AI Platform Architect: Design Workflow Innovator

Harnham; San Francisco (CA); On-site; USD 180,000 - 240,000; Full time

Job summary

Harnham in San Francisco seeks an experienced software engineer to define and scale AI systems across our design platform. You will own AI architecture, ship production-grade LLM features, and drive end-to-end pipelines from prompting to evaluation.

Join a fast-paced team building real-time AI experiences with context-aware code generation and intelligent suggestions. You’ll collaborate closely with product, design, and engineering to deliver high-impact features.

Qualifications

• 5+ years of software engineering experience.
• 2+ years working with LLM APIs and prompt engineering in production.
• Strong proficiency in TypeScript or Node.js and Python.
• Experience with LLM evaluation, benchmarking, and performance measurement.
• Hands-on experience with fine-tuning (LoRA, full fine-tuning, distillation).
• Experience building agent-based AI systems.
• Ability to own systems end-to-end in a fast-paced environment.

Responsibilities

• Own AI architecture and technical direction across the product.
• Build and ship production-grade LLM features with clear quality and performance metrics.
• Design and optimize AI pipelines across prompting, retrieval, agents, and evaluation.
• Lead development of agentic systems and multi-step tool use workflows.
• Establish standards for model evaluation, benchmarking, and observability.
• Partner closely with product, design, and engineering to ship high-impact AI features.

Skills

TypeScript

Python

LLM APIs

Prompt engineering

Agent-based AI

Software architecture

Tools

LoRA

Full fine-tuning

Distillation

Job description

Harnham in San Francisco seeks an experienced software engineer to define and scale AI systems across our design platform. You will own AI architecture, ship production-grade LLM features, and drive end-to-end pipelines from prompting to evaluation.

Join a fast-paced team building real-time AI experiences with context-aware code generation and intelligent suggestions. You’ll collaborate closely with product, design, and engineering to deliver high-impact features.