Software Engineer, AI

Harnham; San Francisco (CA); Hybrid; USD 225,000 - 275,000; Full time

Job summary

Harnham is looking for a Product Engineer in San Francisco, CA (Hybrid) to join a rapidly scaling AI company. The role requires a strong product sense and the ability to navigate ambiguity to rapidly prototype and launch AI-native applications.

Ideal candidates will have 3-7 years of experience, strong communication skills, and a demonstrated track record in building impactful AI solutions. Applicants must be authorized to work in the U.S. without sponsorship.

Qualifications

• 3-7 years of experience in a relevant field.
• Experience rapidly building and shipping applications.
• Strong understanding of AI and LLMs.

Responsibilities

• Partner with enterprise customers to understand workflows.
• Rapidly prototype and launch AI applications.
• Collaborate across teams to translate learnings into features.
• Contribute to an iterative, experimentation-driven culture.

Skills

Product sense

Customer empathy

Rapid application development

AI-native development mindset

Excellent communication

Collaboration skills

Problem-solving in ambiguity

Tools

Claude Code

Codex

Cursor

Job description

Location & Compensation

San Francisco, CA (Hybrid) – local candidates only; relocation not offered.

Salary: Up to $250,000

Overview

We’re partnering with a well‑funded, rapidly scaling AI company redefining how enterprise brands leverage AI to drive measurable business outcomes. The team builds AI‑native products that sit directly within critical customer workflows, helping enterprise organizations automate high‑cost operational processes, improve customer experiences, and rapidly experiment at scale. Backed by top‑tier investors with strong revenue traction and significant enterprise demand, the company is entering its next phase of growth and looking for highly technical, product‑minded engineers who thrive in fast‑moving environments.

The Opportunity

This role is ideal for builders who love ambiguity, customer interaction, rapid prototyping, and turning ideas into production‑ready solutions quickly. You’ll work directly with enterprise customers, product leaders, and engineering teams to identify high‑impact opportunities and rapidly build AI‑driven workflows, proofs of concept, and applications that solve real business problems. The environment is highly AI‑native; engineers are expected to leverage modern AI tooling extensively throughout the development lifecycle. Speed, adaptability, product intuition, and execution matter more than rigid adherence to specific technologies. If you enjoy shipping fast, owning outcomes, and operating close to customers, this is the type of role where you can have outsized impact.

What You’ll Do

• Partner directly with enterprise customers to deeply understand workflows, pain points, and business objectives.
• Rapidly prototype and launch AI‑powered applications and workflow automations.
• Build MVPs and proof‑of‑concepts in days, not months.
• Collaborate cross‑functionally with product, engineering, and customer stakeholders.
• Translate customer learnings into scalable platform capabilities and reusable product features.
• Help shape how AI‑native software products are built and deployed within enterprise environments.
• Contribute to a highly iterative, experimentation‑driven engineering culture.

What They’re Looking For

• Strong product sense and customer empathy.
• Ability to operate independently with high ownership and urgency.
• Comfortable navigating ambiguity and solving undefined problems.
• AI‑native development mindset with strong leverage of tools like Claude Code, Codex, Cursor, or similar.
• Experience rapidly building and shipping customer‑facing applications or internal tooling.
• Excellent communication and collaboration skills.
• Curiosity, adaptability, and a bias toward action.

Ideal Backgrounds

• Solutions Engineering / Sales Engineering.
• Early‑stage startup engineering.
• Founders or former founders.
• Engineers from B2B AI companies.
• Candidates who have already embraced AI‑driven development workflows.

Preferred Experience

• ~3‑7 years of experience, though exceptional candidates with less experience will absolutely be considered.
• Demonstrated track record of building impactful products quickly.
• Experience working closely with customers or external stakeholders.
• Strong understanding of modern AI/LLM application development.

Why Join

• Opportunity to join an elite, high‑caliber engineering team early.
• Strong product‑market fit with accelerating enterprise demand.
• Significant ownership and visibility.
• Backed by substantial funding with multi‑year runway.
• Hybrid environment with a growing San Francisco engineering presence.
• Chance to help define the future of AI‑native enterprise software.

Applicants must be legally authorized to work in the United States without current or future employer sponsorship.