Senior Prompt Engineer

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Postscript

πŸ’΅ $135k-$153k
πŸ“Remote - Worldwide

Summary

Join Postscript as a Senior Prompt Engineer and lead the development of best-in-class prompt engineering practices across our AI-powered product suite. You will set standards, guide prompt development, mentor others, and craft high-impact prompts. This player/coach role offers growth into formal leadership. You'll design, test, and refine prompts for exceptional AI features. The role requires 8-10 years of experience in marketing technology, preferably in ecommerce, AI/ML, or conversational commerce. Postscript is a high-growth, 100% remote company offering competitive compensation and benefits. The company is backed by top investors and is trusted by thousands of ecommerce stores.

Requirements

  • 8-10 years of experience in marketing technology required, with a strong preference for the ecommerce sector, AI/ML, conversational commerce
  • Background in Martech Sales/Solutions Engineering, Customer Success, Marketing Strategy, or Product Management
  • Deep recent expertise in LLMs and prompt engineering, with hands-on experience writing prompts and executing evals
  • Proven track record of shipping 0-to-1 products
  • Ability to balance hands-on work with leadership responsibilities (player/coach)
  • Strong collaboration and communication skills, with the ability to influence across product, design, engineering, and AI teams
  • Analytical and user-centered, with a track record of using data to improve prompt effectiveness
  • Growth-oriented, eager to step into greater leadership as our AI footprint grows
  • Strong curiosity and learning mindset about the evolving LLM ecosystem and emerging best practices

Responsibilities

  • Design, write, and optimize prompts for our LLM-powered products, ensuring high-quality, safe, and effective experiences
  • Ensure prompts perform consistently across multiple models and pass P0/P1 eval standards
  • Own the structure of our core agent and supervisor systems so they can extend to new channels, surfaces, and use cases
  • Define and improve prompt engineering standards, best practices, and review processes
  • Determine what contextual information needs to be injected into prompts and at what level of fidelity to optimize model performance across use cases - including working with engineering to design, test, and maintain structured context injection pipelines that enable high-quality outputs at scale
  • Use Freeplay for prompt evals, challenger/champion testing, and optimization
  • Set up and manage the process for testing challenger prompts against champion prompts in production (e.g., optimizing for revenue per subscriber while maintaining or improving unsubscribe rates and sentiment baselines)
  • Operate and communicate effectively across all teams leveraging AI, serving as a unifying voice for prompt quality
  • Mentor prompt engineers and cross-functional contributors (PM, design, engineering) on AI interaction design
  • Drive cross-team collaboration around AI behavior, safety, and user experience standards
  • Stay hands-on with product teams to ship and improve AI-powered features
  • Shape the roadmap for scaling prompt engineering across products and teams
  • Stay current with emerging LLM techniques, tools, and practices, and drive their adoption across the organization

Preferred Qualifications

  • Entrepreneurial experience and/or technical background (engineering, data science, or similar) is a bonus
  • Experience defining standards, setting a bar for excellence, and mentoring others in AI interaction design, including eval creation and iteration

Benefits

  • Salary range of USD $135,000-$153,750 base plus equity (we do not have geo based salaries)
  • High growth startup - plenty of room for you to directly impact the company and grow your career!
  • Work from home (or wherever)
  • Fun - We're passionate and enjoy what we do
  • Competitive compensation and opportunity for equity
  • Flexible paid time off
  • Health, dental, vision insurance

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