Software Engineer (AI)

About Numeral

The AI-native sales tax solution.

The role

## **About Numeral:*** Numeral is transforming how taxes get done. Digital businesses are currently bogged down by a painful web of regulations across 47 states and 50+ countries. We’re eliminating this burden so teams can focus on their core mission.* We’re the largest and fastest growing AI-native tax solution. Started in 2023, Numeral has raised over $57M from Benchmark, Mayfield, Y-Combinator, and many others. We now serve over 2,500 paying customers and have more than tripled our revenue every year in our history.* For this role we’re primarily hiring in our NY office, but do hire remotely in some cases## **About the role:**We’re looking for a **Foundational AI Engineer** who thrives in ambiguity, enjoys building real-world AI systems end-to-end, and wants to define the technical and architectural foundations of an early-stage startup.This is a hands-on role for someone who wants to design and implement LLM-powered automation systems: model orchestration, tool calling, MCP-style integrations, agentic workflows, and automation-driven tooling.## **What you’ll do:*** 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.* 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.## **What you’ll bring:*** 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.* Startup mindset: Not scared of ambiguity and hungry for rapid growth* Intensity & Ownership: This is not a 9-5 — we’re scaling rapidly and have a massive opportunity ahead of us.* Customer Obsession: You deeply care about the user experience and solving their problems## **Even better:*** 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).## **What we offer:*** Competitive salary and equity - you’ll share directly in the company’s success* 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!