Weave combines LLMs and domain-specific machine learning to understand engineering work. We understand how much work was done, how good it is, and how AI contributed. Backed by Y Combinator.
About the role
12+ years of software engineering experience with progressive technical leadership scope Track record of leading cross-team technical initiatives that delivered measurable business outcomes
What they're looking for
- 12+ years of software engineering experience with progressive technical leadership scope
- Track record of leading cross-team technical initiatives that delivered measurable business outcomes
- Demonstrated ability to influence without authority, build consensus across organizational boundaries, and translate technical tradeoffs into business terms
- Deep expertise in distributed systems architecture, including building and operating services that handle hundreds of millions of transactions and terabytes of data
- Proven experience with event streaming and messaging infrastructure (Kafka, Google Pub/Sub, or similar) at significant scale
- Strong background in scalable data stores—both relational (PostgreSQL at scale, Vitess, Spanner) and NoSQL (Bigtable, Redis, etc.)
More about this role
Weave is seeking a Principal Engineer to serve as the technical cornerstone of our Messaging Fellowship—the domain responsible for how 30,000+ healthcare practices communicate with their patients across SMS, MMS, email, fax, and emerging channels. This is not a role for someone seeking a larger individual contributor scope; it's a role for someone who shapes technical strategy at the company level, influences architectural decisions across multiple teams, and solves the hardest problems that span organizational boundaries.
As a Principal Engineer, you will own the multi-year technical vision for messaging infrastructure that processes hundreds of millions of messages and manages terabytes of data. You'll partner with Engineering Directors, Staff Engineers, and Product leadership to ensure our technical decisions position Weave for long-term competitive advantage. Your success will be measured not by your personal output, but by how the organization's technical capability grows through your influence, mentorship, and strategic leadership.
This role requires someone with impeccable technical judgment, the ability to operate in ambiguity, and the character to lead through influence...
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