Principal Software Engineer North Bethesda, MD

Xometry; North Bethesda (MD); Hybrid; USD 200,000 - 225,000; Full time

Benefits offered by this job

401(k) match

Medical, dental and vision insurance

Generous paid time off

Job summary

Xometry is seeking a Principal Software Engineer to architect and drive a native, embedded integration with a major enterprise partner. You will lead design for real-time AI insights within the partner’s design environment and mentor engineers across teams.

The role demands 8–12+ years of software experience, deep stack expertise in Python, React/TS, AWS, and a strong background in microservices and scalable architectures. Hybrid work in MD/MA locations is offered.

Qualifications

• 8–12+ years of professional software development experience.
• Deep experience with Python backend services, React/TypeScript embedded UIs, and AWS cloud infrastructure.
• Significant experience in system architecture, microservices, and distributed data exchange.
• Proven track record building enterprise-grade integrations beyond simple API wrappers.

Responsibilities

• Lead discovery, architectural design, and adoption of embedded partner integration.
• Ensure real-time AI insights with sub-second latency in partner UI.
• Drive multi-quarter roadmaps and cross-team decision-making.

Skills

8–12+ years experience

Python

React/TypeScript

AWS

Architectural design

Education

Bachelor’s in Computer Science, Engineering, or related field

Tools

Python

React

TypeScript

AWS

Job description

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.

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. 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.

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: 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.

Scope and Impact: 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.

Collaboration and Communication: 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.

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.

What You'll Bring to Xometry:

Experience: 8–12+ 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: Bachelor’s in Computer Science, Engineering, or a related field, or equivalent practical experience

You Would Be A Great Fit With:

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 $200,000 - $225,000 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.

#LI-Hybrid

#Promoted

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.

Voluntary Self-Identification

For government reporting purposes, we ask candidates to respond to the below self-identification survey.Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiringprocess or thereafter. Any information that you do provide will be recorded and maintained in aconfidential file.

As set forth in Xometry’s Equal Employment Opportunity policy,we do not discriminate on the basis of any protected group status under any applicable law.

If you believe you belong to any of the categories of protected veterans listed below, please indicate by making the appropriate selection.As a government contractor subject to the Vietnam Era Veterans Readjustment Assistance Act (VEVRAA), we request this information in order to measurethe effectiveness of the outreach and positive recruitment efforts we undertake pursuant to VEVRAA. Classification of protected categoriesis as follows:

A "disabled veteran" is one of the following: a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or a person who was discharged or released from active duty because of a service-connected disability.

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An "active duty wartime or campaign badge veteran" means a veteran who served on active duty in the U.S. military, ground, naval or air service during a war, or in a campaign or expedition for which a campaign badge has been authorized under the laws administered by the Department of Defense.

An "Armed forces service medal veteran" means a veteran who, while serving on active duty in the U.S. military, ground, naval or air service, participated in a United States military operation for which an Armed Forces service medal was awarded pursuant to Executive Order 12985.