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cognee

Principal Engineer

cognee
Germany · Full-time · Mid-Senior
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

Key Skills

Ranked by relevance

python cicd san ai
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Country Guide

Germany

Strong tech sector & EU Blue Card visa

Posted
Jan 01, 2026
Type
Full-time
Level
Mid-Senior
Location
Berlin
Company
cognee

Industries

IT Services IT Consulting

Categories

Other

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