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Senior Software Engineer (Thomas)

Xometry· Software Engineering
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Waltham, MA$176.3k - $182.5kfull-timePosted 1w ago

About the role

Senior Software Engineer to join Thomas engineering, evolving from a traditional supplier directory to AI-assisted sourcing with LLMs, retrieval, and search; build and maintain product experiences and AI-powered features central to strategy; collaborate with product manager and engineers.

Responsibilities

  • Hands-on technical leadership. Lead by example by actively coding, reviewing, and troubleshooting. Set good coding patterns and designs for the team.
  • Lead projects end-to-end. Own the design and delivery of features within your team, from problem to production and largely independently, including the AI-powered capabilities at the center of our strategy: features that use LLMs, retrieval, and search, with the evaluations and guardrails that keep them accurate and safe.
  • Mentorship and code review. Guide and mentor engineers on the team; do thorough code review and raise the bar for how others review.
  • Operational excellence. Own testing and reliability for what you ship. Deliver software that meets customer expectations and business timelines.

Qualifications

  • 6+ years of software development experience, focused on outcomes over output, with a habit of helping shape the team's direction rather than only building to spec.
  • Strong full-stack skills that transfer to our stack: backend services in TypeScript and Node.js with GraphQL APIs, a React and Next.js frontend, PostgreSQL, and search such as OpenSearch. Comparable experience in another modern stack counts just as much; prior experience with our exact tools is not required.
  • Hands-on experience building AI-powered product features: LLM applications, retrieval-augmented generation, vector search, or search relevance. We hire AI-native engineers who build with these tools and judge their output rigorously, whatever the specific frameworks.
  • Bonus points: experience with multimodal (image and text) embeddings and search, agent orchestration frameworks (e.g. LangGraph, LangChain), and fine-tuning or adapting models for a domain.
  • A fast learner with high agency who works fluently in an AI-native development environment and shares what they learn.
  • Strong execution, debugging, and communication skills. Prioritizes unit and integration testing.
  • E-commerce or marketplace product experience is a plus.

Skills

Required:TypeScriptNode.jsGraphQLReactNext.jsPostgreSQLOpenSearchAI/ML

Benefits

  • competitive benefits package, including base, bonus, and equity
Last updated Oct 21, 2026. Interested? Apply on the company site.

About Xometry

Where Big Ideas Are Built | Production Parts and Prototypes | Xometry

Xometry is a leader in high-precision production part and prototyping manufacturing on demand. Get instant quotes on CNC machining, 3D printing, sheet metal fabrication, laser cutting, and more.

CNC Machining3D PrintingSheet Metal FabricationLaser CuttingPrototypingInjection MoldingMetal Part ProductionHigh-Volume Metal Production
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