Software Architect & Tech Lead

Software Architect & Tech Lead (hands-on). Roles: Software Architect, Solution Architect, Technical Lead, Lead Software Engineer, Full-Stack Architect. Freelance and contracting in Switzerland (Zurich, Basel, Bern, Geneva, Lausanne), remote or on-site.

Software Architecture & System Design

Software architecture, system design, architecture ownership, technical decision-making. Clean Architecture, hexagonal architecture (ports and adapters), Domain-Driven Design, API design, contract-first development, event-driven architecture, realtime and distributed systems, Nx monorepo architecture. End-to-end architectures across NestJS, React Native, React and type-safe API contracts. Architecture reviews and audits, refactoring and modernisation of existing systems.

Backend & Data

TypeScript, Node.js, NestJS, REST, GraphQL, WebSockets, PostgreSQL, Supabase, Redis, database design, migrations, authentication and authorization (JWT, OAuth). Shopify and Stripe integrations, webhooks. Data platforms with dbt, Metabase, analytics pipelines, BI reporting, automated data validation.

Cloud, Platform & DevOps

GCP, Cloud Run, Terraform, Infrastructure as Code, Docker, CI/CD with GitLab CI. SRE and production ownership: observability with Sentry, structured logging, monitoring, alerting, load testing (k6), performance optimisation, incident management, post-mortems, reliability.

Frontend & Mobile

React, React Native, Expo, Flutter, TypeScript, design systems, state management, React Query, Tailwind. Cross-platform mobile apps from architecture to App Store and Google Play releases, mobile CI/CD (EAS, Codemagic), push notifications, mobile analytics.

Realtime & Live Systems

WebRTC, LiveKit, OBS, live video streaming, realtime subscriptions, broadcast messaging, GraphQL subscriptions over Redis, realtime chat, live commerce, live auction and bidding systems under business-critical reliability.

AI Engineering

Production LLM systems, LLM application architecture, agentic engineering, evaluation frameworks, LLM-as-judge, prompt design, AI-assisted engineering. Evaluation-gated LLM assistant: defects reduced 12 to 0 across 37 scenarios.

Leadership & Consulting

Technical leadership of cross-functional teams, hiring, mentoring, code review, engineering standards, agile delivery (Scrum, Kanban), technical roadmaps, scope and budget ownership, stakeholder management, executive reporting, client advisory, handover.

Kenntnisse: Softwarearchitektur, Systemarchitektur, Anwendungsarchitektur, Schnittstellen- und API-Design, Echtzeitsysteme, verteilte Systeme, Cloud-Architektur, Continuous Integration und Delivery, Testautomatisierung, Monitoring, Betriebsverantwortung, Mobile Entwicklung, Full Stack Entwicklung, Technische Projektleitung, Technische Konzeption, Anforderungsanalyse, Technische Beratung, Team-Fuehrung, Mentoring.

Domains: live commerce, e-commerce, fintech, marketplaces, auctions.