Founding Technical Product Builder

Thorin; San Francisco (CA); On-site; USD 140,000 - 180,000; Full time

Benefits offered by this job

100% employer-paid medical, dental, &

401(k)

Wellness stipend

Transportation stipend

Lunch stipend

Coffee & snacks stipend

Developer tools budget

Prime SF office on Market Street

Weekly team dinners

Job summary

Thorin is seeking a Founding Technical Product Builder to bridge customers, engineering, and founders. You will identify valuable problems, prototype AI-native solutions, and ship products with a focus on AI agents, LLMs, and retrieval workflows.

This is ideal for a founder, founding PM, Product Engineer, or deeply technical PM who thrives in ambiguity and loves building AI-native products. You’ll influence architecture, tradeoffs, and success metrics from the start, shaping Thorin’s product

Qualifications

• 6–15 years building technical B2B SaaS products.
• Founder, Founding PM, First PM, Product Engineer, or early startup operator strongly preferred.
• Strong technical credibility; ideally Computer Science or similar engineering background.
• Experience with LLMs, agents, RAG, retrieval, evaluations, AI workflows, or AI UX.
• Outstanding customer discovery and product judgment.
• High agency and excitement for early-stage environments.

Responsibilities

• Partner directly with founders and customers to identify high-value problems.
• Translate ambiguous customer workflows into AI-native product experiences.
• Prototype ideas rapidly using AI before engineering investment.
• Work daily with engineers on architecture, implementation tradeoffs, and product decisions.
• Define success metrics and iterate quickly from customer feedback.
• Ship AI-native products using LLMs, agents, retrieval, workflows, and automation.
• Help establish Thorin’s product culture and quality bar.

Skills

Technical B2B SaaS product experience

Customer discovery

Startup/Founding experience

AI/LLM experience

Ambiguity handling

Cross-functional collaboration

Education

Computer Science or engineering background

Tools

LLMs

Agents

RAG

Retrieval

AI workflows

AI UX

Job description

About Thorin

Today’s enterprise software is better than ever, but most organizations still run on conversations rather than systems.

Critical work lives across Slack, email, meetings, documents, and people’s heads. Existing tools depend on humans to manually update records, push projects forward, and make sure important work doesn’t fall through the cracks.

We believe AI should do more.

Thorin is building proactive, long-horizon AI agents that continuously understand what is happening across an organization and help teams execute over weeks, months, and years. Rather than waiting for prompts, Thorin develops a living understanding of how a business actually operates.

Born out of 8VC’s Build program and backed by one of Silicon Valley’s strongest venture ecosystems, Thorin is building the operating system for the AI-native enterprise.

About the Role

We’re looking for a Founding Technical Product Builder who naturally sits between customers, engineering, and founders. You won’t inherit a roadmap. You’ll discover what should exist by talking directly with customers, rapidly prototyping ideas, partnering deeply with engineers, and shipping continuously. This is ideal for a former founder, founding PM, Product Engineer, or deeply technical PM who thrives in ambiguity and loves building AI-native products.

What You’ll Do

• Partner directly with founders and customers to identify high-value problems.

• Translate ambiguous customer workflows into AI-native product experiences.

• Prototype ideas rapidly using AI before engineering investment.

• Work daily with engineers on architecture, implementation tradeoffs, and product decisions.

• Define success metrics and iterate quickly from customer feedback.

• Ship AI-native products using LLMs, agents, retrieval, workflows, and automation.

• Help establish Thorin’s product culture and quality bar.

What We’re Looking For

• 6–15 years building technical B2B SaaS products.

• Founder, Founding PM, First PM, Product Engineer, or early startup operator strongly preferred.

• Strong technical credibility; ideally Computer Science or similar engineering background.

• Experience with LLMs, agents, RAG, retrieval, evaluations, AI workflows, or AI UX.

• Outstanding customer discovery and product judgment.

• High agency and excitement for early-stage environments.

Who Thrives Here

• Former founders.

• Founding PMs.

• Technical PMs who love building.

• Engineers who love product.

• AI-native builders.

Who This Role Is Not For

• Traditional roadmap PMs.

• Process-heavy coordinators.

• People needing detailed requirements.

• Leaders seeking mature organizations over early-stage building.

Benefits & Perks

• 100% employer-paid medical, dental, and vision coverage
• 401(k)
• $200/month wellness stipend
• $300/month transportation stipend
• $25/day lunch stipend
• $35/day coffee and snacks stipend
• $500/month developer tools budget
• Prime San Francisco office at Market Street & 3rd
• Weekly team dinners and social events