AI Harness Engineer (Remote, Worldwide)

About the role

Join Tether as an AI Harness Engineer and help shape the future of local AI assistants. You will create innovative integrations that connect users to AI services, leveraging peer‑to‑peer technology to achieve limitless scale.

Key responsibilities

• Deliver new features and bug fixes with a focus on reliability, performance, and user satisfaction.
• Design and develop tools and modules that enable new AI capabilities across various model sizes.
• Maintain high code quality through coding standards, code reviews, and automated testing.
• Implement and evolve P2P technology for local AI deployments.

Required profile

• 5+ years of production software development experience, especially with P2P systems or AI/LLM tooling.
• Hands‑on experience building agent harnesses, including tool calling, agent loops, context management, and structured outputs.
• Experience creating evaluation and test infrastructure for non‑deterministic systems.
• Strong JavaScript/TypeScript skills and ability to model complex state.
• Open‑source contributions to P2P, networking, or AI tooling projects.
• Design expertise for failure scenarios such as network partitions, model errors, timeouts, and retries.

Required skills

• JavaScript
• TypeScript
• P2P systems
• AI/LLM tooling
• Agent harness development
• Test and evaluation infrastructure