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# AI Harness Engineer

- **Company:** Tether Operations Limited
- **Location:** Belgium (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** JavaScript (Programming Language), Artificial Intelligence, Automation of Tests, Code Review, TypeScript, Large Language Models, Free and Open-Source Software, Software Coding
- **Published:** October 15, 2026
- **Apply:** https://startup.jobs/ai-harness-engineer-100-remote-worldwide-job-tether-operations-limited-10455525

## About the Role

* 5+ years building production software, with deep experience in P2P systems, AI/LLM tooling, or both.
 * Hands-on experience building agent harnesses, including tool calling, agent loops, context management, and structured outputs.
 * Experience building evals and test infrastructure for non-deterministic systems.
 * Strong JavaScript/TypeScript, with experience modelling complex state, from sync protocols to agent loops
 * Open-source contributions to P2P, networking, or AI tooling projects
 * Experience designing for failure, including network partitions, model errors, timeouts, and retries

## Description

* Deliver new features and bug fixes with a focus on reliability, performance, and user satisfaction
 * Design and develop new tools and modules, enabling new AI capabilities while ensuring success of a wide variety of model types and sizes
 * Maintain high codebase quality through consistent coding standards, code reviews, and automated testing
 * Implement and develop P2P technology for use with local AI