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Portfolio Jobs

Looking for your next role? Take a look at these exciting jobs at Sapphire Ventures’ portfolio companies. Our Talent team is passionate about connecting you to your dream job!

Senior WebRTC Engineer



Kyiv city, Ukraine
Posted on Sunday, May 21, 2023
Restream is looking for a WebRTC Engineer to join us to solve complex challenges and build world-class products. In this role, you will build new features, design and implement new services, and improve the reliability of our systems as we rapidly scale our product and organization. You understand the importance of simplicity and reliability, and you calculate the impact of every decision on each. We believe in small teams where each member contributes significant value.


  • Develop and maintain features in the Restream Studio product.
  • Design and implement video streaming and video processing services necessary to support new and existing features.
  • Design metrics that capture the many-to-many conferencing and video streaming experience as well as the system performance.
  • Implement solutions to maintain top-notch video quality under high load.
  • Give and receive code review feedback with the team.
  • Maintain a pulse on emerging technologies and discover hidden opportunities in our environment.
  • Ensure redundancy and resilience of Restream production infrastructure.


  • A scrappy, entrepreneurial attitude that gets high-quality projects done quickly.
  • Expert in at least one general-purpose programming language. Node.JS (TypeScript), Rust, or C/C++ would be a plus but are not a requirement.
  • Highly proficient in WebRTC technologies (TURN, STUN, ICE) and codecs (AAC, Opus, H264, H265, VP8, VP9, AV1, etc.).
  • Experience with network protocols (HTTP, TCP/UDP, Websockets)
  • Deep understanding of real-time media streaming solutions like FFmpeg, Wowza, GStreamer, Janus, Jitsi, MediaSoup, Kurento, Medooze, etc.
  • Understanding of database design, with both relational and NoSQL (Scylla, Redis) databases.
  • Comfortable working with AWS, Linux, Docker, Kubernetes, continuous deployment workflow, multiple programming languages tech stack.
  • Strong written and verbal communication skills.
  • Self-directed, analytical, and work well in a team environment.
  • Passionate about the Restream product.
Restream is the #1 solution for creating professional live videos and streaming them to all social networks at once. Millions of people around the world use Restream to reach, engage, and monetize their audiences. We’re a small and diverse group of dreamers who make technology work for the world. We believe that a small but highly driven and focused team can make a lasting impact in any area.
What we offer:
- Startup environment and a flat company structure
- Work closely with founders and team to build and grow the product
- Direct influence and impact on the direction of the product and development
- The ability to create something that influences people's lives
- Competitive pay & equity options