# Principal Engineer

> Topoteretes UG (haftungsbeschränkt) · Berlin, Germany (Hybrid) · Full-time · Posted 2026-01-01

**Salary:** EUR 120,000–150,000

**Workplace:** hybrid

## Description

Cognee is building the **memory engine + data plane for AI agents** to plan, reason, and act. Our open-source **Python SDK is in production at 70+ companies**, hit **GitHub Trending**, and runs **550 000 times a month** . We’ve won early customers (top 10 Pharma etc) and just raised a large **Seed**.

  
We’re hiring a **Principal Engineer** to **own the Cognee SDK as a product surface area** — setting technical direction, raising engineering quality, and scaling adoption.

You'll be coding in Python and Rust.

  
**What you’ll own**  

-   SDK architecture, API design, and roadmap (Python now, future SDKs later)
-   Release engineering: versioning, compatibility, CI/CD, testing, benchmarks
-   Performance, reliability, observability, and production readiness
-   Developer experience: docs, examples, reference implementations
-   Open-source stewardship: contribution workflows, PR reviews, community support
-   Cross-team leadership: shaping core platform contracts through the SDK

## Requirements

**What we’re looking for**  

-   Principal-level ownership of a **high-adoption SDK / developer platform / core library**
-   Deep Python skills (packaging, typing, testing, performance, clean APIs)
-   Experience with production systems
-   Strong taste for DX and high standards for stability and maintainability
-   Bonus: open-source leadership, agent/memory/retrieval systems experience
-   Hands-on experience with LLMs

**The SDK is how the world experiences Cognee — you’ll define it.**

## Benefits

Up to 150 000 EUR + Equity

Company sponsored meals

Trips to San Francisco

Fetch breaks with the office dog

## Apply

[Apply at Topoteretes UG (haftungsbeschränkt)](https://apply.workable.com/topoteretes-ug-haftungsbeschrankt/j/9827E5DA17/apply)

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