Senior Real-Time Audio/Video Engineer (On-Site Sunnyvale)

Knightscope; Sunnyvale (CA); On-site; USD 155,000 - 210,000; Full time

Benefits offered by this job

Medical, dental, vision

401(k)

Paid time off

Job summary

Knightscope is seeking two Senior Audio/Video Engineers to own real-time audio and video infrastructure across the ICM and Signals platforms. You will design, implement, and optimize the end-to-end A/V stack for low latency and high reliability.

Responsibilities include building WebRTC ingest pipelines, GStreamer pipelines, and low-latency audio processing, plus collaboration on API contracts and on-call runbooks. This on-site role is based at the Sunnyvale HQ.

Qualifications

• 7–10 years of software engineering experience specializing in real-time audio and video systems in production environments.
• Deep expertise in WebRTC — including signaling protocols, ICE/STUN/TURN, DTLS-SRTP, RTP/RTCP, and media server architecture (Janus, mediasoup, or equivalent).
• Strong hands‑on proficiency with GStreamer at the developer level: building and debugging complex multi‑branch media pipelines, working with elements, pads, caps, and custom plugins.
• Proficiency in C/C++ (C++11/14/17) for performance‑critical media and networking code; Python for tooling and automation.
• Solid experience with SIP/VoIP protocols and stacks (pjsip, Asterisk, or equivalent) and low‑latency audio processing.
• Strong understanding of audio/video codecs (H.264/H.265, VP9, AAC, Opus) and streaming protocols (RTSP, RTMP, HLS, RTP).
• Experience with AWS media services (S3, Kinesis Video Streams, Polly, or equivalent) and cloud‑based media pipeline architectures.
• Familiarity with hardware‑accelerated video processing (NVIDIA NVENC/NVDEC, V4L2, or equivalent) is a strong plus.

Responsibilities

• Design, build, and maintain the end-to-end real-time video pipeline: WebRTC/RTSP/RTMP ingest, hardware-accelerated transcoding, and simultaneous multi-stream rendering for up to 10 concurrent robot video feeds.
• Architect and optimize GStreamer-based multi-branch pipelines for video capture, processing, recording, and cloud upload (S3) — including codec selection, pad/cap negotiation, and plugin development.
• Own the full audio subsystem: real-time two-way audio, SIP/VoIP integration (pjsip/Asterisk), text-to-speech (AWS Polly), and talk-down functionality with a sub-200ms end-to-end round-trip latency target.
• Implement and optimize WebRTC signaling, ICE, DTLS-SRTP, and media server components for reliable low-latency communication across distributed robot deployments.
• Profile, debug, and tune A/V pipeline performance for low latency, high throughput, and resilience under concurrent multi-robot load and variable network conditions.
• Build Make-a-Clip functionality enabling operators to extract, annotate, and store video segments from live and recorded feeds.
• Define and maintain A/V API contracts in collaboration with ICM and Signals platform engineers; contribute to code reviews, technical documentation, and on-call runbooks.
• Mentor junior engineers and contribute to architectural decisions across the A/V stack.

Skills

WebRTC signaling

GStreamer pipelines

C/C++ performance

Python scripting

SIP/VoIP protocols

Video codecs H.264/H.265

RTP/RTCP networks

AWS media services

Hardware accelerated video

Education

BS in Computer Science or Electrical Engineering

Tools

Janus/Mediasoup

pjsip/Asterisk

NVIDIA NVENC/NVDEC

AWS Polly

S3/Kinesis

Job description

Knightscope is seeking two Senior Audio/Video Engineers to own real-time audio and video infrastructure across the ICM and Signals platforms. You will design, implement, and optimize the end-to-end A/V stack for low latency and high reliability.

Responsibilities include building WebRTC ingest pipelines, GStreamer pipelines, and low-latency audio processing, plus collaboration on API contracts and on-call runbooks. This on-site role is based at the Sunnyvale HQ.