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Senior Fullstack Engineer

Siena AI· Engineering
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RemoteFull-timePosted 4mo ago

About the role

Senior Fullstack Engineer at Siena, a distributed, AI-focused CX platform. Own meaningful parts of the platform end to end, ship reliable high-performance systems, and drive architectural decisions in partnership with product.

Responsibilities

  • Own features and systems across the full stack (frontend, backend, infrastructure) from problem definition through production.
  • Partner with product to break down ambiguous scope and ship in iterative, high-impact releases.
  • Make real architectural and design decisions in your area, and explain the reasoning so the team can build on it.
  • Take cutting-edge language models into enterprise customer workflows, where reliability and safety actually matter.
  • Solve hard engineering problems: API performance, microservices, scaling across channels and brands.
  • Maintain and improve our AWS infrastructure with a DevOps mindset.
  • Raise the bar around you. Share what you know, review thoughtfully, help teammates level up.

Qualifications

  • 5+ years shipping and owning systems that are live in production, not personal projects.
  • Strong in our core stack: Node.js, React, TypeScript, Express.
  • You've shipped LLM-powered features to real users. This is a must, not a bonus. You know what breaks when models meet production traffic.

Skills

Required:Node.jsReactTypeScriptExpress
Last updated Oct 22, 2026. Interested? Apply on the company site.

About Siena AI

Empathic AI Agents for commerce

Experience AI agents that combine empathy with automation for commerce. Provide personalized shopper support. Schedule a demo today!

AICustomer SupportE-commerceAutomationEmpathy
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