Go · REST APIschi router, pgx, PostgreSQL, modular monolith, session auth + CSRF + rate limiting, automated migrations.
React 19 · TypeScriptVite monorepo, design-token CSS, full RTL, installable PWA, network-first service worker, i18n for 10 locales.
AI integrationOpenAI Responses API, grounded tutoring with citations from user uploads, structured extraction, mock fallbacks.
DevOpsOracle Cloud VPS, Caddy auto-TLS, GitHub Actions CI, zero-downtime deploys, Linux administration.
Security & GDPRCookie sessions, CSRF, rate limits, cascade account deletion, privacy-request workflow, EU hosting.
Product & QAAutomated persona tests, AI review agents, building from real user feedback instead of assumptions.