Software Engineer, Voice AI / Backend

CLERA; Berlin; On-site; EUR 85,000 - 160,000; Full time

Benefits offered by this job

Visa sponsorship

Relocation support

Equity

Job summary

Clera Labs, Inc. in Berlin is seeking a senior distributed systems engineer to own end-to-end voice AI projects. You will design, build, and operate production systems for real-time audio, retrieval-augmented generation, and agent orchestration.

You will work across Python, FastAPI, TypeScript, PostgreSQL, Redis, and cloud infrastructure, and contribute to memory, scheduling, and observability. Visa sponsorship and relocation support are available, with equity included.

Qualifications

• Production experience shipping distributed systems and owning projects end-to-end.
• Strong fundamentals in Python, FastAPI, or TypeScript in production systems.
• Experience with real-time systems, audio processing, or voice infrastructure and production LLM/agentic systems.
• Experience with PostgreSQL, Redis, or similar data stores, plus cloud infrastructure on AWS, GCP, or Azure.
• Ability to design or debug systems involving concurrency, load balancing, and fault tolerance.
• Familiarity with observability platforms and related tools is a plus.

Responsibilities

• Build reliable voice AI systems, including retrieval-augmented generation and model routing.
• Design and operate a distributed call scheduler handling concurrency, time zones, retries, and provider limits.
• Extend agents across voice, messaging, and email with shared memory and state across conversations.
• Develop memory and reasoning systems preserving context through customer workflows.
• Build AI-assisted tools for configuring agents and diagnosing issues with business integrations.
• Improve observability and resilience by ensuring graceful recovery when calls or providers fail.

Skills

Distributed systems

Python

FastAPI

TypeScript

Real-time systems

Audio processing

PostgreSQL

Redis

Cloud infrastructure

AWS

GCP

Azure

Concurrency

LiveKit

Temporal

React

Observability

Message queues

Workflow orchestration

Tools

LiveKit

Temporal

React

Message queues

Job description

About the Role

Join a small, fast-moving engineering team building voice AI agents for customer-facing workflows. You will own projects end-to-end across applied AI, real-time audio, and distributed systems, helping turn complex customer needs into reliable production software.

What You'll Do

• Build reliable voice AI systems, including retrieval-augmented generation, dynamic model routing, and evaluation of transcription systems.

• Design and operate a distributed call scheduler that manages concurrency, race conditions, time zones, retries, and provider limits.

• Extend agents across voice, messaging, and email, maintaining shared memory and state across real-time and asynchronous conversations.

• Develop memory and reasoning systems that preserve context through customer workflows.

• Build AI-assisted tools for configuring agents, diagnosing issues, and connecting to business systems such as CRMs, calendars, and email.

• Improve observability and resilience by making failures traceable and ensuring graceful recovery when calls, workers, or providers fail.

What We're Looking For

• Production experience building and owning distributed systems, with a track record of shipping product software and delivering projects end-to-end.

• Strong software fundamentals and experience with Python, FastAPI, or TypeScript in production systems.

• Experience with real-time systems, audio processing, or voice infrastructure, and with production LLM, AI model, or agentic systems.

• Experience with PostgreSQL, Redis, or similar data stores, plus cloud infrastructure on AWS, GCP, or Azure.

• Ability to design or debug systems involving concurrency, load balancing, and fault tolerance.

• Familiarity with tools such as LiveKit, Temporal, message queues, workflow orchestration, React, and observability platforms is valuable.

• Independent, action-oriented approach, sound judgment about code quality and reliability, and a focus on team and customer outcomes.

Compensation & Benefits

€85,000 to €160,000 annually, plus equity. Visa sponsorship is available, and relocation support is offered.

Location

On-site in Berlin, Germany.