What are the responsibilities and job description for the AI Prompt & Agent Developer position at OpenCall.ai (YC W24)?
Location: On-site (San Francisco or New York)
About Opencall
At Opencall, we’re building AI call centers for non-technical businesses.
We’re solving a unique challenge: pushing the limits of AI at millisecond performance to have the best human-like customer service experience at enterprise scale. Our AI is faster, cheaper, more powerful, and more reliable than anything else on the market. We’re looking for versatile engineers to help scale our proprietary system from millions of calls to billions of calls annually.
We’re looking for an AI Prompt & Agent Developer to help us design, test, and scale next-generation AI agents that deliver measurable impact for our customers. You’ll work at the intersection of LLMs, software engineering, and customer operations, building systems that directly shape how companies interact with their customers.
Responsibilities
Prompt Engineering & QA:
What motivates us?
About Opencall
At Opencall, we’re building AI call centers for non-technical businesses.
We’re solving a unique challenge: pushing the limits of AI at millisecond performance to have the best human-like customer service experience at enterprise scale. Our AI is faster, cheaper, more powerful, and more reliable than anything else on the market. We’re looking for versatile engineers to help scale our proprietary system from millions of calls to billions of calls annually.
We’re looking for an AI Prompt & Agent Developer to help us design, test, and scale next-generation AI agents that deliver measurable impact for our customers. You’ll work at the intersection of LLMs, software engineering, and customer operations, building systems that directly shape how companies interact with their customers.
Responsibilities
Prompt Engineering & QA:
- Design, build, and refine prompts for real-world agent tasks (Q&A, classification, lead qualification, appointment booking, knowledge lookup).
- Develop robust evaluation pipelines to measure accuracy, reliability, compliance, and business outcomes of AI prompts at scale.
- Architect and implement multi-step AI agents that integrate with telephony (Twilio, SIP), CRMs, and customer systems.
- Ensure agents are reliable, scalable, and cost-optimized in high-volume environments.
- Lead QA workflows for AI agents, simulating real-world customer scenarios and measuring outcomes.
- Monitor production agent performance and iterate rapidly to improve.
- Work closely with product, ops, and engineering to design features driven by business needs.
- Partner with sales and customer success teams to translate client requirements into effective agent behavior.
- 2 years of experience with AI/ML, NLP, or prompt engineering.
- Demonstrated experience building and deploying AI prompts and/or agents in production.
- Strong analytical and problem-solving mindset; comfort with ambiguity.
- Excellent written and verbal communication skills.
- Bachelor’s degree in Computer Science, Engineering, Math, or related field.
- Strong programming skills in Python (experience with APIs, data pipelines, testing frameworks).
- Hands-on experience with multiple LLMs (GPT, Claude, LLaMA, Gemini, Mistral, or fine-tuned models).
- Familiarity with telephony platforms (e.g., Twilio) or conversational AI systems.
- Prior exposure to contact center, SaaS, or customer-facing technology.
- Master’s or PhD in a technical discipline is a plus.
What motivates us?
- We hate bad customer service and the “press 1, press 2” headache. Let’s get end customers what they want without the suffering.
- We have more customers than we can handle. That’s why we need you!
- We prefer candidates in San Francisco or New York, but are open to exceptional remote applicants.
Salary : $75,000 - $135,000