Principal Engineer-Messaging

Principal EngineerWeave 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 rather than authority. You'll be a visible leader whose approach to problem-solving becomes the template for how engineering operates at Weave.The Messaging Fellowship encompasses multiple engineering teams responsible for Weave's core communication capabilities—appointment reminders, review requests, missed-call texts, two-way messaging, and the infrastructure that delivers billions of messages reliably at scale. You will work across these teams as a technical leader, partnering with Engineering Managers, Staff Engineers, and cross-functional stakeholders to drive architectural coherence and strategic technical initiatives.• This position is hybrid (Lehi, UT) or Remote (US-based).• Reports to: Director of EngineeringWhat You Will OwnTechnical Strategy & ArchitectureOwn the multi-year technical vision for messaging infrastructure, ensuring architectural decisions position Weave for scale, reliability, and competitive advantageDrive architectural coherence across multiple teams, identifying and resolving cross-system dependencies and technical debt at the platform levelLead technical due diligence for major initiatives, including build-vs-buy decisions, vendor evaluations, and platform migrationsCross-Team Problem SolvingIdentify and solve company-level technical problems that span organizational boundaries—the problems that are too complex, too cross-cutting, or too ambiguous for any single team to ownCompile information across systems, teams, and projects to develop comprehensive solutions with extensive validation, rollback, and testing plansForecast project costs in time, money, and opportunity cost; account for impacts across the businessStrategic Technical LeadershipMonitor the industry landscape, anticipate where messaging and data infrastructure are heading, and ensure Weave stays ahead of the curveCut through noise and hype to identify genuine strategic value; advocate for and lead key initiatives that prepare Weave for emerging challengesShape company-wide standards for engineering excellence, observability, and reliability in distributed systemsMentorship & Organizational CapabilityActively mentor Staff and Senior Engineers across the fellowship, developing the next generation of technical leadersElevate architectural thinking across teams through design reviews, documentation standards, and hands-on guidanceBuild organizational capability that persists beyond your individual contributionsWhat You Will Need to Accomplish the Job12+ years of software engineering experience with progressive technical leadership scopeTrack record of leading cross-team technical initiatives that delivered measurable business outcomesDemonstrated ability to influence without authority, build consensus across organizational boundaries, and translate technical tradeoffs into business termsDeep expertise in distributed systems architecture, including building and operating services that handle hundreds of millions of transactions and terabytes of dataProven experience with event streaming and messaging infrastructure (Kafka, Google Pub/Sub, or similar) at significant scaleStrong background in scalable data stores—both relational (PostgreSQL at scale, Vitess, Spanner) and NoSQL (Bigtable, Redis, etc.)Operational experience with cloud-native infrastructure on GCP or AWS, including Kubernetes, infrastructure-as-code, and highly available system designSolid backend engineering foundation (Go preferred; Python, Java, or C# acceptable)What Will Make Us Love YouExperience with messaging delivery systems, carrier/aggregator integrations, or telecommunications infrastructureExpertise in data platform architecture: streaming pipelines, data lakes, warehouses, or distributed analyticsBackground in compliance-heavy environments (healthcare, fintech) with experience navigating regulatory requirements in technical designExperience shaping AI/ML infrastructure or integrating AI capabilities into production systemsHistory of external technical leadership: open source contributions, conference speaking, or published technical writingStrong opinions, loosely held—you bring conviction to technical discussions while remaining genuinely open to better ideas#LI-REMOTE, #LI-HYBRIDEmployment with Weave is contingent upon the successful completion of a background check, conducted in accordance with applicable laws.At Weave, we use Artificial Intelligence (AI) tools to help us work more efficiently and create a smoother candidate experience. AI may assist with things like writing job descriptions, scheduling interviews, or reviewing applications against job-related criteria. For additional information, please review the External AI Policy Statement available on our Careers page.Weave is an equal opportunity employer that is committed to fostering an inclusive workplace where all individuals are valued and supported. We welcome anyone who is hungry to learn, problem-solve and progress regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity, veteran status, or other applicable legally protected characteristics. If you have a disability or special need that requires accommodation, please let us know.Beware of recruitment fraud. All official correspondence will occur through Weave branded email. We will never ask you to share bank account information, cash a check from us, or purchase software or equipment as part of your interview or hiring process.