Principal Software Engineer, Money Infrastructure

About the role

This is a Principal Product Engineering role focused on Money Infrastructure at Replit. You’ll work on the financial backbone that powers how Replit earns money, how builders earn money, and how Agents transact. This role sits at the intersection of engineering, product, and the business. The systems you build directly impact revenue, trust, and some of the most critical user journeys on the platform.

Responsibilities

• Lead the design, architecture, and implementation of Replit’s core money infrastructure, spanning pricing, billing, payments, and monetization.
• Own and scale the global order-to-cash foundation supporting credit-based subscriptions, usage-based billing, marketplaces, in-app payments, and commerce for Agents.
• Enable rapid pricing and packaging experimentation across the company by building flexible abstractions and APIs for new SKUs, plans, and monetization models.
• Build high-converting, localized payment experiences across geographies — thinking globally while enabling users to pay locally.
• Power builder monetization by creating payment rails for apps, Agents, subscriptions, and new monetization primitives.
• Partner closely on data specifications with finance, accounting, and data teams to produce accurate, auditable, and reliable financial data.
• Collaborate with external monetization and payments partners (e.g. billing platforms, payment processors) to accelerate execution.
• Create monitoring, observability, and feedback systems to proactively detect issues, resolve failures, and optimize performance across financial flows.

Requirements

• 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.

Tools + Tech Stack

• Rust
• TypeScript
• React
• Postgres
• GraphQL
• Node.js

Bonus Points

• 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.

Full-Time Employee Benefits

• Competitive Salary & Equity
• 401(k) Program with a 4% match (US Only)
• Health, Dental, Vision and Life Insurance
• Short Term and Long Term Disability
• Paid Parental, Medical, Caregiver Leave
• Flexible Time Off (FTO) + Holidays
• Monthly Wellness Stipend
• Autonomous Work Environment
• In Office Set-Up Reimbursement (In-Office Only)
• Quarterly Team Gatherings
• 💡 In Office Amenities (In-Office Only)