Staff Software Engineer

Thomasnet, part of Xometry, is the industrial platform where millions of buyers find and source from North American manufacturers and suppliers. We are seeking a Staff Software Engineer to join Thomas engineering. As a senior individual contributor, you will guide software implementation across several engineering teams and influence decisions across our technology organization. Thomas is moving from a traditional supplier directory to AI-assisted sourcing, and you will set technical direction for the shared systems and AI infrastructure that this shift depends on, while staying hands-on in the code.

Responsibilities

Hands-on technical leadership: write and review architectural plans for new projects, then participate in implementation with the teams; Guide innovation: champion a mix of proven and cutting-edge technologies and methods, including how AI is adopted across the platform; Teaching and mentorship: serve as a mentor and guide to engineers across the organization; Code review: perform code reviews and mentor others across the org to perform good code reviews; Operational excellence: deliver reliable, high-quality software that exceeds customer expectations and aligns with business timelines; Collaborative strategy: build strong partnerships with product managers, designers, and leadership

Requirements

7+ years of professional software development experience, with a track record of owning outcomes, setting technical direction across teams, mentoring engineers at all levels, and influencing product and business decisions; Strong full-stack engineering skills (backend services in TypeScript and Node.js with GraphQL APIs, React and Next.js frontend, PostgreSQL and analytical data stores, and search such as OpenSearch) at production scale, or comparable experience in another modern stack; Hands-on experience with the engineering behind AI products, such as LLM applications, retrieval-augmented generation, vector search, or embedding models; Depth in areas such as multimodal (image and text) embeddings and search, agent orchestration frameworks (e.g. LangGraph, LangChain), model fine-tuning and adaptation, and deep learning frameworks such as PyTorch or TensorFlow; A fast learner with high agency who works fluently in an AI-native development environment and shares what they learn; Excellent communication and collaboration, comfortable engaging with both technical and non-technical stakeholders, from junior ICs to executives

Nice to have

Marketplace or multi-sided platform experience, with an understanding of scaling shared platforms

Benefits

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 and other wellbeing resources; Stipend for catered lunch on Tuesdays and Thursdays