Senior Full-Stack Engineer — MUST use Codex & Claude Code daily | Supabase/FastAPI

🌍 About us We're a German company in the renewable-energy sector (solar, heat pumps, battery storage). We're building internal tools and systems and need a senior developer who can own features end-to-end. 💻 What you'll do Build entire features and internal systems — from database and architecture to a clean frontend. You work independently, not on tickets someone else scoped. ✅ You must have 5+ years as a developer, working independently (no juniors) 🤖 Daily hands-on work with AI coding agents — specifically Codex and Claude Code. This is non-negotiable. "I use ChatGPT sometimes" is not what we're looking for. ⚙️ Strong backend / architecture skills: Supabase (incl. Edge Functions) and FastAPI 🎨 Solid frontend (React) 🗣️ Fluent English (required) ⭐ Big plus 🇩🇪 Fluent German — strongly preferred n8n automation, Zoho CRM ⚠️ Please only apply if you meet the must-haves above — especially the daily Codex & Claude Code requirement and fluent English. Applications that ignore these will not be considered. 📩 In your proposal, tell us: How you use Codex and Claude Code in your daily workflow One feature or system you built end-to-end (idea → release) Your rate, availability (hours/week), and time zone