Principal Software Engineer

Xometry (NASDAQ: XMTR) powers the industries of today and tomorrow by connecting the people with big ideas to the manufacturers who can bring them to life. Xometrys digital marketplace gives manufacturers the critical resources they need to grow their business while also making it easy for buyers at Fortune 1000 companies to tap into global manufacturing capacity.

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

You will be the primary technical architect for our landmark partnership with a major enterprise partner. This is not a standard plug-in project; you will be responsible for extracting Xometrys core AI engines (DFM and IQE) and natively embedding them into our partners core digital ecosystems. Your work will enable a science fiction speed workflow where designers receive real-time manufacturability and pricing feedback on native 3D geometry without ever leaving their primary design environment.

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

• Software Development and Technical Craft: You will lead the discovery architectural design and adoption of our flagship embedded partner integration. Youll 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 addition youll define and evangelize the organizations 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 Xometrys marketplace and our partners enterprise software environment. Youll exercise judgment in selecting the right methods for ring-fenced data governance and one-click order placement within enterprise-grade security constraints.

• Scope and Impact: You are responsible for leading cross-team decision-making and executing multi-quarter roadmaps. Your work directly impacts Xometrys strategic edge moving us from lightweight HTML snippets to a deep native integration that eliminates the need for design file exports.

• Collaboration and Communication: You will act as the primary technical point of contact for our partners engineering teams. Youll motivate internal Xometry teams to embrace the vision of a unified digital thread and mentor senior and mid-level engineers through complex design reviews.

• 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.

• Experience: 812 years of professional software development experience with a proven track record of leading complex multi-quarter initiatives

• Expert Technical Proficiency: Deep experience in our stack: Python (backend services APIs) React/TypeScript (embedded UIs) and AWS cloud infrastructure

• Architectural Mastery: Significant experience with system architecture microservices design and distributed systems specifically those involving high-volume data exchange between disparate enterprise ecosystems

• Integration Expert: A track record of introducing architectural patterns adopted across multiple teams and building enterprise-grade integrations that go beyond simple API wrappers

• Education: Bachelors in Computer Science Engineering or a related field or equivalent practical experience

• CAD/PLM Domain Expertise: 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

• 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

The estimated base salary range for new hires into this role is $200000 - $225000 annually bonus depending on factors such as job-related skills relevant experience and location. The total compensation package includes base bonus and equity.

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.

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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.