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Founding Engineer

Kaizen | San Francisco, California, United States | 3w ago
$160,000 – $235,000/yr| full-time | on-site | lead | 0–6 years
skills: typescript, react, node.js, distributed systems, concurrency, performance optimization, ui development, api development, playwright, selenium, puppeteer, devtools protocol, llms, prompt engineering, ai/ml

As a Founding Engineer, you'll architect and build the core systems that power browser automation at scale — then make them accessible through beautiful, intuitive interfaces. You'll work directly with customers, shape product direction, and own critical infrastructure that processes millions of automated interactions.

What You'll Build

  • Browser orchestration systems that handle complex authentication, anti-bot measures, and session management across thousands of websites
  • AI-powered automation engines that understand and interact with web applications using natural language instructions
  • Enterprise-grade infrastructure supporting real-time, critical automation workflows
  • Developer tools and APIs that make complex automation feel approachable — dashboards, debugging tools, and workflows that just work
  • Polished user interfaces that turn technical complexity into experiences business users can understand and trust

We're Looking For

  • 2-6 years of experience building production systems and user-facing features
  • Systems thinking - you understand distributed systems, concurrency, and performance optimization
  • Full-stack expertise - strong with TypeScript, React, Node.js, and modern web technologies
  • Frontend + design sense - you can build UIs that don't just work, but feel great to use. You understand that good design is good business
  • Product mindset - you talk to customers, understand their pain, and ship solutions that solve real problems
  • High agency - you identify problems and fix them without being asked

Bonus Points

  • Design background or strong visual/UX sensibilities - you know what good product design looks like
  • Browser automation experience with tools like Playwright, Selenium, or Puppeteer
  • Knowledge of browser internals, DevTools Protocol, or anti-detection techniques
  • Background in AI/ML, particularly LLMs, prompt engineering, or evals
  • Previous startup experience or experience building successful developer tools
  • Vertical domain knowledge in logistics, healthcare, or financial services

What We Offer

  • Significant equity in a fast-growing company targeting a massive market
  • Direct customer impact - your code will automate workflows for major enterprises
  • Learning environment - work closely with experienced founders and world-class advisors
  • Competitive compensation - $160K-$235K base salary plus equity
  • Full benefits - health, dental, vision, unlimited PTO
  • San Francisco office - collaborate in-person with the team

Benefits

equity · health insurance · dental insurance · vision insurance · unlimited pto
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