AI Prompt Engineer — Design, Test & Ship Prompts

ParkWest; United States; Hybrid; USD 110,000 - 140,000; Full time

Benefits offered by this job

Extended health & dental

Mental health support

Generous PTO

13 paid holidays

Home office stipend

Job summary

ParkWest is building an AI practice at the intersection of strategy, creative, and engineering. We are hiring an AI Prompt Engineer to own prompt design and lifecycle across LLM-powered products, collaborating with strategists, designers, and engineers to transform fuzzy briefs into reliable AI systems.

You will design prompts, build evaluation harnesses, and partner with production teams on retrieval pipelines and guardrails to ship measurable AI features for operators.

Qualifications

• 2+ years hands-on with LLMs in production (prompts, agents, RAG, or fine-tuning)
• Fluency with at least two major model providers and their tool-use / structured-output APIs
• Strong written communication; prompts/specs read like documentation
• Comfort with Python or TypeScript for evals, scripts, pipelines
• Portfolio or writeups of AI systems shipped, with failure-mode discussions
• Experience with eval frameworks (Braintrust, Promptfoo, LangSmith, Ragas) and tracing tools
• Background in linguistics, technical writing, or applied ML research
• Experience shipping agentic systems with multi-step tool use in production

Responsibilities

• Design, version, and document prompts and agent workflows across client and internal products
• Build evaluation harnesses with golden sets, rubrics, and automated graders
• Partner with engineering on retrieval pipelines, tool use, function calling, and guardrails
• Benchmark model providers on cost, latency, and quality per use case
• Translate client workflows into structured prompts, schemas, and fallbacks engineers can ship
• Own prompt lifecycle: monitor production traces, debug regressions, and ship improvements weekly

Skills

LLM production

Multiple model providers

Technical writing

Python/TypeScript

Portfolio of AI systems

Eval frameworks

Linguistics background

Agentic systems

Tools

Braintrust

Promptfoo

LangSmith

Ragas

Job description

ParkWest is building an AI practice at the intersection of strategy, creative, and engineering. We are hiring an AI Prompt Engineer to own prompt design and lifecycle across LLM-powered products, collaborating with strategists, designers, and engineers to transform fuzzy briefs into reliable AI systems.

You will design prompts, build evaluation harnesses, and partner with production teams on retrieval pipelines and guardrails to ship measurable AI features for operators.