Member of Technical Staff, Cekura (San Francisco, In-Person)
Hybrid (San Francisco)$150k - $200k + equityFull-timePosted 2mo ago
About the role
Role focused on building core testing, simulation, and observability systems for Cekura's voice AI platform. In-person, San Francisco, with a high-intensity startup environment.
Responsibilities
- Build the testing and simulation engine. Design and ship systems that simulate thousands of realistic conversations against customer agents across voice, chat, and phone, with control over personas, interruptions, background noise, and edge cases.
- Push the frontier of agent evaluation. Build LLM-powered evaluators, metrics, and the closed self-improvement loop at the heart of the product: detect failure, reproduce in simulation, generate the fix, test it thoroughly, and raise the PR, all autonomously. This includes adversarial red-teaming for jailbreaks, PII leaks, and off-script behavior, plus production monitoring with live drift detection.
- Do applied audio and speech research. Separate background noise from actual speech, and map paralinguistic signals into structured metrics for evaluation of how something was said.
- Own real-time voice infrastructure. Manage SIP, WebRTC, WebSockets, STT/TTS pipelines, and providers like Twilio, Vapi, Retell, LiveKit, and Pipecat with emphasis on latency, barge-in, and audio quality.
- Ship end-to-end. Take features from design to production across backend, infra, evals, and customer-facing surfaces.
- Shape how we build. Architectural decisions and coding standards in a small, senior team will compound as the team grows.
Qualifications
- Strong coding ability in Python, TypeScript, or Go.
- Experience with at least one of: distributed systems, real-time infrastructure, or LLM-based products.
- Strong written and verbal communication.
Skills
Required:PythonDistributed systems
Nice to have:TypeScriptGoLLM evaluation
Benefits
- Top-of-market cash compensation.
- Meaningful equity grants with favorable terms and liquidity potential.
- Relocation support to live near the office; daily office dinners.
- Founders working in the trenches; aligned schedule and effort.
- Opportunities for rapid growth and impactful ownership.
Last updated Oct 7, 2026. Interested? Apply on the company site.
About Cekura
Voice AI and Chat AI agents: Testing and Observability
Cekura helps Conversational AI companies with automated QA. From pre-production simulation and evaluations to production call monitoring, to assisting customers in setting up the CI/CD pipeline, we help in QA across the agent lifecycle. We are working with 75+ customers across healthcare, BFSI, logistics, recruitment, and retail. Some of the largest CCAS players and enterprises use Cekura to ship AI voice and chat agents reliably
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