Backend Engineer (Learn)

Sana; Stockholms kommun; On-site; SEK 700 000 - 900 000; Full time

Job summary

A leading tech firm in Stockholm is seeking a developer to build and enhance core services for an AI-powered learning platform. The role requires expertise in TypeScript and Node.js, focusing on scalability and performance optimization. Join a team of talented professionals and contribute to shaping the future of AI in a collaborative environment with competitive compensation.

Benefits

Competitive salary

Transparent options program

Swift professional growth

Regular team gatherings

Qualifications

• Experience in designing and evolving services and APIs at scale.
• Proficient in TypeScript and Node.js for backend development.
• Strong understanding of performance budgets and system optimizations.

Responsibilities

• Design and decompose services and APIs for scale and clarity.
• Build eventing and queue systems for data reliability.
• Optimize for performance and privacy compliance.

Skills

TypeScript

Node.js

Distributed systems design

Performance optimization

API design

Tools

Postgres

Kotlin

GCP

Terraform

Redis

Job description

Overview

About Sana At Sana, we’re building Learn—an AI-powered learning platform that combines the simplicity of a modern LMS with intelligent features like AI tutor, automated content generation, and interactive apps. Our goal is to help enterprises make knowledge not just accessible, but actionable at scale. We’re a product-obsessed team of engineers and designers from companies like Google, Spotify, and Databricks, united by a focus on technical excellence and rapid iteration. With Learn already supporting hundreds of leading enterprises, we’re just getting started—and there’s much more to build.

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)