# Backend Engineer at Hark

- Company: Hark
- What the company does: At Hark, we are building the most advanced personal intelligence in the world.
- Company website: https://hark.com
- Type: Startups
- Level: Mid level
- Location: San Jose
- Work setup: On-site
- Pay: $170K to $400K base salary per year (USD)
- Posted: 2026-03-23
- Apply by: 2026-10-08
- Apply: https://job-boards.greenhouse.io/hark/jobs/4193725009
- Page: https://www.1752.vc/careers/jobs/hark-backend-engineer/

## About the role

You'll build the backend systems that make Hark's AI agent actually work — reliable, fast, and production-grade. That means the hard infrastructure problems: high-concurrency services, low-latency streaming, state management for long-running agent workflows, and the execution layer that connects model outputs to real-world actions. You are building the nervous system of an agentic product.

## What they're looking for

- Backend & Systems Mastery: 5+ years of experience building mission-critical backend systems. You are an expert in concurrency, networking protocols, and distributed systems
- Production at Scale: Proven track record of shipping APIs and infrastructure that handle real-world traffic, with a deep understanding of horizontal scaling and "day 2" operations
- AI System Intuition: Experience integrating LLMs into backend pipelines. You understand the unique failure modes of non-deterministic systems and how to wrap them in deterministic, reliable code
- Language Proficiency: Strong experience in at least one systems-level language (e.g., Go, Rust, C++, or Java)
- Infrastructure Mindset: Comfort with cloud-native architectures (AWS/GCP), container orchestration, and building secure, isolated execution sandboxes
- Technical Communication: Ability to articulate complex architectural tradeoffs and collaborate with model researchers to bridge the gap between AI and production-grade software

Tags: Product Engineering