AI Harness Engineer (100% Remote, Worldwide)
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 2d ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 15d ago
The date the source published, not the day we noticed it (2026-09-25). Last seen at its source 2h ago.
We have tracked this listing since 5 Oct 2026 (5 days). The employer's own board has carried it every time we have read it, most recently 2 hours ago.
Is it remote?
Marked remote on the employer's board
Their board carries a remote setting on this posting — a field they filled in, not wording we read. The location field names somewhere specific, which is usually where the team or the entity sits.
Who may apply?
Denmark, Sweden, Austria
The description states no restriction of its own. This is the source's own tag.
Pay not stated
Similar roles pay $130k–208.2k/yr
Middle 50% of 140 listings that do state pay — Engineering · all levels · EMEA · USD/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
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Recruitee employer's own board first seen 5d ago · last seen 2h ago
The listing
Join Tether and Shape the Future of Digital Finance
At Tether, we’re not just building products, we’re pioneering a global financial revolution. Our cutting-edge solutions empower businesses—from exchanges and wallets to payment processors and ATMs—to seamlessly integrate reserve-backed tokens across blockchains. By harnessing the power of blockchain technology, Tether enables you to store, send, and receive digital tokens instantly, securely, and globally, all at a fraction of the cost. Transparency is the bedrock of everything we do, ensuring trust in every transaction.
Innovate with Tether
Tether Finance: Our innovative product suite features the world’s most trusted stablecoin, USDT, relied upon by hundreds of millions worldwide, alongside pioneering digital asset tokenization services.
But that’s just the beginning:
Tether Power: Driving sustainable growth, our energy solutions optimize excess power for Bitcoin mining using eco-friendly practices in state-of-the-art, geo-diverse facilities.
Tether Data: Fueling breakthroughs in AI and peer-to-peer technology, we reduce infrastructure costs and enhance global communications with cutting-edge solutions like KEET, our flagship app that redefines secure and private data sharing.
Tether Education: Democratizing access to top-tier digital learning, we empower individuals to thrive in the digital and gig economies, driving global growth and opportunity.
Tether Evolution: At the intersection of technology and human potential, we are pushing the boundaries of what is possible, crafting a future where innovation and human capabilities merge in powerful, unprecedented ways.
Why Join Us?
As an AI Harness Engineer, you’re not just building integrations for AI —you’re developing new and innovative ways to connect people to local AI, and how that AI will become a fixture in our lives. You will push QVAC to new levels, using P2P technology to enable limitless scale, making you essential to the company’s success in the competitive local AI assistant market.
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
Strong competency in writing modular, maintainable code.
Experience creating and managing reusable npm modules.
Solid skillset in testing & debugging.
Strong understanding and comfort with developing and using AI tools.
Deep interest or experience with P2P technologies or distributed systems.
Comfort working in a remote, globally distributed team; good communication skills.
Hacker who never stops experimenting.
Qualifications
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