Senior Software Engineer
Prosper AI
full-time
Posted on:
Location Type: Hybrid
Location: Barcelona • Spain
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Job Level
Tech Stack
About the 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.
Requirements
- 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).
Benefits
- Flexible work arrangements
- Professional development
Applicant Tracking System Keywords
Tip: use these terms in your resume and cover letter to boost ATS matches.
Hard Skills & Tools
FastAPIPythonReactTypeScriptdistributed systemsasynchronous workload orchestrationLLMsAI agentsML modelsvoice agents
Soft Skills
ownershiphard workfounder mindset
Certifications
Bachelor’s degree in Computer ScienceMaster’s degree in Computer ScienceBachelor’s degree in EngineeringMaster’s degree in EngineeringBachelor’s degree in MathsMaster’s degree in MathsBachelor’s degree in PhysicsMaster’s degree in Physics