Principal Software Engineer

Responsibilities

• You are responsible for leading cross-team decision-making and executing multi-quarter roadmaps. Your work directly impacts Xometry’s strategic edge, moving us from lightweight HTML snippets to a deep, native integration that eliminates the need for design file exports.
• You will act as the primary technical point of contact for our partner's engineering teams. You'll motivate internal Xometry teams to embrace the vision of a "unified digital thread" and mentor senior and mid-level engineers through complex design reviews.

Requirements

• 8–12+ years of professional software development experience, with a proven track record of leading complex, multi-quarter initiatives
• Deep experience in our stack: Python (backend services, APIs), React/TypeScript (embedded UIs), and AWS cloud infrastructure
• Significant experience with system architecture, microservices design, and distributed systems, specifically those involving high-volume data exchange between disparate enterprise ecosystems
• A track record of introducing architectural patterns adopted across multiple teams and building "enterprise-grade" integrations that go beyond simple API wrappers
• Bachelor’s in Computer Science, Engineering, or a related field, or equivalent practical experience
• Broad experience working within enterprise engineering software ecosystems (e.g., Dassault/SolidWorks, Autodesk, or similar major platforms).
• 3D Geometry Background:
• Understanding of B-Rep, mesh formats, and the complexities of 3D modeling workflows

Software Development and Technical Craft

You will lead the discovery, architectural design, and adoption of our flagship embedded partner integration. You'll introduce best practices for handling native 3D geometry data flows and ensure our systems are extensible, scalable, and capable of delivering real-time AI insights at the moment of design.

AI Fluency

You will leverage AI tools to accelerate the development of geometry-processing pipelines and collaborate with our Data Science team to ensure the "IQE" (Instant Quoting) engine performs with sub-second latency within the partner application UI. In addition, you’ll define and evangelize the organization's AI fluency standards, coaching Staff and Senior engineers on integrating AI tooling into architecture, design, and development workflows to drive measurable productivity and quality outcomes.

Problem Solving and Decision Making

You will tackle complex issues involving deep technical coupling between Xometry’s marketplace and our partner's enterprise software environment. You'll exercise judgment in selecting the right methods for ring-fenced data governance and "one-click" order placement within enterprise-grade security constraints.

Operational Excellence

You will own the reliability and security of the integration microservices, ensuring that "click-to-buy" functionality is bulletproof and that monitoring/alerting covers the unique lifecycle of enterprise PLM transactions.

Marketplace Engineering

Experience in e-commerce, fintech, or B2B marketplaces where "click-to-buy" precision is critical

Security Mindset

Experience building dedicated-tenant or ring-fenced solutions for high-security enterprise clients

We also offer a competitive benefits package, including 401(k) match, medical, dental and vision insurance; life and disability insurance; generous paid time off including vacation, sick leave, floating and fixed holidays, maternity and bonding leave; EAP, other wellbeing resources; and much more.

#LI-Hybrid

Xometry is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran, or disability status.

For US based roles: Xometry participates in E-Verify and after a job offer is accepted, will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the U.S.