Software Engineer (AI)

Location: Remote within Greece; candidates must be located in Greece.

Company

hirify.global GmbH is a Swiss startup building AI voice agents for real-time phone and web conversations connected to business tools.

What you will do

• Build Python services around a LiveKit-based real-time voice platform, including call handling, events, and integrations with CRMs, calendars, and ticketing tools.
• Improve conversational behavior, including turn-taking, speech pipeline latency, prompting, and tool calls.
• Design messaging and real-time data services using NATS, Kafka, and Redis-compatible stores, including failure handling, retries, and backpressure.
• Build evaluation systems with test calls, benchmarks, and metrics.
• Run services in the cloud with Docker and Kubernetes, supported by reliable metrics, logs, and traces.
• Participate in code reviews, technical discussions, and architectural planning.

Requirements

• Applicants may be graduates, early-career engineers with substantial hands-on projects, mid-level engineers, or senior engineers; scope and pay follow experience.
• Solid Python skills; asyncio and FastAPI or similar are required for mid-level and senior positions.
• Good fundamentals in Git, APIs, testing, and debugging.
• An evaluation mindset: measuring before and after changes and trusting metrics over impressions.
• Essential English proficiency, written and spoken; English is the working language.
• Calm, systematic debugging during live-call failures, ownership from the first bad call through the production fix, independent work in a distributed team, and clear documentation.

Nice to have

• Real-time audio or conversational AI experience, including speech recognition, speech synthesis, voice activity detection, LLM APIs, LiveKit Agents, pipecat, or WebRTC.
• Distributed systems and messaging experience with NATS or Kafka, including idempotency and backpressure.
• GPU model serving with vLLM or similar, or fine-tuning speech and language models.
• SIP and VoIP basics, TypeScript, or Go.
• Docker, Kubernetes, AWS, and observability with OpenTelemetry and Grafana.
• German is a plus because many calls are in German.

Culture & Benefits

• Fully remote work or work from a co-working space.
• Company laptop and phone provided for all employees.
• Small, agile, collaborative team with direct impact on the product.
• Opportunity to work across the full voice stack, from phone lines to models, and grow toward a preferred area.