Staff Engineer – AI-Native Commerce

2 hours, 15 minutes ago
Full-time
Lead
Software Development
Phoenix Ecommerce Technologies

Phoenix Ecommerce Technologies

Phoenix Ecommerce Technologies is the operating system of performance commerce. We unify storefronts, checkout, payments, and CRM into a single AI-native platform that helps direct response merchants make the most money, with the least headache, on their own terms.

information technology & services
11-50
Founded 2024

Description

  • Own and improve Phoenix’s AI agents, including copy-site, tool execution, human approval flows, evaluations, tracing, observability, and cost tracking.
  • Build MCP infrastructure and tool surfaces for modifying pages, components, styles, and data bindings.
  • Develop autonomous systems that generate, validate, deploy, measure, and optimize storefront experiences.
  • Design APIs, data models, service boundaries, and architecture across TypeScript/Node.js, React, Postgres, MongoDB, and Redis.
  • Advance AI-native engineering workflows through custom agents, skills, hooks, MCP servers, and automated verification.
  • Build testing and quality systems, including Playwright E2E tests, rendering tests, integration tests, visual regression, and quality gates.
  • Own observability, tracing, SLOs, incident readiness, and operational reliability.
  • Write ADRs, RFCs, and technical specifications and lead design and code reviews.
  • Collaborate with the Engineering Lead and Principal Product Lead on storefront strategy and execution.

Requirements

  • 8+ years building production web platforms, with Staff-level impact across multiple systems or technical domains.
  • Production experience building LLM and agent systems, including tool calling, constrained generation, orchestration, autonomous workflows, or agentic SDKs.
  • Experience validating agentic systems through evaluations, tracing, observability, regression testing, and cost or performance measurement.
  • Hands-on use of coding agents, including specification writing, parallelizing work, and rigorous output verification.
  • Experience building AI-assisted engineering infrastructure such as custom agents, skills, hooks, MCP servers, or AI code review.
  • Expert-level TypeScript and Node.js skills.
  • Strong full-stack fundamentals in API design, data modeling, testing, distributed systems, and production operations.
  • Experience with Postgres, MongoDB, Redis, and production reliability practices including SLOs and incident response.
  • Strong technical writing skills, including ADRs, RFCs, and technical specifications.
  • Preferred: experience in ecommerce, DTC, storefronts, payments, Shopify, Liquid, CMS/page builders, rendering systems, MCP, Playwright, autonomous optimization, advanced caching, NestJS, or open-source tooling.

Interested in this position?

Apply directly on the company website

Apply Now

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