Backend Engineer (Learn)

About Sana 

Sana is an AI lab building superintelligence for work.

We believe organizations can accomplish their missions faster when humans can effortlessly access knowledge, automate repetitive work, and learn anything with the help of agentic AI.

As part of Workday, we are committed to building AI that augments humans.

If that’s a mission that excites you, you’re in the right place.

About the role

You'll build and evolve the core services that power agents and product features, with a focus on enterprise-scale workloads, performance optimization, and long-term architectural sustainability. You drive architecture and systems design to ensure our platform can support high volumes of data, entities, and demanding enterprise clients.

In this role, you will

• Design and decompose services and APIs for scale and clarity

• Build eventing and queue systems for reliable, high-throughput data flows

• Lead schema evolution, migrations, query/index optimization and caching strategies

• Define and enforce consistency models and multi-region readiness

• Optimize for performance budgets and privacy/tenant isolation

• Work hands-on with TypeScript/Node, Postgres, and distributed systems primitives

What success looks like

• Core services are reliable, scalable, and easy to evolve

• Risks are identified and solved before issues become critical

• APIs are clear, well-documented, and power seamless product experiences

• Data boundaries are robust—privacy and tenant isolation are never compromised

• Performance budgets are met, even under heavy load

• You are a trusted partner for distributed systems design and implementation

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 complemented with a transparent and highly competitive options program.

• 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)