Principal Software Engineer

About this role

<div class="content-intro"><p><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;">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. Xometry’s 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.</span></p></div><p data-path-to-node="5"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;">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.</span></p> <p data-path-to-node="6"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;">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 Xometry’s core AI engines (DFM and IQE) and natively embedding them into our partner's 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.</span></p> <p data-path-to-node="7"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;">This role requires a hybrid schedule (3 days a week) at our North Bethesda, MD or Waltham, MA office location.</span></p> <h2 data-path-to-node="9"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;">How You'll Contribute:</span></h2> <ul data-path-to-node="10"> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="10,0,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="10,0,0" data-index-in-node="0">Software Development and Technical Craft:</strong> 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.</span></p> </li> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="10,1,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="10,1,0" data-index-in-node="0">AI Fluency:</strong> 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.</span></p> </li> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="10,2,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="10,2,0" data-index-in-node="0">Problem Solving and Decision Making:</strong> 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.</span></p> </li> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="10,3,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="10,3,0" data-index-in-node="0">Scope and Impact:</strong> 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.</span></p> </li> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="10,4,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="10,4,0" data-index-in-node="0">Collaboration and Communication:</strong> 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.</span></p> </li> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="10,5,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="10,5,0" data-index-in-node="0">Operational Excellence:</strong> 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.</span></p> </li> </ul> <h2 data-path-to-node="12"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;">What You'll Bring to Xometry:</span></h2> <ul data-path-to-node="13"> <li style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"> <p data-path-to-node="13,0,0"><span style="font-size: 10pt; font-family: arial, helvetica, sans-serif;"><strong data-path-to-node="13,0,0" data-index-in-node="0">Experience:</strong> 8–12+ years of professional software development experience, with a proven track record of leading complex, multi-quarter i