Happyrobot
Senior Software Engineer - Full-Stack
$220K–$250K
San Francisco · On-site · Senior · Full-time · Posted Dec 20, 2025
- Experience
- 5+ years of professional experience
About the job
Build and own full-stack product features and infrastructure, including web application sections and improvements to voice AI systems.
What you'll do
- Design, implement, and ship features end-to-end, from UI to APIs to infrastructure.
- Optimize and scale voice AI infrastructure for latency, reliability, and cost.
- Collaborate with founders and teammates on product direction, shipping frequently and iterating on user feedback.
What they ask for
- Strong generalist with expertise in either front end or back end and comfort working across the stack.
- Front-end expertise with TypeScript and Next.js, including performance, UX, and clean architecture.
- Back-end experience with Go building reliable, scalable systems.
- Product-minded approach to tradeoffs among speed, quality, and scale.
Pay
$220K – $250K (USD, base salary)
Tools
TypeScript, Next.js, Go
AI focus
Optimize and scale voice AI infrastructure, improving latency, reliability, and cost.
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