrum

03

2024 - 2025

Online canteen platform

Netkey / Webrestaurant

Delivered web app features in a small agile team, including payment workflows, Docker environments, and GitLab CI/CD.

LaravelVue.jsTypeScriptDockerGitLab CI/CDPayment APIs

04

2024 - 2025

Social networking mobile app

Orbyz

Built a cross-platform social app with user profiles, messaging, content sharing, notifications, and Django API services.

FlutterFlutterFlowDjangoPythonREST APIsAuthentication

05

2023 - 2024

Corporate website and CMS architecture

AIEndoscopic

Implemented a responsive, mobile-first website with a headless CMS, performance-minded architecture, and SEO foundations.

Next.jsReactStoryblokTailwind CSSSEO

06

2020 - 2022

Headless commerce platform

MediaShop / Computerfutures

Contributed to a React commerce frontend with reusable components, Storybook, Cypress coverage, and backend integrations.

ReactTypeScriptNode.jsSymfonyStorybookCypressCommercetools

./ Private projects

Space for current experiments and own products.

These are intentionally placeholders. They are ready for names, links and concrete outcomes once the projects should be public.

01

Draft placeholder

Editable project slot

Private project placeholder 01

Replace this with a current personal project, the problem it solves, and the stage it is in.

Add stackAdd linkAdd status

02

Draft placeholder

Editable project slot

Private project placeholder 02

Use this card for an experiment, SaaS idea, AI workflow, app prototype, or open-source tool.

Add stackAdd linkAdd status

03

Draft placeholder

Editable project slot

Private project placeholder 03

Keep the copy specific once the project is ready: audience, outcome, and what you built.

Add stackAdd linkAdd status

Capability stack

Frontend craft with enough backend range to ship.

stack module

Frontend

ReactNext.jsTypeScriptVue.jsTailwind CSSResponsive UIStorybook

stack module

Mobile

ExpoReact NativeFlutterFlutterFlowMobile architectureGluestack UI

stack module

AI and Backend

OpenAI APICodexClaudeElevenLabsNode.jsSupabaseDjangoLaravel

stack module

Delivery

Software architectureREST APIsDockerCI/CDGitLabJenkinsAWSTesting

Earlier experience

A broad product history across ecommerce, web apps and mobile.

  1. 2022

    Frontend Developer, Cyberbelt / ZTP.digital

    React dashboard app with Tailwind CSS, data visualization, reusable components, and performance-minded UI.

  2. 2022

    Mobile App Developer, OMComputer

    Flutter app delivery, mobile architecture consulting, and support for internal development teams.

  3. 2022

    Shop Developer, Quqon

    Shopware 6 feature development, staging environment setup, and ecommerce workflow improvements.

  4. 2020 - 2021

    Full-Stack Developer, Enlivio

    MERN stack web application, Flutter mobile app work, TensorFlow integration, and cloud delivery support.

  5. 2019 - 2020

    Full-Stack Developer, Waytation

    Vue.js and React product work, Django services, REST APIs, browser compatibility, and Scrum delivery.

  6. 2016 - 2019

    Frontend Development, Apoolco

    Shopware development, responsive design, technical SEO, and a React-based shop ticket system.

  7. 2015

    Web Development, Comstratega

    WordPress websites, SEO and SEM support, customer training, layout work, and digital content.