Principal Software Engineer, Money Infrastructure

Replit Replit · Enterprise · Foster City, CA · Hybrid · Engineering

This Principal Product Engineering role focuses on Replit's Money Infrastructure, building and scaling the financial systems that power the platform's revenue, builder monetization, and agent transactions. The role involves designing and implementing systems for pricing, billing, payments, and monetization, ensuring reliability, correctness, and user-friendly experiences.

What you'd actually do

  1. Lead the design, architecture, and implementation of Replit’s core money infrastructure, spanning pricing, billing, payments, and monetization.
  2. Own and scale the global order-to-cash foundation supporting credit-based subscriptions, usage-based billing, marketplaces, in-app payments, and commerce for Agents.
  3. Enable rapid pricing and packaging experimentation across the company by building flexible abstractions and APIs for new SKUs, plans, and monetization models.
  4. Build high-converting, localized payment experiences across geographies — thinking globally while enabling users to pay locally.
  5. Power builder monetization by creating payment rails for apps, Agents, subscriptions, and new monetization primitives.

Skills

Required

  • 8+ years of professional software engineering experience, with strong backend expertise
  • Hands-on experience building or operating at least one of the following: Subscription or recurring billing platforms, Usage-based or metered billing systems, Payment processing platforms, SaaS taxation or compliance systems, Tokenization or credits-based systems
  • Strong system design skills, especially for high-reliability, high-correctness domains like money
  • Comfort working autonomously in ambiguous, fast-moving environments with high business impact
  • Excellent debugging and problem-solving skills, including handling complex billing edge cases and failure modes
  • Experience building customer-facing billing or payments interfaces that simplify complex pricing models

Nice to have

  • Experience with usage-based billing platforms like Orb, Metronome, or Stripe Billing
  • Experience building coupons, referral programs, credits, or other monetization growth systems
  • Experience working on marketplaces, fintech integrations, or multi-party payment flows
  • Prior work on globally distributed payment systems with localization and compliance considerations

What the JD emphasized

  • high-reliability, high-correctness domains like money
  • complex billing edge cases and failure modes
  • customer-facing billing or payments interfaces that simplify complex pricing models