3-8 years of full-stack engineering experience, particularly in early-stage startups or new product teams.
Proficient in TypeScript, Node.js, React, and Next.js, with experience in LLM APIs or agent SDKs.
Expertise in at least one area: agent state and memory, evaluations and guardrails, B2B2C architecture, or production voice/SMS agents.
Experience in making product decisions and conducting customer discovery without a dedicated product manager.
Valuable Python experience with real-time voice pipelines or evaluation tools, alongside strong computer science fundamentals.
Ability to thrive in ambiguous environments and adapt quickly during intense project phases.
Responsibilities
Own a domain from system architecture to daily production releases.
Engage with customers to gather feedback and make independent product decisions.
Build and optimize multi-channel AI agents for voice, SMS, and email.
Establish quality practices for non-deterministic systems, including evaluations and drift detection.
Develop across React and Next.js interfaces, Node.js backends, and Python services.
Benefits
Opportunity to shape a core product in an early-stage startup.
Direct interaction with customers to influence product direction.
Work in a dynamic environment with rapid iteration and innovation.
Engagement in cutting-edge AI technology and multi-channel communication.
Full Job Description
About the Role
Join an early-stage AI-powered sales automation startup as a Founding Engineer. You will own a core product or engineering domain, work directly with customers, and help shape multi-channel AI agents across voice, SMS, and email. What You'll Do
Own a domain end to end, from system architecture through daily production releases.
Join customer calls, gather feedback, and make product decisions independently.
Build and optimize multi-channel AI agents, including low-latency voice experiences and persistent conversation state.
Set quality practices for non-deterministic systems, including evaluations, prompt versioning, guardrails, and drift detection.
Work across React and Next.js interfaces, Node.js backends, and Python services.
What We're Looking For
Three to eight years of full-stack engineering experience, including experience shipping early-stage products at startups, as a founder, or on new product teams.
Strong production skills in TypeScript, Node.js, React, and Next.js, plus experience building with LLM APIs or agent SDKs.
Depth in at least one area: agent state and memory, evaluations and guardrails, B2B2C or marketplace architecture, or production voice and SMS agents.
Experience making product decisions, conducting customer discovery, and synthesizing feedback without a dedicated product manager.
Python experience with real-time voice pipelines or evaluation tools is valuable. Strong computer science fundamentals and experience with low-latency systems are also relevant.
Comfort with ambiguity, rapid iteration, and occasional intense periods around launches or major customer milestones.
Compensation & Benefits
Annual salary: $180,000 to $250,000. Visa sponsorship is not available. Location
On-site, five days per week in New York, New York, United States.
