Flagship Pioneering
Principal Software Engineer - Agentic Platform
$188K–$258K
Cambridge, MA USA +1 · Principal · Full-time · Posted Jun 11, 2026
- Location
- Cambridge, MA USA
Pioneering Intelligence - Experience
- 10+ years of professional software development experience.
- Education
- B.S. or M.S. in Computer Science, Engineering, or a related field.
About the job
Owns and builds a durable agentic platform for reliable, long-running scientific AI workflows, taking it from research prototypes into production.
What you'll do
- Architect and operate workflow orchestration, evaluation frameworks, and event-driven distributed systems.
- Define SDK abstractions and API contracts, and deliver reusable infrastructure-as-code implementations.
- Set platform technical standards and direction; partner across teams and mentor engineers and scientists.
What they ask for
- B.S. or M.S. in Computer Science, Engineering, or a related field.
- Track record architecting and maintaining large-scale distributed systems in production at technology companies.
- Expertise in workflow orchestration and event-driven architecture, including stateful execution, idempotency, durable retries, and replay.
- Strong AWS cloud-native engineering with infrastructure-as-code, containerization, and autoscaling.
Nice to have
- Hands-on experience with agentic AI and orchestration frameworks such as Pydantic AI, LangGraph, LangChain, CrewAI, or AutoGen.
- Experience integrating LLMs and model platforms, building agent evaluation frameworks, or working in scientific domains.
Pay
$188,000 - $257,500 USD base salary
Tools
AWS, AWS CDK, Terraform, Pydantic AI, LangGraph, LangChain, CrewAI, AutoGen
AI focus
Builds production infrastructure for agentic AI and autonomous scientific reasoning, including multi-agent workflows and evaluation frameworks.
Model-written summary · the original posting is authoritative