Principal Software Engineer

About the Role

Xometry is looking for a Principal Software Engineer to join our Partner Ecosystems team. This team builds the high-performance integration layer that embeds Xometry’s AI-native marketplace directly into the world’s leading CAD and PLM platforms.

You will be the primary technical architect for our landmark partnership with a major enterprise partner. You will be responsible for extracting Xometry’s core AI engines (DFM and IQE) and natively embedding them into our partner's core digital ecosystems, enabling real-time manufacturability and pricing feedback on native 3D geometry directly within primary design environments.

*Note: This role requires a hybrid schedule (3 days a week) at our North Bethesda, MD or Waltham, MA office location.*

How You'll Contribute

• Software Development and Technical Craft: Lead discovery, architectural design, and adoption of our flagship embedded partner integration. Introduce best practices for handling native 3D geometry data flows and ensure scalable, extensible systems.
• AI Fluency: Leverage AI tools to accelerate geometry-processing pipelines and partner with the Data Science team to ensure sub-second latency for the Instant Quoting engine (IQE). Define and evangelize AI fluency standards, coaching Staff and Senior engineers.
• Problem Solving and Decision Making: Address deep technical coupling between Xometry’s marketplace and enterprise software environments. Exercise judgment on ring-fenced data governance and "one-click" order placement under enterprise security constraints.
• Scope and Impact: Lead cross-team decision-making and execute multi-quarter roadmaps to deliver deep native integrations eliminating design file exports.
• Collaboration and Communication: Act as the primary technical point of contact for partner engineering teams, drive the vision of a "unified digital thread," and mentor engineers through design reviews.
• Operational Excellence: Own integration microservice reliability and security, ensuring robust "click-to-buy" functionality and enterprise PLM monitoring/alerting.

Qualifications

Required

• 8–12+ years of professional software development experience with a track record of leading complex multi-quarter initiatives
• Deep experience in Python (backend services, APIs), React/TypeScript (embedded UIs), and AWS cloud infrastructure
• Significant experience with system architecture, microservices design, and distributed systems handling high-volume data exchange between disparate enterprise ecosystems
• Proven track record of introducing architectural patterns and building enterprise-grade integrations beyond simple API wrappers
• Bachelor’s in Computer Science, Engineering, or a related field, or equivalent practical experience

Preferred

• Broad experience working within enterprise engineering software ecosystems (e.g., Dassault/SolidWorks, Autodesk, or similar)
• Understanding of B-Rep, mesh formats, and 3D modeling workflow complexities
• Experience in e-commerce, fintech, or B2B marketplaces with precision "click-to-buy" workflows
• Experience building dedicated-tenant or ring-fenced solutions for high-security enterprise clients