Job Details

A high-growth, innovative startup is looking for a Founding Engineer to build software focused on understanding how LLMs form opinions about companies, products, and information online.

You'll work across product, research, and infrastructure, owning problems end-to-end, from identifying customer insights to shipping production systems. As an early engineer, you'll have significant ownership in shaping the product, architecture, and engineering culture. This role focuses on building systems that analyze model behavior, uncover the sources and reasoning behind responses, and help organizations better understand and influence those outcomes.

If you're excited about LLMs, interpretability, agentic systems, and building entirely new types of developer tooling, this role offers the chance to work at the frontier of how AI systems interact with real-world information.

What You'll Do

• Build full-stack product features from concept to production
• Design systems that probe and analyze LLM behavior at scale
• Develop tooling to understand model reasoning patterns, sources, and biases
• Build infrastructure for large-scale model testing and experimentation
• Work closely with customers to translate insights into product capabilities
• Collaborate with leadership on product direction and technical architecture
• Help define best practices for AI-assisted and agentic development workflows

What You Bring

• 3+ years of professional software engineering experience
• Strong full-stack development skills
• Experience with React, Python, AWS, and Terraform
• Comfort working across frontend, backend, and infrastructure
• Ability to own problems from idea to shipped product
• Curiosity about how large language models behave and how they can be studied or influenced

Nice to Have

• Experience building LLM-powered or agentic systems
• Background in machine learning, NLP, or AI tooling
• Startup experience or self-driven technical projects
• Experience speaking directly with customers to inform product development

Why This Role Is Interesting

• Work on new technical challenges around analyzing and interacting with AI systems
• Help shape the early engineering culture at a fast-moving startup
• Build systems at the intersection of AI research, developer tooling, and real-world applications
• Significant ownership over product direction and technical architecture