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Replit

Mid

Build the shared platform primitives — backend infra, connectors, identity, frontend — that every other Replit team depends on

Replit's Product Platform team owns the horizontal foundations the rest of the company builds on. This Product Engineer role can lean frontend, backend, or full-stack, and covers backend infrastructure, third-party connectors (OAuth, multi-tenant), product primitives like identity/entitlements, and the frontend platform layer.

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What this interview tests

  • Production reliability, performance, and incident response
  • Platform/shared-systems design that other teams depend on
  • OAuth, permissions, multi-tenant connector architecture
  • Tradeoff reasoning across UX, correctness, speed, maintainability
  • TypeScript/React/Node.js/Postgres depth
  • Cross-functional collaboration with product and design

Common question themes

Describing a production incident you diagnosed and resolved, including instrumentation added afterward

Designing a connector/integration system with OAuth and multi-tenant safety in mind

Walking through a latency, cost, or SLO improvement you drove via caching or data-access changes

Making and defending a technical tradeoff across UX vs. correctness vs. delivery speed

Architecting a reusable primitive (e.g., entitlements, identity) that other teams adopt without understanding internals

Cutting time-to-interactive or improving client performance on a core surface

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