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Founding AI Engineer

Upriver

Upriver

Software Engineering, Data Science
Posted on Feb 23, 2026

Founding AI Engineer

We’re looking for a Founding AI Engineer to build and define the research function at Upriver from zero. This is a rare opportunity to work on some of the hardest unsolved problems in applied AI and agents, with massive ownership, visibility, and room to grow into leadership quickly.

What You'll Do

  • Lead the AI domain at Upriver: Take ownership of our agent architecture and help define its next phases, standards, and direction.

  • Solve hard, unsolved problems: Work on challenges in AI agents, reasoning over complex systems, and autonomous decision-making that don’t yet have clear playbooks.

  • Build production AI: Design, implement, evaluate, and deploy AI systems used by real customers.

  • Be outward-facing: Publish technical blogs, benchmarks, and papers; represent Upriver in the AI and data community.

  • Move fast with autonomy: Own problems end-to-end with minimal guidance, working directly with founders.

  • Deliver real customer value end-to-end: take features from idea to production, see them used by customers, and iterate based on real-world impact.

What We're Looking For

  • Strong background in AI / ML (applied research, systems, or both).

  • Experience building or experimenting with hands-on software development.

  • Comfortable operating independently and making foundational technical decisions.

  • Strong communication skills and interest in writing, publishing, and sharing work publicly.

  • High ambition and desire to grow into a technical leadership role.

  • Extra: Hands-on experience experimenting with large language models (LLMs),

Why Upriver

  • Define a new category: Be part of a team figuring out how AI agents actually work inside real data platforms, and build a category leader product.

  • High ownership, high trust: You’ll make real architectural and product decisions early on.

  • Top-tier team: Work with exceptional engineers at a very high bar.

  • Join at the inflection point: Strong early traction, a fresh seed round, and the opportunity to grow rapidly with the company as it scales.