# Senior Product Engineer, Product Platform
**Company:** [Replit](https://hotfix.jobs/companies/replit)
**Location:** Foster City, CA
**Salary:** $225K-$320K
**Experience:** 5+ years
**Skills:** TypeScript, React, Node.js, Postgres, Redis, Temporal, GCP, Datadog, Sentry, Cloudflare
**Posted:** 2026-02-26
> Builds and scales shared product platform systems and primitives powering Replit Agent and core experiences for millions of users. Requires 5+ years experience with web stacks, platform systems, and strong product judgment.
## Job Description
## What you’ll do
- **Lead major cross-team platform initiatives**, taking foundational systems from **0 → 1** and scaling them to support millions of users
- Build **shared, extensible Agent primitives** that Replit Agent can reuse safely and consistently (Meta Programming)
- Identify the highest-leverage technical bottlenecks (performance, reliability, correctness, abuse, observability), then **design and ship solutions for our scale**
- Raise the bar for engineering excellence through **architecture reviews, code quality, reliability standards, and mentorship**
- Partner across teams to improve platform adoption, ergonomics, and velocity — turning platform work into measurable outcomes

## Core areas you’ll work on
**Agents and Replit users depend on us to build applications** (e.g. Connectors framework, Content/configuration primitives (CMS + product surfaces), Data/analytics/events + experimentation primitives).

**Replit Agent as a principal in third party systems**. Agent can be fully used within ChatGPT and publishes straight to the iOS app store.

**Platform product teams rely on us to ship consistently** (e.g. Identity & Access platform (SSO/SCIM), Localization/i18n platform, Notifications & communications platform).

**Core web platform infrastructure** (e.g. performance & page load optimization, observability and debugging workflows, caching strategy and reliability).

## Required skills and experience
- **5+ years** of professional software engineering experience
- Understanding of the full agentic software development stack, helping coding agents build, test and review correct code.
- Strong track record leading complex projects with cross-functional stakeholders
- Experience building and operating **platform systems** that other teams depend on
- Experience operating and scaling systems in production (reliability, performance, incidents, on-call readiness)
- Strong product judgment: you can balance UX, speed, correctness, and long-term maintainability
- Comfort working in modern web stacks such as **TypeScript, React, Node.js, Postgres**

## Bonus points
- Experience working in environments with a **high engineering bar** (or a fast-growing startup where you shipped fast *without* burning out quality)
- Experience with platform and distributed systems patterns (queues, workflows, caching, rate limiting, async processing)
- Familiarity with systems like:
  - **Redis**, Postgres
  - Workflow engines (e.g. **Temporal**)
  - Auth and enterprise identity (SSO, SCIM)
  - Abuse protection and edge systems (Cloudflare)
  - Cloud platforms (**GCP**)
  - Observability (**Datadog**, **Sentry**)
  - Localization
  - Experimentation and event pipelines (Statsig, Segment, analytics/event tracking)
- Excited about the future of programming, including agent workflows and developer tools
- Exposure to agent ecosystems (e.g. MCP-style patterns, tool integrations, structured automation)

## Example Projects You’ll Work On
- **Connectors platform for agents** — ship a secure connector framework (OAuth/permissions/data access) so agents can integrate with Slack/Notion/GitHub/etc.
- **Agent-facing external surfaces** — own high-quality embedded experiences (desktop/extension/embeds) that let agents act in-context across tools
- **Safety + abuse controls for agent actions** — design permissioning, rate limits, and policy enforcement so agents can operate safely at scale
- **Real-time notifications platform** — design in-app/email surfaces + build reliable delivery/fanout, preferences, and observability
- **Core web platform performance + caching** — improve latency and reliability via caching strategy (Redis), profiling, and safe fallbacks
- **Events + experimentation primitives** — standardize tracking/metrics + feature flags/rollouts so teams can ship safely and measure impact
**Apply:** https://hotfix.jobs/jobs/senior-product-engineer-product-platform-at-replit-78f5b575-77eb-4aea-9f90-5a66d401897d
**Canonical:** https://hotfix.jobs/jobs/senior-product-engineer-product-platform-at-replit-78f5b575-77eb-4aea-9f90-5a66d401897d