Founding Engineer

Kaizen | San Francisco, California, United States | 2mo ago

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Original posting (closed) below

$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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