Frontend Infra Engineer

About the role

You’ll own the core web stack at Sana - from our TypeScript/React frontend to the Node services, tooling, and monorepo infrastructure that power it. This is a role for engineers who love unblocking others: you’ll design and maintain the build systems, frameworks, and developer workflows that let teams ship fast, safely, and with confidence. You’ll work on everything from core web architecture and performance to CI, testing, and local development, ensuring our web platform is modern, secure, and a joy to build on.

In this role, you will

• Own and evolve Sana’s TypeScript/React/Node foundations, including frameworks, services, and conventions

• Maintain and improve our monorepo tooling: build tools, dependency management, scripts, and shared services

• Design and refine local development, testing, and build workflows so they’re fast, reliable, and easy to use

• Optimize web performance, reliability, and security across our frontend and Node services

• Shape and implement our testing strategy (unit, integration, end-to-end, visual) and related tooling

• Maintain and improve CI/CD pipelines, including caching, checks, and deployment workflows

• Define and champion best practices for web development, debugging, and observability across teams

• Collaborate closely with product engineers to identify friction points and remove them through better tooling and architecture

What success looks like

• Developers move quickly and confidently: local dev, testing, and builds feel fast, predictable, and low-friction

• Our monorepo, build system, and dependencies are well-structured, well-documented, and easy to maintain

• Core web flows are performant, secure, and observable—from frontend interactions to Node services

• CI/CD pipelines and test infrastructure are stable, discoverable, and trusted by engineers

• Framework and dependency upgrades are routine, low-risk, and keep us at the forefront of the TypeScript/React ecosystem

• You’re seen as a go-to engineer for web architecture, performance, and developer experience - raising the bar for how we build, ship, and maintain software at Sana.

Our tech stack

We build on a simple modern stack optimized for both humans and AI.

• Backend: TypeScript, Kotlin, Node.js

• Frontend: TypeScript, React, Tailwind

• Databases: Postgres, Redis

• Cloud infra: GCP/Kubernetes/Terraform

What we offer

• Help shape AI's future alongside brilliant minds from Notion, Dropbox, Slack, Databricks, Google, McKinsey, and BCG.

• Competitive salary and compensation package

• Swift professional growth in an evolving environment, supported by a culture of continuous feedback and mentorship from senior leaders.

• Work with talented teammates across 5+ countries, and collaborate with customers globally

• Regular team gatherings and events (recently in Italy and South Africa)