Principal Software Engineer: AI Platform & Impact Leader

Flagship Pioneering, Inc.; Cambridge (MA); On-site; USD 108,000 - 209,000; Full time

Benefits offered by this job

Healthcare coverage

Annual incentive program

Retirement benefits

Other benefits

Job summary

Flagship Pioneering’s FL105 seeks an experienced Principal/Senior Software Engineer to lead the design and development of customer‑facing features across the full stack. You will collaborate with product managers, designers, and ML researchers to translate customer needs into high‑impact solutions.

You’ll own features through the full lifecycle, implement CI/CD and security best practices, and leverage AWS to build scalable, AI‑powered services in a fast‑paced, entrepreneurial environment in

Qualifications

• Minimum 5+ years in software development with strong apps focus.
• Extensive AWS experience (ECS, S3, Lambda) or similar cloud.
• Proficient in Python with scalable, secure software delivery.
• Strong collaboration and communication across teams.
• entrepreneurial, proactive, and able to lead projects.

Responsibilities

• Lead design and development of customer-facing features across front-end and back-end stacks.
• Collaborate with product managers, designers, and ML researchers to translate needs into features.
• Own features through discovery, design, implementation, release, and iteration.
• Manage release planning, feature flags, monitoring, and cross-team coordination.
• Use analytics and experiments to evaluate feature performance and guide development.
• Design scalable architecture for AI-enabled back-end components.
• Contribute to UI/UX decisions with technical insight.
• Improve delivery with CI/CD, automated testing, and security practices.
• Leverage AWS to build reliable, scalable AI-powered services.
• Uphold data security, privacy, and compliance standards.

Skills

AWS

Python

Cloud architecture

Security best practices

Team collaboration

Communication

Tools

AWS CDK

TypeScript

CI/CD

Job description

Flagship Pioneering’s FL105 seeks an experienced Principal/Senior Software Engineer to lead the design and development of customer‑facing features across the full stack. You will collaborate with product managers, designers, and ML researchers to translate customer needs into high‑impact solutions.

You’ll own features through the full lifecycle, implement CI/CD and security best practices, and leverage AWS to build scalable, AI‑powered services in a fast‑paced, entrepreneurial environment in