Senior AI Engineer – LLMs & Backend Systems

San Francisco

Published 1 day ago

Job Title: Founding AI Engineer

Location: San Francisco, CA (On-site; relocation assistance available)
Compensation: $200,000–$400,000 + 0.5%–3% equity
Visa: Sponsorship available for most types

About the Role

We’re hiring a Founding AI Engineer to join our startup’s core team. We are seeking a Founding AI Engineer to help design, build, and launch a multi-agent AI system that will redefine the future of talent evaluation. You’ll join at a pivotal growth stage — our AI-powered platform already serves millions of users and generates strong recurring revenue. This is an opportunity to make a massive impact on both the product and company trajectory from day one.

We’re looking for a builder at heart who thrives in fast-moving environments, takes ownership, and can ship production-ready AI products. You should be equally skilled at architecting large-scale backend systems, fine-tuning LLM-driven workflows, and delivering features that impact millions of users.

Key Responsibilities

  • Build and scale production AI agents and workflows from 0 → 1.
  • Architect large-scale backend systems using Python and TypeScript.
  • Ship high-impact features quickly, with full ownership of your work.
  • Leverage AI coding tools (e.g., Cursor, Cloud Code) to accelerate delivery.
  • Collaborate directly with founders to shape technical and product direction.

Requirements

  • 2–8 years of software engineering experience, including shipped large-scale LLM/agent systems.
  • Experience as a founder, founding engineer, or early engineer at a Seed–Series B startup.
  • Some large-tech experience working on complex, scalable systems.
  • Strong skills in Python, TypeScript, infrastructure, and LLM/agent system design.
  • Strong communication skills to explain technical trade-offs.
  • Proven builder DNA — hackathon wins, notable open-source contributions, or personal projects.

Preferred Qualifications

  • Degree in Computer Science, AI, or a related technical field from a top-tier institution.
  • Track record of successfully delivering products at scale in AI or related fields.
  • Demonstrated experience using AI developer tools to enhance productivity.

Benefits

  • Competitive base salary ($200k–$400k) + generous equity (0.5%–3%).
  • Visa sponsorship available for most types.
  • Relocation assistance to San Francisco.
  • Opportunity to define technical strategy and shape a product used by millions.
  • Work in a high-growth, venture-backed environment with a culture of rapid innovation.

Apply today by filling out the application. Please contact Imani Tolbért at tolbert@heavenandhire.com for immediate consideration.

Job Type: Full-time

Pay: $200,000.00 - $400,000.00 per year

Benefits:

  • 401(k)
  • Dental insurance
  • Flexible schedule
  • Health insurance
  • Paid time off
  • Vision insurance

 

Education:

  • Bachelor's (Required)

 

Experience:

  • software engineering: 2 years (Required)
  • Python: 2 years (Required)
  • TypeScript: 2 years (Required)
  • System design: 2 years (Required)

 

Ability to Commute:

  • San Francisco, CA 94114 (Required)

 

Ability to Relocate:

  • San Francisco, CA 94114: Relocate before starting work (Required)

 

Work Location: In person

Full time

Mid-Senior Level

San Francisco