About this role

At Prosper, we’re pushing the limits of what’s possible with real-time AI.
We’re not just making voice agents that “talk”, we’re engineering systems that sound human, reason under strong latency constraints, and adapt instantly to messy, high-stakes healthcare conversations.
As a Software Engineer, you’ll be at the center of designing and scaling our platform, the low-latency speech/LLM pipelines, orchestration layers, and reliability systems that make this possible.

3-5 years of experience building products end-to-end
A strong understanding of the technologies that power our stack or their equivalents in other languages: FastAPI (Python) backend with a React (TypeScript) frontend.
Experience managing large scale distributed systems with asynchronous workload orchestration.
Familiarity with LLMs, AI agents or other ML models is a plus. We use Pipecat for our voice agents.
Founder mindset: ownership + hard work. You see Prosper as a learning step for your future startup.
Be ready to handle the challenges of deploying AI voice agents to thousands of daily phone calls.
Bachelor’s or Master’s degree in Computer Science, Engineering, Maths, Physics or related field (or equivalent experience).

Senior Software Engineer

Key skills