06.10.2026 aktualisiert
verifiziert
Premiumkunde
100 % verfügbarPrincipal Software Engineer | Tech Lead | React Native, React, TypeScript, Full Stack
Köln, Deutschland
Weltweit
AbiturÜber mich
I’m a hands-on Principal Software Engineer and former Head of Engineering with 17+ years of experience. I build and scale mobile and web products end-to-end — from 0→1 development to production systems with tens of thousands of users. Available immediately for remote freelance projects.
Skills
AI AgentsLLMSupabaseJavaScriptMobile Application DevelopmentPostgreSQLNode.jsSoftware ArchitectureRapid PrototypingTypeScriptReact.jsCypressGoogle FirebaseExpo.ioPlaywright
Principal Software Engineer and Tech Lead with 17+ years of experience building and scaling web and mobile products. Former Head of Engineering with a strong hands-on engineering background, from early-stage 0→1 products to production systems with tens of thousands of active users.
Core Technologies:
React Native, React, Next.js, TypeScript, JavaScript, Node.js, Expo, PostgreSQL, Supabase, Firebase, REST APIs, Serverless, Cloudflare Workers, Git, CI/CD
Mobile Development:
React Native, Expo, iOS, Android, App Store, Google Play, In-App Purchases, Subscriptions, RevenueCat, Push Notifications, Native Integrations
Frontend & Full Stack:
React, Next.js, TypeScript, Tailwind CSS, responsive web applications, component systems, API integration, application architecture
Backend & Cloud:
Node.js, PostgreSQL, Supabase, Firebase, Serverless Architecture, Edge Functions, Cloudflare Workers, authentication, realtime systems, database design and API architecture
AI & Product Engineering:
AI-assisted development, LLM integration, rapid prototyping, product development, MVP development, technical architecture and building production-ready products from concept to launch.
Technical Leadership:
Tech Lead, Principal Engineer, Head of Engineering, Software Architecture, Engineering Management, Team Building, Code Reviews, Mentoring, Technical Strategy and hands-on implementation.
I am particularly experienced in taking ownership of complex products end-to-end: architecture, implementation, deployment, analytics, performance, scaling and ongoing product development.
Available for freelance projects as Principal/Senior Software Engineer, Tech Lead, React Native Developer, React/TypeScript Developer, Full Stack Developer or Fractional CTO.
Erfahrung
Berufserfahrungmehr als 10 Jahre
Freelancer seit2008
Sprachen
DeutschMutterspracheEnglischverhandlungssicher
Projekthistorie
Founder and Principal Engineer of Just Loot, a mobile RPG/live-service product built and operated end-to-end.
• Designed and developed the React Native / Expo mobile application
• Built the backend architecture with Supabase, PostgreSQL and Edge Functions
• Developed authoritative game systems, progression, inventory, multiplayer and live-service features
• Built realtime systems using Cloudflare Workers and Durable Objects
• Implemented subscriptions and in-app purchases with RevenueCat
• Built analytics, experimentation and live-operations infrastructure
• Responsible for architecture, product development, deployment, scaling and ongoing operations
Results: 34K+ accounts in 3 months · 3K+ DAU · D1 57% · D7 29% · D30 14%
Tech: React Native · Expo · TypeScript · Supabase · PostgreSQL · Edge Functions · Cloudflare Workers · RevenueCat
Co-Founder, CTO and hands-on Principal Engineer for an AI-native mobile product.
• Designed the technical architecture and built the product from 0→1
• Hands-on development across React Native, Next.js and TypeScript
• Built backend infrastructure using Supabase and Hono
• Integrated LLM/AI functionality using Mistral AI
• Developed mobile audio, voice and realtime interaction features
• Built product analytics and monitoring with PostHog and Sentry
• Responsible for technical strategy, architecture, product engineering and delivery
Tech: React Native · Next.js · TypeScript · Supabase · Hono · Mistral AI · PostHog · Sentry
Head of Engineering and later hands-on Tech Lead at Ordio, a B2B workforce management SaaS platform.
• Led engineering through Seed → Series A growth
• Scaled the engineering team from 2 to 15 developers
• Hands-on development across React Native, React, Next.js and TypeScript
• Responsible for software architecture and technical strategy
• Built and scaled mobile and web product features for 80K+ daily active users
• Established engineering processes, code reviews, CI/CD and development standards
• Worked closely with product and design on product development and experimentation
• Implemented analytics and experimentation with PostHog and used data to optimize product and growth
Results: 80K+ DAU · Engineering team 2→15 · Seed → Series A
Tech: React Native · React · Next.js · TypeScript · PostHog · CI/CD · Product Analytics