Numeral · 8 hours ago
Foundational AI Engineer
San Francisco, CA
Full-time
Onsite
Senior Level
$175K/yr - $300K/yr
7+ years expNumeral is building the automation backbone for internet commerce, focusing on sales tax compliance. They are seeking a Foundational AI Engineer who will design and implement AI systems and collaborate closely with product and leadership to create production-grade systems that enhance customer experiences.
ComplianceFinancial ServicesFinTechInformation TechnologySoftware
Responsibilities
Design, build, and operate production AI systems, including tool-calling agents, model orchestration layers, and RAG
Implement and maintain AI integrations using modern frameworks, MCP servers, and external model providers
Build and evolve scalable backend services and APIs that power automated workflows and customer-facing features
Think in automation and workflows: design systems using tools like n8n, Claude Code-style agents, or similar orchestration approaches where appropriate
Make architectural decisions that balance latency, cost, reliability, and iteration speed
Own infrastructure, observability, and performance for both AI and non-AI services
Collaborate closely with product, design, and data teams to ship features that solve real customer problems
Help define engineering best practices, AI safety/reliability norms, and our overall technical culture
Qualification
Required
7+ years of experience building products in high-growth environments
2+ years of experience building with LLMs
Avid use of state-of-the-art AI development tools such as Cursor and Claude Code
Fluency with backend technologies like PostgreSQL, Redis, and cloud services (AWS preferred)
Experience with frontend development, especially TypeScript and its ecosystem
Strong product sense, balancing performance, flexibility, and speed
Comfortable working in dynamic startup environments with evolving needs
Excellent communication and collaboration skills
Preferred
Experience in payments, tax, accounting, or regulatory tech
Experience with automation tools (n8n, Zapier-style systems, workflow engines) or building internal automation platforms
Familiarity with MCPs, tool calls, agent frameworks, or model orchestration patterns
Understanding of vector databases and concepts (such as Pinecone, HNSW)
Benefits
Full medical, dental, and vision coverage
Wellness perks like Headspace and the Peloton One App
401(k) to help you build long-term financial security
Lunch and snacks when you're in the office
Regular team offsites and company events as we grow
A culture built on ownership - your work matters and people will see it!
Company
Numeral
Numeral provides a platform that automates the sales tax process for e-commerce and SaaS businesses.
51-200 employees
H1B Sponsorship
Numeral has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2025 (1)
Funding
Current Stage
Growth StageTotal Funding
$57.5MKey Investors
Mayfield FundBenchmarkUncork Capital
2025-09-18Series B· $35M
2025-02-04Series A· $18M
2023-05-01Seed· $4M
Leadership Team
Sam Ross
Co-Founder & CEO
Recent News
2025-09-23
Company data provided by crunchbase