Platform Web Developer Engineer

Stealth AI Startup; San Francisco (CA); On-site; USD 130,000 - 238,000; Full time

Job summary

Join a forward-thinking company at the forefront of AI innovation as a Platform Web Developer Engineer. In this exciting role, you will be pivotal in building and maintaining a robust digital presence, including the marketing website and critical platform infrastructure. Your work will ensure seamless user experiences that reflect the quality of cutting-edge technology. As part of a dedicated team, you will contribute to creating comprehensive documentation and billing systems, all while optimizing performance and accessibility. This is a unique opportunity to shape the future of AI tools that enhance user engagement and satisfaction.

Benefits

Medical Insurance

Vision Insurance

401(k)

Paid Paternity Leave

Paid Maternity Leave

Qualifications

• Strong experience with modern web development frameworks.
• Ability to create clear and accessible developer documentation.

Responsibilities

• Design and develop the public website focusing on performance.
• Build and maintain authentication and identity management systems.

Skills

Web Development

API Documentation

User Authentication

Billing Interfaces

Performance Optimization

Education

Bachelor's Degree in Computer Science

Relevant Certifications

Tools

TypeScript

React

Next.js

Documentation Frameworks

Job description

Get AI-powered advice on this job and more exclusive features.

Current AI tools promise revolutionary capabilities but buckle under real-world demands. Noumena is creating the world's first full-stack intelligence system: a comprehensive AI platform that integrates and optimizes every layer from infrastructure to user experience. Unlike competitors who focus primarily on scaling model size, Noumena's approach is rooted in strategic specialization and system-level optimization.

Our product suite launching in Summer 2025 includes Noumena Coder: an intelligent coding assistant capable of deep refactors, multi-file PR planning, and long-range reasoning, all powered by our tailored routing across specialized models with 10M+ context lengths and adaptive compute scaling.

About the Role

We're hiring a Platform Web Developer Engineer to build and maintain our public-facing digital presence and critical platform infrastructure. You'll develop our marketing website, developer documentation, authentication systems, and billing platform, creating seamless experiences that reflect the quality of our underlying technology.

Responsibilities

• Design and develop Noumena's public website with a focus on performance, accessibility, and conversion
• Create comprehensive, user-friendly developer documentation and API references
• Build and maintain authentication and identity management systems across our product suite
• Develop scalable billing infrastructure to handle large transaction volumes and financial integrations
• Make strategic build vs. buy decisions, evaluating third-party solutions when appropriate
• Implement analytics and feedback systems to measure user engagement
• Design platform components that are composable and support various use cases
• Ensure compliance with security requirements and financial regulations

You May Be a Good Fit If You:

• Have strong experience with modern web development frameworks and techniques
• Excel at translating technical concepts into clear, accessible documentation
• Understand developer experience and what makes great API documentation
• Have experience building user authentication and billing interfaces
• Take ownership of your work and navigate ambiguity effectively
• Take a product-focused approach to building robust, user-friendly solutions
• Have a keen eye for design and user experience

Strong Candidates May Also Have Experience With:

• TypeScript, React, Next.js, and documentation frameworks
• Building payment interfaces and billing systems
• Identity and access management implementations
• Design systems implementation and maintenance
• SEO optimization and analytics integration
• Technical writing or creating developer education materials
• Performance optimization for global audiences

How We're Different

We're not just a research lab or just a product team—we're building a comprehensive AI platform that integrates and optimizes every layer from infrastructure to user experience. You'll be joining at the earliest stages of a company creating the AI tools we've all been promised but haven't yet experienced: tools that maintain context across complex projects, solve sophisticated problems without breaking, and actually improve with use rather than degrading.

Joining Noumena means helping build the magical experience users have been waiting for, starting with how they discover and understand our platform.

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Industries

  Software Development and Technology, Information and Internet

Referrals increase your chances of interviewing at Stealth AI Startup by 2x

Inferred from the description for this job

Medical insurance

Vision insurance

401(k)

Paid paternity leave

Paid maternity leave

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