AI Builder Fellowship

Cobalt Streamworks (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. Cobalt Streamworks’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. Location: Hybrid (3 days/week onsite in Waltham, MA or North Bethesda, MD) Duration: 1 Year, Full-Time (with potential conversion to permanent FTE) Compensation: Competitive salary + full benefits from the beginning Application Window: July 9 - July 26 The Premise Custom manufacturing is a $275B industry that still runs on phone calls, spreadsheets, and faxed drawings. Cobalt Streamworks is the marketplace turning quotes, supplier matching, and production into an AI-first software product. The Machine Shop is our founding cohort of 5–8 elite builders. You won't be parked in a "learning track"—you will be deeply embedded in product and engineering pods shipping agentic workflows, ML quoting models, and vision-based quality tools to real aerospace, defense, and medical clients who measure success in microns. Who We Are Looking For (Craft over Credentials) The Public Shipper: Your side projects have more users than your last company's formal product documents. The Non-Traditionalist: You taught yourself with AI tools and have a body of real work that speaks for itself. No CS degree required. The Early-Career Accelerator: You have 1–3+ years of experience but are hitting bureaucratic bottlenecks. You want to ship to production every single week. What We Expect You’ve built and deployed something real with AI that you can demo end-to-end. Comfortable using AI-assisted coding tools to iterate at high velocity. Working knowledge of Python and/or modern scripting environments. U.S. work authorization without current or future sponsorship. How to Apply (5 Steps, Zero Resumes) 1.Submit Your Build: July 9 - July 26 Click the link below to view the application. Drop a 5-minute Loom video explaining something you made, a link to the GitHub repo, and a few sentences on what you learned. Skip the resume. 2.Review & Selection: July 27 - August 5 Every submission is reviewed directly by Cobalt Streamworks builders and AI leadership looking for taste and output. ~25 finalists advance. 3.Onsite Build Day: August 13 Come to Waltham, MA or North Bethesda, MD for a single day. Walk us through your project (Round 1) and build live on Cobalt Streamworks's AI stack under a clock (Round 2). 4.Offer the Next Day: August 14 If you're in, you will receive an offer within 24 hours of Build Day. 5.Cohort Starts: September 8 Sign, onboard, and begin shipping production code within three weeks of your offer. 🔗 Ready to skip the resume and apply? To read the full breakdown of what you'll be shipping (including Enterprise BOM auto-quoting and Vision AI), read our FAQs, and submit your Loom/Repo: 👉 VIEW DETAILS & APPLY TO THE MACHINE SHOP: https://pages.xometry.com/aibuilderfellowship The estimated base salary range for new hires into this role is $96000-114000 annually depending on factors such as job-related skills, relevant experience, and location. 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 Cobalt Streamworks 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: Cobalt Streamworks 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.