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Inflection AI Logo Inflection AI · IT - Software Development

Web Fullstack Architect

United States, Palo Alto 200000.00 - 300000.00 USD / Year · Job Posted January 13, 2026
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Job Description

As a Principal Fullstack Architect for Pi, you will own the technical architecture and execution of our end-to-end product experience—from a highly scalable React and Next.js frontend to performant, reliable backend systems that power AI-driven interactions. This is a deeply hands-on role for an experienced engineer who leads by example, writes production code daily, and sets a high bar for engineering quality. You will partner closely with product, design, backend, and ML teams to evolve Pi’s architecture, ensure long-term maintainability, and mentor engineers as we scale a product used by millions of people worldwide.

Job Responsibility

  • Own and evolve the end-to-end architecture for Pi’s web product, spanning frontend, backend services, and supporting infrastructure
  • Write high-quality, production code across the stack, with a strong focus on React, Next.js, TypeScript, and modern backend frameworks
  • Set and enforce best practices for code quality, system design, testing, performance, and reliability through hands-on leadership and reviews
  • Collaborate closely with backend and ML engineers to design APIs, data models, and workflows for low-latency, AI-powered experiences
  • Make pragmatic architectural decisions that balance speed, scalability, cost, and long-term maintainability as the product grows
  • Mentor and guide engineers across the team, helping them improve technical judgment, system design skills, and ownership
  • Identify technical risks early and influence product and engineering roadmaps with clear tradeoff analysis
  • Improve developer experience through better tooling, CI/CD, observability, and operational practices

Requirements

  • 10+ years of professional software development experience, including senior, staff, or principal roles in fast-moving or high-growth environments
  • Strong hands-on experience building full-stack systems at scale, with deep expertise in modern frontend technologies (React, Next.js, TypeScript)
  • Solid backend experience in Python (FastAPI/Django) and/or Node.js, including API design, async workflows, and background processing
  • Proven track record in building and operating products used by thousands to millions of users in production
  • Experience designing and evolving system architectures over time, from early MVPs to large-scale, modular systems
  • Familiarity with cloud infrastructure (AWS, GCP, or Azure), containerized deployments, and production operations
  • Ability to collaborate effectively with product, design, and ML teams to turn ambiguous ideas into shipped features
  • Have a bachelor’s degree or equivalent in a related field to the offered position requirements

What we offer

  • Diverse medical, dental and vision options
  • 401k matching program
  • Unlimited paid time off
  • Parental leave and flexibility for all parents and caregivers
  • Support of country-specific visa needs for international employees living in the Bay Area
  • Equity component
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