Fullstack Engineer; Backend, AI

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We’re ui Agent. We just raised our seed round and we’re building a world-class team to reinvent accounting through AI Agents. With real revenue, rapid growth, and a massive market ahead, we’re now looking for an exceptional Fullstack Engineer (Backend, AI) to join us —owning key pieces of the product and setting the culture for years to come.

Why this role?

You’re not just joining as another dev. As a Fullstack Engineer (Backend, AI), you’ll be at the core of what we build, ship, and scale. You’ll work side-by-side with founders and a small, elite team on real product and technical decisions. You’ll see your work go live fast and make a real impact for our customers—and for the business.

What you’ll do:

• Architect, design, and build mission-critical features end-to-end (front and back)
• Ship, own, and iterate on production code (Python, Node.js, React)
• Integrate state-of-the-art AI/ML models (think Lang Chain, open-source LLMs, etc.)
• Work closely with founder on technical strategy, product roadmap, and scaling decisions
• Shape and mentor the engineering culture—code quality, reviews, process

Who you are:

• Our stack is Python, React, Node.js, Postgres, and AWS
• Strong communication skills with a variety of stakeholders
• Deep understanding of system design, architecture, and microservices
• Experience shipping zero-to-one products and iterating rapidly
• Passion for clean, scalable code and a bias for action
• Hungry to learn and experiment with new tools (especially in AI/ML)
• Entrepreneurial mindset: you take ownership, push through ambiguity, and love building with others

How we work:

• We’re founder-led and flat—your ideas and code will directly shape the product
• We move fast, joke often, and genuinely enjoy building together
• No side projects, no distractions—full focus on building ui Agent
• Located in Manhattan
• No remote work / only on-site

What you get:

• Top-tier salary ($100k–$200k base) + significant early equity
• Direct access to founders and major product decisions
• Opportunity to build and lead as we scale the engineering team

Ready to do the best work of your career?

If you’re hungry to build, ready to own, and want to help shape a world-class company from the ground up, we want to meet you.

Apply now. Let’s make history together.

• Mid-Senior level

• Full-time

• Engineering and Information Technology

• Software Development

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