# Principal Backend Engineer at Flagship Pioneering

- Company: Flagship Pioneering
- What the company does: Pioneering Partnerships Latest News.
- Company website: https://www.flagshippioneering.com
- Type: VC firms
- Level: Principal and up
- Location: Cambridge, MA USA
- Work setup: On-site
- Pay: $188K to $259K base salary per year (USD)
- Posted: 2026-08-25
- Apply by: 2026-10-12
- Apply: https://boards.greenhouse.io/flagshippioneeringinc/jobs/8729567002?gh_jid=8729567002
- Page: https://www.1752.vc/careers/jobs/flagship-pioneering-principal-backend-engineer/

## About the role

As a Principal Backend Engineer , you’ll be a technical leader responsible for architecting, building, and scaling the core backend systems that power our agentic platform. You’ll drive the design of high-throughput services, resilient data pipelines, real time agent clouds, and integrations with mission-critical third-party providers. You’ll translate complex requirements into robust, elegant systems that support rapid growth.

## What they're looking for

- 8+ years of backend engineering experience
- Experience with high velocity agentic coding under strict security requirements
- Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience
- Strong expertise in backend languages and frameworks (Node.js/TypeScript, Go, Python, or similar)
- Experience designing scalable distributed systems, microservices, and event-driven architectures
- Deep experience with third-party integrations, REST/GraphQL APIs, webhooks, and rate-limited services

Tags: Artificial Intelligence