About The Position

We build AI phone assistants for small and medium-sized businesses – so they never miss a call again and can focus on what matters most. Our AI answers every call automatically. But voice is just the beginning. Our vision is to build the first fully automated CRM system in the world. 8,000+ customers. >€5M ARR. ~30% monthly growth. Target by EOY: €30M. We live ownership. You own your projects and tasks end-to-end. No politics, few meetings, direct feedback. At fonio, you'll build alongside the smartest and most ambitious people around. Apply now and become part of one of Europe's most insane growth stories!

Requirements

  • Solid coding skills: you can implement independently, not just configure
  • Strong understanding of AI systems and LLMs (prompting, tool-use, RAG, failure modes)
  • Workflow thinking: translate complex processes into robust, testable flows
  • Experience with APIs, webhooks, auth, and common integration patterns
  • Cloud fundamentals: deployments, observability, debugging in production
  • Highly pragmatic working style: ship fast, make it stable, iterate
  • Spanish and Italian at native or near-native level & English fluent

Nice To Haves

  • Voice/Telephony
  • n8n
  • TypeScript/Python
  • SQL
  • monitoring/tracing
  • GDPR

Responsibilities

  • Capture customer requirements and translate them into concrete implementation plans
  • Build and roll out fonio setups in production: workflows, logic, prompts, guardrails
  • Implement integrations with third-party systems (APIs, webhooks, CRM, calendar, ticketing, etc.)
  • Develop smaller features and glue code to cleanly map customer cases
  • Debug under production conditions: calls, flows, edge cases, fast fixes
  • Build reusable templates and deployment playbooks to make setups scalable
  • Deliver product feedback: bring pain points and feature gaps to the team, prioritized and concrete

Benefits

  • Competitive salary: €65,000–€95,000 per year
  • Barcelona-based role, with relocation to Vienna for onboarding
  • One of the coolest offices in Vienna's 7th district (lunch & dinner included)
  • 100% Focus Time (no regular meetings)
  • Unlimited budget when the ROI is right
  • Extreme speed (we ship almost daily)
  • Thousands of enthusiastic customers building the product together with us
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