Replit
Senior
Own the frontend architecture every product team at Replit builds on
Replit's Product Platform team owns the shared foundations — backend infra, connectors, product primitives, and the frontend platform. This role goes deep on frontend: application frameworks, the API/data layer, testing infra, and client performance, on a small team where the work is horizontal and high-leverage across all of engineering.
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What this interview tests
- Frontend platform architecture: frameworks, state, routing, SSR/CSR
- API and data layer design (REST/GraphQL, error handling, caching)
- Client performance instrumentation and monitoring
- Safe rollout of cross-cutting changes: codemods, migrations, staged rollouts
- Architecture tradeoffs across UX, correctness, delivery speed, maintainability
- Designing platform primitives for adoption by other product teams
Common question themes
Tell me about a platform API or shared primitive you designed that other teams adopted.
Walk me through a client performance issue you profiled — what did you instrument and what fixed it?
Describe a large-scale frontend migration you rolled out safely across a codebase.
How do you decide between SSR and CSR for a given product surface, and what are the tradeoffs?
Tell me about an architecture decision where you had to balance delivery speed against long-term maintainability.
How do you think about making a codebase legible to both human engineers and AI coding agents?
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