Founding Engineer - Full Stack

Sperton Global AS • Village of Highland Falls, NY

3d • Onsite

About The Position

We are seeking 1-2 "Founding Engineers" to join one of our client's team on full-time onsite basis. Our client's company is a rapidly scaling venture-backed startup helping companies discover and change how AI models perceive brands—essentially applying psychology to LLMs to drive leads and influence content, pricing, and product strategies. As a Founding Engineer, you will help to address bandwidth issues, expand core product features, and build the future of AI interpretability. This role requires high independence, exceptional communication skills, and the ability to own features end-to-end—from initial research and infrastructure to shipped product.

Requirements

• 1–5 years of full-stack engineering experience
• Mandatory proficiency in Python and React
• Backend and infrastructure experience is heavily prioritized over frontend design.
• Prior experience with agentic AI systems and LLMs is required.
• Exceptional communication skills
• Strong problem-solving abilities
• Independence
• A low-ego, team-oriented mindset

Nice To Haves

• Previous startup experience
• Non-traditional backgrounds
• Familiarity with Terraform, AWS, and modern tooling

Responsibilities

• Build and extend a universal context management platform that powers agentic workflows across customer data, communications, and deliverables.
• Apply black-box AI interpretability techniques to reverse-engineer how LLMs form opinions about brands and their competitors.
• Take full ownership of features from understanding customer needs through research, infrastructure, and production deployment.
• Help define new engineering team patterns and practices around agentic coding tools (such as Claude Code).
• Build internal automation and custom software for clients using AI agents with full company context.

Benefits

• Competitive base salary
• 0.3% – 1.5% equity
• Support for O-1 transfers
• Support for H-1B transfers (providing a letter of support for existing visa holders)

What This Job Offers

• Job Type: Full-time
• Career Level: Entry Level
• Education Level: No Education Listed