Realtime Backend Engineer (LiveKit / SIP)

NAIRON GmbH; United States; Remote; USD 120,000 - 180,000; Full time

Benefits offered by this job

Laptop provided

Phone provided

Remote or coworking setup

Job summary

NAIRON GmbH seeks a backend engineer to design and operate distributed real-time systems. You will build microservices for real-time media workloads, coordinate services via messaging and integrate with customer tools in a remote-enabled team.

Strong Python skills, asynchronous programming, and experience with NATS/Kafka, Kubernetes and OpenTelemetry are important. English communication must be clear in a distributed setup.

Qualifications

• Mid-level or senior backend experience operating distributed, real-time systems in production.
• Strong Python skills, including asynchronous programming and FastAPI.
• Experience with NATS, Kafka or comparable messaging systems.
• English proficiency for written and spoken communication in a distributed team.
• Calm, systematic debugging under load and clear technical documentation.

Responsibilities

• Design, build and operate microservices supporting real-time media workloads.
• Use messaging and real-time data systems to coordinate services and events.
• Help connect phone calls through SIP trunks, routing and transfers, and investigate call quality.
• Integrate customer systems such as CRMs, calendars and ticketing tools.
• Run cloud services with containers and orchestration, supported by useful metrics, logs and traces.
• Contribute to code reviews, technical discussions and architecture planning.

Skills

Python

Async programming

Distributed systems

Backend development

Microservices

Tools

FastAPI

NATS

Kafka

Kubernetes

OpenTelemetry

Grafana

Cloud

Job description

Role overview

Build and operate backend services that move calls and events through a real-time communications platform. The role focuses on distributed systems, messaging and telephony integrations, with responsibility for reliability and observability in production.

Responsibilities

• Design, build and operate microservices supporting real-time media workloads.
• Use messaging and real-time data systems to coordinate services and events.
• Help connect phone calls through SIP trunks, routing and transfers, and investigate call quality.
• Integrate customer systems such as CRMs, calendars and ticketing tools.
• Run cloud services with containers and orchestration, supported by useful metrics, logs and traces.
• Contribute to code reviews, technical discussions and architecture planning.

Requirements

• Mid-level or senior backend experience operating distributed, real-time systems in production.
• Strong Python skills, including asynchronous programming and frameworks such as FastAPI or similar.
• Understanding of microservice design, messaging, idempotency, backpressure and failure handling.
• Experience with NATS, Kafka or a comparable messaging or data system.
• English proficiency for written and spoken communication in a distributed team.
• Calm, systematic debugging under load, independent work habits and clear technical documentation.

Nice to have

• LiveKit, WebRTC or other real-time media experience.
• SIP/VoIP knowledge, including trunks, proxies or RTP troubleshooting.
• Cloud, Kubernetes and observability experience, such as OpenTelemetry or Grafana; TypeScript or Go.

Benefits and work setup

• Remote or co-working arrangement, with a laptop and phone provided.
• Small, agile team environment, with exposure to the full call path and opportunities to grow into telephony or AI work.