Staff Software Engineer (Thomas)

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 good mix of proven and cutting-edge technologies and methods, including how we adopt AI across the platform; Teaching and mentorship: serve as a mentor and guide to engineers across the organization, helping them grow their skills; Code review: do code review 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 to promote open communication, strong collaboration, and high standards

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 that are transferrable to our stack: backend services in TypeScript and Node.js with GraphQL APIs, a React and Next.js frontend, PostgreSQL and analytical data stores, and search such as OpenSearch, at production scale; Comparable experience in another modern stack counts just as much; prior experience with our exact tools is not required; Hands-on experience with the engineering behind AI products: LLM applications, retrieval-augmented generation, vector search, or embedding models; Depth in areas our platform is growing into, such as multimodal (image and text) embeddings and search, agent orchestration frameworks (e.g. LangGraph, LangChain), model fine-tuning and adaptation, with 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; 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; A stipend for catered lunch on Tuesdays and Thursdays