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Harnham | Founding Frontend Engineer

4 weeks ago


new york city, United States Harnham Full time

FOUNDING FRONTEND ENGINEER

TECHNOLOGY

WILLIAMSBURG, NY (ON-SITE)

$200,000-$250,000 + EQUITY


THE COMPANY

We’re partnering with an early-stage startup focused on building open-source infrastructure to optimize LLM applications. Their innovative platform enables a feedback loop for improving production data, creating smarter, faster, and more cost-effective models. By unifying inference, observability, optimization, and experimentation, they empower cutting-edge workflows for complex multi-step LLM applications—all while maintaining blazing-fast performance.


THE ROLE – FOUNDING FRONTEND ENGINEER

As the Founding Frontend Engineer, you'll build the platform from the ground up, focusing on optimization, evaluation, observability, and integrations. Key responsibilities include:

  • Build new features and workflows from scratch (0-1) in React/TypeScript.
  • Develop the frontend architecture for the platform, ensuring it’s optimized for scalability and performance.
  • Collaborate closely with the cofounders to design and implement innovative solutions for complex AI-driven challenges.
  • Tackle unique product design challenges related to massive data processing and programmatic interfaces.


SKILLS AND EXPERIENCE

  • Proven experience building new features or systems from the ground up (0-1).
  • Expertise in React and TypeScript.
  • Experience in startup environments.
  • Contributions to open-source projects are highly preferred.
  • A portfolio of past work is a plus but not required.
  • Familiarity with RemixJS, TailwindCSS, or product/UI design.
  • Experience with Rust for backend development.


BENEFITS

This role offers a competitive base salary of $200,000 - $250,000, alongside significant equity.


HOW TO APPLY

Express your interest by sending your resume directly to Malia Jalbert via the application link below.


KEYWORDS

Frontend Engineer, Founding Engineer, React, TypeScript, Open Source, 0-1 Development, LLM Optimization, AI Workflows, Product Design, Programmatic Interfaces, RemixJS, TailwindCSS, Rust, Startups