SECTION I · THE BRIEF
Brief #83772Updated 21 AUG 2026SAN FRANCISCO, CAYcY COMBINATOR
Employbl Company Profile

Senior/Staff Software Engineer, Voice AI

Lightberry designs and develop robotic software for human-robot interactions with emotional intelligence.

Location
San Francisco, CA
Company size
2–10
Posted
1mo ago
Via
Yc
Section II · Full ProfileFree with an account
  • 01Comp band & equity packageLocked
  • 02Seniority & experience requirementsLocked
  • 03Interview process & rubricLocked
  • 04Hiring manager & team contextLocked
  • 05Growth trajectory in this roleLocked
  • 06Offer & decision timelineLocked
Create free accountSign in

Free account · no card · 2 minutes

Job listing · Updated 21 AUG 2026

Senior/Staff Software Engineer, Voice AI

Lightberry· San Francisco, CA, USView company profile

Job title
Senior/Staff Software Engineer, Voice AI
Job location
San Francisco, CA, US
Job listing URL
https://www.ycombinator.com/companies/lightberry/jobs/J1rOMLl-senior-staff-software-engineer-voice-ai
Job description
Humanoid robots doing backflips are super cool, but to be useful they need to be able to listen, communicate, and operate in the world. Your role in our organization would be to help make that a reality by developing the cloud-based side of our robots that makes them intelligently understand the people interacting with them. **What you'll do** * Use robots that cost more than most cars to evaluate and test new features * Iterate on software deployed to customer's robots in the real world * Improve our composite voice pipelines using the latest state of the art models * Add and improve features like knowledge storage/retrieval, smarter turn taking, automatic personality tuning * Create clever approaches to reducing latency and make interactions feel more natural **What we’re looking for** * Experience with cloud development (AWS, GCP, Kubernetes) * Experience with latency sensitive applications (voice pipelines, video games, streaming) * Experience with voice AI * High ownership of product features * Addiction to observability metrics * Excellent taste in developer tooling **Technology** * Our cloud code is primarily Python 3.14 and it uses a custom UDP-based streaming protocol to communicate with the robots * We deploy at edge locations across the world in GCP and AWS **Who will you work with** * Self driving engineers from Argo, repeat YC founders, CERN physicist, Emmy winning animators * Previously built: a web browser (SigmaOS), self-driving cars (Argo), radiation detectors on the ISS, and more. **Why we are working on this - and why you should!** * Robots should feel like C3PO or Wall-E, not Terminator or iRobot * We started solving voice for hardware - now we work with the biggest humanoid companies in the world * Robots and people must work side-by-side and therefore robots must be delightful
View job listing ↗
The Saturday Briefing

Get the Saturday tech briefing

New company profiles, funding moves, and who’s hiring across the market — every Saturday morning.

Where this role is based

San Francisco, CA

Loading map…

Lightberry headquarters

San Francisco, CA

Company size

2–10 employees

Founded

2025

Total raised

$500,000

View company profile ↗

Funding rounds

Investors

Y Combinator