Senior/Staff Backend Engineer

**Role:** Senior/Staff Backend Engineer HRforGrowth® is engaged as the talent acquisition partner to conduct this search on behalf of a client organization that is hiring for this role. HRforGrowth is not the employer for this position. HRforGrowth identifies, evaluates, and presents top\-tier candidates through its global talent acquisition practice; all employment decisions — including final selection, offer terms, compensation, and conditions of employment — are made solely by the hiring organization. Our Client is seeking a highly experienced Senior/Staff Backend Engineer with 5\+ years of experience to help build and scale large\-scale infrastructure for conversational AI. This position is ideal for an engineer who has built or been a core contributor to a database, queue, or large\-scale data system and has a strong understanding of distributed systems and infrastructure. The successful candidate will play a critical role in scaling simulation infrastructure from 30K to 200K\+ concurrent voice agent calls while helping build a purpose\-built database for conversational AI. The ideal candidate will be AI\-native, strongly biased toward action, comfortable operating in a fast\-paced startup environment, and experienced in scaling infrastructure under real production workloads. **Location:** Remote **Job Type:** Full\-Time **Compensation:** $160,000 – $240,000 per year **Equity:** 0\.2% – 1\.0% **Visa Sponsorship:** Not available; U.S. Citizens and Green Card Holders only Key Responsibilities Design and implement storage structures, query paths, and retrieval systems that operate efficiently at scale. Scale simulation infrastructure from 30K to 200K\+ concurrent calls while architecting for graceful degradation and 99\.99% uptime. Own core backend services using TypeScript/Node.js and Python. Build backend systems that orchestrate LiveKit, Temporal, STT/TTS, and LLM tooling for real\-time voice agents. Harden production monitoring pipelines so telephony events, recordings, and outcomes propagate... **INDEED INTERNAL TEST JOB:** Please note that this is a test job used to test the Indeed Apply production system. This is NOT A REAL JOB and you are requested not to apply for the job