Guillermo Liss

• Building VISIAN Image Annotator, a web-based medical imaging annotation platform for clinical studies: annotators view, label and manage DICOM images collaboratively • Developed major parts of the front-end: React + TypeScript, complex state management (MobX, react-query), handling large medical image datasets in the browser • Set up e2e testing with Playwright, protecting releases in a domain where data integrity matters (clinical studies) • Long-term collaboration with the client engineering team

• Building and shipping websites and web apps for clients with React, Next.js, Node.js, TailwindCSS, backed by headless CMS setups like DatoCMS and self-hosted Directus (multi-tenant, with per-client space isolation) • Running own production infrastructure: deploying and operating apps on a VPS with Dokploy, self-hosting analytics, headless CMS, and tools, PostgreSQL/Supabase backends, including domain, DNS and email setup end to end • Managing all work with Git (GitHub, Codeberg) and modern CI/CD workflows

• Built the management tool shipped with SoftIron's storage servers: a React dashboard giving customers real-time visibility into their cluster health • Developed internal tools: web asset management system and cross-platform desktop app (React + Tauri) for manufacturing workflows • Co-created the company's design system and icon library • Built e2e test coverage with Cypress for the flagship product • GitFlow + GitLab CI/CD with strict MR reviews; Docker dev/test environments

Development of commercial websites and web applications for different customers in a digital agency. It included websites for real estate, e-commerce, and marketing agencies.

Development and maintenance of main e-commerce product web application. Development of REST API for mobile application.