Senior Software Engineer - (Go) Real-Time Engine

Synthflow AI is an enterprise AI agent platform that unifies customer operations across voice, chat, and messaging. Our agents handle routine interactions at scale so teams can focus on high-value work.

- Over 20M hours of operations automated

- 60% more calls answered vs. non-AI operators

- 150M interactions handled, 99.99% uptime

Backed by Accel, Atlantic Labs, and Singular. Trusted by 1,000+ customers. Recognized as one of the most promising companies in Germany.

ABOUT SYNTHFLOW

At Synthflow we’re building the easiest way for businesses to create AI-powered phone agents. No coding, no fuss—just smarter automation. We’re passionate about delivering the future of voice technology with lightning-fast, scalable solutions. It’s an exciting time at Synthflow: we’re early, fast-growing, and laser-focused on impact. Join us to do the best work of your career while helping businesses thrive.

ABOUT THE ROLE

We’re looking for a Senior Go Software Engineer to build real-time voice AI systems that set the standard.

YOUR RESPONSIBILITIES WILL INCLUDE:

- Design and enhance backend infrastructure focusing on scalability, performance, and reliability. Implement features and maintain the systems that power our next-generation products.

- Expertly manage concurrency and parallelism in Go using goroutines, channels, and synchronization primitives like mutexes and wait groups.

- Develop robust networking and streaming capabilities, including experience with network programming, sockets, and protocols like WebSockets and WebRTC.

- Lead performance optimization initiatives by profiling Go code, reducing latency, and efficiently managing memory and garbage collection.

- Build fault-tolerant systems with strong recovery mechanisms and failover strategies to maintain service continuity.

- Implement comprehensive logging and tracing using tools such as zap, klog, OpenTelemetry, and Jaeger to enhance monitoring and troubleshooting.

- Appl...